User`s guide

1-46 Chapter1
System Verification and Performance Tests
Performance Tests
Port 1 Noise Floor Level from 300 kHz to 3 GHz
(IF BW = 3 kHz)
1. Connect the equipment as shown in Figure 1-18.
Figure 1-18 Source Input Noise Floor Test Setup
2. Press Preset.
3. Press Meas, SELECT PORTS [1–2].
4. Press Avg, IF BW, 3, k/m, Power, –85, x1, Stop, 3, G/n.
5. Press Meas, INPUT PORTS, A, TESTPORT 2, Format, LIN MAG, Scale Ref,
AUTO SCALE
.
6. Press Marker Fctn, MARKER MODE MENU, STATS ON, Sweep Setup,
TRIGGER MENU, SINGLE
.
7. When the analyzer finishes the sweep, notice the mean value that
appears on the analyzer display.
8. Convert the measuredlinear magnitude mean value to logmagnitude
using the following equation:
Power (dBm) = 20 x [log
10
(linear magnitude mean value)]
NOTE Notice that the mean value displayed on the analyzer is in µUnits. If the
displayed value is 62µU, the value you would put in the equation is
(62 x 10
−6
).