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4-16
Performance Tests
6. Test Port Input Noise Floor Level
2
Press
PRESET
,
MENU
,
POWER
,
–85
,
x1
,
STOP
,
3
,
G/n
.
3
Press
MEAS
,
INPUT PORTS
,
A
,
TESTPORT 2
,
FORMAT
,
LIN MAG
,
SCALE REF
,
AUTO SCALE
.
4
Press
MARKER FCTN
,
MARKER MODE MENU
,
STATS ON
,
MENU
,
TRIGGER MENU
,
SINGLE
.
5
When the analyzer finishes the sweep, notice the mean value (which appears
on the analyzer display).
6
Convert the measured linear magnitude mean value to log magnitude, using
this equation.
Power
(
dBm
) = 20 * [log
10
(
linear magnitude mean value
)]
7
Write this calculated value on the "Performance Test Record."
Port 1 Noise Floor Level from 50 kHz to 3 GHz (IF BW= 10 Hz)
8
Press
AVG
,
IF BW
,
10
,
x1
to change the IF bandwidth to 10 Hz.
9
Press
MENU
,
TRIGGER MENU
,
SINGLE
.
10
When the analyzer finishes the sweep, notice the mean value.
11
Convert the measured linear magnitude mean value to log magnitude, using
this equation.
Power
(
dBm
) = 20 * [log
10
(
linear magnitude mean value
)]
12
Write this calculated value on the "Performance Test Record."
Port 2 Noise Floor Level from 50 kHz to 3 GHz (IF BW= 10 Hz)
13
Press
MEAS
,
INPUT PORTS
,
B
,
TESTPORT 1
,
FORMAT
,
LIN MAG
.
14
Press
MENU
,
TRIGGER MENU
,
SINGLE
.
15
When the analyzer finishes the sweep, notice the mean value.
16
Convert the measured linear magnitude mean value to log magnitude, using
this equation.
NOTE
Notice that the mean value that is displayed on the analyzer is in
µ
Units. So, for exam-
ple, if the displayed value is 62
µ
U, the value that you would put in the equation is
(62
×
10
–6
).