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Getting Started
Improving Accuracy with Self-Calibration Routines
The CAL FREQ softkey starts the frequency self-calibration routine.
This routine adjusts the frequency, sweep time, and span accuracy in
approximately 2 minutes.
The CAL AMPTD softkey starts the amplitude calibration routine. This routine
takes approximately 3 minutes (7 minutes with Option 130) to adjust the
bandwidths, log and linear switching, IF gains, IF frequency centering, RF
attenuation, and log ampliher. When the amplitude calibration routine has
Enished, the preset display returns and CAL DONE is displayed.
Although the cable TV analyzer stores the correction factors in battery-backed
RAM, the data will not be saved when the cable TV analyzer power is turned
off unless the data has been stored with CAL STORE Using CAL STORE
stores the correction factors in an area of cable TV analyzer memory that
is accessed when the cable TV analyzer is turned on. After the frequency
and amplitude self-calibration routines are complete, CORR (corrected) now
appears on the left side of the screen, indicating that the cable TV analyzer is
using its frequency and amplitude correction factors. Correction factors can
be turned off by pressing CORRECT ON OFF . When OFF is underlined, most
amplitude correction factors and some frequency correction factors are not
used.
If the self-calibration routines cannot be performed, see “Check the Basics” in
Chapter 8.
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