HP 8901B

Model 8901B Operation
Modulation Output/Audio Input
FUNCTIONS
AUDIO INPUT
Do not apply greater than 10 Vdc or greater than +30 dBm (1 watt) into
MODULATION OUTPUT/AUDIO INPUT
or damage to the instrument
may result.
NOTE
For optimum signal flatness, cables attached to MODULATION OUTPUT/
AUDIO INPUT (when used
as an output) should be terminated in 600R .
DESCRIPTION
Modulation Output
MODULATION OUTPUT/AUDIO INPUT provides a calibrated output for signals demodulated by
the Modulation Analyzer. The output
signal available at the connector usually corresponds to the
current modulation measurement. (The output
is dc coupled and has a 600Q output impedance into a
BNC female connector.)
Audio Input
The input at MODULATION OUTPUT/AUDIO INPUT also provides external access to the audio
measurement circuits. The input impedance
at the connector is 100 kR.
Modulation Output/Audio Input 3-187