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TRP 8400 D

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2. Control that all Manual Switches are in position off With the switch AUTO 2182 kHz S5 in position AUTO a normal tuning procedure is performed on 2182 kHz The Manual Tuning Switches are then switched ON as indicated by light in the Tune Set up Indicators Ensure that the transmitter is not keyed Check correct setting of the Manual Tuning Switches by switching S5 to position 2182 kHz and simultaneously control that none of the Tune Set up Indicators change If any of the indicators change repeat the procedure When 55 is switched back to AUTO the Tune Set up will be reset 2 10 INSTALLATION OF OPTIONAL TELEX FILTER To enable telex operation a receiver crystal filter must be installed in position X4 on PCB 610 RX EX Signal Path in the Transceiver Unit The center frequency of the filter must be 1398 5 kHz and the bandwidth must be in accordance with baud rate and frequency shift of the transmission The center audio input output frequency is adapted to the associated telex modem by programming of Telex Subcarrier in the Configuration PROM see section 5 12 Configuration PROM programming To install the filter remove the front cover of the RX EX Assembly and unplug the ribbon cable and the three coax cables Open the door of the unit and disconnect the RX coax cable at the BNC connector and release the cable from the tube Loosen the two screws of the P A Filter Assembly and swing it outwards Disconnect the EX coa
3. Entering of receiver transmitter frequen cies and channel numbers 4 5 6 b Secondary functions Setting scanning parameters time of day afefe wake up time and sound level of beeper Refer to section 4 1 for further details Terminating keyboard operation ENTER must be pressed to terminate all keyboard operations initiated by the RX TX STO RCL SCAN SET TIME or numeric keys Generally the displays will then be reset to their initial states if the operating parameters are valid An exception is the self test mode see section 7 4 12 7 Adjustment of receiver AF amplifier gain Sound level of internal speaker handset phone and headphone Pressing one of the keys turns on the corresponding annunciator which is turned off again when the key is released or when minimum or maximum sound level is reached pu Adjustment of receiver IF amplifier gain when the AGC is switched OFF 4 23 e e AGC ON e e AGC SLOW ANT ATT SQUELCH AGC OFF AGC FAST Switches ON OFF the AGC Automatic Gain Control The an nunciators indicate whether the AGC is ON or OFF When the AGC is ON the receiver IF amplifier gain is automatically adjusted and manual control disabled When the AGC is swit ched OFF the receiver IF amplifier gain is maintained on the level it had just before the AGC was switched OFF and manual control via the SENSITIVITY keys is enabled When selecting a new receive
4. 6 4 AC POWER SUPPLY UNIT The P 8250 is a combined AC DC Power Supply especially developed for powering the TRP 8250 Series The input power for P 8250 is AC and the output is an unregulated 32 V DC voltage Where a battery is required as a reserve source of electrical energy to the radiotelephone equipment it can be connected via the P 8250 power supply By means of the switch on the front panel it is possible to select between AC or Battery operation 6 5 ALC AND PROTECTION SYSTEM 6 5 1 Automatic Level Control ALC The Transceiver Unit has an advanced microprocessor controlled automatic level system which ensures that the optimum power is delivered to the Antenna Tuning Unit The Tune Sequence which is initiated either by pressing TUNE on the Control Unit front panel or by keying the transmitter after a frequency change has been carried out is terminated by a CW pulse of full power with a duration of 70 ms The signal level at the output of the Transceiver Unit is measured by means of a voltage_and current peak detector placed at the output of the P A Filter Assembly 6271628 or 629 The detector voltage 9 0 V at 250 W output power is applied to the Transceiver Control Board 624 PL3 9 FILPEAK and compared with the output voltage 8 62 V of the SETPOINT REGISTER in IC42 3 2 The error signal ALC is fed to the RX EX Signal Path 610 PL1 12 driving a voltage controlled attenuator placed in the exciter signal pat
5. 24 V available when equipment is ON TX KEYED 250 mA Open collector Low when TX KEYED 24 V Note 1 24 V available when equipment is ON 2182 KEYED 250 mA Open collector Low when TX KEYED on 2182 kHz GND RX MUTE 0 12 V Rx is muted when ted to GND 24 Note 1 24 V available TX ON when TX is ON GND Note 1 Max total current 1000 mA 620 TS 2 AUXILIARY TERMINALS TRANSCEIVER UNIT Table 5 5 993 626 5X 993 626 52 20 SPEAKER 19 SPEAKER GND 8 GND 5V 17 LINE OUT 24V 16 GND PWR ON 5 AUX IN BATT NEG 4 GND CU OPTA 13 TELEX IN 70 DATA 2 GND KEY LINE 8 11 AUX KEV RX RATE de GNC Ur RY TELEX KEV HF RY GND TX SCAN S S TX 12 GND 45V 2182 SEL 15V 17 GND RY REM GNO TX REM HEBDEHONE 2 CONTROL UNIT CHu SK CU SK 1 VIEWED FROM SK WANDSET OUTSIDE MIC 5 GND lt EARPIECE gt 160 75 Hay E HANDSET KEV NUT 601752 A 1 A L HANDSET I FLUG SD WITH RACOT TRANSCEIVER UNIT TU SK1 KK S t 1 6275k2 _ 1 6285 2 TA 829 SHE 620134 TC 24V TX Ol 24 TX OH pet EV 4 750 282 TE fWKOR i e TUNE ELIEL X T I 12 DUMM I ANT Av ZANT PEAK 5 TURRIS pls 12 24 3ev m 05
6. 5 12 1 5 HITACHI APPLICABLE PROMS TMS2532JL TMS25L32JL HN462532 HN462532G HN462532G 2 5 9 5 12 2 CONFIGURATION PROM MAP Address DEC HEX 0 000 SINGLE FREQUENCY 4 004 SINGLE FREQUENCY 8 008 SINGLE FREQUENCY 12 00C gt LEGAL FREQUENCIES SINGLE FREQUENCY SINGLE FREQUENCY 255d FFh LIMITER BYTE SPECIAL SYSTEM PARAMETERS 4095 FFF 5 10 2 12 5 SINGLE FREQUENCY FORMAT 07 D6 D5 04 03 802 DI DO ADDR n ITU BCD x 10 MHz BAND n 1 BCD x 1 MHz BCD x 100 kHz n 2 BCD x 10 kHz BCD x 1 kHz n 3 BCD x 100 Hz MODUL ATION 2 12 5 1 MODULATION HEXADECIMAL J3E 85 H3E H2A LSB JIE amp R3E reserved for future use reserved for future use reserved for future use reserved for future use reserved for future use reserved for future use reserved for future use don t care C200 22 OQ OO I ON V 5 MAL PO I5 C2 2 12 5 2 RX AND TX BITS 0 Frequency and modulation do not apply to RX or TX respectively 1 Frequency and modulation apply to RX or TX respectively Both bits may be programmed in the same array 3 12 3 3 ITU BIT D ITU channel apply to programmed frequency in accordance with selected channel number 1 ITU channel do not apply to programmed frequency 2 12 5 4 ITU BAND BIT 0 The programmed frequency is within the band specified by the short number 1 The programmed
7. CONNECTORS AND CABLE TYPES i MOTE 1 m pes mm f SCREENED CABLE 2 025mro 2 5mm Sg MAy BE USED u aa 2 2 2 POLE JACK PLUG e 6 35 DUNG AINTE NINAS 3 SCREENED MULTIWIRE CRBLE 16x 0 5mm Sq COPPER STRAP 50 0 5mm CONNECTOR TYPE 259 COAXIAL CABLE TYPE RS 213 U OR RG 8A U ER THE ANTENNA TUNI GIWENNA RELAY CA ED FOR TRANSMISSIO SCREENED CABLE EE NOTE 3 CABLE SEE NOTE 2 WIRE 1 2 5mm 59 NOTE 2 MS CONDUCTOR E HI 022 265i ok b t 250 FOR SUPPL 0 COPPER STRAP 008 0 5 NOTE 3 MA ENGTH f1 5 POLE CONNECTOR DIN 41524 TRY 12 2 OR 3 POLE JACK PLUG 06 35 x E AN PARET l 4 pi 2 I4 NEM FTT t 2 2 32v MULTILIIRE CABLE MAY BE USED if CONVENIENT USE PIN TERMINAL ADAPTER Hx 0 S XSZ8 441 INOHd3TILOIOVY 404 WVYOVIC ONIMIM NOILVTIVLSNI Z A 2 412 n 7 didi jns TR S Tiu WoW a i eI cto ed l fara 7 90072030709 T 24353 02110 037005 0324 2070 FF CL CA Su s ATIHDIA G9 345 39 C IIIS ONNOX Y AG 0311075 786 237089 TEL Cx Hey EHS DO XE i 5c unu bc iiir a NS Bo cuyo JOLT TA TRIN Try OMIELLIS 3096 7
8. Disable VERY NARROW Key Enable Any other data are to 255d FFh Antenna in TX Off State Antenna disconnected Antenna connected Any other data are defaulted to 255d FFh Distress mode Select J3E when 2182 is pressed Select H3E when 2182 is pressed Any other data are defaulted to 255d FFh Numeric keyboard type CCITT Top left key 1 Standard Top right key 9 Any other data are defaulted to 255d FFh Alarm Band Disable alarm below 1605 kHz Enable alarm in all bands Any other data are defaulted to 255d FFh Maritex Enable Maritex interface Disable Any other data are defaulted to 255d Ffh Receiver frequency status Only receiver frequencies contained in lower part of the Prom Free receiver frequencies Any other data are defaulted to 255d FFh 4075d FEBh 195d C3h 255d FFh 4074d FEAh 255d FFh BCD 4073d FE9h 21d l5h 255d FFh Frequency Display Disable frequency display Only channel numbers can be entered and displayed except using special pro cedure Enable frequency display Any other data are defaulted to 255d FFh Maximum output power Full output power range Programming in packed BCD will limit the maximum output power to 10 times the programmed value Ex Data Output power 16d 10h 100 W 24d 18h 180 W Any non BCD data or BCD data exceeding the max power of the equipment are defaulted to 255d FFh Reduced output power between 1 6 a
9. Unit 3 3 Adjust RI until the counter reads f 71 680000 MHz 1 Hz If the TCXO is marked with a frequency offset multiply the offset by 7 and add to the frequency stated above For example Frequency offset 2 Hz Add 7 2 14 Hz Adjust to f 71 680014 MHz 1 Hz 3 4 Replace all covers and sockets again 7 2 Replacement of backup battery The lithium backup battery should be changed within four years after its installation in the equipment The expiration date is marked on the battery If the time is exceeded the battery voltage may become too low which causes the real time clock to default to 00 00 and the contents of the user programmable memory to get lost when the equipment is switched OFF The battery is located in the Control Unit on Control Board 600 and should be changed by a qualified technician 7 2 8 TROUBLE SHOOTING AND SERVICE 8 1 Malfunction If the equipment is not functioning correctly a check should be made that is being operated properly see chapter 4 8 2 Replacement of FUSES The Transceiver Unit contains two replaceable fuses located at the front of the Switched Mode Power Supply The fuses become accessible when the front door is opened Spare fuses are placed on the Switched Mode Power Supply The AC Power Supply Unit contains a fuse located at the front of the unit Spare fuses are located behind the cover Fuse ratings are given in table 8 1 below Fuses with marked ratings within
