Section 9 Maintenance
9-16
(3) Test method
[Procedure]
1. Set MT8820A to the non-modulation CW output (command: MOD OFF)
through GPIB control from PC.
2. Set the output level for fundamental wave and the measurement frequency
to MT8820A.
3. Adjust the reference level to the fundamental wave as shown in the figure
below.
Fundamental wave Non-harmonic
Harmonics Harmonics Harmonics
Fig. 9-1-9-2 Fundamental wave level
4. Set the spectrum analyzer to the delta marker mode and move the current
marker to the highest-level non-harmonics over 100 kHz of the offset fre-
quency and perform pass/fail evaluation with the level difference.
9.1.10 Harmonics
The test for harmonics is explained here.
(1) Test object specification
Table 9-1-10-1 Specification of the Harmonics
Item Specification
Harmonics ≤−25 dBc
(2) Setup
Connect the equipment as shown in Table 9-1-9-1. Setup the PC to enable
control of MT8820A via GPIB interface.
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