HP 8901B Operation And Calibration Manual page 336

Operation
HP-IB
Model
8901B
HP-IB Output Format
The
HP-IB
output format for errors
i s
shown below:
+900000
DD
00
E+01
CR
LF
Line Feed
Error Cod Carriage Return
Fixed Data
Fixed Data
For
example, Error
02
is output
to
the
HP-IB
as +9000000200E+OlCRLF.
Once an error
has
been
input to the computing controller, the error code
i s
simply derived
by
subtracting
9~10~'
from the
input number, then
dividing the
result
by 1000.
Error Messages
The
following table
describes
all
Operating
Errors
and
includes
the
error code, message,
and
the
action typically required to remove the error-causing condition. The C O M M E N T S column that follows
provides additional information
and
references pertaining to particular error messages.
Error
Code
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
96
Message
IF frequency error.
Input level too high.
Input Level too low.
Audio circuits overdriven.
FM spuelched.
RF input overload.
Voltmeter and display overload.
Calibrator error.
Option not installed.
Input frequency out of range.
Calculated value out of range.
Time Base oven cold (Option 002).
Power sensor not connected.
Power sensor cannot zero.
Calibration factor error.
Audio circuits underdriven.
Selective power measurement (option
series 030)
RF Power will not calibrate.
(HP-IB only) No input signal sensed
by instrument.
lperating Errors
Corrective Action
Retune to signal at input.
Increase RF input attenuation.
Decrease RF input attenuation.
Increase audio range.
Reduce signal level varations (AM) at RF INPUT.
Reduce RF signal level at RF INPUT, then press any key.
Increase audio range.
Connect CALIBRATION AM/FM OUTPUT to RF INPUT or turn off
calibrator.
Select another instrument function.
Adjust input frequency to within specified limits.
Conversion from
YO
to dB is not possible. Press LOG/LIN for linear
display.
For highest accuracy, wait until oven is warm. (Refer to Special
Function 15.)
Press RF POWER. RF level measurement is initiated if the power
sensor is not connected.
Assure zero power at SENSOR input.
Input calibration factors.
Increase external audio input level.
Release RANGE HOLD, adjust input level or re-reference
measurement.
Assure 0 dBm at SENSOR input.
Increase signal level at RF INPUT or retune.
3-248
Error Message
Summary
rev.15JUL.37