10. 0 5 mm copper strap is run preferably uninterrupted to the earth terminal at the bottom of the Antenna Tuning Unit Should it be necessary to break the copper strap for example to pass through a deck tvo 1 2 or M12 bolts should be used for this feed through The copper strap may not be passed through iron pipes and should be kept at minimum distance of 0 5 m from iron parts of some extent If this minimum distance cannot be kept the copper strap must be effectively connected to these parts using a strap having the same dimensions On wooden ships having a superstructure of metal this superstructure should also be effectively connected to the copper strap by using stainless steel bolts and preferably pieces of stainless steel strips betueen the metal parts 2 2 2 Other Units All other units must be grounded separately to the ships metal in the shortest possible way The Control Unit is connected to ground from the ground frame at the cable entries using a 2 5 mm sq vire In the Transceiver Unit a ground strap is connected to the ground terminal at the cable entry On vessels with no metallic superstructure the ground connection at the Control Unit and the Transceiver Unit may be omitted 5 2 5 6 Antennas The standard equipment is used with separate transmitting and receiving antennas If however the Antenna Tuning Unit is fitted with the optional Antenna Relay 541 common antenna may be used for transmission and receptio
11. UP will increase the reading address to the next higher located format if it is not the LIMITER BYTE Pressing DIMMER DOWN will decrease the reading address to the next lower located format if the present reading address is higher than PROM address 0 Keeping either DIMMER key pressed will advance the reading address automatically Pressing 2 or ENTER will restart or terminate second function For further PROM format information refer to section 4 10 Control BF0 frequency The receiver display shows the present BFO frequency The transmitter display shows the stored BFO frequency selected on power up Pressing STO will store the present frequency Pressing RCL will recall the stored frequency Pressing 2 or ENTER will restart or terminate second function 4 16 245 246 247 248 249 Read special system parameters in configuration PROM The receiver display shows the PROM address in decimal initialized to top of PROM 4095 The transmitter display shows the PROM data in decimal Pressing RCL will change the displayed data to hexadecimal useful when reading BCD Since the display decoder is not designed for letters the Following symbols are displayed for hexadecimals greater than 9 ank Pressing DIMMER DOWN will show the next lower PROM address Pressing DIMMER UP will show the next higher PROM address Pressing 2 or ENTER will restart or terminate se
12. entry of RX frequencies 1 0 1 1 Inhibit RX key 2 0 Normal 1 Inhibit direct entry of TX frequencies 3 0 Normal 1 Inhibit TX key 4 0 Normal 1 Inhibit store function 5 0 Normal 1 Inhibit STO key 6 0 Normal 1 Inhibit entry of scan parameters 7 0 Normal 1 Inhibit certain second function pages If programmed in the Configuration PROM ref section 5 12 either of the RX bit O amp 1 and TX bit 2 3 GUARD bits set to l will cause the respective display to show channel numbers exclusively If no channel number applies to the frequency then a C will be displayed e g immediately after SUPPLY ON Clear GUARD bit 7 PAGE GUARD fe He 1 2 3 4 1 Switch supply OFF 2 Press RCL and keep it 3 Switch supply ON 4 Keep RCL pressed until the beeper sounds Guard bit 7 is now cleared and all second function pages can be entered To prevent unauthorized use this syntax is not described in the User Manual 4 1 12 8 SECOND FUNCTIONS SUMMARY 200 Start automatically stepped self test 201 Start manually stepped self test 202 Start automatic stepped self test from an arbitrary test number 205 Start manually stepped self test from an arbitrary test number 241 Read accumulated on time 242 Read and program receiver tune step 243 Read single frequencv formats 244 Control BFO frequency 245 Read special system parameters 246 Read CU release date and version 247 Read TU release date and v
13. frequency is 1 MHz above the band specified by the short number 2 12 3 5 ITU CHANNELS When programming a LEGAL FREQUENCY table consisting of the ITU channel frequencies and or other frequencies to be selected by the RECALL ITU syntaxes it is necessary to consider the search algorithm used This algorithm initiates the search at PROM addr 0 and progresses until either the LIMITER BYTE 255d FFh or the desired SINGLE FREQUENCY is found The RECALL ITU FREQUENCY PAIRS FROM PROM syntax utilizes 2 separate searches to obtain the pair Having entered RX RCL 8 1 5 ENTER the desired frequency is found as the 15th SINGLE FREQUENCY in the 8 MHz band if ITU BAND BIT 0 having the RX BIT 1 ITU BIT 0 and the modulation nibble validating the present receiver mode 2 12 3 6 FREQUENCY BAND FORMAT The single frequency format may be used in pairs to form a frequency band format as shown below This format is used to additionally limit the transmitter frequency range When programmed transmission outside this band is not possible More than one band may be programmed Please note that the bit and modulation nibbles must be 0 D D6 D5 D4 D3 D2 DI DO ADDR n alvays BCD x 10 MHz 1 n 1 BCD x 1 MHz BCD x 100 kHz lower frequency n 2 BCD x 10 kHz BCD x 1 kHz 21 n 3 BCD x 100 H F sb BCD x 10 MHz l n 5 BCD x 1 MHz BCD x 100 kHz upper frequency n 6 BO x T
14. function terminated 4 17 251 Reset system The function requires confirmation as described for the syntax key 5 32 msec after releasing the STO key both CU and TU processors are reset by running the power up program 4 1 12 5 PAGE 7 27 Controls an 8 bit OPTION register Executable lines 270 Toggle OPTION bit 0 271 1 2423 2 273 3 274 4 275 5 276 6 277 7 278 Clear OPTION register 279 Display OPTION register bits 0 3 in transmitter display bits 4 7 in receiver display All lines will display the resulting OPTION register Pressing 2 or ENTER will restart or terminate second function OPTION bit functions BIT LEVEL FUNCTION 0 Reserved for future use 1 2 5 i 2 x 3 0 Normal 1 tnable special squelched scanning in phone mode 4 0 1 1 Enable programmable receiver tune rate 5 0 Normal 1 Enable phone call interrupts in MARITEX mode 6 0 Normal 1 Disable ENTER key during MARITEX mode 7 0 Normal 1 No time display cursor 4 1 12 6 PAGE 8 28 Controls an 8 bit PRESET register intended for use in installation only Special system parameters which are difficult to specify before installation can be changed on location by toggling the respective bit in this non volatile register To protect the PRESET register against erroneous changes Page 8 can not be entered when GUARD bit 7 is set
15. impedance Less than 2 5 kohm 1 6 30 MHz 7 18 m wire and or whip Fully automatic 0 2 1 5 sec 3 5 Input Impedance after tuning 50 ohm SWR lt 1 4 Manual setting possible for 2182 kHz Power Handling Capability 250 W PEP 125 W Average 3 5 POWER REQUIREMENTS Supply Voltage 12 24 32 V DC 10 30 no presetting Connection vill not earth Supply Battery 110 120 220 240 V AC optional external Power Supply Unit type P 8250 Power Consumption approx Receive only J3E unmodulated H3E unmodulated H3E alarm CW keyed MCW keyed ARQ telex 3 6 DIMENSIONS AND WEIGHTS Control Unit Width Height Depth Weight Transceiver Unit Width Height Depth Weight Antenna Tuning Unit Width Height Depth Weight 3 6 50 100 360 420 640 420 330 372 87 203 422 368 280 330 440 130 mm mm mm kg approx mm 500 mm incl mounting brackets mm mm kg approx mm mm 535 mm incl antenna horn mm kg approx AC Power Supply Unit optional Width Height Depth Weight 241 367 101 17 mm mm 440 mm incl attachment rails mm 121 mm incl attachment rails kg approx 4 1 12 1 SECOND FUNCTION SYNTAX 1 2 3 4 5 Press 2 The transmitter display is blanked and the decimal points start flashing The receiver display shows 2 to identify a non standard display and 2 If 2 wa
16. mode selected If transmission of H3E is illegal and trans mitter is ON the transmitter display is flashing and transmitter function disabled Selecting transmission of R3E and reception of R3E and J3E signals Upper Side Band Annunciator ON indicates R3E mode selected 4 25 Annunciator ON indicates Telex mode selected The Telex function is optional Selecting transmission and reception of Telex in F1B mode TELEX Fast set up for 2182 kHz Pressing this key will instantly change receiver and transmitter frequency to 2182 kHz select AM H3E mode select FULL POWER and enable trans mitter function TX ON The loudspeaker s and AGC are automatically switched ON and RF AMP ANT ATT and SQUELCH switched OFF Antenna current is displayed when transmit ting Fast set up for 500 kHz Pressing this key will instantly change receiver frequency to 500 kHz and select MCW 2 mode The loudspeaker s and AGC are automatically switched ON and RFAMP ANT ATT and SQUELCH switched OFF IF FILTER keys are enabled and the intermediate type filter automa tically selected Selecting transmission and reception of AlA morse tele ew graphy signals Annunciator ON indicates CW mode selected If transmission of 1 is illegal and transmission is ON the transmitter display is flashing and transmitter func tion disabled IF FILTER keys are enabled and the inter mediate type filter automatically selected BFO is enabled and AGC is
