TM 11-6625-3087-12
CONTROL, INDICATOR,
FUNCTION
KEY
OR CONNECTOR
NOISE/DEMOD push button
Used for monitoring telecommunication signals or measuring noise levels on
46A
telecommunication signal message channels. When in use, push button lights.
Push for on. See paragraph 2-13 for additional information.
46B
Used to measure phase jitter of 1004HZ test tone on telecommunication signal
JITTER push button
message channels. When in use, SHIFT push button is on and JITTER push
button lights. Push for on. See paragraph 2-14 for additional information.
TONE 1004Hz push button
47A
Used to measure test tone level of telecommunication signals. When in use,
push button lights. Push for on. See paragraph 2-15 for additional information.
NOISE/TONE push button
47B
Used to measure noise levels in presence of 1004Hz test tone on
telecommunication signal message channels. When in use, SHIFT push button
is on and NOISE/TONE push button lights. Push for on. See paragraph 2-16
for additional information.
CARRIER push button
Used to measure telecommunication carrier leak signals. When in use, push
48A
button lights. Push for on. See paragraph 2-17 for additional information.
48B
IMPULSE push button
Used to count telecommunication signal message channel noise spikes. When
in use, SHIFT push button is on and IMPULSE push button lights. Push for
on. See paragraph 2-18 for additional information.
49A
2600Hz push button
Used to measure telecommunication signaling tones. When in use, push button
lights. Push for on. See paragraph 2-15 for additional information.
49B
Used with impulse to start counting noise spikes. When in use, SHIFT and
START push button
IMPULSE push buttons are on but START push button does not light when
pushed. Push for on.
BRIDGED push button
Used to select balanced 600
input for 600
connector. Termination impedance
50
is 10K shunted by 50pF. When in use, push button lights. Push for on.
51
600 push button
Used to select balanced floating input for 600 connector. Termination
impedance is 600
. When in use, push button lights. Push for on.
52
600
connectors
Used to connect bridged or 600 source to Level Meter when 600 termination
impedance is required. Connector mates with WECO type 310 plug.
2-9
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