Average Noise Level Test - HP 8566B Adjustment Manual

2-58 Performance Tests
Last Converter Adjustments
Displayed average noise level (0 dB input attenuation, 10 Hz
resolution bandwidth):
Non-Preselected
The displayed average noise level is measured in a 10 Hz bandwidth at
various frequencies with no signal applied to the analyzer input.
50 Ohm Coaxial Termination . . . . . . . . . . . . . . . HP 909A, Option 012
1. Press C-1.
2. Connect CAL OUTPUT to RF INPUT.
3. Press LRECALL) @. Adjust AMPTD CAL for a MARKER amplitude
of -10.00 dBm f0.02 dB.
4. Disconnect CAL OUTPUT. Terminate RF INPUT with a 50 ohm
coaxial termination.
5. Press @YYZZ]. Key in settings as follows:
START FREQ]
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..8 0 Hz
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180 Hz
]
REFERENCE LEVEL
VIDEO BW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Press (SHIFT) (VIDEO) G. Wait about 2 minutes for the VID AVG
6 .
readout to reach 10 sweeps or more, then press [SHIFT), TRACE B
7. Press MARKER (NORMAL). Tune to 100 Hz, or the nearest
frequency that is not on the slope of the LO feedthrough or on a
line-related sideband (e.g., 120 Hz). Refer to Figure 2-26.
Preselected
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -70 dBm
Hz