17. moving a strap to the appropriate position 5 5 IC19 TELEX KEY DELAY SELECTION factory setting 0 ms TP S o o c TP2 w gt o O o o ToT Too o 0 0 o o o o o o 9 E E E E E E E E NN NO en NO C M NO NO 4 N Q ha xD De o NO 4 N N Telex modem pre keving time minus selected telex kev delav time must be equal to 7 ms or more 5 9 Final Installation Check 5 9 1 For operation of the equipment please refer to chapter 3 Note that an appropriate programmed Configuration PROM must be installed in the Control Unit see section 5 12 The Antenna Tuning Unit will tune automatically to the transmitter antenna when the equipment is keyed or the TUNE button is pressed The standing wave ratio SWR at the input of the tuning unit is automatically measured after the tuning sequence If the SWR exceeds approx 3 the Power Annunciator on the Control Unit will flash indicating that correct tuning has not been obtained In this case investigate the antenna installation and control that the antenna length is within the boundaries 2 9 2 2182 kHz Manual Tune Set up To enable manual tuning on 2182 kHz the Manual Tuning Switches in the Antenna Tuning Unit must be preset on the final antenna installation Remove the cover of the Antenna Tuning Unit and follow below procedure 5 6 TUNE SETUP INDICATORS AUTO 2182 kHz 51 52 53 54
18. ohms audio input Open in TELEX mode 600 ohms audio input Open in USB LSB AM or R3E modes when AUX KEY is LOW 600 ohms audio output Internally adjustable Load impedance 8 ohms Inhibit keying when LOW Reserved for future use An optional Line Transformer Board 603 is available providing balanced input output KEY INHIBIT input is applicable only when Preset bit 4 EM function 284 See second 601 TS1 AUXILIARY TERMINALS CONTROL UNIT Table 5 2 Signal level Remarks Input Internally adjustable 8 dB GND EARPIECE Output 500 ohms Controlled by VOLUME 12 V Output Supply for MIC Amplifier HANDSET KEY Input Keyes Tx in USB LSB AM or R3E when LOW HEADPHONE SOCKET I Direction Signal level Remarks 0 TO 10 160 mW Mono or stereo headphones may be used 8 ohm 5 kohm Built in speaker is discon nected when jack is inser ted MORSE KEY SOCKET Direction Signal level 1 MORSE KEY Input 0 12 V 2 GND EXTERNAL CONNECTIONS CONTROL UNIT Remarks Keyes Ix or MCW when LOW Table 5 3 Remarks 22 Input Supply from 12 24 32 V battery or P 8250 GND Screen No 1 2 3 Input Supply from 12 24 32 V battery or P 8250 TS 1 SUPPLY TERMINALS TRANSCEIVER UNIT Table 5 4 No 24 V Note 1 24 V available when equipment is ON TX ON 250 mA Open collector Low when TX on 24 V Note 1
19. switched ON Selecting transmission and reception of H2A modulated morse telegraphy signals Annunciator ON indicates MCW mode se lected If transmission of H2A is illegal and transmission is ON the transmitter display is flashing and transmitter disabled IF FILTER keys are enabled and the intermediate type filter automatically selected AGC is switched ON B Activating Antenna Tuner Pressing this key will start the automatic tuning procedure in the ATU Antenna Tuning Unit Tuning is performed in less than 1 5 sec Pressing the handset key for the first time after changing transmit ter frequency will also start the tuning procedure and it is therefore not necessary to press TX TUNE in this case TX TUNE is normally used when the frequency has been unchanged for some time and the antenna impedance has changed due to external circumstances see section 4 1 TX TUNE Selecting low transmitter output power approx 10 W PEP Annunciator ON indicates LOW POWER selected Selecting medium transmitter output power approx 60 W PEP Annunciator ON indicates MEDIUM POWER selected MEDIUM 9 2 z m Selecting full transmitter output power approx 250 W POWER PEP Annunciator ON indicates FULL POWER selected PRESS BOTH TO TEST STOP ALARM PRESS BOTH TO SEND ALARM Testing and transmitting the two tone alarm signal Press STOP ALARM and the left key simultaneously and keep pressed to
20. wake up time star ting dormant state and setting dwell time in scanning for details see section 4 1 Pressing DUPLEX causes no action in the TRP 8250 S a Primary function Change of receiver frequency When RX is pressed the receiver display is blanked and its decimal point starts flashing indicating that a new receiver frequency must be entered into the display via the numeric keys b Secondary function Setting of wake up time when RX is pressed immediately after SET TIME Opening of the external scan port see section 4 1 a Primary function Change of transmitter frequency When TX 18 pressed the transmitter display is blanked and its decimal points starts flashing indicating that a new transmitter frequency must be entered into the dis play via the numeric keys b Secondary function Recalling of transmitter frequency from PROM Closing of the external scan control port see section 4 1 a Primary function Recalling stored receiver transmitter frequencies When RCL is pressed the receiver and transmitter displays are blanked and their decimal points start flashing indicating that a channel number 0 75 must be entered into the receiver display via the numeric keys b Secondary function Recalling vake up time when RCL is pressed immediately after SET TIME and recalling scanning parameters when RCL is pressed immediately after SCAN see section 4 1 Numeric keys a Primary functions
21. 0 7 Clear GUARD register 4 15 4 1 12 2 PAGE 0 204 Self test For detailed information see self test description in chapter 8 Executable lines 200 201 202 203 Start automatic stepped self test Start manually stepped self test Start automatic stepped self test from an arbitrary test number Start manually stepped self test from an arbitrary test number 4 1 12 3 PAGE 4 24 Miscellaneous functions Executable lines 241 242 243 244 Read accumulated on time The receiver display will show total operation time of the TRP 8250 S with 1 hour resolution Pressing 2 or ENTER will restart or terminate second function Read and program receiver tune step The receiver display shows the present programmable tune step A new tune step may be entered via the numeric keys Tune steps between 100 Hz and 99 kHz are possible Pressing ENTER will terminate second function To use this additional tune step OPTION bit 4 should be set to 1 ref second function 274 In this case the TUNE RATE key will introduce a fourth state indicated by all tune rate annunciators switched off Read single frequency formats in configuration PROM The reading address is initialized to PROM address 0 The receiver display shows the programmed frequency if the RX bit 1 The transmitter display shows the programmed frequency if the TX bit 1 The mode annunciators show the programmed modulation s Pressing DIMMER
22. 0TS3 Control Unit The screen must be connected to the chassis bracket For connections see installation diagram fig 5 3 5 7 2 Transceiver Unit to Antenna Tuning Unit connections The units are interconnected by an RG 213 U RG 8A U coaxial cable and 16 0 5 mm 84 screened multiwire cable 100 metres In one antenna installations using the optional Antenna Relay Board 641 jan additional RG 213 U coaxial cable is used The coaxial cables are terminated in UHF connectors PL 259 type The sockets in the Transceiver Unit may be removed from the chassis for easier access The multivire cable is mounted in the same vay in the Transceiver Unit as the cable from the Control Unit The vires are connected to the terminal strip marked 620151 Antenna Tuning Unit see fig 5 3 5 4 NOTE If the TRP 8250 S is not operated with an ATU 8250 Antenna Tuning Unit a strap must be placed between terminal no 6 TUNE and terminal no 7 TPR of 620151 A missing strap vill cause the Power Meter display to flash 11 sec after a TUNE sequence has been initiated The cables enter the Antenna Tuning Unit through the threaded cable entries at the bottom of the unit The wires must be connected as shown in fig 5 5 The screen of the multivire cable must be connected to the receptacle at the grounding tab next to the terminal strip NOTE Wire ends of the multiwire cable should be fitted vith cable end sleeves before mounting In installati
23. 100 Hz steps optional 20 deg C to 55 deg C 0 deg C to 40 deg C 3 1 3 2 RECEIVER CHARACTERISTICS Frequency Range Frequency resolution Antenna Impedance Input Protection IF Selectivity Sensitivity 100 kHz to 30 MHz 10 kHz to 100 kHz with reduced performance 100 Hz by numerical frequency keyboard entry A search fine tuning facility is provided with selec table increment steps of 10 Hz 100 Hz or 1 kHz In addition a user programmed step size may be selected Below 4 MHz 10 ohm in series with 250 pF or 50 ohm std internally selectable 4 MHz to 30 MHz 50 ohm 30 V RMS EMF for up to 15 min SSB 350 Hz to 2 7 kHz AM 2 7 kHz or 4 kHz optional CW MCW TRP 8252 5 8255 5 Wide 2 7 kHz or 4 kHz optional Inter 1 2 kHz or 2 7 kHz optional Narrow 250 Hz or 500 Hz optional Very Narrow 150 Hz optional TELEX optional 150 Hz or 250 Hz or 400 Hz Max antenna input EMF for 10 dB SINAD SSB High impedance antenna 1 6 4 MHz 1 2 uV 50 ohm antenna 1 6 30 MHz 0 8 uV 3 2 Intermodulation out of band Cross modulation Blocking Image Rejection IF Rejection Spurious Response Rejection Internally generated spurious signals Spurious Emission AM High impedance antenna 100 kHz 400 kHz 60 uV 400 kHz 1 6 MHz 20 uV 1 6 MHz 4 MHz 7 uV 50 ohm antenna 100
24. 21 Voltage Converter PCB 612 or 613 or 614 Master Oscillator
