User`s Manual GPS Synchronized Programmable Oscillator GPSG-3G
Contents
1. 1 kHz offset 140 dBc Hz Typ 10 kHz offset 142 dBc Hz Typ 100 kHz offset 149 dBc Hz Typ 1MHz offset 150 dBc Hz Typ 3 3V CMOS 75ns to UTC RMS 1 Sigma GPS Locked 20ns typ after power on about 30minutes 1hour USB2 0 4 Digital Signal Technology Common Specifications 1 Supply Voltage 5V 5 max 750mA 2 Dimensions 110x90 mm 3 Operating Temperature Range 0 60 degreeC 4 Storage Temperature Range 30 70 degreeC 5 Accessory GPS antenna with BNC connector 10M 1 MMCX BNC adapter cable 15cm 1 USB cable 15M 2 2 3 Phase noise typ value REF10M 100M OUT 50M OUT 100M OUT 500M OUT 15G OUT z o aa S E im CL 10 100 1K 10K 100K 1M 10M Offset Hrequency Hz 3 Outer Dimensions 110mm E 100mm E gar 4 4 23 5mm E E E E oo o co Yo LUUD 5 Digital Signal Technology 4 Appearance and Feature for each paris 4 1 Appearance o p it a DERE ae AI Le dedii ad EE ME TENMEM 00 50 E me im a E MOST ye Sis pa 7 HI Digital Signal Technology Fe 32 PCK3GF 1 B SIN 29999 a 7 w ym w oO QE amp D 4 2 Name and description for each part No Name Description Ji USB1 USB communications interface pin for GPSTCXO Connector USB Mini B J2 USB2 USB communications interface pin for REF10MF PCK3GF 1 Connector USB Mini B J4 102. 7 1 SPI specification Max clock speed 500KHz Data bits width 24bits 22bits frequency data bits 2bits Logic level 3 3V CMOS 7 2 Timing characteristic ti CS reserved sk eu nhnnnnninnic SDI on D22 Jozi on oi uu ors D2 D1 DO 11 Digital Signal Technology Timing characteristic Parameter Condition ti CLK setup time to CS t2 CLK period t3 SDI setup time to CLK rise edge t4 SDI hold time to CLK rise edge t5 CS set up time to CLK rise edge 7 3 Command definitions 24 bits frequency data is transferred by serial data Actual frequency data bits are 22 bits among 24 bits the remaining 2 bits are not used Bit definition is as follows Min 50 100 100 50 Unit ns us ns ns ns Bits Name Width Description bit 23 22 Reserved 2 bits Not used Do not care bit 21 0 Frequency 22 bits Frequency data in 1 KHz resolution in binary For example if you set 2456000KHz frequency data of KHz unit must be converted to binary data 2456000KHz is converted to 2579C0 hex in 22 bits binary data 8 How to switch an external clock or Internal Clock Switching an external clock or internal clock is available at J10 Jumper for an external clock mode o o Li J10 E J10 EXT INT 9 Shipping inspection 100 inspection shall be performed for the electrical specification in 2 1 10 Warranty Jumper for an internal clock mode If any defec
3. CR OFFSET is given in xxx with 2 complement HEX data Enter 000 for OFFSET 0 Enter 100 for stepping the frequency up max 7FF Enter F00 for stepping the frequency down max 800 The numeric value itself cannot be converted to frequency but LSB is appropriated to approximately 2 65Hz Once frequency is successfully set it is automatically memorized in EEPROM And the last saved frequency can be recalled when power is on next time 6 1 8 STAT command REF10MF By entering SSTAT CR the currently set parameters are output such as internal offset value PLL lock status and EXT INT condition ADJ xxx xxx is SDJ OFFSET value and shows in 2 complement LOCK y y is the LOCK CONDITION 1 LOCK 0 UNLOCK EXT INT z zis a CLOCK MODE 1 External clock mode 2 Internal clock mode 10 Digital Signal Technology 6 2 How to control with FT232R by user s own program 1 Download the FT232R driver from the link address below http www ftdichip com Drivers D2XX htm 2 Connect J1 or J2 into PC port and Found New Hardware Wizard begins Select the folder which was done on the procedure 5 1 Then install the driver 3 Set FT232R in the user s program as the following specification Communication speed 9600bps Data bit 8 bits Stop bit 1 bit Parity none Flow control none Also refer to the link address below http www ftdichip com Support Links htm Control by SPI serial data How to set using SPI interface is explained below
