SRS SR625 Bruksanvisning

SRS Inte kategoriserad SR625

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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)
1
Safety and Preparation for Use
This instrument may be damaged if
operated with the LINE VOLTAGE
SELECTOR set for the wrong ac line
voltage or if the wrong fuse is installed.
LINE VOLTAGE SELECTION
The SR625 operates from a 100V, 120V,
220V, or 240V nominal ac power source
having a line frequency of 50 or 60 Hz.
Before connecting the power cord to a power
source, verify that the LINE VOLTAGE
SELECTOR card, located in the rear panel
fuse holder, is set so that the correct ac input
voltage value is visible.
Conversion to other AC input voltages
requires a change in the fuse holder voltage
card position and fuse value. Disconnect the
power cord, open the fuse holder cover door
and rotate the fuse-pull lever to remove the
fuse. Remove the small printed circuit
board and select the operating voltage by
orienting the board so that the desired
voltage is visible when it is pushed firmly
back into its slot. Rotate the fuse-pull lever
back into its normal position and insert the
correct fuse into the fuse holder.
LINE FUSE
Verify that the correct line fuse is installed
before connecting the line cord. For
100V/120V, use a 1 Amp slow blow fuse
and for 220V/240V, use a 1/2 Amp slow
blow fuse.
LINE CORD
The SR625 has a detachable, three-wire
power cord for connection to the power
source and to a protective ground. The
exposed metal parts of the instrument are
connected to the outlet ground to protect
against electrical shock. Always use an
outlet which has a properly connected
protective ground.
WARNING: Dangerous voltages, capable of causing death, are present in this instrument.
Use extreme caution whenever the instrument covers are removed.
2
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
-40.00
-30.00
-20.00
-10.00
0.000
10.00
20.00
Input amplitude (dBm)
1000 1200 1400 1600 1800
Input frequency (MHz)
Prescaler Sensitivity (Typical)
Maximum amplitude
Minimum amplitude
2000
Rubidium Timebase (see Operation Manual of Rb Oscillator)
Frequency 10 MHz
Accuracy at Shipment ± 5 E-11
One Day Stability 4E -11/day
Long Term Drift ≤ 5E -11/month, 5E -10/yr≤
Short Term Stability 1 Second (Allan Variance): 1 E -10
10 Second (Allan Variance): 3.16 E -11
100 Second (Allan Variance): 1 E -11
Warm-up time 10 minutes to meet short term stability

Produktspecifikationer

Varumärke: SRS
Kategori: Inte kategoriserad
Modell: SR625

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