HP 8901B Operation And Calibration Manual page 98

Help 2-1 1
Display
Code
02
03
06
09
Table
2-3. RF Frequency and Frequency Error, Error Codes (2 of 2)
Problem Description Input Problem
Input circuits overdriven. Increase RF
Input circuits underdriven. Decrease RF
Input circuits overdriven.
input attenuation.
input attenuation.
Input level exceeds
7 Vrms (1 W peak).
Decrease level
of input signal.
High stability time base problem (Option 002
instruments only).
Frequency
o f
input signal is not within
measurement range.
Indicates internal time base oven
cold lODtion 002 instruments onlv).
Adjust frequency of
input signal to within
measurement ranae, or
IF level not within its measurement range.
Frequency entered exceeds measurement range.
increase measurejnent
range. Refer to
Frequency Overrange
(2-7) and Frequency
Underrange (2-7).
Input signal level during
reference measuremeni
must be between
1.25V and 2.50V.
(Option 030 only.)
Invalid entry.
Invalid Special Function prefix entered.
Invalid Special Function suffix entered.
Operating Problem
Increase RF
attenuation.
Check internal time
base for malfunction.
Wait for oven to warm
for hiahest accuracv.
(When making Ratio
measurements,
allow instrument to
complete the reference
measurement.)
Re-enter frequency
within measurement
range. (In Ratio mode,
E
reference measurement
of zero is invalid.)
Check compatibility of
function@) with selected
measurement mode.
Check Special Function
number and re-enter.
Check Special Function
number and re-enter.