4-16
Performance Tests
6. Test Port Input Noise Floor Level
2Press PRESET, MENU, POWER, –85, x1, STOP, 3, G/n.
3Press MEAS, INPUT PORTS, A, TESTPORT 2, FORMAT, LIN MAG, SCALE REF, AUTO SCALE.
4Press MARKER FCTN, MARKER MODE MENU, STATS ON, MENU, TRIGGER MENU, SINGLE.
5When the analyzer finishes the sweep, notice the mean value (which appears
on the analyzer display).
6Convert the measured linear magnitude mean value to log magnitude, using
this equation.
Power (dBm) = 20 * [log10(linear magnitude mean value)]
7Write this calculated value on the "Performance Test Record."
Port 1 Noise Floor Level from 50 kHz to 3 GHz (IF BW= 10 Hz)
8Press AVG, IF BW, 10, x1 to change the IF bandwidth to 10 Hz.
9Press 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 * [log10(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 µUnits. So, for exam-
ple, if the displayed value is 62 µU, the value that you would put in the equation is
(62 × 10–6).