70 Chapter2
Making Adjustments
9. CAL AMPTD Adjustment Routine
9. CAL AMPTD Adjustment Routine
This adjustment applies to:
All 8590 E-Series and L-Series spectrum analyzers
8591C cable TV analyzers
8594Q QAM analyzers
The
CAL AMPTD softkey accesses an internal self-adjustment routine.
The following adjustments are automatically performed by
CAL AMPTD.
• The reference level is calibrated by adjusting the gain of the IF
section.
• The 3 dB resolution bandwidths are adjusted.
• Bandwidth amplitude errors are determined. Errors are corrected
with video offsets.
• Step-gain and input-attenuator errors are determined. Errors are
corrected with video offsets.
• Log fidelity is checked in 1 dB steps. Errors are corrected with video
offsets.
• Frequency accuracy is tested and adjusted by using frequency
offsets.
Equipment
Cable, BNC, 20 cm (9 in)
Adapter, Type N (m) to BNC (f)
Additional Equipment for Option 026
Adapter, Type APC-3.5 (f) to APC-3.5 (f)
Additional Equipment for 75 Ω Input
Cable, BNC, 75 Ω, 30 cm (12 in)
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