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C H A P T E R T E N
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value. During this settling period, the stability of the 5071A with Option 001 High Performance
beam tube may be slightly degraded as the shorter term GPS system noise may not be sufficiently
filtered. After the final control loop averaging time has been achieved, performance to full specifica-
tions is available.
Cesium Status Using the Console Port
The
hp5071astat
command returns the contents of the cesium oscillator status registers in a human
readable form. Also included are parameters describing the inner workings of the oscillator. Below
is a sample response for this command:
Command:
hp5071astat
MeridianII reply:
Operation Status: NORMAL STEERED
Questionable Data: OK
Operating Parameters:
Cs Beam Current 0.100 uA
C-Field Current 12.169 mA
Ion Pump Current 0.0 uA
E-Multiplier Voltage 1928 V
Cs Oven Voltage 8.0 V
Signal Gain 14.4 % of maximum
RF Amplitude 1 35.7 % of maximum
RF Amplitude 2 34.9 % of maximum
Osc Oven Voltage -9.0 V
Osc Control +3.40 % of maximum
or, if the 5071A Cesium Control Module is not installed:
Command:
hp5071astat
MeridianII reply:
HP5071A is Not Installed
Detailed help information is available as shown:
Command:
help hp5071astat
MeridianII reply:
hp5071astat returns the contents of the Operation Status and Questionable
Data registers of the HP5071A Cesium oscillator in a human-readable form.
These are followed by a set of 10 other parameters describing the inner
workings of the Cesium oscillator.
The Operation Status is summarized in a 16 bit register, of which only
6 bits are used to indicate these conditions:
CALIBRATING (normal state during warmup)
STANDBY (non-operational maintenance mode)
ONBATTERY (on battery backup power)
NORMAL (normal state after warmup)
FATAL (fatal error, call factory)
STEERED (normal state after warmup, if steering is not zero)
NOTE: If none of these 6 bits are set, it is an indication of an
RS-232 communications fault with the HP5071A, and the Operation
Status will be reported as:
Summary of Contents for Meridian II
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