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 SB 740-91-01
Step
Settings and Instructions
Normal Indication
1
(d) On both RT-841/PRC-77's, set the controls as
(cont.)
follows:
(1) Function switch to "ON"
(2) Frequency selector to 30 MHz.
(3) "MODE" switch to "ON."
(4) Adjust "VOLUME" control to comfortable
listening level.
(e) Press the H-189/GR(H-250/U) push-to-talk
Observe audio quality
switch, and speak into the handset
and sidetone, and re-
cord presence of exces-
sive noise and hum.
(f) On both RT-841/PRC-77's, set the controls as
No audio should be
follows:
heard on the handset.
(1) Frequency selector to 53.0 MHz.
(2) "MODE" switch to "SQUELCH."
(g) Press the H-189/GR push-to-talk switch, speak
into the handset. Observe squelch function and
audio quality.
(h) On both RT-841/PRC-77's, set the controls as
No audio should be
follows:
heard on the handset.
(1) Frequency selector to 75.0 MHz.
(2) "MODE" switch to "RETURN."
(i) Press the H-189GR push-to-talk switch, speak into
the handset. Observe squelch and audio quality.
(j) On both RT-841/PRC-77's, set the controls as
No audio should be
follows:
heard on the handset.
(1) Switch to "LOW BAND."
(2) Frequency selector to 52.0 MHz.
(3) "MODE" switch to "SQUELCH."
(k) Press the H-189/GR push-to-talk switch, speak
into the handset. Observe squelch function
and audio quality.
(1) On both RT-841/PRC-77's hold "MODE" switch to
Frequency dial will be
"LITE" position
illuminated until the
spring loaded "MODE"
switch is released.
2
Squelch Sensitivity
(a) Connect the test equipment as shown in
(b) On the ME-26B/U, set controls as follows:
Function Switch: Ohms
B-58
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