HP Cable Box 8591C manual Turning on the Analyzer for the First Time, Reference Connector

Turning on the Analyzer for the First Time

When you turn the cable TV analyzer on for the first time, you should perform frequency and amplitude self-calibration routines to generate correction factors and indicate that the unit is functioning correctly. The cable TV analyzer should be allowed to warm-up for 30 minutes before performing the self-calibration routines. See “When Is Self-Calibration Needed?” in Chapter 2 for helpful guidelines on how often the self-calibration routines should be performed.

Perform the following steps:

1.Ensure the reference connector is connected between the 10 MHz OUTPUT and EXT REF IN rear-panel connectors. See Figure l-4.

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Figure 1-4. Reference Connector

If you wish to use an external 10 MHz source as the reference frequency, disconnect the reference connector from the rear-panel and connect an external reference source to the EXT REF IN connector on the rear panel.

2. Plug the power cord into the cable TV analyzer.

3. Press ILINE).

After a few seconds, the screen displays the Ermware revision date in the YYMMDD format. For example, 930522 indicates May 22, 1993. The baud rate (RS232 : XXXX) is also displayed.

If your cable TV analyzer is equipped with Option 021 (HP-IB interface), the appropriate interface address (HP-IB ADRS : XX) in place of the baud rate, also appears on the screen.