172 Chapter2
Making Adjustments
28. Correcting for Absolute Amplitude Accuracy for Option 051
3. Press ⇑ (step up key) until the ERROR readout for 804 MHz is
displayed (781 MHz for an 8591E spectrum analyzer or an 8591C
cable TV analyzer).
4. Read the amplitude error from the display and record it in Table
2-26 for the 8593E, 8594E, 8595E, and 8596E spectrum analyzers.
Use Table 2-27 for 8591E spectrum analyzers or 8591C cable TV
analyzers.
Repeat step 3 to step 4 for the next frequency indicated in Table 2-26
or Table 2-27 until all four points have been recorded.
5. Subtract the Average Error, calculated in step 1, from each
Amplitude ERROR from Table 2-26 or Table 2-27, then record
column 3 as the Corrected Flatness ERROR.
Do not subtract more than 0.5 dB from the Amplitude ERROR. If the
Average Error is more than 0.5 dB, it may not be possible to make
corrections during the adjustment.
6. Using
⇓ (step down key), set the frequency displayed on the analyzer
to 804 MHz (781 MHz for 8591E spectrum analyzers or 8591C cable
TV analyzers).
Table 2-26 Frequency Response Errors: 8593E, 8594E, 8595E, 8596E
Frequency Amplitude
ERROR
Corrected
Flatness
ERROR
804 MHz _________________ _________________
876 MHz _________________ _________________
948 MHz _________________ _________________
1.02 GHz _________________ _________________
Table 2-27 Frequency Response Errors: 8591C and 8591E
Frequency Amplitude
ERROR
Corrected
Flatness
ERROR
781 MHz _________________ _________________
818 MHz _________________ _________________
855 MHz _________________ _________________
892 MHz _________________ _________________
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