Model 5500 Receiver Model 5700 Transmitter User`s
Contents
1. B Fully remove the batteries in the holder C Install the new batteries and reinstall the lid and screws NOTES If the 5500 Receiver will be operated for periods of greater than 6 hours it is recommended that the AC DC adapter be connected to the unit The AC DC Adapter should only be used while the rechargeable batteries are present in the unit Do not attempt to use the adapter when disposable batteries are installed in the unit 3 0 Making Path Loss Measurements The Model 5500 Receiver measures absolute signal strength of CW signals at the antenna input port Relative path loss measurements can easily be made by selecting a reference location and then moving the receiver to different locations while noting the change in received signal strength To measure actual path loss the user must take into account the gain of the antennas being used on both the transmitter and receiver and the output power of the transmitter The Model 5500 Receiver is a single conversion receiver with an intermediate frequency of 90MHz Because of the bandwidth of the SAW filter there is very little attenuation of signals in the adjacent channel 30 kHz Signals that are 60kHz from the receiver frequency ate attenuated by more than 40dB Because of this limitation the user should not conduct tests in a channel adjacent to a strong signal When using the receiver with the Model 5700 Transmitter the following procedure can be used to setup the e2. key to turn the unit on The display will indicate the receiver status OFF Press the CTRL and OFF keys simultaneously to turn the unit off Press the CTRL and BAND keys simultaneously to toggle the receiver between BAND the low and high bands The display will indicate the active band and the last tuned frequency in that band Press the CTRL and FREQ UP ARROW keys simultaneously to increment the FREQ receiver frequency up by one step If these keys are held for more than 2 second the frequency will be changed at 10 times the rate allowing rapid slewing across the band CTRL and FREQ DN ARROW moves the tuned frequency down LIGHT Press the LIGHT key to toggle the display backlight on and off CTRL This key is used in conjunction with certain other keys to help prevent accidental activation F1 Reserved F2 Press the CTRL and F2 keys simultaneously to put the receiver in TX Program Mode Received Signal Strength Synthesizer Lock Status Receiver Frequency Battery Charge State Active Band Indicator Function Received Signal Strength Indicates the signal strength of the channel the Receiver is currently tuned to receive Receiver Frequency Indicates the frequency of the channel the Receiver is tuned to receive Active Band Indicates the active frequency band Synthesizer Lock Status Indicates the lock
3. 1930 02 120 1960 02 66 4 1989 9 120 859 3 728 875 110 8 894 113 5 waa aC 1960 02 81 9 1989 9 a20 W Sheet1 a Pei The data that was gathered from the receiver is now stored in an Excel workbook It can be saved by accessing Fie Save As in Microsoft Excel Using Frequency Bank The Frequency Bank option allows the user to select up to six frequencies to monitor Each time the Scan button is selected readings are taken and can then be logged to an Excel file A user label tag is used to identify the corresponding scan location GPS information see section 2 3 and time stamp can also be implemented cca CPCS fs Feo iov E Enabled O 0 s fitep 2aKHe j Jesa Step 30H2 Z Cca CPCS fioo Senza E e Ered O 0 Cra ces foe iea EP emea 0 EE F 20 A combination of high band and low band frequencies can be monitored in the Frequency Bank To enable a frequency for monitoring the box to the left of the step size must be checked Once the box is checked the label will read Enabled and the indicator will change to green When the SCAN button is selected each enabled channel is scanned once and the measured signal strength is displayed A label can be added to each scan to help identify the location or other information important to the scan Once your label has been entered the data can be appended to the active log file by selecting the LOG TO FILE button If the LOG TO
4. 8 Stop bits 1 Parity none Comm port whichever one cable is plugged into on PC laptop Local echo ON Select line feed LF after carriage return CR when receiving The settings may be found various places depending on the terminal emulation software used generally check the Serial Port and Terminal configuration menus 14 8 2 Power up the unit with the slide switch on the front of the Battery Box The software will respond RDY if the communications channel is operating correctly You can verify the current settings at any time by typing HELP A summary of commands is displayed The current synthesizer frequency is stored in non volatile memory When power is applied to the synthesizer it will return to the last entered frequency Set up the synthesizers following the recommended sequence Set the frequency in MHz FR XXXX yyyy lt CR gt Verify the transmitter is enabled TX lt CR gt Verify the frequency is locked LD lt CR gt If the LED beside the band select switch is illuminated the synthesizer is locked and transmitting See Section 9 0 for a complete listing of all commands and error codes If desired connect the RF OUT to power meter or spectrum analyzer to adjust the output level Alternatively the Model 5500 Receiver can be used to adjust the output See the procedure described in Section 3 0 Disconnect serial cable the transmitter is ready for operation Programming Through the Model 5500 Rec
5. FILE button is not selected the data from the scan will not be saved An example of an Excel log file is shown below 773 120 120 120 56 4 120 728 110 8 113 5 120 81 9 120 78 115 7 113 9 120 90 120 B14 115 9 119 120 92 9 120 Front Door Front Door Front Door Front Door Front Door Front Door Street Ent Street Ent_ Street Ent Street Ent Street Ent Street Ent South Bldg South Bldg South Bldg South Bldg South Bldg South Bldg Back Door Back Door Back Door Back Door Back Door Back Door 12 39 38 12 39 39 12 39 39 12 39 39 12 39 39 12 39 39 12 45 32 12 45 32 12 45 32 12 45 33 12 45 33 12 45 33 12 46 38 12 46 38 12 46 39 12 46 39 12 46 39 12 46 39 12 47 28 12 47 28 12 47 28 12 47 29 12 47 29 12 47 29 4019 0202 N 4019 0202 N 4019 0202 N 4019 0202 N 4019 0202 N 4019 0202 N 4019 0278 N 4019 0278 N 06620 9750 W 08820 9750 W 08820 9750 W 08820 9750 W 08820 9750 W 108820 9750 W 08820 9711 W 08820 9711 W 4019 0278 N 4019 0278 N 4019 0278 N 4019 0278 N 4019 0213 N 4019 0213 N 4019 0213 N 4019 0213 N 4019 0213 N 4019 0213 N 4019 0213 N 4019 0213 N 4019 0213 N 4019 0213 N 4019 0213 N 4019 0213 N 08620 9711 W 08820 9711 W 08820 9711 W 08820 9711 W 08820 9672 W 108620 9672 W 08820 9672 W 08820 9672 W 08820 9672 W 08820 9672 W 08620
6. onto one end Plug the other end into the receiver 4 Plug the TX adapter into the appropriate connector depending on switch position set in step 2 The low band and high band transmitters are two independent units so if a low band frequency is to be programmed the switch on the transmitter must be in the down 15 9 0 position If a high band frequency is to be programmed the switch must be in the up position Polling the Transmitter The user can poll or query the transmitter for its current frequency setting Press CTRL and F2 simultaneously The receiver will display TX PROGRAM MODE and the current frequency setting for the transmitter If the transmitter is already set on the desired frequency exit the program mode by pressing CTRL and F2 simultaneously Programming To change the broadcast frequency of the transmitter change the receiver frequency press CTRL and an arrow key simultaneously The first time you press the CTRL and arrow combination the transmitter and receiver are now set to the same frequency Subsequent CTRL and arrow key combinations will increase or decrease the frequency setting in both the receiver and transmitter To exit from this mode press CTRL and F2 again Now the receiver frequency can be changed with no effect on the transmitter Precautions The transmitter could lock up if given incorrect data very quickly This affects operati
7. or the high band antenna ports on the receiver The modular plug of the supplied serial cable should be connected to the receiver while the 9 pin DSUB connector should be connected to a free comm port on the PC Connecting to the Receiver Click on File Connect Receiver This action will bring up the connection form If the comm port hooked up to the serial cable is not labeled on the outside of the computer then try Commi first If this port is already in use or does not exist an error message should result when attempting to open it Connecting optional GPS support RXScan is compatible with the NMEA GPS sentence structure RXScan processes the GPRMC output string used with the NMEA format To use the GPS ability of RXScan do the following 1 Configure your GPS to put out NMEA data at 4800 baud 2 Connect the serial port of the GPS to a free COM port on the host PC 3 Select File Connect GPS When the Open COM port dialog box appears enter the COM port number that the GPS is attatched to and click OK The Latitude and Longitude labels on the Frequency Bank tab should now update once every second If the GPS has not acquired a fix the labels should display Getting Fix Once valid data is received the labels should show the latitude and longitude 18 3 0 RXScan was tested with Garmin s eMap GPS With the Garmin eMap GPS it can be configured for indoor use where it outputs the last known latitude and longi
8. the lid e Carefully remove the batteries in the two holders e Remove the shorting jumper installed between pins 1 and 2 on JP1 and reinstall the jumper between pins 2 and 3 on JP1 e Reinstall the lid and screws e The external wall adapter will now be the sole power source for the Battery Box and attached synthesizers Programming the Synthesizers The procedures for programming either the low band or high band synthesizer are identical It is expected that procedures will remain the same for synthesizers to be developed for other frequencies 8 1 Programming Through a PC The synthesizers can be programmed via a PC or embedded controller Procedures in this section describe setup of synthesizers with a PC or laptop computer as the host interface The synthesizers are programmed using simple ASCII commands from a terminal program See Appendix A to program the transmitters with the RXScan software Select the correct frequency band with the slide switch on the front of the Battery Box Install the serial cable between a serial port on the PC laptop and the serial port on the appropriate synthesizer Verify that the cable harness between the Battery Box and the synthesizers is properly installed The 15 pin connector goes in the PWR DATA port in the Battery Box and the two 25 pin connectors plug into the synthesizers Start the terminal emulation software and setup with the following parameters Baud rate 9600 Data bits
9. 9597 W 08820 9597 W 21 5 0 Programming the Model 5700 Transmitter The RXScan Software can program the Model 5700 Transmitter The transmitter should be turned on A serial cable should be connected to the appropriate serial port on the transmitter and to a free comm port on the PC Click on the Transmitter tab near the top of the program window After clicking on this tab a message window should appear reminding the user that the communications cable needs to be disconnected from the receiver and connected to the transmitter The transmitter interface simply sends commands to the transmitter displaying the command and the resulting answer in the Communications window adjacent to the main program window 6 0 Transmitter Frequency Selection To change the transmitter frequency select the desired frequency from the transmitter box and push the Send button Be sure that the correct band is selected on the transmitter 22
10. PRAXSYM Model 5500 Receiver Model 5700 Transmitter User s Manual February 6 2002 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 TABLE OF CONTENTS Overview of Model 5500 Receiver Operation of Model 5500 Receiver 2 1 Control and Indicator Description 2 2 Battery Charging 2 3 Operation with AA Dry Cells Making Path Loss Measurements Controlling the Receiver Remotely Definition of Receiver Commands and Error Codes Overview of Model 5700 Transmitter Operation of Model 5700 Transmitter 7 1 Control and Indicator Description 7 2 Battery Charging 7 3 Operation with AA Dry Cells 7 4 Operation with External Power Source Programming the Synthesizer 8 1 Programming Through a PC 8 2 Programming Through the Model 5500 Receiver Definition of Transmitter Commands and Error Codes Appendix A RXScan Software page 3 page 4 page 4 page 5 page 6 page 7 page 7 page 8 page 11 page 11 page 11 page 13 page 13 page 14 page 14 page 14 page 15 page 16 page 18 1 0 MODEL 5500 DUAL BAND SIGNAL STRENGTH RECEIVER USER MANUAL Overview of Model 5500 The Model 5500 Signal Strength Receiver is a portable dual band receiver that measures the strength of an RF signal The receiver is capable of measuring signal strengths from 20dBm to 120dBm The frequency and signal strength are displayed on the LCD display on the front panel or can be monitored remotely over an RS232 interface The receiver and t
11. area may alternate between displaying the normal battery bar and the message CHARGING During this time the charging circuitry is conditioning the battery before entering the fast charge phase B In the fast charge phase the message CHARGING appears on the display The time to achieve a full charge will depend upon the amount of charge remaining on the battery C Once the batteries are fully charged the message CHARGING is replaced by charge bar In this mode the battery charger will maintain battery charge using a pulse trickle mode as long as the adapter is plugged into the Battery Box If the AC DC adapter is connected while the Receiver is in operation and after the batteries have discharged below 4 volts the charger will remain in the charge pending phase The batteries will continue to discharge since the unit s operating current is greater than the pulse trickle charge rate When this condition occurs turn the unit off until the batteries have charged to the point that the fast charge phase begins The unit may then be turned back on 2 3 Operation with AA Dry Cells Although the four internal AA Nickel Metal Hydride NiMH batteries should provide sufficient power for most testing situations provision for operation with disposable lead acid ot alkaline batteries has been made A With the unit off and unplugged from the wall adapter remove the four 8 screws from the back of the receiver Remove the lid
12. change the setting Changing the step size will cause the synthesizer to unlock The transmitter is automatically disabled TX 0 after a ST X XXX command A new frequency FR XXXX yyyy must be sent after a step change followed by an enable transmitter command TX 1 Upon power up the step size defaults to factory settings Contact the factory if other step sizes are required QUERY COMMANDS HELP lt CR gt Returns text showing current settings and a summary of commands FR lt CR gt Returns the current frequency setting in the form XXXX yyyy MHz ST lt CR gt Returns the current step size setting in the form X X XXX MHz LD lt CR gt Returns 1 if frequency is locked 0 if the frequency is not locked or output is disabled TX lt CR gt Returns 1 if the frequency is enabled 0 if the output is disabled MX lt CR gt Returns the highest frequency that can be set in the form XXXX yyyy in MHz MN lt CR gt Returns the lowest frequency that can be set in the form XXXX yyyy in MHz VR lt CR gt Return software version X X ERROR RESPONSES Invalid commands will be acknowledged with an error response An error response will consist of 4 ASCII bytes followed by a carriage return The error code consists of the two characters ER followed by a two character error status code ERIC lt CR gt Invalid command The command was not recognized because it was not in the S proper format ERIN lt CR gt In
13. eiver The Model 5500 Signal Strength Receiver can be used to setup the Model 5700 Transmitter frequency when a laptop or PC is not available This function only works when the transmitter is set to the same step size as the receiver When the transmitter is first powered on the low band step size is always 10kHz and the high band step size is always 30kHz When the receiver is first powered on the step size is set to the step size that was used when it was powered down Whenever the receiver is to be used to program the transmitter frequency in the field the user must insure that the receiver low band step size is 10kHz and the high band step size is 30kHz When using RXSCAN software version 2 0 and earlier the user must insure that that step size is set to the desired value by manually typing in the desired step size in the command box located in the upper right hand corner of the window This is necessary following any band scan due to an error in the code the resets the low band step size to 10kHz and the high band step size to 100kHz Cable connections and power up 1 Turn on the receiver and the transmitter 2 If programming in the low band switch the transmitter selector to CELL If programming in the high band switch the transmitter to PCS Substitute GSM for CELL and DCS for PCS if using the GSM DCS transmitter 3 Using the supplied modular cable install the modular adapter labeled TX
14. ents 4 0 Controlling the Receiver Remotely The receiver can be controlled by a PC or embedded controller via the RS232 interface The RXScan software included with the receiver can be used to control the receiver for most applications Procedures in this section also describe control with terminal emulation software on a PC or laptop computer 5 0 e Install the supplied cable between a serial port on the PC laptop and the serial port on the receiver e Start the terminal emulation software and setup with the following parameters Baud rate 9600 Data bits 8 Stop bits 1 Parity none Comm port whichever one cable is plugged into on PC laptop Local echo ON Select line feed LF after carriage return CR when receiving The settings may be found in various places depending on the terminal emulation software used Generally check the Serial Port and Terminal configuration menus Power up the Receiver by depressing the ON button The software will respond with RDY or a similar message You can verify the current settings at any time by typing HELP A summary of commands is also displayed The receiver frequency is stored in non volatile memory When power is applied to the receiver it will return to the last entered frequency e Set up the receiver following the recommended sequence Set the target band BD X lt CR gt 0 low band 1 high band Set the frequency in MHz FR XXXX yyy lt CR gt Verify the fr
15. equency is locked LD lt CR gt See Section 5 0 for a complete listing of all commands and error codes Definition of Receiver Commands and Error Codes Put the keyboard in all CAPS mode before entering commands lt CR gt represents ENTER SET COMMANDS The response to all SET commands or a lt CR gt is the message OK lt CR gt FR XXXX yyy lt CR gt Set receiver frequency in MHz Inclusion of the decimal point and digits to the right of the decimal are optional CAUTION The synthesizer frequency must be divisible by the step size ST and must be resent after each step size change See note in ST description The receivers IF frequency is added to this number to determine the synthesizer frequency ST X XXX lt CR gt Set frequency step size in MHz Leading zeroes and the decimal point are required Trailing zeroes are optional CAUTION This step size is the synthesizer stepsize Step sizes are set at the factory It is not advisable to change the setting Changing the step size will cause the synthesizet to unlock Upon power up the step size defaults to factory settings Contact the factory if other step sizes are required BD X lt CR gt Set frequency band This command is used to select the band to be received BD 0 selects the low band BD 1 selects the high band QUERY COMMANDS FR lt CR gt Returns the current frequency setting in the form XXXX yyy MHz ST lt CR gt Returns the current
16. in this document 10 MODEL 5700 DUAL BAND BATTERY POWERED TRANSMITTER USER MANUAL 6 0 Overview of Model 5700 The Model 5700 consists of two Synthesizer Assemblies one low band Cellular ot GSM and one high band PCS or DCS and the RF Leveling and Battery Box The Battery Box Praxsym part number 310 010054 provides power and RF switching and leveling for the Synthesizer Assemblies contact Praxsym for part numbers and availability of synthesizer assemblies for other bands The battery box is also supplied with an AC DC adapter Praxsym part number 500 023000 for charging the batteries Factory settings for the Synthesizers are as follows Synthesizer Frequency Output Level Step Size Cellular 875 MHz 5 dBm 10 KHz 824 894 MHz Extended Cellular 875 MHz 5 dBm 10 KHz 805 894 MHz GSM 921 MHz 5 dBm 10 kHz 880 960 MHz PCS 1960 2 MHz 5 dBm 30 kHz 1930 1990 MHz Extended PCS 1960 2 MHz 5 dBm 30 kHz 1850 1990 MHz DCS 1785 MHz 5 dBm 30 KHz 1710 1880 MHz Typically the operator decides which frequency to use for testing This can be accomplished by scanning the band with the Dual Band Receiver Once the test frequency is determined the appropriate Synthesizer Assembly is programmed with the transmit frequency for the test 7 0 Operation of the Model 5700 Transmitter 7 1 Control and Indicator Description See the following figure for the connections and control locations A description of each func
17. on in the following way If attempting to program the transmitter to a low band frequency while in high band range on the receiver this obviously results in an error condition If the user rapidly changes the frequency resulting in rapid invalid frequency assignments to the transmitter the transmitter will lock up and not respond to input If lock up should occur shut off the power to the transmitter flip the switch to the off position and turn it back on Definition of Transmitter Commands and Error Codes SET COMMANDS The response to all SET commands or a lt CR gt is the message OK lt CR gt FR XXXX yyyy lt CR gt Set synthesizer frequency in MHz Valid frequencies are listed in the HELP inquiry Inclusion of the decimal point and digits to the right of the decimal are optional CAUTION The synthesizer frequency must be divisible by the step size ST and must be resent after each step size change See note in ST description TX X lt C gt Enable Disable output The Enable Disable output command is used to turn off the output by disabling the power to the VCO TX 1 turns the output on TX 0 turns the output off Upon power up TX 1 and the output is enabled ST X XXX lt CR gt Set frequency step size in MHz Valid step sizes are listed in the HELP inquiry Leading zeroes and the decimal point are required Trailing zeroes are optional CAUTION Step sizes are set at the factory It is not advisable to 16
18. quipment to make relative path loss measurements e Install the supplied cable between a serial port on the PC laptop and the serial port on the receiver e Install the antenna for the proper band and turn the receiver on e Start the RXScan software Enter the frequencies or channels that you would like to scan and then initiate the scan Information on controlling the receiver with the RXScan software can be found in appendix A e Using the spectrum display or the spreadsheet output of the RXScan software choose a test frequency Tune the receiver to the test frequency e Set up the test transmitter to the test frequency using the procedures outlined in Section 8 of this manual The RXScan software can also be used to set up the transmitter See Appendix A of this document e Install the 30dB attenuator on the RF OUT port of the test transmitter An attenuator is provided when the Receiver and Transmitter are purchased as a system Connect a coax cable from the attenuator to the antenna input of the receiver for the correct band Caution Always use the attenuator when connecting the transmitter directly to the receiver Too much RF power applied to the receiver could damage the low noise amplifier e Adjust the AMPL ADJ control on the transmitter until the receiver measures 30dB lower then the output power you would like at the transmitter antenna base e Connect the test transmitter to the test antenna e Begin path loss measurem
19. ransmitter frequency can be set using the keypad on the front panel of the receiver or controlled remotely These Model 5500 Dual Band Receivers are available Part Number Low Band High Band 310 010055 002 Cellular band 824 894 MHz PCS band 1930 1990 MHz 310 010055 003 GSM band 925 960 MHz DCS band 1805 1880 MHz The Dual Band Receiver can be used in conjunction with Praxsym s Model 5700 Dual Band Transmitter to take path loss measurements in the low band Cell or GSM and high band PCS or DCS Typically the operator decides which frequency to use for testing by scanning the band with the receiver identifying vacant frequencies Once the test frequency is determined the appropriate Transmitter Synthesizer Assembly is programmed with the transmit frequency for the test Note If your receiver is the Cellular PCS model the term low band will refer to the Cellular band and high band will refer to the PCS band Likewise in the GSM DCS model the term low band will refer to the GSM band and high band will refer to the DCS band 2 0 Operation of the Model 5500 Receiver 2 1 Control and Indicator Description See the following figure for the connections and control locations SIGNAL STRENGTH RECEIVER Communications port ui Shipping switch E i Model 5500 Dual Band Receiver Key Name Key Function ON Press the ON
20. rior to programming Follow the Instructions in Section 8 0 to set the desired frequency using an external controller and a serial cable 12 7 2 Battery Charging Connect the AC DC adapter 15V 1A to the unit s CHARGE jack Plug the adapter into a 115V 50 60 Hz power outlet An internal battery charger will control and terminate the charging of the 8 NiMH cells within each unit Allow 1 5 hours to fully charge the batteries Charge cycle description A A new charge cycle is started by 1 Connecting the AC DC adapter 2 The battery voltage dropping to 8 volts with the AC DC adapter already connected B The charge cycle begins in the charge pending phase The CHARGE LED will blink during the charge pending phase The charger circuit trickle charges the batteries during this phase as it prepares the batteries for the fast charge phase If the batteries had previously been discharged below 8 volts the charge pending phase will continue to trickle charge the batteries until they are charged back up to 8 volts C In the fast charge phase the batteries are charged at 900mA The CHARGE LED remains on D Once the batteries are fully charged the CHARGE LED goes off and the battery charger will maintain battery charge using a pulse trickle mode as long as the adapter is plugged into the Battery Box NOTE If the Model 5700 Transmitter will be operated for periods of greater than 4 hours it is recommended that the AC DC adap
21. status of the Synthesizer PLL When the padlock is closed the synthesizer is locked Battery Charge State Indicates the current charge state of the batteries Connection Function Shipping Switch The shipping switch should be placed in the OFF position whenever the receiver is placed in the case The switch prevents discharge of the batteries should the ON key on the front panel be inadvertently pressed Communications Port RJ45 modular jack for serial communications to the receiver See Sections 4 0 and 5 0 Charger Jack Jack for connection to 9V AC DC adapter for battery charging See Section 2 2 Low RF Input Connector TNC connector for low band antenna High RF Input Connector SMA connector for high band antenna 2 2 Battery Charging The Dual Band Receiver is fully operational while the batteries are being charged Charging can occur whether or not the unit is powered on However with the unit powered off there will be no way to monitor the charge cycle When the display shows BATTERY LOW the battery has less than 10 of its maximum capacity remaining Connect the AC DC adapter 9V 300mA to the unit s CHARGE jack Plug the adapter into a 115V 60 Hz power outlet An internal battery charger will control and terminate the charging of the 4 NiMH cells within each unit Allow about three hours to fully charge the batteries A The charge cycle begins in the charge pending phase Fot a period of time the battery display
22. step size setting in the form X X XXX MHz LD lt CR gt Returns 1 if the synthesizer is locked 0 if the synthesizer is not locked or output is disabled SS lt CR gt Returns the measured signal strength in the form XX y dBm MX lt CR gt Returns the highest low band frequency that can be set in the form XXX X yyyy in MHz MX2 lt CR gt Returns the highest high band frequency that can be set in the form XXX X yyyy in MHz MN lt CR gt Returns the lowest low band frequency that can be set in the form XXXX yyyy in MHz MN2 lt CR gt Returns the lowest high band frequency that can be set in the form XXX X yyyy in MHz VR lt CR gt Returns software version X X ERROR RESPONSES Invalid commands will be acknowledged with an error response An error response will consist of 4 ASCII bytes followed by a carriage return The error code consists of the two characters ER followed by a two character error status code ERIC lt CR gt Invalid command The command was not recognized because it was not in the proper format ERIN lt CR gt Invalid number or range The data included in the previous command was invalid or out of range ERSE lt CR gt Communications UART error The last command was not recognized due to a framing error in the serial communications This error will normally be encountered when the host s serial port does not match the serial port settings specified
23. ter be connected to the unit Although the transmitter may be operated during charging if the AC DC adapter is connected after the batteries have discharged below 8 volts the charger will remain in the charge pending phase The batteries will continue to discharge since the unit s operating current is greater than the pulse trickle charge rate When this condition occurs turn the unit off until the batteries charge to the point that the fast charge phase begins The unit may then be turned back on 7 3 Operation with AA Dry Cells Although the eight 8 internal AA Nickel Metal Hydride NiMH batteries should provide sufficient power for most testing situations provision for operation with disposable lead acid ot alkaline batteries has been made e With the unit off and unplugged from the wall adapter remove the four screws from the back of the Battery Box Remove the lid e Fully remove the batteries in the two holders e Install the new batteries and reinstall the lid and screws e Do not attempt to use the charger when disposable batteries are installed in the unit 13 8 0 74 Operation from an External Power Source If the unit is to be operated continuously from the supplied wall adapter and battery Operation is not desirable the following steps may be taken to operate without internal batteries e With the unit off and unplugged from the wall adapter remove the four screws from the back of the Battery Box Remove
24. tion is given below 11 POWER CHARGE BAND AMPL ADJ TUNING an ride CHARGE POWER BAND af gt 3 Ue 0 o O pes O i x S L oF cen PWR DATA Model 5700 Transmitter When the slide switch is moved to the ON position and power is applied to the selected synthesizer the power indicator LED will illuminate When the internal battery voltage is greater than 8V the LED glows green When the internal battery voltage drops below 8V the LED glows red Input jack for the AC DC adapter This section also contains a charge state indicator LED See Section 7 2 for battery charging operation When the slide switch is moved to the up position the PCS Synthesizer will be selected In the down position the Cellular Synthesizer is selected A green BAND LED will illuminate to indicate which band is selected for the operation and the status of the selected synthesizer The respective PCS or CELL LED will glow green only when the selected synthesizer is locked on a valid frequency Substitute GSM for Cellular and DCS for PCS when refering to the GSM DCS version of the transmitter Turning this adjustment screw clockwise increases the output power from the RF OUT connector Turning this adjustment counter clockwise decreases the output power from the RF OUT connector The individual synthesizers must be selected in order to be programmed Set the POWER switch to ON and position the band switch p
25. tude 2 4 Model and Scan Range Selection Now that the comm port is open go to Settings and choose the appropriate receiver model To scan a CELL range click the Receiver Cell tab near the top of the window To scan a PCS range click the Receiver PCS tab If you have the GSM DCS model you will have GSM and DCS tabs To select the frequency range either type in a valid channel into the Scanning Range Channel box or type a valid frequency into the Frequency Scan Range box The leftmost box sets the lower bound of the scan range while the rightmost box selects the upper bound If using the Channel scanning range boxes the Mode box determines whether the channel is interpreted as a Mobile or a Base channel z Ss lel f ix eso oso eaa se Tel peara penge luner poak Sean zz owe Scanning After the range has been selected press the Scan button The raw data communications with the receiver can be seen in the Terminal window to the right of the main window The frequency being scanned is displayed in the window marked Current Freq When the software is done scanning the selected range of frequencies it opens up Microsoft Excel and writes the data to a new worksheet NOTE Every time the software scans a range of frequencies it writes to a NEW workbook 19 4 0 100 Arial 10 2 c10 859 3 77 3 875 120 894 120
26. valid number or range The data included in the previous command was invalid or out of range ERSE lt CR gt Communications UART error The last command was not recognized due to a framing error in the serial communications This error will normally be encountered when the host s serial port does not match the serial port settings specified in this document 17 Appendix A RXScan Software 1 0 Using the RXScan Software 1 1 Installing the Software Note Before installing it is recommended to visit http www praxsym com software html and check for newer versions of RXScan as well as updates to this manual The RXScan software is supplied on CD Run the file setup exe For optimum performance install the program to the default directory C Program Files RXScan For the latest information on the software read the Readme txt file that comes with the setup files After the setup program has finished installing the software you may delete the setup files in the temporary directory that you created RXScan may now be accessed via Szart Menu Program Files RX Scan RX Scan exe 2 0 Setup for Receiver 2 1 2 2 2 3 Hardware Setup Before pushing the Scan button on the RXScan PC software the following hardware considerations should be checked 1 The Model 5500 Signal Strength Receiver should be turned on 2 An antenna or some type of signal source should be connected to either the low band
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