HP 8590 E-Series User Manual page 37

Caution
Turn off the spectrum analyzer before connecting the AUX INTERFACE
connector to a device. Failure to do so may result in loss of factory-correction
constants.
Do not exceed the current limits for the +5 V supply when using the AUX
INTERFACE connector. Exceeding the current limits may result in loss of
factory-correction constants.
Do not use the AUX INTERFACE as a video monitor interface. Damage to the
video monitor will result.
Interface connectors are optional interfaces for HP-IB and parallel (Option 041) and
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RS-232 and parallel (Option 043) interface buses. They support remote instrument
operation, direct plotting or printing, and parallel printing of screen data.
18 AUX IF OUTPUT is a 500, 21.4 MHz IF output that is the down-converted signal of the
RF input of the spectrum analyzer. Amplitude-correction factors are not applied to this
signal.
AUX VIDEO OUTPUT provides detected video output (before the analog-to-digital
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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.
20 EXT TRIG INPUT ('ITL) accepts the positive edge of an external voltage input that
triggers the spectrum analyzer internal sweep source.
HIGH SWEEP IN/OUT ('ITL) indicates when the spectrum analyzer is sweeping or can
21
be grounded to stop sweeping.
22 EXT KEYBOARD connector is provided with the optional interface connector. The
external keyboard is not included with the spectrum analyzer. The external keyboard
can be used to enter screen titles, prefixes, remote commands, and writing simple DLP's.
For Options 041 or 043 only.
Caution
Turn off the spectrum analyzer before connecting an external keyboard to the
spectrum analyzer.
SWEEP OUTPUT provides a voltage ramp proportional to the sweep and the spectrum
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analyzer span (0 V to 10 V).
Getting Started 2-7