25. 3 dB SETPOINT voltage 5 71 V ALCHOLD voltage increased by 0 54 V relative to Full Pover preset value The power vill recover to Full Power level when the transmitter has been muted during two minutes To enable Full Power ARQ Telex Transmission the system accepts keying duty cycles less than 50 and modulation rates greater than 3 baud without power reduction 6 5 2 2 ATU Protection To protect the Antenna Tuning Unit against excess current for instance if the antenna is shortcircuited an average current detector is provided The output of the detector IANTAVR is connected to the Transceiver Control Board 624 PL4 14 and is OR ed together with the FILPEAK voltage from the P A Filter Assembly 627 628 or 629 Now if the average current exceeds 6 A during a transmission an error voltage is generated at IC42 l exceeding the voltage generated by the ALCHOLD REGISTER thereby increasing the ALC voltage and reducing the output power and thereby the average current If the SWR at the input of the Antenna Tuning Unit exceeds 1 3 logical signal SWROK goes high and Pover Display Annunciator on Control Unit front panel starts flashing informing the operator that a better antenna match might be 6 5 obtained by carrying out a new Tune Sequence To prevent overheating of the Antenna Tuning Unit a temperature sensor is incorporated If the internal temperature of the Antenna Tuning Unit exceeds 85 deg C logical signal TCO goes low a
26. 31893 03 33425 05 0 9 53187 JWIMILIAW CINIS n elz 94 318V 1VIXV03 TENNA WIRE TERMINAL TX 640SK1 RX 640SK2 640TS1 DAXIAL CABLE RG 21 COPPER STRAP 100 x 0 5mm INSTALLATION WIRING OF ANTENNA TUNING UNIT 8250 993 630 42 PSU TS2 PSU TS1 OAS si Ei WIRE 1 2 5mm Sq SCREENED CABLES CABLE INSTALLATION WIRING OF AC POWER SUPPLY UNIT 8250 993 630 32 6 TECHNICAL DESCRIPTION 6 1 CONTROL UNIT The Control Unit contains a loudspeaker two printed circuit boards Control Board 600 land Audio Processing 60l and a membrane keyboard In addition an optional Squelch Board 602 land an optional Line Transformer Board 603 may be installed It furthermore contains connections for handset headphones extension speaker morse key and telex equipment The Block Diagram of the Control Unit illustrates the functions of each circuit board while the Interconnection Diagram shows the interconnections between the boards see chapter 9 for diagrams The Control Unit is housed in a Noryl PPO cabinet suitable for tabletop or bulkhead mounting The front panel can be tilted for convenient operation when the unit is mounted vertically as well as horizontally 6 2 TRANSCEIVER UNIT The Rx Tx Assembly of the Transceiver Unit contains the Rx Ex Signal Path 610 a Synthesizer Board 6llland a Master Oscillator 612 or 613 614 T
27. 4083d FF 3h 4072d FE8h 5 17 DATA 195d C3h 210d D2h 16d 10h 165d A5h 195d C3h 210d D2h 16d 10h 165d A5h 210d D2h 210d D2h 16d 10h 165d A5h 195d C3h 210d D2h 16d 10h 165d A5h 195d C3h 195d C3h 195d C3h 210d D2h 6d 06h 2d 02h 16d 10h 165d A5h 195d C3h 210d D2h 210d D2h 6d 06h 2d 02h 16d 10h 165d A5h 195d C3h 195d C3h 195d C3h 195d C3h 195d C3h 210d D2h 6d 06h 2d 02h 16d 10h 8257S 4094d FFEh 4086d FF 6h 4085d FF 5h 4072d FE8h 4094d FFEh 4092d FFCh 4091d FFBh 4090d FFAh 4089d FF9h 4086d FF6h 4084d FF4h 4083d FF 3h 4072d FE8h 5 18 165d A5h 210d D2h 210d D2h 16d 10h 165d A5h 195d C3h 195d C3h 195d C3h 195d C3h 210d D2h 6d 06h 2d 02h 16d 10h Designation Direction No TX REM Output GND RX REM Input GND 2182 SEL Output GND SCAN S S Input GND TELEX KEY Input GND AUX KEY Input GND TELEX IN GND AUX IN GND LINE OUT GND SPEAKER SPEAKER KEY INHIBIT GND OPTIONAL IN GND Signal fever RS 2320 RS 232C 74LS00 0 12 0 12 V 0 12 V 16 to 10 dBm 16 to 10 dBm 10 to 10 dBm to 5 W 0 12 V 0 12 V Remarks Remote Control Serial Data Remote Control Serial Data High when 2182 is selected Start Stop of scanning user programmable Keyes Tx in TELEX mode when LOW Keyes Tx in USB LSB AM or R3E modes when LOW 600
28. 5 percent of the ratings must be used Note that fast or slow blowing fuses must be used as specified Location Fuse Function Symptom if fuse is blown Rating 48 V to Equipment dead but Main Voltage Converter Relay operates when Supply switch is activa ted Voltage indicator lamp in Switched Mode Power Supply is lit when power is on Transceiver Unit 48 V to Power Amplifier No RF output power 110 120 V 12 5 A slow Mains input No light in DC OUTPUT LAMP with mains switch position MAINS ON 220 240 V 6 3 A slow Table 8 1 8 3 HOW TO MANUALLY TUNE THE ANTENNA TUNING UNIT TO 2182 kHz IN CASE OF FAILURE IN THE AUTOMATIC TUNING SYSTEM 1 Switch SUPPLY OFF on Control Unit 2 Remove cover from Antenna Tuning Unit 3 Locate AUTO 2182 kHz toggle switch and switch it to 2182 kHz downwards 4 Refit the cover 5 The radiotelephone is now ready for operation on 2182 kHz only 8 4 DESCRIPTION OF SELF TEST FUNCTIONS Self test can be done in two different modes auto mode and step mode Auto mode is intended for a quick verification of all functions it will execute all tests in sequence and stop if a malfunction is detected Step mode is intended for service purposes it allows step by step testing and gives the operator the possibility to make measurements during the tests and to repeat tests Thus it can be used as a built in signal generator for m
29. 8 4 2 EXECUTION OF SELF TEST FROM AN ARBITRARY TEST NUMBER AUTO MODE gt ARDE TE OT NUMBER AUTO MODE The self test is executed by pressing fey ce The test number is entered via the numeric keys into the receiver display Pressing ENTER will start self test from the specified test number if possible Pressing other keys than ENTER or numerics will resume normal operation as will pressing an invalid test number Execution of the self test will progress as described in above passage 8 4 3 EXECUTION OF SELF TEST IN STEP MODE The self test is executed by pressing J Jb The test will start by executing test number 1 and displaying the test number and the error code The test setup will remain until the operator presses DIMMER UP then it will proceed to the next test The last test can be repeated by pressing DIMMER DOWN If the operator presses any key but DIMMER UP or DIMMER DOWN the Transceiver will return to normal operation The Transceiver will return to normal operation when the last test has been executed 8 3 Switched Mode Power Supply SMPS incl 622 and 623 Power Amplifier 626 or 631 RX EX Signal Path 610 behind front cover of door Hs m de de de p Me sh ous cb uela e Ge Fh e oe e PCB 624 Transceiver Control Board behind cover PCB 627 or 628 or 629 P A Filters Board PCB 620 Interconnection Board PCB 6
30. ARITEX ATU with built in ant switch built in PCB 641 Antenna disconnected in tx off 9 Selectable band widths Real time clock Squelch Automatic keying device AKO 7 REMOTE CONTROL 9 19 14 Frequency displays disabled 12 24 32 volt or 24132 volt battery 110 120 220 240 volt AC power supply 3x380 3x220 3x440 volt AC power supply Type number control Receiver gain Frequency stability Telex facilities e S Antenna Facilities Power Supply Legend Standard facility feature O Optional facility feature INSTALLATION 2 1 BASIC VERSIONS In common TRP TRP TRP TRP TRP TRP TRP TRP TRP 8250 5 8251 5 8252 5 8253 5 8254 5 8255 5 8256 5 8257 5 8258 5 250 Watt P E P Power Amplifier Simplex Semi duplex operation 1 6 30 MHz Marine SSB Radiotelephone 1017 preprogrammable frequencies in Marine Bands Marine SSB Radiotelephone Free frequency selection Marine Bands Marine SSB Radiotelephone Free frequency selection Marine Bands CW and MCW facilities Marine SSB Radiotelephone Free frequency selection all bands General Purpose SSB Radiotelephone Free frequency selection all bands General Purpose SSB Radiotelephone Free frequency selection all bands CW and MCW facilities Ge
31. From 750 W to 400 W between 1 6 4 MHz Overall reduction Receiver 10 kHz 30 MHz Marine bands channels or Reduced power gt uN eon 9 T vansmission frequericies co j zi n 9 9 Marine bands oa 24 free frequency Bar a Mx ET Free EU 500 kHz facility USB J3E amp R3E Reception 1 Transmission a o 4 LSB key disabled Transmission disabled Full range 2182 kHz only Disabled except 2182 kHz trans ef F1B incl felex filters p Two tone alarm generator Alarmtest into dummy load Modes Transmission Enabled Disabled Alarm 2182 kHz Legend iE Standard facility feature B O Optional facility feature INSTALLATION XD 8000 TECHNICAL TRAINING COURSE TRP TRP TRP TRP TRP TRP TRP TRP TRP Facility or feature 8 50 8X51 8X52 8X53 8X54 8X55 8X56 8X57 8X58 76 user programmable 9 HE e ss le e w 1017 pre program freq pairs incl ITU chan in marine vers ITU channels pre programmed Pre programmed reception frequencies Slow fast RF amplifier RF AMP Antenna attanuator ANT ATT 1 5 PPM 0 8 PPM 0 4 PPM 1500 2000 Hz telex offset 1700 Hz is standard Display of carrier frequency assigned freq is standard Unattended telex AUTO TELEX 9 M
32. O kHz BCD x kHz n 7 BCD x 100 Hz 9 12 4 SPECIAL SYSTEM PARAMETERS ADDR DATA DESCRIPTION 4095d FFFh Telex audio center frequency Display of assigned frequency 21d l5h 1500 Hz 22d l6h 1600 Hz 37d 25h 2500 Hz 4095d FFFh Display of carrier frequency 149d 95h 1500 Hz 150d 96h 1600 Hz 153d 99h 1900 Hz 160d AQh 2000 Hz 165d ASh 2500 Hz When assigned frequency display is used an input at the programmed audio center frequency vill be transmitted at the displayed frequency When carrier frequency display is used an input at the programmed audio center frequency vill be used as an USB signal at the displayed frequency the audio center frequency Any other data are defaulted to 23d 17h 4094d FFEh 4093d FFDh 4092d FFCh 4091d FFBh 4090d FF Ah 4089d FF9h 4088d FF8h 4087d FF7h 4086d FF6h l65d A5h 255d FFh 180d B4h 255d FFh 4d 04h 195d C3h 4 255d FFh 195d C3h 255d FFh 195d C3h 4 255d FFh 195d C3h 255d FFh 195d C3h 255d FFh 195d C3h 255d FFh 210d D2h 255d FFh Transmitter frequency status Free transmitter frequencies Only transmitter frequencies contained in lower part of the Prom Any other data are defaulted to 255d FFh Dummy load during alarm test Enable dummy load Disable dummy load Any other data are defaulted to 255d FFh Morse Enable 500 CW MCW FILTER and BFO keys Disable i
