TM 11-5805-424-15/NAVSHIPS 0967-220-9010/TO 31W2-2G-41
7-8. Alarm Tests
test MD-674(P)/G, and install the repaired plug-in module in its place.
a. Test Equipment and Material.
(2) Connect the equipment as shown in A and B of figure 7-3.
See Maintenance Allocation Chart Section III for test equipment.
(3) Strap, together, terminals TP4 and TP5 on PC assembly A1.
b. Test Connections and Conditions.
(4) Operate all POWER switches to the ON position.
(1) Remove the test MD-674(P)/G from its case, and install the repaired
MD-674(P)/G in its place, or remove the appropriate plug-in module from the
c. Procedure.
Step
Control settings
No.
Test equipment
Equipment under test
Procedure
Performance standard
PG-205A
BAUD RATE: As required.
a. Note indication on ME-30A/U
a. ME-30A/U should indicate between
ALARM: NORM.
+3 dbm and - 20 dbm.
1
CHARACTER RELEASE:
FREE RUN
INPUT: 600Ω.
DISTORTION: OFF
b. Connect ME-26A/U between test
b. Front panel ALARM indicator lamp
OUTPUT: 600Ω.
point TP8 on control bracket and
should light approximately 2
EXTERNAL: 37.5
1200
INPUT SELECT: DATA.
ground and adjust front panel
seconds after ME-26A/U indicates
OUTPUT LEVEL ADJ control
-15 volts.
PATTERN SELECTOR:
slowly until ME-26A/U changes
REVERSALS
from 13.5: volt indication to -15
BAUDS: As required
volts indication.
JACK SIGNAL SELECTOR:
c. Make a note of indication on ME-
c. ML-3A /U should indicate ap-
LOW LEVEL (MECH OFF).
30A/U.
Proximately 10 dbm less than
reading in a above.
DD-205A
d. Adjust front panel OUTPUT LEVEL
d. ME-30 A/U should indicate 5 dbm
ADJ control slowly until ALARM
( 1 dbm) less than indication in
TRANSITION SELECT:
indicator lamp is extinguished;
a. above.
make note of indication on ME-
Left hand: -SPACE
MARK
30/U.
Right hand: ALL.
DISTORTION SELECT:
AVG.
INPUT FILTER: OUT
EXTERNAL: .37.5
1200
INPUT POLARITY: As
required.
Toggle switch:
SYNCHRONOUS.
Change 3
7-9
