HP 8901B Operation And Calibration Manual page 320

Model
8901B
Operation
RF
input
Attenuation
RF Input Attenuation
Special Function
Code
FUNCTIONS
Special finction
1
(RF Input Attenuation)
Automatic Selection
0 dB
10 dB
DESCRIPTION
1
.o
SPCL 1 .OSP
1.1 SPCL 1.1SP
1.2 SPCL 1.2SP
The RF input attenuation and is usually automatically selected but can be manually set by keyboard
entry using Special Function 1.
30 dB
40 dB
50 dB
PROCEDURE
1.4 SPCL 1.4SP
1.5 SPCL 1.5SP
1.6 SPCL 1.6SP
To set the input attenuation to a selected range, or to enter
an automatic selection mode, key in the
corresponding special function code, then select SPCL
r
1.3 SPCL
T
~~
1.3SP
1
COMMENTS
Default Condition
When the Modulation Analyzer is first powered up, or when Automatic Operation or Instrument Preset
is selected, the RF input attenuation is placed in the automatic selection mode (Special Rnction 1.0).
Error 02,
03
If
the RF input attenuation is manually set to a range that causes the input signal level
to
overdrive
the input mixer, Error
02
is displayed. If the RF input attenuation is manually set so the signal level
reaching the
IF
circuits is too low for accurate measurements, Error
03
is displayed.
RF Input Attenuation
3-231