HP ESA-L1500A, User'S And Calibration Manual

Page: 289 / 326

288 Chapter 9
Performance Verification Tests
21. Absolute Amplitude, Vernier, and Power Sweep Accuracy, Options 1DN and 1DQ
21. Absolute Amplitude, Vernier, and Power
Sweep Accuracy, Options 1DN and 1DQ
A calibrated power sensor is connected to the tracking generator output
to measure the power level at 50 MHz.
The measuring receiver is set for RATIO mode so that future power
level readings are in dB relative to the power level at 0 dBm. The
output power level setting is decreased in 1 dB steps and the power
level is measured at each step. The difference between the ideal and
actual power levels is calculated at each step.
Since a power sweep is accomplished by stepping through the vernier
settings, the peak-to-peak variation of the vernier accuracy is equal to
the power sweep accuracy.
Equipment Required
Measuring receiver
Power sensor, 100 kHz to 1500 MHz
Additional Equipment Required for 75
Ω
RF Out
Power sensor, 75
Ω
Adapter, Type-N (f) to BNC (m), 75
Ω
Procedure
1. Press
Preset
on the spectrum analyzer, then wait for the preset
routine to finish. Set the spectrum analyzer by pressing the
following keys:
Frequency
,
50 MHz
Span
,
Zero Span