4. Procedure 2 Use USB cable to connect J1 or J2 and PC Found New Hardware Wizard will begin and then select the folder where you downloaded Finally install the driver Procedure 3 Set the communication setting of PC as below Speed 9600bps Data bits 8 bits Stop bits 1 bit Parity none Flow control none 8 Digital Signal Technology Any communication software such as Hyperterminal can be used for setting from the virtual COM of PC 6 1 1 Command definition PCK3F 1 REF10MF Character strings enclosed in double quotation marks means ASCII code and CR and LF which are control codes means OD hex and OA hex If any invalid command is entered INVALID DATA CR LF is returned All characters used for input should be uppercase If a normal command is entered is returned Also the entered data is echoed back GPSG 3G is consisted of GPSTCXO PCK3GF 1 and REF10MF but PCK3GF 1 and REF10MF is controlled by SCI serial communication In case of controlling REF10MF put always in front of the command 6 1 2 Frequency setting command PCKS3GF 1 For frequency setting input can be made in MHz KHz and Hz unit 1 Setting in MHz For setting 2450MHz input the following data 2400M CR In this case all the data below 100KHz is set to 0 2 Setting in KHz For setting 2400002KHz input the following data 2400002K CR Also the following expression is allowed 2400002 CR 6 1 3 READ com
5. 0 Hz offset 86 dBc Hz Typ 1 KHz offset 104 dBc Hz Typ 10 KHz offset 109 dBc Hz Typ 100 KHz offset 106 dBc Hz Typ 1MHz offset 135 dBc Hz Typ 10MHz offset 156 dBc Hz Typ 4 Spurious Max 65dBc Except harmonics 5 Output Harmonic Level Max 8dBc 6 Output Level More than 10dBm 7 Lock Output lock High level unlock Low level 3 Digital Signal Technology 8 Lock Time 9 Interface REF10MF 1 Output Frequency 2 Output Level 3 Output Harmonic Level 4 Phase Noise 4 Spurious 5 Output Unlock 6 Interface GPSTCXO 1 Output Frequency 2 10MHz Retrace 3 Frequency Stability 4 Output Level 5 Phase Noise 6 7 8 9 1PPS Output Level 1PPS Accuracy GPS Lock Time Interface Na 3 3V CMOS level max 40m sec 1 USB2 0 Shared REF10MF 2 SPI serial 3 3V CMOS level 3 bytes date 24bits 100MHz more than OodBm max 8dBc 100MHz_ Typical 10 Hz offset 77 dBc Hz Typ 100 Hz offset 119 dBc Hz Typ 1 kHz offset 142 dBc Hz Typ 10 kHz offset 154 dBc Hz Typ 100 kHz offset 160 dBc Hz Typ 1MHz offset 162 dBc Hz Typ max 70dBc except harmonic lock High level unlock Low level 3 3V CMOS level USB2 0 shared with PCK3GF 1 10MHz square wave 2E 08 After 1 Hour 25 C no GPS 1 5e 07 no GPS lt 5E 12 over 24hrs with GPS 3 3Vpp open end 1 5Vpp 500 terminated 10MHz Typical 10 Hz offset 99 dBc Hz Typ 100 Hz offset 126 dBc Hz Typ
6. MHz OUT 10MHz Output terminal of 1OMHz GPSTCXO Levels 3 38V CMOS open end Connector SMA J J5 MONI EXT Monitor output for 100MHz reference clock of REF10MF Output Level more than 0dBm 50 ohm terminated Connector SMA J J6 RF OUT Signal output Connector SMA J Output impedance 50 ohm J7 PWR 5V power supply pin 2 pin screw terminal Connector Part Number ML 35A 2P Sato Parts 6 Digital Signal Technology No Name Description J10 J11 J14 GPS J3 D1 D2 D3 GPS D3 4 3 J11 Connector and pin assignment EXT INT HEADER interface 1PPS OUT GPS ANT IN GPSLOCK1 REFLOCK PCKLOCK GPSLOCK2 Internal and external switching pin of REF10MF SPI Control unlock signal power supply pin 2 54mm pitch 5x2 pin header connector Connector Part Number PS 10PE D4T1 PN1 JAE 1PPS output terminal of GPSTCXO Connector SMB J level 3 3V CMOS GPS antenna input pin of GPSTCXO Connector MMCX Connect GPS antenna with 15cm MMCX BNCJ conversion cable LED lights when synchronized to GPS LED lights when synchronized to an external 10MHz clock LED doesn t light in case of the internal clock because VCO is free run LED lights when sychronized to an external 100MHz clock Red LED and Green LED Both of them lights for a second and soon goes off when the power is turned on As soon as the Red LED begins to blink the internal TCXO starts to lock to UTC After 30 minutes to 1 hour Green LED lights No Name D
7. User s Manual GPS Synchronized Programmable Oscillator GPSG 3G Digital Signal Technology Inc 1 7 30 Higashi Benzai Aska Saitama 351 0022 Japan TEL 81 48 468 6094 FAX 81 48 468 6210 WEB http www dst co jp en email Info dst co jp AON Oa RA O N O Contents General Description 0 2 2 2 2 3 Specification 2p Lenses 3 Outer dimensions eee 4 Appearance and feature for each parts 2 5 Control by USB1 X 1 Juxi an scsm 6 ConrolbyUSB2 eese 8 Control by SPI serial data 2222 9 How to switch an internal clock or external clock 10 Shipping inspection ee 10 Warranty catered ir 10 OMS yaar Pe esu 10 2 Digital Signal Technology 1 General Description GPSG 3G is an open framed non enclosed signal generator board equipped with PCK3GF 1 REF10MF and GPS synchronized 10MHz reference clock GPSG 3G can generate your desired clock signal with 1KHz resolution in an extremely wide band of 50MHz 3000MHz PC port PC port USB2 10M OUT i GPSTCXO REF10MF PCK3GF 1 2 5V MAX750mA DC Screw type terminal ema 100M OUT 2 Specifications 2 1 Electrical Specifications PCK3GF 1 1 Output Frequency Range 2 Frequency Resolution 3 Phase Noise 50 3000MHz 1KHz 3GHz_ Typical 10 Hz offset 46 dBc Hz Typ 10
