Page
258
RF GAlN
Clockwise rotation increases the receiver sensitivity. This
control is usually positioned fully clockwise. Turn the
control counterclockwise to reduce sensitivity when
exceptionally strong signals are being received, or to reduce
adjacent channel interference.
y
TEE
NB
.
VOX
GAlN
S-METER
Figure
53
Adjusts the input level at which the voice-controlled relay
circuits will operate. At
this
level, either microphoneor
CW
METER WITCH
input will silence the receiver circuitsand place the transmit
circuits in operation.
The meter face
is
shown in Figure
3-3.
The meter gives the
following indications with the designated switch button
The
VOX
button
must
be depressed to activate the depressed.
voicecontrol circuits.
VOX
DELAY
13.8:
Power supply voltage (upper scale).
ALC:
1.
Receiving, meter gives an S-meter indication
Controls the length of time the voicecontrol circuits will
on the lower scale from
0
to S-9
+
60
dB.
hold the Transceiver in the transmit mode after the input
2.
Transmitting, Al C action should
--
not exceed
has ceased.
6
on the upper scale.
AGC
Selects fast or slow decay time for the automatic gain
control, or turns the AGC circuits off.
BAND
Selects the desired amateur band, or station WWV (National
Bureau of Standards) at
15
MHz.
The frequency printed on
the panel
is
the low frequency end of each range, which
extends
500
kHz
upward in frequency. The WWV band
is
for receiving only.
MIC
Connect a high-impedance microphone, preferably with a
PTT
(push-totalk) witch. The microphone cable Gonnector
is furnished.
PHONES
Connect low impedance headphones through a phones plug.
When the plug is inserted in this jack, the loudspeaker is
automatically disconnected.
MlClCW LEVEL
When the USE or LSB buttons an, depresred, this control
adjusts the audio drive. When the CW or TUNE buttons are
depressed, this control adjusts the carrier
level.
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PWR: lnd~cates relat~ve power output on the upper
scale.
VOX
When this button is released, the
PTT
microphone switch
must be pushed to transmit.
When this button
is
depressed, the voice-control circuits are
activated. The position of the USB, LSB, and CW buttons
will determine whether the microphone or the key will cause
transmission to occur.
When this button is depressed, the right-hand digit of the
frequency display is turned off.
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If the accessory noise blanker has been installed,
it
is
activated when you depress this button.
USB, LSB, CW
Depress the appropriate bunon for upper sideband, lowel
sideband, or
CW
transmission.
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