33. TECHNICAL MANUAL 8400 D SERIES NOTE The technical manual for the TRP 8400 series is based on the TRP 8250 D series manual with all deviations descreibed in the rear AMENDMENTS 100 9 94 910 000 46 ISSUE A5 Skandinavisk Teleindustri A S 34 Kirke Vaerloesevej DK 3500 Vaerloese Denmark All information contained in this Manual including all drawings specifications data or other material is the property of SKANDINAVISK TELEINDUSTRI SKANTI A S is disclosed in confidence for use only in operating and maintaining the equipment described herein is not to be copied and is not to be used or disclosed for any other purpose without written consent of SKANDINAVISK TELEINDUSTRI SKANTI A S Due to the constant processing of the experience gained during production and operation of our equipment minor modifications may occur relative to the information given in this Manual Whenever practicable corrections will be listed on a correction sheet in the Amendments chapter of this Manual COPYRIGHT 1986 SKANDINAVISK TELEINDUSTRI SKANTI A S SKANTI 23 8000 TECHNICAL TRAINING COURSE TRP 8000 Type Review TRP TRP TRP TRP TRP 8 50 8X51 8X52 8X53 8X54 8X55 8X56 8X57 8X58 so so so so so so so se so T a between 1 6 4 MHz so number y Facility or feature Simplex Duplex
34. Toggling any bit requires confirmation as described for the syntax key 5 Further more PRESET is excluded from the CLEAR RAM function 250 Executable lines 280 Toggle PRESET bit 0 281 1 282 2 283 3 284 4 285 5 286 6 287 7 289 Display PRESET register bits 0 3 in transmitter display bit 4 7 in receiver display All lines will display the resulting PRESET register Pressing 2 or ENTER will restart or terminate second function PRESET bit functions BIT LEVEL FUNCTION 0 Reserved for future use 1 23 2 ME 3 n 5 4 0 Normal 1 Enable Key inhibit 5 0 Normal 1 Disable power display ampere only 6 0 Normal ll Disable ampere display power only 7 0 Normal 1 Complement external scan transitions 4 1 12 7 PAGE 9 29 Controls an 8 bit GUARD register This page can not be entered when GUARD bit 7 is set see following explanation Executable lines 290 Toggle GUARD bit O 291 l 292 2 293 3 294 4 295 5 296 6 297 298 Clear GUARD register 229 Display GUARD register bits 0 3 in transmitter display bit 4 7 in receiver display N All lines will display the resulting GUARD register Pressing 2 or ENTER will restart or terminate second function GUARD bit functions BIT LEVEL FUNCTION 0 Normal 1 Inhibit direct
35. any purposes The results of the tests are displayed on the RX display at the Control Unit The result consists of a test number indicating which test has been perfor med and an error code indicating if the test was OK Please note that the transmitter must be turned ON before executing the self test otherwise the synthesizer exciter and transmitter tests will fail soo G03 fs test error number code The error codes are to be interpreted as follows Error code Meaning 00 The test has passed 01 A malfunction has been detected refer to specific 02 test description for precise information 2 98 Communication error The test failed due to communication error between CU and TU 99 The test can not be executed due to missing options special IF filters etc 8 2 8 4 1 EXECUTION OF SELF TEST IN AUTO MODE The self test is executed by pressing The test will take several seconds during which various sounds may be heard The test will stop when all tests have been executed or the first time an error is detected When the test stops a test number and an error code will be displayed If the error code is 00 no faults has been detected If the error code is different from 00 an error has been detected refer to descrip tion of specific tests for information on the fault and for appropriate tions The test result will be displayed for 10 seconds thereafter the Transceiver will return to normal operation
36. be removed from the chassis for easier access Attention should be paid to CCIR Rec 218 1 which recommends that cables in the vicinity of the receiving antennas or the radio receiving room and cables within the radio room are screened by enclosing them in metal conduits unless the cables themselves are effectively screened The earth connection of the equipment will not cause the battery to be earthed Maximum permissible peak voltage between the battery terminals and earth is 100 V Note that fuses must be provided in the supply leads Installation diagram fig 5 3 shows the necessary cable cross sections and external fuse ratings 5 5 Earth Connections 5 5 1 Antenna Tuning Unit As the earth connection of a transmitter is part of the total antenna system it is of the utmost importance that the earth connection to the Antenna Tuning Unit is constructed to have the lowest possible RF impedance Losses in the earth connection will result in a decrease in radiated power which means that the range of the transmitter vill be reduced In steel ships a 50 x 0 5 mm copper strap as short as possible is connected between the earth terminal at the bottom of the Antenna Tuning Unit and two 1 2 or M12 bolts welded to the superstructure Vessels constructed of non conducting materials must be equipped vith a copper earth plate having a minimum area of 1 square metre mounted below the water line From a copper earth bolt hard soldered to the earth plate a 50 x
37. cond function Read CU program release date and version The receiver display shows release date year month day The transmitter display shows version number Pressing 2 or ENTER will restart or terminate second function Read TU program release date and version The receiver display shows release date year month day The transmitter display shows version number Pressing 2 or ENTER will restart or terminate second function Adjust beeper sound level A continuous control beeping is started Pressing VOLUME UP will increase the sound level Pressing VOLUME DOWN will decrease the sound level Pressing 2 or ENTER will restart or terminate second function preserving the new beeper sound level Switch antenna OFF The antenna and transmitter are switched OFF The power annunciators are turned OFF to identify antenna OFF and transmitter display shows time of day to identify transmitter OFF Finally second function is terminated When TX ON OFF is then pressed both antenna and transmitter are switched ON and power annunciators and transmitter display restored to normal 4 1 12 4 PAGE 5 254 Miscellaneous functions This page can not be entered when GUARD bit 7 is set see second function page 9 Executable lines 250 Clear RAM The function requires confirmation as described for the syntax key 5 All stored frequency pairs and modes the OPTION register and GUARD register will be cleared 0 and second
38. e equipment is important for maximum performance and reliability Antennas and earth connections must be installed with the greatest care using corrosion resistant materials Cable routing shall be made so the cables are protected from physical damage Cable bends especially on coaxial cables may not be sharp and a sufficient number of clips or straps should be used for securing the cables Before installing the equipment make sure that the Configuration PROM is properly programmed see section 5 12 5 1 Mounting the Control Unit The Control Unit can be tabletop or bulkhead mounted Fig 5 1 shows overall dimensions and a drilling plan for the necessary holes The unit is bolted through two holes on the bottom part of the cabinet The unit must be opened when bolting Loosen the two front panel screws and lift off the front panel The front panel is hinged to the bottom part by means of two flexible straps To enable cable entry from either side of the unit the bottom part of the cabinet may be turned 180 degrees relative to the front panel To alter the position open the unit and loosen the screus of the hinges in the bottom part of the cabinet and release the hinges Turn the front panel and fix the hinges in the opposite side of the cabinet bottom Be careful not to damage any components or to drop any conducting objects onto the printed circuit boards of the unit The front panel can be tilted for convenient operation To adjust the angle loosen
39. ersion 248 Adjust beeper sound level 249 Turn OFF antenna 250 Clear RAM 251 Reset system 270 277 Toggle OPTION register bit 0 7 278 Clear OPTION register 279 Read OPTION register 280 287 Toggle PRESET register bit 0 7 289 Read PRESET register 290 296 Toggle GUARD register bit 0 6 297 Set GUARD register bit 7 298 Clear GUARD register 299 Read GUARD register 4 2 DESCRIPTION OF OPERATING CONTROLS es Switches ON OFF the equipment power supply When switched di ON the equipment enters the state it was in just before being svitched OFF li Switches ON OFF the transmitter functions The transmitter NND display shows the transmitter frequency when switched ON and the time of day when switched OFF Increases and decreases the light intensitv in the displavs meters and annunciators 4 21 SCAN TIME DUPLEX TX Storing of receiver transmitter frequency pairs and mode When STO is pressed the receiver and transmitter displays are blanked and their decimal points start flashing indi cating that a channel number 0 75 must be entered in the receiver display via the numeric keys Setting recalling scanning parameters and start stop scan ning of stored receiver transmitter frequency pairs The annunciator is flashing in automatic scanning mode and turned constantly ON in manual scanning mode for details see section 4 1 Setting time of day setting recalling
