HP Cable Box 8591C manual Getting Started

Getting Started

Getting Acquainted with the Analyzer

C A U T I O N

12AUX INTERFACE provides a nine-pin “D” subminiature connector for control of external devices. Refer to the specifications and characteristics in your calibration guide for a more detailed description.

13Interface connectors interfaces for RS-232 (standard) and HP-IB (Option 021) interface buses that support remote instrument operation and direct plotting or printing of screen data.

14AUX IF OUTPUT is a 50 62, 2 1.4 MHz IF output that is the down-converted signal of the RF input of the cable TV analyzer. Amplitude-correction factors are not applied to this signal.

15AUX VIDEO OUTPUT provides detected video output (before the analog-to-digital conversion) proportional to vertical deflection of the trace. Output is from 0 V to 1 V. Amplitude-correction factors are not applied to this signal.

16EXT TRIG INPUT (TTL) accepts the positive edge of an external voltage input that triggers the cable TV analyzer internal sweep source.

17HIGH SWEEP IN/OUT (TTL) indicates when the cable TV analyzer is sweeping or can be grounded to stop sweeping.

18EXT KEYBOARD connector is provided with the interface connector. The external keyboard is not included with the cable TV analyzer. The external keyboard can be used to enter screen titles, prefixes, remote commands, and writing simple DLP’s.

Turn off the cable TV analyzer before connecting an external keyboard to the cable TV analyzer. Failure to do so may result in loss of factory-correction constants.

19SWEEP OUTPUT provides a voltage ramp proportional to the sweep and the cable TV analyzer span (0 V to 10 V).

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