Chapter 2 97
Adjustment Procedures
10. Frequency Response Adjustment
10. Frequency Response Adjustment
Assembly Adjusted
A15 RF assembly
Related Performance Tests
Displayed Average Noise Level Frequency Response
Description
A signal of the same known amplitude is applied to the spectrum
analyzer at several different frequencies. At each frequency, the DAC
controlling the flatness compensation amplifiers is adjusted to place the
peak of the displayed signal at the same place on the screen. With
firmware revisions greater than 920528, there are correction points at 2
MHz and 6 MHz. These points are outside frequency range of the
synthesized sweeper. The DAC values for these two points are set to a
fixed offset from the DAC value at 10 MHz. The DAC values are stored
in EEROM.
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