TM 11-6625-3087-12
CONTROL, INDICATOR,
FUNCTION
KEY
OR CONNECTOR
VOLUME knob
Used to vary audio level to speaker and headphone jack. Clockwise rotation
83
raises volume and counterclockwise rotation lowers volume.
400Hz push button
84
Used to measure 400Hz section of input signal. When in use, push button
lights. Push for on.
85
3100Hz push button
Used to measure 3100Hz section of input signal. When Jitter on, measures
20Hz to 300Hz. When in use, push button lights. Push for on.
86
Loudspeaker
Used for audio monitoring of input signals or impairment measurements.
Headphone connector
87
Used to audio monitoring of input signals or impairment measurements through
headphones. Output impedance is 600 and output power is 0dBm. Connector
mates with 1/4" phone plug.
WTD 3100Hz push button
88
Used to measure noise in 3100Hz section of input signal on telephone message
channels. When making phase jitter measurements, bandwidth is 4Hz to 300Hz.
When in use, push button lights. Push for on.
2-15
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