Chapter 2 297
Performance Verification Tests
34. Gain Compression: Agilent E4404B, E4405B, E4407B, and E4408B
8. Repeat step 3 through step 7 for each of the settings listed in
Table 2-79. Use the directional bridge in place of the coupler for
frequencies less than or equal to 2503 MHz. The test at 50 MHz with
a span of 1 kHz is only for E4404B, E4405B or E4407B with Option
1DR.
9. Disconnect the power sensor from the directional bridge and connect
the directional bridge to the input of the analyzer using an adapter.
Do not use a cable.
10.Set the synthesized sweeper 2 power level to Off.
11.Set the synthesized sweeper 1 power level to −24 dBm.
12.Press Preset on the analyzer. Press the Factory Preset softkey, if it is
displayed. Press System, Alignments, Auto Align, Off. Set the analyzer
by pressing the following keys:
FREQUENCY, Center Freq, 50 MHz (or as indicated in Table 2-80)
SPAN, 150 kHz (or as indicated in Table 2-80)
AMPLITUDE, Ref Level, –10 dBm, Attenuation 0 dB
AMPLITUDE, Scale/Div, 10 dB
BW/Avg, Res BW, 30 kHz (or as indicated in Table 2-80)
BW/Avg, Video BW, 300 Hz (or as indicated in Table 2-80)
13.On the synthesized sweeper 2, set the appropriate power level to the
setting recorded in Table 2-79. Then set RF to Off.
14.On the analyzer, press Peak Search (or Search).
15.Adjust the power level of the synthesized sweeper 1 to achieve a
marker amplitude reading within 0.5 dB of the value indicated in
Table 2-79. The marker amplitude is the uncompressed amplitude.
16.On the analyzer, press the following keys:
Peak Search (or Search)
Marker
Delta
17.On the synthesized sweeper 2, set RF to On. The amplitude should
be the same as recorded in Table 2-79.
18.On the analyzer, press Peak Search (or Search). This is the
compressed amplitude. The marker delta (∆ Mkr1) amplitude is the
measured gain compression.
19.Record the measured gain compression in the performance test
record as the Entries indicated in Table 2-80.
20.Repeat step 10 through step 19 for each set of settings in Table 2-79
and Table 2-80 for frequencies less than or equal to 2503 MHz.
c. Agilent E4407B and E4408B only.