HP 8590 E-Series, Calibration Manual

Page: 265 / 693

34. Gain Compression, HP 8591EM
This performance verication test must be performed with the EMC analyzer set
in the spectrum analyzer mode.
Gain compression is measured by applying two signals , separated by 3 MHz.
First, the test places a 020 dBm (87 dBV) signal at the input of the EMC
analyzer (the EMC analyzer reference level is also set to 87 dBV). Then, a 0
dBm (107 dBV) signal is applied to the EMC analyzer , overdriving its input.
The decrease in the rst signal's amplitude (gain compression) caused by the
second signal is the measured gain compression.
F or the narrow bandwidth part of this test, the signals are separated by 10 kHz,
then the rst signal is kept 10 dB below the reference level.
There are no related adjustment procedures for this performance test.
Equipment Required
Synthesized sweeper
Synthesizer/level generator
Measuring receiver (used as a power meter)
P ower sensor , 100 kHz to 1800 MHz
Directional bridge
Cable , BNC, 120 cm (48 in) (two required)
A dapter , Type N (f) to BNC (m)
A dapter , Type N (m) to BNC (m)
A dapter , Type N (f) to APC 3.5 (f)
A dapter , Type N (m) to BNC (f)
2-236 P erformance V erication T ests