DPL-2.5GF
Contents
1. unit 2 3 0 0 0 0 0 K CR 32 33 30 30 30 30 30 4B OD hex hex hex hex hex hex hex hex hex The data below 100Hz is set at 0 automatically Input on 10Hz unit The following example shows the data in case setting 2300000000Hz on 10Hz unit 2 3 0 0 0 0 0 0 0 CR 32 33 30 30 30 30 30 30 30 OD hex hex hex hex hex hex hex hex hex hex BE How to memorize the frequency In order to memorize the current frequency into the built in EEPROM enter SAVE command as shown below CURRENT FRQUENCY IS SAVED message is returned if the command is received correctly S A V E CR 53 41 56 45 OD hex hex hex hex hex M How to change a reference clock source Internal or external clock mode can be toggled by entering EXT command Enter the following command E X T CR 53 41 56 OD hex hex hex hex When the above command is received correctly the following message is returned in external clock mode CURRENT CLOCK SOURCE gt EXTERNAL Do you want to change clock source Y N Clock mode can be changed from external to internal by entering Y This clock mode is saved in EEPROM and fixed semi permanently until next EXT command is issued How to adjust the internal reference clock When the internal reference clock frequency is deviated adjust as follows2. 1 Confirm whether the present clock mode is internal clock mode If it is in external clock mode change to internal clock mode with EXT command 2 Connect to a high resolution frequency counter and set a frequency such as 1000 00000MHz 3 Then enter DBUG command and DBUG menu will be shown below 4 Select 3 INTERNAL CLOCK FREQUENCY ADJUST so that the following message will be shown FREQUENCY ADJUST u or d gt XXXX XXXXX is the current hexadecimal correction value which has no meanings Enter the following character to up or down the frequency with frequency counter u To step the frequency up finely d To step the frequency down finely U To step the frequency up coarsely D To step the frequency down coarsely 5 Input E for the end of adjustment B Cautions 1 Use the low rippled power supply When the switching power supply is used use noise filter to reduce switching noise from the power supply 2 Pay attention to the accuracy of the power supply voltage because 5V power supply voltage affects output level 3 In external clock mode use the external 10MHz clock having the frequency accuracy of less than 3 ppm 4 The external reference input is high impedance In case of connecting with 500 coaxial cable use 50 Q termination Descriptions of this manual are subject to change without notice No portion of this manual can be reproduced without the permission of DS Techn
3. DDS PLL SYNTHESIZER DPL 2 5GF USER S MANUAL DIGITAL SIGNAL TECHNOLOCY INC 1 7 30 HIGASHI BENZAI ASAKA CITY SAITAMA 351 0022 JAPAN TEL 81 48 468 6094 FAX 81 48 468 6210 http www dst co jp en DPL 2 5GF is wide band signal generator utilizing DDS Direct Digital Svnthesis and PLL Phase Locked Loop technique It provides pure signal output from 700MHz 2 5GHz in 10Hz steps The frequency can be controlled by serial data which can be connected to PC communication port and can be memorized into EEPROM and in case of setting the power off and on again the stored frequency can be output The temperature compensated internal 10MHz clock provides high stability in wide temperature range In case the accurate 10MHz clock is available externally the frequency stability can be improved The half or quarter of the output frequency is available by adding optional frequency divider B Specification Power supply 5V 5 100mA 24V 10 200mA Frequency range 700MHz 2500MHz Output level 0 dBm 3dB Output impedance 500 Frequency resolution 10Hz Spurious less than 60dB except harmonic Harmonic spurious more than 10dBc Phase noise OFFSET from carrier center frequency 1KHz 10KHz 100KHz 700MHz 85dBc Hz 80dBc Hz 93dBc Hz 1000MHz 82dBc Hz 80dBc Hz 96dBc Hz 2500MHz 77dBc Hz 77dBc Hz 97dBc Hz Internal clock temperature frequency stability 2 5ppm 0 50 C long term frequency stability 3p
4. lname Signal direction Ref DPL 2 5GF lt gt terminal 1 CD connected to DTR internally 6 DSR gt connected to DTR internally 2 RD gt 7 RTS lt not used 3 TD lt 8 CTS connected to DTR internallv 4 DTR lt 4 CD CTS DSR 9 RI gt not used 5 GND lt gt It is possible to set frequency using common PC communication software for example Hyperterminal and so on HM How to set frequency The following message is returned when DPL 2 5GF is power on DPL 2 5GF OSCILLATOR VX X XXXXXXXX CLOCK MODE XXXXXXXX shows the present selected clock mode After prompt is returned from DPL 2 5GF enter frequency data The frequency data has three formats MHz unit input KHz unit input and 10Hz unit input When DPL 2 5GF received the data correctly and completed the frequency setting it returns as a prompt and output the desired frequency When the data received in correctly or some errors occurred during the transfer it returns INVALID DATA Each time the frequency data is set consecutively first make sure whether k code is returned then set new frequency Input on MHz unit The following example shows the data in case setting 2300 00000MHz in MHz unit 2 3 0 0 M CR 32 33 30 30 4D OD hex hex hex hex hex hex The data below 100KHz is set at O automatically Input on KHz unit The following example shows the data in case setting 2300000 00KHz on KHz
5. ology DS Technology assumes 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 DS technology assumes no responsibility for the third party s industrial property occurred from using the circuits described in this manual Copy right 2000 DS Technology All rights reserved Printed in Japan
6. pm per year frequency accuracy 2 5ppm 225 C adjustable External reference input External ref Input impedance Non Volatile memory save times Frequency control 10MHz 0 5 5Vp p more than 10k Q more than 10 000 RS 232C async serial input 9pin D SUB 9600BPS 8 bit without parity 1 stop bit Dimensions 104x67x29mm M How to connect terminal 24V power supply terminal 5V power supply terminal External 10MHz REF INPUT RS 232C port OUTPUT PORT Caution The polarity of the power supply should be connected correctly not to damage the DPL 2 5GF unit 1 5V power supply terminal Connect 5V 7 596 the power supply having more than 100mA current capacity 2 24V power supply terminal Connect 24V 1096 power supply having more than 200mA current capacity 3 External 10MHz reference clock input Apply 10MHz reference clock in external clock mode SMA connector is used 4 RS 232C port This is a signal control connector to set a frequency The frequency is controlled by RS 232C serial input and 9 pin D Sub female connector is used 5 Output port This is a terminal of output signal SMA connector is used B OUTLINE 57 Feedthrough capacitor TAW 24V Dsub 9 pin 10MHz REF IN RCA PIN JACK OUTPUT SMA B RS 232C port communication condition Communication speed 9600BPS Aysncronous Data length 8bit Stop bit 1bit Parity none Flow control none 9 pin D SUB pin ordering Pin Signa
Download Pdf Manuals
Related Search