102 Chapter2
Making Adjustments
15. Frequency Response of the 8590L, 8591C, and 8591E
23.Adjust the frequency synthesizer AMPLITUDE for a MKR
amplitude reading of −14.00 dBm±.05 dB. Record the frequency
synthesizer AMPLITUDE setting here.
AMPLITUDE setting (4 MHz)____________________dBm
24.Subtract the frequency synthesizer AMPLITUDE setting (4 MHz)
recorded in step 23 from the frequency synthesizer AMPLITUDE
setting (41 MHz) recorded in step 20. Record the result as the
Amplitude Relative to 41 MHz here.
4 MHz Amplitude Relative to 41 MHz____________________dBm
25.Add the result from step 24 to the reading from step 10 and enter
that result in Column 2 of Table 2-6 (Option 001 only: Column 5) as
the 4 MHz error (relative to 300 MHz).
75 Ω input only: Starting with the error at 41 MHz, add Column 3
(System Error) to Column 2 (Error Relative to 300 MHz) and record
the result in Column 5 (Corrected Error Relative to 300 MHz).
Entering Flatness Correction Data
26.Enter the pass code by pressing the following analyzer keys.
PRESET
FREQUENCY, −2001, Hz
75 Ω input only: AMPLITUDE, More 1 of 2, AMPTD UNITS, dBm
27.To access the flatness correction menu, press the following analyzer
keys.
CAL, More 1 of 4, More 2 of 4
SERVICE CAL
FLATNESS DATA
Perform the next step only if all the flatness correction data must be
replaced in memory due to the repair or replacement of the A16
processor/video assembly.
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