Getting Started

Improving Accuracy with Self-Calibration Routines

2.On the cable TV analyzer, press m and CAL FREQ & AMPTD Cal signal not found will be displayed if CAL OUT is not connected to the cable TV analyzer input. The frequency and amplitude self-calibration functions take approximately 5 minutes to finish (9 minutes with Option

130)at which time the internal adjustment data is in working RAM.

3.To save this data in the area of cable TV analyzer memory that is saved when the cable TV analyzer is turned off, press CAL STORE

N O T E

To interrupt the calibration routines started bv CAL FREQ , CAL AMPTD , or

CAL FREQ $ AMPTD , press [PRESET), (CAL), More 1 of 4, and CAL FETCH.

CAL FETCH retrieves the previous correction factors. Improperly interrupting the self-calibration

routines may result in corrupt correction factors. (If this occurs, press CAL FREQ & AMPTD to rerun the frequency and amplitude self-calibration routines.)

The frequency and amplitude self-calibration functions cm be done separately by using the CAL FREQ or CAL AMPTD softkeys instead of

CAL FREQ i& AMPTD

N O T E

If the frequency calibration CAL FREQ and the amplitude calibration CAL AMPTD self-calibration routines are used, the frequency calibration should be performed before the amplitude calibration, unless the frequency data is known to be accurate.

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HP Cable Box 8591C manual Improving Accuracy with Self-Calibration Routines