Service
Model
8901B
N=A
N=B
Internal Time Base Reference. The display should read
lOOOOOOfl
when no external
reference
is
connected. See Service Sheet
22.
Audio Counter Input.
If
the Audio Frequency measurement mode has been selected, the
frequency of the signal at the input
of
Audio Counter
is
displayed. (The frequency is
measured with the Counter in the
All
Counter Assembly. The Audio Counter in the A52
Audio Counter/Distortion Assembly is not exercised except for its Schmitt trigger input.)
See Service Sheet
16.
47.0
Instrument Configuration Display
(2314A
and
Aboue).
Displays certain instrument configu-
ration details in the following form
<New Opt. Series
030><
Old Opt. Series
030>
where
1
is yes and
0
is
no. The new Option Series
030
refers
to
instruments with serial prefixed 2642A
and above; old refers to older versions of the
HP
8901B Modulation Analyzer.
49.N
Display Internal Voltages.
The Voltmeter measures and displays the internal voltage (in volts)
selected by
N.
This special function also controls the rear-panel RECORDER output as explained in
the following note.
N=O
N=
1
N=2
N=3
N=4
N=5
N=6
N=7
N=8
N=9
N=A
N=B
N=C
N=D
N=E
N=F
Ground. See Service Sheet
15.
RF Peak Detector Ground. See Service Sheet 4.
RF Peak Detector
+3.
See Service Sheets 4 and 15.
RF Peak Detector. See Service Sheet 4.
x10
AM Calibrator. See Service Sheet
30.
xl
AM Calibrator. See Service Sheet
30.
Audio Range Detector. See Service Sheet
13.
RMS-to-DC Converter. See Service Sheet
16.
Ground. See Service Sheet
15.
Audio Average Detector. See Service Sheet
14.
Audio Peak Detector. See Service Sheet
14.
IF
Average Detector. See Service Sheet
8.
IF
RMS Detector (Option Series
030)
(2314A
and
Above).
See Service Sheet
34.
IF Peak Detector. See Service Sheet 9.
ALC Current. See Service Sheet
8.
RF Average Power
or
Sensor Identifier. To read average power, precede with Special Function
0.212.
To read sensor identifier, precede with Special hnction
0.211.
See Service Sheet
2.
Special Functions 8B-7
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