40. h Finally the ALC voltage is compared in IC42 5 6 with a ramp voltage generated by the ALCHOLD REGISTER and the corresponding DAC 16024 When the two voltages equals the ramp is stopped and switch IC44 10 11 is closed The ALC voltage is now constant generated by the ALCHOLD REGISTER and thereby the gain of the Transmitter Signal Path is independent of the modulating signal When MEDIUM POWER is selected the ALC voltage generated by the ALCHOLD REGISTER is increased by 0 93 V In LOW POWER a 14 dB attenuator placed on the Power Amplifier Assembly 626 controlled by PAATT is activated and the ALC voltage is equal to the Full Power preset value 6 5 2 Protection Circuits 6 5 2 1 Power Amplifier Protection The Power Amplifier Protection can be divided into two main groups SWR protection and thermal protection The SWR protection contains a reflected power and output voltage detector placed at the output of the Power Amplifier Assembly 626 The output of the detector PAPEAK is connected to the Transceiver Control Boardi 624 PL2 7 and is OR ed together with the FILPEAK voltage from the P A Filter Assembly 627T628 or 6239 Nov if the SWR at the output of the Pover Amplifier Assembly 626 increases during a transmission an error voltage is generated at IC42 1 exceeding the voltage generated by the ALCHOLD REGISTER thereby increasing the ALC voltage and reducing the output power within 1 ms to a permissible level The outp
41. hese boards are located in the door of the unit The cabinet itself contains a Switched Mode Power Supply which converts the battery voltage to a stabilized 48 V voltage supplying the Power Amplifier and the Voltage Converter 621 The Voltage Converter produces various supply voltages necessary in the equipment and provides galvanic isolation from the battery Supply voltages signal and control voltages are distributed via the Interconnection Board 620 to external units and to the Transceiver Control Board 624 which performs the central control of the Transceiver Unit The exciter output signal from the Rx Tx Assembly is routed to the Power Amplifier 6261 the output from which is filtered by the harmonic filters P A Filters 627 or 628 629 6 3 ANTENNA TUNING UNIT The ATU consists of a Tuning Network a Measuring System and a Microprocessor Part During the tune sequence a 6 dB Attenuator is switched in to keep the load of the Power Amplifier at approx 50 ohms The MPU will set up the Tuning Network to give the best obtainable SWR on basis of the measuring system The Tuning Network comprises Capacitor Bank I Capacitor Bank II and an Inductor Bank With these it is possible to form either L or a pi matching network The capacitor Banks and the Inductor Bank are built up by binary related capacitors respectively binary related coils The setting of the Capacitors and Coils is accomplished by relays 6 1
42. is ON a speech signal with a signal to noise ratio greater than a certain value is re quired to pass the signal through the receiver AF ampli fier The Squelch is used to eliminate noise when there is no speech signal on the receiver frequency The Squelch Board is optional When not installed pressing the key causes no action 4 24 RATE gt v TUNE TUNE Selects frequency step in receiver tuning An annunciator below one of the three right hand digits of the receiver display indicates the frequency step selected 10 Hz 100 Hz and 1000 Hz steps are possible Tuning of receiver frequency up or down in frequency steps selected by the TUNE RATE key see section 4 1 va Adjustment of the BFO frequency down and up in CW mode Receiver display shows BFO frequency when either of the keys are pressed e e Selects respective IF filters in CW and MCW mode Annunciator ON indicates selected USB filter Selecting transmission of J3E and reception of J3E and R3E Signals in USB Upper Side Band Annunciator ON indicates USB mode selected Selecting transmission of J3E and reception of J3E and R3E signals in LSB Lower Side Band Annunciator ON indicates LSB mode selected If transmission of LSB is illegal and transmitter is ON the transmitter display is flashing and transmitter function disabled Selecting transmission of H3E Upper Side Band and recep tion of H3E and signals Annunciator ON indicates AM
43. kHz 400 kHz 7 uV 400 kHz 30 MHz 5 uV CW 500 Hz High impedance antenna 100 kHz 400 kHz 6 5 uV 400 kHz 4 MHz 2 uV 50 ohm antenna 100 kHz 30 MHz 0 6 uV When RF AMP is selected the sensitivity is increased by 5 dB 94 dBuV per signal more than 30 kHz offset from receiver frequency produces less than equivalent input signal of 30 dBuV 50 ohm antenna Unwanted signal of 105 dBuV 30 400 Hz more than 20 kHz offset from receiver frequency produces cross modulation less than 30 dB relative to a wanted Signal of 60 dBuV SSB 50 ohm antenna More than 80 dB to cause a 3 dB change in output power when wanted signal gives 20 dB SINAD and the unwanted signal is offset by more than 20 kHz from the receiver frequency Greater than 80 dB Greater than 80 dB Greater than 80 dB below 4 MHz Greater than 70 dB above 4 MHz Less than 5 dB SINAD SSB Less than 20 pW 50 ohm at antenna connector 3 3 RF Amplifier 0 dB or 10 dB RF Attenuator 0 dB or 20 dB Automatic Gain Control Static Less than 5 dB change in output for 100 dB input signal variation from 20 dB sensitivity level SSB Dynamic 70 dB signal change SSB CW MCW TELEX fast only Attack time 150 us Debounce time 10 ms Hold time Fast 100 ms Slow 2 5 s Decay time Fast 400 ms Slow 1 5 s AM Attack time 150 ms Decay time 300 ms BFO optional 3 kHz synthesized in 100 Hz steps Line output Internally adjus
44. lay Board 641 this transformer is built in The receiver is normally delivered to 50 ohms input impedance In the frequency range below 4 MHz it is possible to change the input to high impedance which can be advantageous when using a short receiving antenna with no impedance matching transformer and a short feed in selection of high input impedance in the range below 4 MHz is carried out by means of a soldering iron by moving the strap from L to H in the desired frequency range Below figure shows a section of PCB 610 uith all straps set to lov impedance 50 ohms 5 5 lt 405 kHz 1 6 4 MHz 527 1600 kHz 405 527 kHz 5 7 Interconnection of Units 9 7 1 Control Unit to Transceiver Unit connections The units are interconnected by a length of 16 x 0 5 mm sq screened multiwire cable max 100 metres In order to connect the cable to the Control Unit the front panel is removed The cable is entered through the threaded cable entry and the wires are then connected to the terminal strip marked 601TS2 Transceiver Unit NOTE Wire ends should be fitted with cable end sleeves before mounting The screen is connected to the ground frame at the cable entry To connect the cable to the Transceiver Unit the front must be opened The cable is entered through the cable entry at the back of the unit and the wires are connected to the terminal strip marked 62
45. mand Reserved commands OOh Od Reset The TRP 8250 S will run the power up sequence 14h 20d Frequency input The next 4 words will be interpreted as a fre quency 5 8 Frequency words Status word After a frequency command 4 words are used to specify the frequency in packed BCD 1 10 MHz 1 MHz 2 100 kHz 10 kHz 4 l kHz 100 Hz 4 10 Hz 0 After having received the frequency command and all four frequency vords the TRP 8250 S transmits a status word having the folloving format Bit 7 Interface error When set to l this bit identifies either a parity framing overrun or data format error The command cycle must be repeated 6 Always 0 2 Busy When set to 1 this bit identifies that the TRP 8250 5 is not ready The command cycle must be repeated 0 4 Address echo This field contains the five LSB s of the received address vord 2 12 CONFIGURATION PROM PROGRAMMING The Configuration Prom contains 4 kbytes in which legal frequencies frequency bands and special system parameters can be programmed for customizing the equipment Legal frequencies and frequency bands are stacked in the lower part of the Prom together with legal modulation beginning at Prom address 0 and progressing upward in 4 byte steps until a limiter byte containing the data 255d FFh are located Special system parameters are stacked in the higher part of the Prom beginning at Prom address 4095d FFFh progressing downward
46. n The antennas should be erected well in the clear away from any objects whose influence on the antenna may vary such as derricks etc Insulators should be of the best type having low leakage even when wet Stays wires steel masts etc should be either effectively earthed or insulated The receiving antenna should be kept as far as possible from electrical equipment in order to minimize noise Electrical installation such as cable braiding screens and instruments in the vicinity of the receiving antenna should be earthed effectively and the instruments in question should be fitted vith noise interference suppression devices effective in the range 0 1 MHz to 30 MHz 2 6 1 Transmitter Antenna The Antenna Tuning Unit will tune on any frequency in the range 1 6 to 30 MHz to vire and or whip antennas of 7 to 18 metres total length A long antenna is preferable with regard to radiated power The antenna is terminated at the insulator at the top of the Antenna Tuning Unit The insulator must be relieved from mechanical stress by using max 1 metre flexible vire between the insulator and a support 9 6 2 Receiver Antenna Length 7 30 m The antenna feed in should be coaxial cable he receiver antenna terminal is a UHF connector PL 259 type located in the Transceiver Unit If a long cable is used an impedance matching transformer should be inserted at the antenna end of the feeder In one antenna installations using the optional Antenna Re
