User`s Manual Frequency Synthesizer
Contents
1. User s Manual Frequency Synthesizer DPL 18GF Digital Signal Technology Inc 1 7 30 Higashi Benzai Asaka Saitama 351 0022 Japan TEL 81 48 468 6094 FAX 81 48 468 6210 URL http www dst co jp en Email info dst co jp 1 Digital Signal Technology Contents 1 General Description 2 3 2 Specification 2 3 3 Phase Noise 7 4 4 Outer Dimensions 5 6 5 Circuit Configuration 7 6 Connector Interface 2 7 7 Thermal Consideration 9 8 Control by SPI aa 9 9 Control by Asynchronous Serial Data 10 10 Shipping Inspection 11 11 ARR 11 UA sect cans meni acini 11 2 Digital Signal Technology 1 General Description DPL 18GF GFH is a frequency synthesizer which can generate any frequency from 1GHz to 18GHz 10 2 step It can be used as a clock source or local oscillator for communication and test measurement equipment because of its excellent phase noise and compact size The frequency is set not only with asynchronous serial data but by SPI serial data Once the frequency is successfully set it is automatically memorized into EEPROM So the next time it is powered the last entered frequency is retrieved 2 Electrical Specification Power Supply Current Frequency Range Frequenc2. bits reserved Logic level 3 3V CMOS 2 Timing characteristic ti CS s ueo 028000 Timing characteristic Parameter Condition Min Unit ti CLK setup time to CS 50 ns t2 CLK period 2 us t3 SDI setup time to CLK rise edge 100 ns t4 SDI hold time to CLK rise edge 100 ns t5 CS setup time to CLK rise edge 50 ns 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 Bits Name Width Description bit 23 22 Reserved 2 bits Not used do not care bit 21 0 Frequency 22 bits Frequency data in 10KHz resolution in binary For example if you set 18GHz the frequency data of 10KHz unit must be converted to binary data 18GHz is converted to 1B7740 hex 22 bits binary data 8 Digital Signal Technology Please note that even if the frequency of beyond 1GHz to 18GHz was set the quality of the signal would not be guaranteed 9 Control by Asynchronous serial data How to set from a PC serial port RS 232C is explained below 9 1 Communication specification Speed 9600bps Data bits 8 bits Stop bits 1 bit Parity None Flow control None Logic level 3 3V CMOS level 9 2 RS 232C connection The logic level of DPL 18GF serial communication is 3 3V CMOS which cannot be directly connected to RS 232C level like PC serial p
3. 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 10 Digital Signal Technology
4. nector Interface 1 External 10MHz input 2 Output Connector 3 Power Supply Pin 4 L F Connector 9 18GHz DIVIDER DIVER VALUE 1 2N 0 1 2 3 4 UNLOCK SMA J SMA J OUT 1 18GHz BUFF 10dBm 50 ohm 50 ohm Feedthrough capaciorSupply 6V 2 54mm 5x2 10 pin Connector for flat Cable Part No HIROSE HIF3FC 10PA 2 54DSA Pin Assignment Pin No Name Description 1 GND Signal GND 2 GND Signal GND 3 NC None 4 INT EXT Mode selection pin external or internal Ref clock High Internal Low External Internally pulled up 5 LOCK PLL lock status output High lock Low unlock 3 8V CMOS 6 ICS Chip select under SPI mode Input low active 3 3V CMOS Internally pulled up 7 RXD Asynchronous serial RX data 3 3V CMOS Internally pulled up 8 SDI Serial data input under SPI mode 3 3V CMOS 9 TXD Asynchronous serial TX data 3 3V CMOS 10 CLK Serial input under mode 3 3V CMOS Digital Signal Technology 7 Thermal Consideration Mount this module on chassis firmly in order to flow heat as power dissipation of this module is about 3 watts Or installing heat sink of heat resistance less than 6 5 degree C W is recommended Refer to Page 3 Outer dimensions about mounting holes It will be more effective if silicon compound is put on the surface of the mounting section of the module 8 Control by SPI serial data 1 SPI specification Max clock speed 500KHz Data bits width 24bits 22bits frequency data bits 2
5. ort Level converter LVC 232C between RS 232C and 3 3V CMOS is needed LVC 232C is available from our products line up Refer to our Web site http www dst co jp en manuals lvc232c pdf 9 3 Command definitions Character strings marked as double quotation marks means ASCII code and CR and LF which are control codes means 0 and If any invalid command is entered INVALID DATA CR LR 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 9 3 1 Frequency setting command For frequency setting input can be made in GHz MHz and KHz unit 1 Setting in GHz For setting 18GHz input the following data 18G CR In this case all the data below 100 2 is set to 0 2 Setting in MHz For setting 2400 2 input the following data 2400 In this case all the data below 100 2 is set to 0 3 Setting in KHz For setting 2400020 2 input the following data 2400020K CR or 240002 Please note that even if the frequency of beyond 1GHz to 18GHz was set the quality of the signal would not be guaranteed 9 3 2 READ command By entering READ CR the currently set frequency is output The response is as shown below 2 LF 9 Digital Signal Technology is the frequency of correctly outputting in KHz uni
6. t 9 3 3 SAVE command By entering SAVE CR the current frequency can be memorized into EEPROM When it is powered next time the stored data can be output 10 Shipping inspection 100 inspection shall be performed for the electrical specification in 2 1 11 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 under 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 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
7. y Resolution Output level Output Impedance Spurious Harmonics Phase Noise 10GHz typical Internal Ref Clock Accuracy External Ref Clock and Level Lock Time Operating temperature Range Outer Dimensions Interface 6V 5 lt 2A 1GHz 18GHz 10kHz step gt 10dBm 50 ohm lt 60dBc lt 8dBc 72dBe Hz 100Hz 2 gt 1kHz 97dBc Hz 10kHz 94dBc Hz 100kHz 11 2 1MHz lt 2ppm 0 50 degree 10MHz 6dBm 6dBm max 10msec 0 50 degree In case of being installed with thermal resistance 6 5 degree C W heat sink 60mmx70mmx17 5mm 60mm X 70mm X77 5mm with Heat Sink 1 Asynchronous Serial Communication 9600bps 8 bits 1 stop bit non parity 3 3V CMOS level 2 SPI serial communication 3 3V CMOS level Digital Signal Technology Phase Noise dBc Hz 3 Phase Noise 100K 1M 10M 10 100 10 Offset Frequency Hz 4 Digital Signal Technology 4 Outer Dimensions 1 DPL 18GF Feedthrough capacitor Supply 6V Interface connector 10pin LOCK LED 40 Ow F ADJ REF IN Mounting Hole 4 M2 6 Depth 4mm Mounting Hole 4 2 5 Through Hole NOTES Dimensions are in mm 5 Digital Signal Technology 2 DPL 18GFH 70 77 5 NOTES Dimensions are in mm 6 Digital Signal Technology 5 Circuit Configuration 3 6GHz 6 Con
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