260
Chapter 9
Performance Verification Tests
15. Gain Compression
15. Gain Compression
Gain compression is measured by applying two signals, separated by
3 MHz. First, the test places a
−
26 dBm signal at the input of the
spectrum analyzer (the spectrum analyzer reference level is set to
−
10 dBm). Then, a 0 dBm signal (46.75 dBmV for 75
Ω
) is applied to the
spectrum analyzer, overdriving its input. The decrease in the first
signal’s amplitude (gain compression) caused by the second signal is the
measured gain compression.
There are no related adjustment procedures for this performance test.
Equipment Required
Synthesized sweeper
Synthesized signal generator
Measuring receiver (used as a power meter)
Power sensor, 100 kHz to 1500 MHz
Directional bridge
Cable, BNC, 120-cm (48-in) (2 required)
Adapter, Type-N (f) to BNC (m)
Adapter, Type-N (m) to BNC (m)
Adapter, Type-N (f) to APC 3.5 (f)
Adapter, Type-N (m) to BNC (f) (2 required)
Additional Equipment for 75
Ω
Input
Power sensor, 75
Ω
Adapter, Type-N (f), to BNC (m), 75
Ω
Adapter, BNC (m), to BNC (m), 75
Ω
Procedure
1. Zero and calibrate the measuring receiver and 100 kHz to 1500 MHz
power sensor combination in log mode (power reads out in dBm) as
described in the measuring receiver operation manual. Enter the
power sensor’s 50 MHz Cal Factor into the measuring receiver.
75
Ω
Input only: Calibrate the 75
Ω
power sensor.
2. Connect the equipment as shown in
Figure 9-17
, with the load port
of the directional bridge connected to the power sensor.
Содержание ESA-L1500A
Страница 12: ...11 1 Preparing for Use and Printing ...
Страница 28: ...27 2 Getting Started ...
Страница 44: ...Chapter 2 43 Getting Started Making a Measurement Figure 2 5 Reading the Amplitude and Frequency ...
Страница 47: ...46 Chapter2 Getting Started Analyzer Battery Information ...
Страница 48: ...47 3 Troubleshooting ...
Страница 54: ...Chapter 3 53 Troubleshooting How to Return Your Analyzer for Service Figure 3 1 ...
Страница 117: ...116 Chapter4 Front Panel Key Reference Trig ...
Страница 118: ...117 5 Menu Maps ...
Страница 119: ...118 Chapter5 Menu Maps ...
Страница 120: ...Chapter 5 119 Menu Maps ...
Страница 121: ...120 Chapter5 Menu Maps ...
Страница 122: ...Chapter 5 121 Menu Maps ...
Страница 124: ...Chapter 5 123 Menu Maps ...
Страница 125: ...124 Chapter5 Menu Maps ...
Страница 127: ...126 Chapter5 Menu Maps a Frequency is replaced with Time when the X Axis Units Freq Time selection is Time ...
Страница 128: ...Chapter 5 127 Menu Maps ...
Страница 129: ...128 Chapter5 Menu Maps ...
Страница 130: ...Chapter 5 129 Menu Maps ...
Страница 131: ...130 Chapter5 Menu Maps ...
Страница 135: ...134 Chapter5 Menu Maps ...
Страница 136: ...135 6 Options and Accessories ...
Страница 145: ...144 Chapter6 Options and Accessories Accessories ...
Страница 146: ...145 7 Specifications ...
Страница 179: ...178 Chapter7 Specifications Regulatory Information ...
Страница 180: ...179 8 Required Equipment ...
Страница 187: ...186 Chapter8 Required Equipment Test Equipment ...
Страница 308: ...307 10 Performance Verification Test Record ...
Страница 321: ...320 Chapter10 Performance Verification Test Record HP ESA L1500A Performance Verification Test Record ...