HP 70908A, Руководство по обслуживанию

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T est 07. Harmonics Out 21.4 MHz P ort
The purpose of this verication test is to measure and compare amplitudes of fundamental and
harmonic frequencies at the 21.4 MHz OUT .
This test is dependent upon the repair , replacement, and/or adjustment of the
A11 last converter.
1. Connect the equipment as shown in the test setup illustration for this procedure .
2. Set the mainframe line switch to ON.
3. Load and run T est 07. Harmonics Out 21.4 MHz P ort. Refer to Chapter 2 for information
about running the software .
When performing this verication test, the full microwave source provides 300 MHz, 0 dBm ,
at the DUT RF INPUT . The DUT frequency band is 1H0. The synthesized source provides
300 MHz, 2 dBm, at the DUT 300 MHz IN. The local oscillator source tunes to center the RF
INPUT signal. The calibrated spectrum analyzer measures the amplitude of the fundamental
and the rst three harmonics of the 21.4 MHz signal. A routine subtracts the amplitude of each
harmonic from the amplitude of the fundamental , and then compares the dierence with a
test limit.
The procedure repeats in the 1H0 band with 300 MHz, 2 dBm at the RF INPUT , and then again
in the 1L0 bandwidth 4 GHz at the RF INPUT .
Module V erication T ests 8-17