TM 11-6625-847-45
TUNE control R1 controls the level of the dc voltage to
contact terminal 2 of LOAD/ ANT. TUNE switch S5. The
c. When testing the driver assembly on the, AM-
ANT. LOAD/ ANT. TUNE switch connects to pin 30 of J22
349/GRC-106, DRIVER TEST SELECTOR switch S2
when set to ANT. LOAD, or to pin 28 of J2 when set ANT.
controls the selection of test points HI and LO for voltage
TUNE. PA METER TEST ALC METER control R2
measurements at connector J3 on the A1AT1 attenuator
controls the level of the dc voltage to pins A3, 27, and 32
assembly. Position 1 of the TEST SELECTOR switch
of connector J2 (fig. 6-13).
connects the test points to pin 2, connector A1AT1J3, for
ac filament voltage. With switch S2 in position 2, the test
e. Testing the inputs to the antenna coupler
points are connected to pin 1 of A1AT1J3 for + 200-volt
dc B + voltage measurements. Position 3 connects the
assembly at connector J3, AM-3349/GRC, CONTROL
test points to pin 4 of A1AT1J3 for meter voltage
TEST RF BAND/50 a /WHIP switch S2 selects the pans
measurements across load resistor A2R1. Position 4
on connector J3 monitored by CONTROL TEST indicators
monitors the + 27 vdc bias input voltage to the driver
Al through A5, B1, and B2 for the three positions of the
module. Position 5 connects the test points across
switch, CONTROL TEST ANT. MOTOR CONTROL
resistor A2R1 to ca the current-resistance (IR) drop which
CODE switch S4 grounds pin 23 of connector J3 when in
determines driver current. DRIVER BAND S switch A151
the RF BAND position, and pin 12 when in the CAP
selects, mechanically, load transformers for testing the
position. CONTROL TEST ANT. MOTOR CONTROL
output of the driver assembly at 3.25 me, 15.5 me, and
MONITOR switch S3 selects the pins of J8 monitored by
29.5 mc.
CONTROL TEST indicators B5 and C1. CONTROL
TEST indicator B5 indicates a ground at pin 14 on
connector J3 when S3 is set to CAP. or one at pin 22
d. For
discriminator
assembly
test
DIS
when S3 is set to RF BAND. CONTROL TEST indicator
CRIMINATOR. TEST SELECTOR itch S3 controls the
C1 indicates voltage at pin 14 on connector J3 when S3 is
selection
of DISCRIMINATOR test points HI and
set to CAP. or voltage at pin 22 when S3 is set to RF
LO for voltage measurements of the discriminator
BAND.
assembly at connector J3. Position 1 of the switch S3
connects the test points across connector J8, pins 7 and
1-24.
Driver, Discriminator, and Antenna Coupler
1; position 2 connects the test points across connector J3,
Tray A1AS
pins 8 and 2; position 3 measures the signal at pin 10 of
connector TS.
Note.
Prefix reference designators with driver,
e. When testing the RELAY assembly connected to
discriminator, and antenna coupler tray A1A5 refer mc
connector J10, RELAY CONTROL switch S4 supplies
designator A1A5, unless specified
ground to pi 5, 9, 2, and 11 of connector J10, in position
2, 3, 4, and 5, respectively. Position I is open. RELAY
Indicator 1 indicates + 27-volt &at pin 6 of J10; RELAY
connectors, indicators, stimulus inputs, and test points
indicators 2 through 6 indicate, ground at pins 7, 8, 4, 1,
available on tray A1A5 for testing the relay assembly,
and 8, respectively; RELAY indicator 7 ground at pin 12
antenna coupler driver assembly, and discriminator
J10.
assembly on the AM-349/GRC-106.
ANTENNA COUPLER CODE switch S5 for the simulation
from the test set is controlled by POWER switch S1. The
of coding information to the pins of connector J11
ON position of POWER switch S1 supplies + 27-volt dc
selected by the ANTENNA COUPLER 50 Ω DUMMY
primary power to POWER indicator DS1; to contact
LOAD/COUPLER TERMINATION WHIP/50 Ω DOUBLET
terminal 4 of DRIVER TEST SELECTOR switch S2; to
switch S6.
ANTENNA COUPLER CAP.
MOTOR
RELAY indicator 1; and to pin 40 of connector J1,
indicator DS3 indicates a ground at pin 12 and + 27-volt
energizing the converter section of the dc-to-dc converter
dc at pin 14 of J11. ANTENNA (COUPLER BAND SW
and regulator module A3 on the test set.
MOTOR indicator DS4 indicates a ground at pin 22 and +
27-volt dc at pin 28 of connector J11.
1-22
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