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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 * [log
10
(
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 * [log
10
(
linear magnitude mean value
)]
43
Write this calculated value on the "Performance Test Record."
In Case of
Difficulty
1
Perform the "ADC Linearity Correction Constants (Test 52)," located in the
"Adjustments and Correction Constants" chapter of the
Agilent 8753D
Service Guide
.
2
Repeat the "Test Port Input Noise Floor Level" procedure.
3
Suspect the A10 Digital IF assembly if the analyzer fails both test port input
noise floor tests.
4
Refer to the
Agilent 8753D Service Guide
for more troubleshooting
information.