47. n MCW mode above 1605 kHz Disable 500 CW MCW FILTER and BFO kaya Enable Any other dts are T 255d FFh AGC and Sensitivity Disable AGC and pu Enable Any other data are derauived 255d FFh RF Amplifier and Antenna Attenuator Disable RF AMP and ANT ATT kola Enable Any other data are to 255d FFh Alarm Disable 500 2182 and ALARM Enable Anv other data are 255d FFh R3E Disable R3E key Enable Any other data are defaulted to 255d FFh LSB Disable LSB key Enable Any other data are defaulted to 255d FFh SCAN Enable SCAN key Disable Any other data are defaulted to 255d FFh 5 13 4085d FF 5h 4084d FF 4h 4083d FF 5h 4082d FF2h 4081d FF 1h 4080d FFOh 4079d FEFh 4078d FEEh 4077d FEDh 4076d FECh 210d D2h 255d FFh 6d 06h 255d FFh 2d 02h 255d FFh 195d C3h 255d FFh 180d B4h 255d FFh Od OOh 255d FFh 32d 20h 255d FFh 22d l h 255d FFh 210d D2h 255d FFh 32d 20h 255d FFh Fast AGC amp Slow AGC Enable AGC SLOW and AGC FAST keys Disable Any other data are defaulted 2 255d FFh LSB Transmitting Enable transmitter in LSB mode Disable Any other data are defauited to 255d FFh H3E Transmitting enable transmitter in H3E mode disable Any other data are Saraulted to 255d FFh VERY NARROW FILTER
48. nd 4 MHz Output power reduced to 150 W when the transmitter frequency is between 1 6 and 4 MHz No output power reduction Any other data are defaulted to 255d FFh 5 15 4072d FEBh External scan control D7 D6 D5 D4 D3 D2 DI DO dis RX TX dis tran 418 dis tran able keys able sition able sition able sition V V V V Master Start Disable Transition 0 enable 0 high to low 1 disable 1 low to high RX TX keys 0 enable use of RX key to enable external scan and TX key to disable external scan 1 disable use of keys to control external scan 0 enable use of external scan 1 disable external scan and neglect 06 DO 2 12 5 STANDARD PROGRAMMING The following lists apply to SKANTI standard programming of special system parameters for each type unless otherwise agreed ref Factory programming of Configuration PROM Only data different from 255d FFh are listed 5 16 ee ADDR 4092d FFCh 4086d FF6h 4072d FE8h 4094d FFEh 4092d FFCh 4086d FF 6h 4072d FE8h 4094d FFEh 4086d FF 6h 4085d FF 5h 4072d FE8h 4094d FFEh 4092d FFCh 4086d FF 6h 4072d FE8h 4094d FFEh 4092d FFCh 4089d FF9h 4088d FF 8h 4086d FF6h 4084d FF4h 4083d FF 3h 4072d FE8h 4094d FFEh 4089d FF9h 4086d FF6h 4085d FF 5h 4084d FF4h 4083d FF 3h 4072d FE8h 4094d FFEh 4092d FFCh 4091d FFBh 4090d FFAh 4089d FF9h 4088d FF8h 4086d FF 6h 4084d FF4h
49. nd the output power is reduced by 5 dB SETPOINT voltage 4 36 V ALCHOLD voltage increased by 0 82 V relative to Full Power preset value 6 5 2 3 Reduced Power Indication In case of 5 dB reduced power condition due to thermal protection the annunciator Reduced Power on the Control Unit front panel is lit The annunciator Reduced Power will also turn on if the average power in a full power transmission exceeds the peak power minus 3 dB during one minute In this condition the power is reduced by 3 dB 6 4 7 PREVENTIVE MAINTENANCE Due to the modern design of the TRP 8250 preventive maintenance can be reduced to a minimum provided the equipment is correctly installed To ensure maximum performance and minimum repair trouble we recommend you to follow below stated headlines for preventive maintenance 1 The condition of the battery should be checked at frequent intervals The battery must always be fully charged and should be topped up frequently with distilled water liquid should be 5 to 10 mm above the plates Check the condition of antenna installation ground connection and cables at regular intervals Keep antenna feed through insulators clean and dry Ensure that no objects are obstructing the free airflow through the cooling fins at the back of the Transceiver Unit and keep the units free of dust accumulation to prevent overheating 7 1 Realignment of Master Oscillator The Master Oscillator fre
50. neral Purpose SSB Radiotelephone Free frequency selection all bands As type TRP 8254 S but simplified keyboard Marine SSB Radiotelephone Free frequency selection all bands CW and MCW facilities Marine 558 Radiotelephone Free frequency selection all bands Automatic reduction of power below 4 MHz FCC version 3 TECHNICAL DATA Versions complying with the SOLAS 74 convention and the ITU Radio Regulations are available meeting one or more of the specifications CEPT MPT FCC DOC and FTZ 3 1 GENERAL Frequency Generation Frequency Selection Frequency Presentation Frequency Stability Operating modes Operating Temperature Range Full Performance Temperature Range True digital frequency synthesis By common keyboard Single key selection of 2182 kHz TRP 8250 S 8251 5 8252 S 8253 S 76 user programmable frequency pairs Scanning facilities may be disabled Remote control optional Separate LED displays for receive and transmit frequencies 1 5 ppm 0 8 ppm optional 0 4 ppm optional Semiduplex and simplex USB J3E upper sideband suppressed carrier R3E Upper sideband reduced carrier AM H3E upper sideband full carrier LSB J3E lower sideband suppressed carrier optional CW 1 morse telegraphy TRP 8252 5 8255 S MCW 2 modulated morse telegraphy TRP 8252 S 8255 5 TELEX F1B with center audio frequency selectable between 1500 and 2500 Hz in
51. ons with long earth straps to the Antenna Tuning Unit high RF voltages may be present on the ATU ground terminal To avoid this voltage being coupled to the Transceiver Unit the interconnection cables must be run from the Transceiver Unit to the point where the copper strap from the Antenna Tuning Unit is connected to earth From this point the cables must follow the copper strap to the Antenna Tuning Unit The cables should be placed upon the center of the copper strap to ensure good coupling The part of the cable run between earth and the Transceiver Unit must not be run in parallel with the earth strap within a distance of at least 1 metre 9 8 Connection of External Equipment Auxiliary terminals in the Control Unit and the Transceiver Unit allows various external equipment to be connected to the TRP 8250 S In tables 5 2 and 5 5 terminal assignments are listed for the Control Unit and the Transceiver Unit respectively Screened cable should be used with the screen connected to ground frame or chassis 9 8 1 Timing of TELEX KEY signal The transmitter pre keying time should be approx 7 ms not less Telex modems with programmable pre keying time must be programmed to this value In case of telex modems with a fixed pre keying time longer than 7 ms a time delay may be introduced by the TELEX KEY DELAY circuit on 601 the Control Unit The leading edge of the TELEX KEY signal may be delayed by up to 30 ms in steps of 5 55 ms by
52. quency should be checked at least once a year The Master Oscillator determines the exact transmit and receive frequencies of the equipment The oscillator tends to age very slowly with time typically with the highest drift rate the first year The check should be performed by a qualified technician with the necessary test equipment at his disposal 1 Dig Measuring Equipment 1 1 Frequency Counter Frequency range gt 100 MHz Input impedance 50 ohm Sensitivity at least gt 0 2 V Accuracy better than 1 Hz 1 2 Thermometer Range 0 50 deg Centigrade Preparations 2 1 Switch on the power at least 30 minutes before adjustment 2 2 Remove the front shielding cover of the RX EX Assembly 2 3 Open the front door of the Transceiver Unit and disconnect all sockets from the shielding cover of the Master Oscillator Remove the shielding cover by unscrewing the 4 screws 7 1 2 4 Note if the TCXO is marked with a frequency offset 2 5 Connect all sockets again 2 6 Measure the temperature close to the Master Oscillator and take the necessary arrangements to keep it between 20 and 30 deg Celsius Be sure that thermal equilibrium has taken place before adjustment 3 Realignment of Master Oscillator 3 1 Disconnect the socket from PL2 on the RX EX Signal Path 610 lcarrving the injection signal to the Ist mixer Connect the frequency counter to the socket 3 2 Key in USB mode and a receiver frequency of 26 68000 MHz on the Control
53. r frequency the AGC should always be ON to ensure that a suitable start level of IF amplifier gain is set before the AGC is switched OFF for manual ad justment Selects AGC time constant that is the rate at which gain is regulated Annunciators indicate whether AGC SLOW or AGC FAST is selected AGC SLOW is automatically selec ted when switching to the modes SSB R3E or MCW AGC FAST is automatically selected when switching to the modes AM TELEX or CW The settings selected by the system are sumed to give the best reception in the modes concerned but under special circumstances a better reception might be obtained by pressing AGC FAST if AGC SLOW were selected and vice versa In the AM and the TELEX mode only AGC FAST is possible Switches ON OFF internal and external loudspeaker Annunci ator ON indicates loudspeaker s ON If headphones are connected via the socket on the rear of the Control Unit the internal loudspeaker is always switched OFF Increases receiver gain 10 dB by activating the RF ampli fier stage Annunciator ON indicates RF amplifier ON The RF amplifier may be used when the received Signal is weak Decreases receiver gain 20 dB by inserting the antenna input attenuator Annunciator ON indicates attenuator ON The antenna attenuator may be used if the received signal is disturbed by strong out of band signals Switches ON OFF Squelch function Annunciator ON indicates Squelch ON If the Squelch
