(1) The function of the antenna flag switch is to switch the
coupler RF input/output to the whip antenna connector J4 or to the
50-ohm antenna connector J3 when an antenna connection is made to one
of these jacks.
It mechanically prevents connection to the other
jack.
J1 is for connection of the RF cable to the power
amplifier.
J2 is for connection of the power and control cable to
the power amplifier.
J3 is for connection of the 50-ohm antenna cable.
J4 is for connection of the whip antenna cable.
(2) The pressure relief valve releases internal pressure over 4
psia in the coupler.
(3) The chassis ground terminals provide for ground connection
to the mounting rack.
PRACTICE EXERCISES:
Complete the following exercises by circling T for true or F for
false, circling the letter preceding the correct answer, or fling in
the blanks, as appropriate.
Be sure to complete the practice
exercises as they appear.
They are "building blocks" and will help
you complete the rest of the subcourse successfully.
The answers
follow the last exercise and are separated by rows of slashes (////).
If any of your answers are incorrect, study the appropriate part of
the subcourse before you continue.
1.
T
F
The radio set AN/GRC-193 major components are the
receiver-transmitter RT-1209, amplifier-converter AM-
6879, power amplifier AM-6545, and antenna coupler CU-
2064.
2.
T
F
The mount MT-6232 or MT-6233 is not a component of the
radio set AN/GRC-193; each mount MT-6232 or MT-6233 is
a component of the installation kit.
3.
T
F
The handset H-189 or H-250 must be connected to the
top audio connector of the receiver-transmitter.
4.
T
F
The power cable from the vehicle battery is connected
to connector J3 on the power amplifier AM-6545.
11
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