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Summary of Contents for SRS Labs SR625
- Page 1 MODEL SR625 RUBIDIUM TIMEBASE / PRESCALER 1290-D Reamwood Avenue Sunnyvale, CA 94089 U.S.A. Phone: (408) 744-9040, Fax: (408) 744-9049 email: infor@thinkSRS.com • www.thinkSRS.com Copyright © 1994 by SRS All Rights Reserved Revision 2.1 (07/2001)
- Page 2 LINE VOLTAGE SELECTION LINE FUSE The SR625 operates from a 100V, 120V, Verify that the correct line fuse is installed 220V, or 240V nominal ac power source before connecting the line cord. For having a line frequency of 50 or 60 Hz.
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Page 3: Specifications
SPECIFICATIONS: 2.0 GHz Prescaler Input Impedance 50 Ω Maximum Input level +23dBm Frequency Range 50 MHz - 2.0 GHz Sensitivity See Figure below Output Expected Load 50 Ω Frequency 1/10 of the input frequency Waveform square wave, 700 mV pk-pk, +500 mV DC Prescaler Sensitivity (Typical) 20.00 10.00... -
Page 4: Front Panel Features
FRONT PANEL FEATURES terminated into a 50 Ω load the output is a 700 mV pk-pk square wave with a 500 mV POWER indicator is lit when the SR625 is DC offset. This output is connected to the powered from line voltage. -
Page 5: Rear Panel Features
REAR PANEL FEATURES Figure 2 – SR625 Rear Panel POWER ENTRY MODULE contains the CONFIGURING SR620 fuse and line voltage selector of the prescaler/timebase. Use a 1 amp slow blow The SR620's default timebase is its own fuse for 100/120 volt operation, and a 1/2 internal source. -
Page 6: Circuit Description
1N4001 Diode 3-00001-301 1N4001 Diode 3-00001-301 1N4001 Diode 3-00001-301 1N4001 Diode 3-00001-301 1N4001 Diode 3-00424-307 GREEN LED, T-3/4 D 10 3-00424-307 GREEN LED, T-3/4 D 11 3-00203-301 1N5711 Diode 4-00445-447 SR620-48 Pot, Single Control 7-00577-701 SR625 SIDECAR Printed Circuit Board... - Page 7 REF. SRS part# VALUE DESCRIPTION 3-00570-360 MMBR536L Integrated Circuit (Surface Mount Pkg) 4-01464-461 Thick Film, 5%, 200 ppm, Chip Resistor 4-01479-461 1.0K Thick Film, 5%, 200 ppm, Chip Resistor 4-01459-461 Thick Film, 5%, 200 ppm, Chip Resistor 4-01475-461 Thick Film, 5%, 200 ppm, Chip Resistor 4-01464-461 Thick Film, 5%, 200 ppm, Chip Resistor 4-01457-461...
- Page 8 1-00227-172 Y JUNCTION Line Cord 1-00228-172 USA 3' Line Cord 4-00541-435 130V/1200A Varistor, Zinc Oxide Nonlinear Resistor 6-00004-611 1A 3AG Fuse 6-00167-610 SR625 Transformer 7-00571-709 SR625 Lexan Overlay 7-00572-720 SR625 Fabricated Part 7-00573-720 SR625 Fabricated Part 7-00574-720 SR625 Fabricated Part...
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