INITIAL PRESETS. Your initial presets for the radio set will be described in the following subparagraphs.
a. Check to make sure that you have made all cable connections that are required as described in Lesson
b. Make the following settings on the amplifier/coupler and receiver/exciter:
Set the MODE switch to V-TR.
Set the ANT SEL switch to the middle BNC connector position.
Set the SB switch to either USB or LSB, whichever is required.
Set the FREQUENCY KHZ push buttons to the desired operating frequency.
c. Make the following settings on the amplifier-power supply (AM-7152):
Set the SPEAKER ON/OFF switch to ON if the speaker is to be used. If just the handset is to be
used or if nothing is attached to the lower AUDIO SPEAKER connector, then the switch should
be in the OFF position.
Turn the SQUELCH OFF/MAX control fully counterclockwise, and then adjust it clockwise until
the squelch quiets the background noise. (The adjustment can't be done until power is applied.)
d. Set the ANTENNA LOADING switch to the appropriate position as dictated by the operating
frequency and antenna selected for use as follows:
Whip or NVIS antenna. For a frequency of 2 to 10 MHz, set the switch to the 2-10 position. For
a frequency of 10 to 29.9999 MHz, set the switch to the 10 to 29,999.9 position.
Slant wire or dipole antenna. For any frequency when using one of these two antennas, set the
switch to the DIPOLE position.
31. POWER. When you have made all the preceding settings on the radio set, you are ready to apply power to
the radio set. You should perform the following:
Set the POWER ON/OFF switch on the amplifier-power supply to ON. The power indicator light
should come on.
Set the VOLUME OFF/MAX control on the receiver/exciter to a comfortable listening level.
32. OPERATION OF RADIO SET AN/GRC-213. Now that you have learned the initial presets and how to
start up the radio, you are ready to operate it.
a. To operate the radio set for normal two-way voice communications, you should do the following: