PCV-50F FREQUENCY CONVERTER USER`S MANUAL DIGITAL
Contents
1. 9 1 In the event of any doubt arising about these specifications discussion and resolution shall be made by arrangement 9 2 This product which employs a CMOS device may be easily damaged by static electricity 9 3 Keep in mind that immersion cleaning is not allowed 9 4 Special damp proof control is not necessary 10 Warranty If any defect is found due to the manufacturer s improper production or design within one year after delivery repair or replacement shall be performed at the manufacturer s responsibility Descriptions in this manual are subject to change without notice No part of this manual may be reproduced without our permission We shall assume no liability for any user damage as a result of an accident etc Descriptions in this manual shall not guarantee the practice of industrial property and other rights or grant a license for them We shall assume no liability for any third party s industrial property rights attributable to the use of circuits etc described in this manual Digital Signal Technology Inc 112. Duty 504 10 470 or more Parallel input Six signal lines 4 bit BCD input 1 bit digit data selection 1 bit reference output frequency data selection 1 bit strobe signal Serial input 9600bps 8 bits No parity 1 stop bit Within 250mS Time between completion of setting of Outer dimensions 2 2 Environmental conditions Operating temperature range 3 Outer dimensions 57 00 53 34 50 80 46 26 45 72 43 16 40 64 38 10 35 56 5 06 2 54 0 00 3 60 2 73 4 Pin assignments GND 5V SET A D DO D1 D2 D3 RXD TXD O 1 en MARK 6O 2 17 18 Q3 O4 O5 O7 8 BO Os 2 O 10 1O TOP VIEW frequency data and acquisition of the set frequency 61x46x13 mm o 50 C 13 00 0 00 5 00 06 TYP 45 PO 43 37 REF GND FOUT REF GND OUT GND 5 Pin names and descriptions Pin No Name Description 1 GND Power supply signal GND 2 5V Power supply pin to which 5V 5 should be supplied 3 SET Strobe signal for setting with parallel data As it is pulled up internally data of A D and DO to D3 are read internally by connecting it to GND Data is loaded on falling edge 4 A D Select digit or numerical value for parallel data DO to D3 Set digit of 7 digit frequency data you want to change by H open Set the numerical value for selected digit by L short circuited to GND It is pulled up internally 5 DO Input of frequency data digit
3. PCV 50F FREQUENCY CONVERTER USER S MANUAL History revl 0 2 1 2003 first edition issued revl 1 3 1 2003 consumption current revised revl 2 3 1 2004 10M REF revised DIGITAL SIGNAL TECHNOLOGY INC 1 7 30 Higashi Benzai Asaka Saitama 351 0022 Japan TEL 81 48 468 6094 FAX 81 48 468 6210 Email info dst co jp http www dst co jp en 1 Functional outline The PCV 50F is a programmable oscillator that can take out signals of desired frequencies from 1Hz to 50MHz with 0 001Hz resolution by using a 48 bit DDS direct digital synthesizer The external reference frequency can be input as desired in a range of 7MHz to 50MHz The output frequency can have an accuracy based on the stability of the external reference signal Frequency settings can be made with serial data and parallel data 2 Specifications 2 1 Electrical specifications Power supply voltage Consumption current Output level Output frequency range Frequency resolution Output waveform duty Frequency error Jitter Spurious level External reference signal frequency External reference signal level External reference input impedance Frequency control Frequency setting time 5V 5 500mA or less CMOS 0 001Hz 50MHz 1mHz 0 001Hz 50 5 0 46pHz or less with respect to external reference 100pS rms or less cycle to cycle jitter value at 5MHz or higher frequency 40dBc or more excluding harmonics 10MHz 5 2 5Vp p
4. and then set the frequency data for that digit Select whether the BCD SW corresponds to digit or frequency data by the A D input For example how to set for inputting 16 000 000Hz is shown below a Open S2 set the DIP SW to O digit of 0 001Hz and push S1 for inputting short circuited to GND b Close S2 short circuited to GND set the BCD SW to 0 frequency data at the digit of 0 001Hz and push S1 Now frequency data is set at one digit c Also set at the digit of 0 01Hz as in a and b by setting the BCD SW to 1 digit of 0 01Hz and pushing S1 for digit setting d In a similar manner set the frequency data from the digit of 0 1Hz to the digit of 100KHz to 0 e At the digit of IMHz open S2 set the BCD SW to 9 push S1 and then close S2 set the BCD SW to 6 and push S1 f At the digit of 10MHz open S1 set the BCD SW to A push S1 and then close S2 set the BCD SW to 1 and push S1 Remark Since the input buffer of parallel data is initially set to 0 immediately after power on 0 data can be omitted In the above example a to d can be omitted Caution Keep in mind that if the REF signal of a frequency higher than the set reference frequency is input the consumption current will increase and if this state is continued for a long time the device may be damaged 6 2 Output frequency setting The output frequency can also be set in units of 1 mHz Since the maximum frequency of
5. ings are made continuously this processing will not be performed in time If you set one frequency set a new frequency after a lapse of 200mS or more See the timing chart shown below 260 S gt 100ns A D CY a Cy DO D3 X X FOUT REF i gt 100ns SET D o ee 3 at ae A _ gt 200ms Parallel data timing chart Example of parallel data setting circuit 1 end REF LLL 2 y e V GND FOUT REF PCV 50 So 3 SET s2 4 5 4l AD LAT 1 5 DO BCD 2 6 D1 SW 7 4 D2 8 8 D3 GND COM 9 RXD OUT Ae 10 XD GND 16 15 4 g 3 OPEN FOUT 77 SHORT REF The BCD SW in use is the complementary type Function table A D D3 D2 D1 DO Function L L L L L Frequency data 0 L L L L H Frequency data 1 L L L H L Frequency data 2 L L L H H Frequency data 3 L L H L L Frequency data 4 L L H L H Frequency data 5 L L H H L Frequency data 6 L L H H H Frequency data 7 L H L L L Frequency data 8 L H L L H Frequency data 9 H L L L L 0 001Hz digit setting H L L L H 0 01Hz digit setting H L L H L 0 1Hz digit setting H L L H H 1Hz digit setting H L H L L 10Hz digit setting H L H L H 100Hz digit setting H L H H L 1KHz digit setting H L H H H 10KHz digit setting H H L L L 100KHz digit setting H H L L H 1MHz digit setting H H L H L 10MHz digit setting H H H H L Frequency saving H Open L Short circuited to GND The input data of DO to D3 and A D are loaded
6. on the falling edge of SET For output frequency setting set FOUT REF to H open and for reference signal frequency setting set it to LOW short circuited to GND 7 Setting with serial data 7 1 Setting procedures At power on the following message appears PCV50 FREQUENCY CONVERTER VX X 66099 When the prompt is returned from the PCV5OF frequency data can be input eg If data is input properly the prompt is returned and the input frequency is output If the input frequency is invalid INVALID DATA is returned For setting the frequency consecutively transmit frequency data and confirm that eg the prompt is returned and then input next frequency data The frequency can be input in MHz KHz Hz or mHz 0 001Hz together with a decimal point For inputting the reference frequency prepend the letter R to the frequency data The following table shows an example of data for setting the reference frequency to 10 25MHz R 1 0 2 5 M CR 52 31 30 2E 32 35 4D oD hex hex hex hex hex hex hex hex The following table shows an example setting of the output frequency The data for setting an output frequency of 12 345678012MHz in MHz is shown below 1 2 5 3 4 5 6 7 8 9 0 1 2 M CR 31 32 2E 33 34 35 36 37 38 39 30 31 32 4D oD hex hex hex hex hex hex hex hex hex hex hex hex hex hex hex gt The data for inputting the above frequenc
7. or numerical data bit 0 2 6 D1 Input of frequency data digit or numerical data bit 1 21 7 D2 Input of frequency data digit or numerical data bit 2 22 8 D3 Input of frequency data digit or numerical data bit 3 23 9 RXD Asynchronous serial data input pin Level is TTL compatible CMOS When not in use open it because the input is pulled up 10 TXD Asynchronous serial data output pin Level is TTL compatible CMOS When not in use open it 11 GND Power supply signal GND 12 OUT Output terminal 13 GND Power supply signal GND 14 FOUT REF Input pin to select input of output frequency or reference signal frequency data for frequency setting in parallel H open and L short circuited to GND result in selection of output frequency and reference signal frequency respectively 15 GND Power supply signal GND 16 REF Desired external clock input Remark Pin No 3 4 5 6 7 8 9 and 14 are pulled up by 10KQ 6 How to set frequencies with parallel data Setting data includes reference frequency and output frequency either of which is determined by the FOUT REF pin 6 1 REF frequency setting The reference signal frequency can be set in units of 1 mHz Since the maximum frequency of the reference signal is 50MHz it is necessary to input frequency data at up to 11 digits by the following procedures In the reference signal setting mode set FOUT REF to LOW level short circuited to GND Next select the digit to input
8. the output is 50MHz it is necessary to input frequency data at up to 11 digits by the following procedures In the output frequency setting mode set FOUT REF to HIGH level open Next select the digit to input and then set the frequency data for that digit Select whether the BCD SW corresponds to digit or frequency data by the A D input For example the method of setting for inputting 43 000 000Hz is shown below a Open S2 set the DIP SW to O digit of 0 001Hz and push S1 for inputting short circuit to GND b Close S2 short circuited to GND set the BCD SW to 0 frequency data at the digit of 0 001Hz and push S1 Now frequency data is set at one digit c Also set at the digit of 0 01Hz as in a and b by setting the BCD SW to 1 digit of 0 01Hz and pushing S1 for digit setting d In a similar manner set the frequency data from the digit of 0 1Hz to the digit of 100KHz to 0 e At the digit of IMHz open S2 set the BCD SW to 9 push S1 and then close S2 set the BCD SW to 3 and push S1 f At the digit of 10MHz open S1 set the BCD SW to A push S1 and then close S2 set the BCD SW to 4 and push S1 6 3 How to save frequency by parallel data For saving the set frequency in the built in EEPROM semipermanently open S2 set the BCD SW to E 10 and push S1 6 4 Caution for setting data consecutively Since the PC performs frequency setting processing immediately after setting of frequency data if sett
9. y in mH is shown below 1 2 3 4 5 6 7 8 9 0 1 2 m CR 31 32 33 34 35 36 37 38 39 30 31 32 6D oD hex hex hex hex hex hex hex hex hex hex hex hex hex hex gt 7 2 How to save frequency by serial data For saving the set frequency in the built in EEPROM transmit the SAVE command as shown below If it is written properly the message EEPROM SAVED is returned S 53 hex A 41 hex Vv 56 hex E 45 hex CR 0D hex 7 3 Level converter with RS 232C Since the level of PCV50F serial data is CMOS such a level converter as shown below is required for use in connection with a PC serial port Example of serial data setting circuit Ber is REF INPUT PREF t GND 12 OUT out r OUT D SUB 9PIN MAX232C 7 4 Caution for setting reference frequency In setting the reference frequency if a frequency higher than the set reference frequency is added as the REF signal the consumption current will increase significantly depending on the set value If this state is left for a long time the device may be damaged Use the REF frequency and set value as properly adjusted 8 Shipping inspection 8 1 Electrical inspection 100 inspection shall be performed for the electrical specifications in 2 1 8 2 Appearance inspection Inspection shall be performed for contamination and bends in pins 10 9 Other
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