TM 11-5805-424-15/NAVELEX 0967-220-9010/TO 31W2-2G-41
(3) Operate the digital data transmitting
(12) Adjust the OUTPUT LEVEL ADJ control
until the ME-30A/U indicates the desired output level;
equipment.
then, disconnect the ME-30A/U and the oscilloscope.
(4) Adjust the OUTPUT LEVEL ADJ control
(13) Connect
the
attentuator
between
terminals 12 and 15 of terminal board TB2 (fig. 2-2).
level (between +3 decibels (referred to 1 milliwatt in 600
ohms) (dBm) and -20 (dBm)).
(14) Connect the ME-30A/U to terminals 15
and 16 of terminal board TB2.
(5) Disconnect the ME-30A/U.
(15) Connect the oscilloscope (set to observe
d. Alarm Adjustments.
a 2-second pulse) between jack J4 on assembly A9 (fig.
(1) Connect the oscilloscope between jack J3
of assembly A12 (fig. 1-5) and ground.
(16) Adjust the attenuator until the ME30A/U
(2) Operate the oscilloscope to observe a
indicates the desired receive carrier level.
5second pulse.
(17) Adjust the attenuator until the ME30A/U
(3) Operate the INPUT SELECT switch (fig.
indicates 20 dB less than the desired receive carrier
level.
TRANSMIT control to obtain a ground level indication
(18) Adjust the REC CARRIER ALARM
on the oscilloscope 5 seconds 5 percent after the
THRESHOLD control (fig. 2-3) until the oscilloscope
INPUT SELECT switch is operated; then, disconnect the
indicates a continuous +6-volt level; then, slowly reverse
oscilloscope.
the adjustment direction until the oscilloscope indicates
(4) Connect the oscilloscope between jack J4
a -6 volt level.
on assembly A11 (fig. 1-5) and ground.
(19) Adjust the attenuator for the desired
(5) Operate the INPUT SELECT switch (fig.
receive carrier level; the oscilloscope will indicate -6
volts dc.
RECEIVE control to obtain a ground level indication on
(20) Adjust the attenuator until the ME30A/U
the oscilloscope 5 seconds 5 percent after the INPUT
indicates 20 dB less than the desired receive carrier
SELECT switch is operated; then, disconnect the
level. Adjust the REC CARRIER ALARM TIME control
oscilloscope.
(6) Connect the ME-30A/U across terminals
seconds after the attenuator is operated.
12 and 13 of terminal board TB2 (fig. 2-2).
e. Oven Temperature Adjustments.
(7) Connect the oscilloscope (set to observe
a 2-second pulse) between jack J4 on assembly A6 (fig.
(1) General. Oven temperature has been
pre-set at the factory or depot and R1 (figs. 2-6, 2-7 or
2-8) is locked and staked with varnish. Readjustment
(8) Adjust the OUTPUT LEVEL ADJ control
should normally not be required. When temperature
reading or readjustment is considered necessary it
below the desired output level (c above).
should be performed only in accordance with procedure
(9) Adjust the XMIT ALARM THRESHOLD
provided in (2) below.
control (fig. 2-3) until the oscilloscope indicates a
continuous ground level; then, slowly reverse the
CAUTION
adjustment direction until the oscilloscope indicates a
Setting of R1 should not be changed
positive level.
unless done in accordance with
(10) Adjust the OUTPUT LEVEL ADJ control
procedure.
Adjustment of R1
without use of proper temperature
the oscilloscope will indicate a positive level.
indicator can result in high oven
(11) Adjust the OUTPUT LEVEL ADJ control
temperature, which will seriously
damage or destroy components
desired output level.
Adjust the XMIT CARRIER
within the oven assembly.
ALARM TIME control (fig. 2-3) to obtain a ground level
indication on the oscilloscope 2 seconds after the
OUTPUT LEVEL ADJ control is operated.
Change 6
2-8
