HP (Hewlett-Packard) 8591C Cable Box User Manual


 
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Getting Started
Getting Acquainted with the Analyzer
and closes the gate directly: TTL high sets the gate on; TTL low sets
the gate off. When this input is unconnected, TTL is set high.
*
Option 107 only.
4
TV MON OUTPUT connector provides a connection for an external
television monitor.
5
EARPHONE connector provides a connection for an earphone jack
instead of using the internal speaker.
6
GATE OUTPUT (TTL) provides a TTL signal which indicates gate
status when the when the gate is in edge trigger mode. A high TTL
signal indicates the gate is on; a low TTL signal indicates the gate is
off. GATE OUTPUT is not active in level mode.
Rw
Option 107 only.
7
EXT REF IN accepts an external frequency source to provide the
10 MHz, -2 to + 10
dBm
frequency reference used by the cable TV
analyzer.
8
10 MHz REF OUTPUT provides a 10 MHz, 0
dBm
minimum,
time-based reference signal.
9
VOLTAGE SELECTOR adapts the unit to the power source: 115 V or
230 V.
10
MONITOR OUTPUT drives an external monitor with a signal (spectrum
analyzer display) that has a 15.7
kHz
horizontal synchronizing rate.
It can also be switched to provide an NTSC format output which
is compatible with VHS video recorders or a PAL format which is
compatible with PAL/SECAM video recorders.
11
Power input is the input for the line power source. Make sure that the
line-power source outlet has a protective ground contact.
CAUTION
Turn off the cable TV 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.
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