54. s pressed by mistake ENTER will terminate second function mode Press a number The number is passed to the receiver display This number identifies the second function page If the number was pressed by mistake ENTER will terminate second function mode Press a number The number is passed to the receiver display This number identifies the second function line If the number was pressed by mistake 2 will restart the second function mode Press ENTER If page and line numbers are not valid the receiver display starts flashing and the second function mode can be either restarted by pressing 2 or terminated by pressing ENTER If both page and line numbers are valid the respective second function is executed and if no further keys are required in the specific function the displays are restored to the state prior to second function execution Most second functions require additionally keys to be pressed Typically 2 will restart second function mode and ENTER terminate it Some second functions require confirmation via the STO key This situation is indicated by a special warning display flash shifting between 1111211 and the entered number Pressing STO will execute the function 2 will restart the second function mode and any other key will terminate it Second functions requiring confirmation 250 251 278 280 298 Clear RAM Reset system Clear OPTION register 287 Toggle PRESET register bit
55. state the receiver display shows the receiver frequency in kHz A flashing decimal point indicates that entering storing or recalling of a receiver frequency or channel number has not yet been terminated Flashing digits indicate that the frequency or channel number is outside the specified range 4 27 4 2 3 Signal Strength meter Gives a relative indication of the signal strength in the received signal 4 2 4 Output pover Antenna current meter Measures the antenna current during transmission on 2182 kHz and 500 kHz as indicated by the antenna current annunciator Gives a relative indication of the transmitter output power during trans mission on other frequencies by measuring the output peak voltage current as indicated by the output power annunciator A flashing meter indicates a fault in the Transceiver Unit Antenna Tuning Unit communication 4 2 5 Output power annunciator Also serves as a mismatch indicator on all frequencies If the input SWR of the Antenna Tuning Unit exceeds 1 3 the output power annunciator starts flashing indicating that tuning is required 4 2 6 Reduced power If the temperature of the Power Amplifier heatsink and or the Antenna Tuning Unit exceeds their maximum levels the output power is reduced by 5 dB which is indicated by the reduced power annunciator This may occur due to extreme environmental and or working conditions 4 28 5 INSTALLATION Correct installation of th
56. table up to 10 dBm 600 ohm In band Intermodulation Less than 50 dB Audio Output Power 5 W in 8 ohm to internal and or external loudspeaker 3 3 TRANSMITTER CHARACTERISTICS Output Power 250 W PEP 0 1 4 dB from Transceiver Unit into 50 ohms Power Reduction Medium approx 60 W PEP Low approx 10 W PEP Single tone max Power 250 W PEP for keying duty cycle less than 55 and modulation rates greater than 3 baud 3 dB power reduction when continuously keyed during 1 min Automatic power recovery when muted during 2 min 3 4 Transmitter Frequencies Spurious Emissions Alarm Generator Audio Input Level 3 4 ANTENNA TUNING UNIT Frequency Range Antenna Requirements Antenna Tuning Tuning time TRP 8250 S Up to 1017 programmable channels freely distributed in the ranges 1606 5 to 4800 kHz 6200 to 8950 kHz 12230 to 17650 kHz 18780 to 27100 kHz TRP 8251 S 8252 S Free frequency selection in 100 Hz steps in above ranges TRP 8255 S 8254 S 8255 S Free or programmable frequency selection in the range 1606 5 kHz to 30 MHz TRP 8250 S 8251 S 8252 S Less than 43 dB PEP TRP 8253 S 8254 S 8255 S Less than 62 dB PEP A two tone alarm generator is incorporated TRP 8250 S 8251 S 8252 S Telex 0 dBm 10 16 dB Input impedance 600 ohm Aux 0 dBm 10 16 dB Input impedance 600 ohm Mic 20 mV to 2 5 V internally adjustable Input impedance 100 kohm 6 8 nF Recommended source
57. test alarm The alarm signal is heard in the loudspeaker and transmitter keying is disabled If the Dummy Load option is installed the alarm generator and the transmitter is tested on the built in dummy load of the Antenna Tuning Unit The Antenna Current Meter indi cates current into the dummy load The Output Power and Antenna Current annunciators are flashing to show that the transmitter is in the test mode Test on dummy load cannot be performed on 2182 kHz Press the left and right keys simultaneously to send alarm The alarm signal is heard in the loudspeaker and transmitted for 45 sec on the selected frequency if the transmitter is ON The alarm signal may be interrupted by pressing STOP ALARM 4 2 1 Transmitter Display In its initial state the transmitter display shows the transmitter frequency in kHz if TX is ON or the time of day in hours and minutes if TX is OFF Time of day is indicated by a flashing time cursor 3rd digit A steady time cursor indicates that entering or recalling of time has not yet been terminated A flashing decimal point indicates that entering storing or recalling of a transmitter frequency has not yet been terminated Flashing digits indicate that the transmitter frequency and or mode is unauthorized i e the frequency is outside the specified range and or not contained in the frequency PROM The transmitter cannot be keyed if the transmitter display is flashing 4 2 2 Receiver Display In its initial
58. the tuo front panel screus and open the unit Move the tuo stop pins in each side of the unit to the appropriate holes and refit the front panel 5 2 Mounting the Transceiver Unit The Transceiver Unit may be mounted up to 100 metres from the Control Unit using a screened 16 x 0 5 mm sq multiwire cable for interconnection The unit should be installed in a dry place and consideration should be given to accessibility for servicing The brackets supplied allow for bulkhead or bench mounting Fig 5 2 shows mounting details It is important to provide plenty of airspace below and above the unit for adequate air circulation through the heatsink at the back of the unit 5 3 Mounting the Antenna Tuning Unit The Antenna Tuning Unit may be mounted up to 100 metres from the Transceiver Unit using RG 213 U RG 8A U coaxial cable and a screened 16 x 0 5 mm sq multiwire cable for interconnection The unit should be installed near the antenna feed point Fig 5 3 shows mounting details 5 4 Power Supply The TRP 8250 S operates at voltages between 10 6 and 41 6 VDC and is to be powered from a 12 24 or 32 volt battery or from a separate AC Power Supply Unit The supply leads are connected to the Transceiver Unit through the cable entry at the rear of the cabinet The supply terminal strip is adapted for screened power supply cable as required by some administrations The screen of the cable is connected to the center terminal The terminal strip may
59. ut of the reflected power and output voltage detector is also used to make an independent local protection of the Power Amplifier by activating the 14 dB attenuator if the detector voltage exceeds 10 V This ensures fully protection of the Power Amplifier if the ALC loop should be faulty or disconnected To reset the attenuator it is necessary to turn off the main power of the transceiver in a few seconds The thermal protection consists of two thermoswitches mounted on the heatsink of the Power Amplifier Assembly and an average peak power detector One thermoswitch is activated if the heatsink temperature exceeds 100 deg C Thereby logical signal 1 fed to the Transceiver Control Board 624 PL2 5 goes low and the output power is reduced by 5 dB This is carried out by changing the reference voltage from the SETPOINT REGISTER to 4 36 V and increasing the voltage from the ALCHOLD REGISTER by 0 82 V relative to the Full Pover preset value The other thermosvitch is activated if the temperature of the heatsink exceeds 110 deg C In this case the supply voltage to the preamplifier is cut off The average power and the peak power are compared in IC41 3 2 If in a Full Power transmission the average power exceeds the peak power minus 3 dB the logical signal at 1041 1 goes high If this condition has been present during one minute e g by transmitting CW with continuous key doun or broadcast mode telex the output power will be reduced by
60. x cable from the Power Amplifier and release the cable Unscrew PCB 610 and remove it from the RX EX Assembly Locate position X4 on the PCB Mount the telex filter in that position and solder the terminations Refit the PCB in the reverse order Fitting the filter on position X4 automatically enables the TELEX key on the Control Unit front panel and the function may now be checked 2 11 REMOTE FREQUENCY CONTROL TRP 8250 S is equipped with a serial interface for remote telex operation That is the receiver and or transmitter frequencies may be remote controlled whereas telex mode will be automatically selected The remote control terminals are the 601151 Auxiliary Terminals no 1 to 4 see Table 5 2 The interface when used has to be enabled by the appropriate Configuration PROM programming see section 5 12 PROM addr FEDh 4077d MARITEX The interface circuit conforms electrically to the EIA standard RS 232C using the folloving Baud rate 2400 bps Parity Odd Word length 8 bits Start bits i1 Stop bits D 5 11 1 DATA FORMAT Address word This word when transmitted to TRP 8250 S initiates the command cycle To identify the address vord bits 6 and 7 shall both be set to 1 Thus any other word types used vill have to be less than COh 192d Reserved addresses C2h 194d Receiver C3h 195d Transmitter FFh 255d Broadcast Command word The word immediately following the address word contains the com

TRP 8400 D

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