4-18
Performance Tests
6. Test Port Input Noise Floor Level
Port 1 Noise Floor Level for 3 GHz to 6 GHz (IF BW= 10 Hz)
34 Press MEAS, INPUT PORTS, A, TESTPORT 2.
35 Press MENU, TRIGGER MENU, SINGLE.
36 When the analyzer finishes the sweep, notice the mean value.
37 Convert the measured linear magnitude mean value to log magnitude, using
this equation.
Power (dBm) = 20 * [log10(linear magnitude mean value)]
38 Write this calculated value on the "Performance Test Record."
Port 1 Noise Floor Level from 3 GHz to 6 GHz (IF BW= 3 kHz)
39 Press AVG, IF BW, 3, k/m.
40 Press MENU, TRIGGER MENU, SINGLE.
41 When the analyzer finishes the sweep, notice the mean value.
42 Convert the measured linear magnitude mean value to log magnitude, using
this equation.
Power (dBm) = 20 * [log10(linear magnitude mean value)]
43 Write this calculated value on the "Performance Test Record."
In Case of
Difficulty
1Perform the "ADC Linearity Correction Constants (Test 52)," located in the
"Adjustments and Correction Constants" chapter of the Agilent 8753D
Service Guide.
2Repeat the "Test Port Input Noise Floor Level" procedure.
3Suspect the A10 Digital IF assembly if the analyzer fails both test port input
noise floor tests.
4Refer to the Agilent8753D Service Guide for more troubleshooting
information.