Symmetricom 58502A - Manual (Page 44)

Chapter 2 Performance Tests
58502A Calibration (Option 010 Only)
2-18 User’s Guide
Figure 2-7. 58502A Calibration Setup
4 Observe Counter reading.
If difference from 10 MHz is < 5 × 10
−
8 (0.5 Hz), then perform the
“Software Oscillator Adjustment” procedure below.
Software Oscillator Adjustment
1 Use the terminal and serial port to send the following SCPI command
to ascertain the EFC value currently applied:
DIAG:CAL:ROSC:EFC:ABS?
HP 53131A
Universal
Counter
or equivalent
BNC Cable
BNC Cable
Outputs
1 - 12
HP 24542U
Interface
cable
or equivalent
RS232C
Port
To any
available
Output
A B 1 2 3 4 5 6 7 8 9 10 11 12
5 VRMS MAX
100-240 VAC 50/60GHz 40 VA Max ! ! !
58502A
Distribution
Amplifier
Terminal or PC
Ref. In
50
Ω Feedthrough
(HP 10100C)
5071A PRIMARY FREQUENCY STANDARD
Continuous
Operation
HP 5071A
Primary Frequency
Standard or equivalent
Channel 1
Port1
10 MHz External
Reference Out