1. Performance Tests – Verifying Specifications
5071A Complete Performance Tests
16
D. Harmonic Distortion Check for the 100 kHz Output
Harmonics on the 100 kHz output signal must be more than 40 dBc below the
fundamental. To perform this check, a spectrum analyzer is tuned to the
fundamental frequency and an amplitude reference is established. The output
frequency spectrum is then examined to determine fundamental-to-sideband
amplitude relationship at harmonic points of the fundamental.
Equipment
HP/Agilent 3585B Spectrum Analyzer
Setup
Figure 1-6. 100 kHz Harmonic Distortion Test Setup
Specifications
All harmonics must be < 40 dBc with respect to the fundamental frequency.
Procedure
If you are using the HP/Agilent 3585B Spectrum Analyzer, follow the steps
below to test for harmonic signals on the 100 kHz output. If you are using a
different spectrum analyzer, use these steps as a guide for operation of that
analyzer.
1 Connect the 5071A 100 kHz output to the 3585B Spectrum Analyzer as
shown in Figure 1-6. Set the 3585B for 50 input impedance.
2 On the 3585B, perform the following steps:
a. Press the green “INSTR PRESET” button and allow the analyzer to go
through its auto range algorithm (this will take about 5 seconds).
b. Press the “STOP FREQ” button. Then set the stop frequency to 3 MHz
using the numeric and unit keys in the entry menu.
c. Press the “DSP LINE” button and move the display line to 40.0 dBc.
To Next Page
Loading...