8. escription 1 GND Power Supply signal GND GND Power Supply signal GND 45V Power input 5V Not using the PWR connector the power can be supplied from here 4 45V the same as above 5 LOCK PLL lock status output of PCK3GF 1 3 3V CMOS 6 CS Chip select under SPI mode Input low active 3 3V CMOS Internally pulled up f LOCK PLL lock status output of REF10MF 3 3V CMOS 8 SDI Serial data input under SPI mode 7 Digital Signal Technology 3 3V CMOS 9 LOCK GPS signal output of GPSTCKO 3 3V CMOS 10 CLK Serial clock input under SPI mode 3 3V CMOS 5 Control by USB 1 communication GPSTCXO 5 1 Refer to the following User s Manual for detailed specifications such as commands GPSTCXO http www dst co jp pdf file gpstcxo pdf 5 2 Device The device is FT232R manufactureed by FTDI See item 6 for more information about the driver software 5 3 Set the communication setting of PC as below Speed 115200bps Data bits 8 bits Stop bit 1 bit Parity none Flow control none 6 Control by USB2 communication REF 10MF PCK3GF 1 The interface of start stop synchronization is used by USB communication The device is FT232R manufactured by FTDI There are two ways to control one is to control from the virtual COM port of PC and another is to control FT232R directly by user s own program 6 1 Procedure 1 Download the FT232R drivers from the link addressed below and then unzip it to a folder http www ftdichip com Drivers VCP htm
9. mand PCK3GF 1 By entering READ CR the currently set frequency is output The response is as shown below ffffffffKHZz CR LF fffffff is the frequency of currently set in KHz unit 6 1 4 SAVE command PCKS3GF 1 By entering SAVE CR the current frequency can be memorized into EEPROM When the power is on next time the stored data can be output 9 Digital Signal Technology 6 1 5 REF command PCK3GF 1 REF frequency can be changed to 50MHz or 100MHz by entering REF CR The inputted frequency can be memorized into the EEPROM and the last saved frequency can be recalled even if power is off The following response is returned CURRENT xxMHz Enter 1 for 50MHz 2 for 100MHz gt gt The current REF frequency is displayed on xx Enter 1 or 2 and the following response is returned ARE YOU SURE Enter Y gt gt By entering Y the selected REF frequency stored in the EEPROM will be enabled 6 1 6 Caution for setting data consecutively PCK3GF 1 In case of switching frequency at high speed data may drop out because the PCK3GF 1 does not use flow control Upon completion of processing by sending a frequency setting command in 6 3 1 the wD prompt is returned therefore confirm the receiving of this prompt and then send the next frequency setting command 6 1 7 Internal clock frequency adjustment command REF10MF Adjust the frequency by entering ADJ__xxx
10. t is found due to the manufacturer s improper production or design within one year after delivery repair or replacement shall be performed a the manufacturer s responsibility DS Technology Inc assumes no liability for damages that may occur as a result of handling by users even though the warranty period 12 Digital Signal Technology 11 Others 11 1 This product which employs a CMOS device may be easily damaged by static electricity DS Technology Inc assumes no liability for damages that may occur as the result of handling by users even though the above warranty period 11 2 Do not supply over voltage power supply module may be damaged DS Technology Inc assumes no liability for damages that may occur as the result of handling by users even though the above warranty period Descriptions of this manual are subject to change without notice No portion of this manual can be reproduced without the permission of Digital Signal Technology Digital Signal Technology assumed no liability for damages that may occur as a result of handling by users The contents of this manual do not apply to the warranty in executing an industrial property or other rights nor permission for the right of execution Digital Signal Technology assumes no responsibility for the third party s industrial property occurred from using the circuits described in this manual 13 Digital Signal Technology
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