CHAPTER 3 OPERATION
FRONT PANEL
1. MIC GAIN/ANF CONTROL :
This is a multi function switch which
controls both the gain to the microphone as well as the ANF (Advanced
Noise Filter). In the outer position, the switch controls the ANF which
improves the signal to noise ratio when receiving a marginal signal. When
the switch is in the inner position it controls the amount of gain to the
microphone.
2. ON/OFF VOLUME CONTROL :
This knob controls the volume and
power to the radio. To turn radio on, rotate the knob clockwise. Turning the
knob further will increase the volume of the receiver.
3. SQUELCH CONTROL :
This switch is used to eliminate background noise
being heard through the receiver which can be disturbing when no
transmission are being received. To use this feature, turn the switch fully
counterclockwise and then turn clockwise slowly until the background noise
is just eliminated. Further clockwise rotation will increase the threshold level
which a signal must overcome in order to be heard. Only strong signals will
be heard at a maximum clockwise setting.
4. RF GAIN CONTROL :
This control is used to reduce the gain of the RF
amplifier under strong signal conditions.
5. SWR CAL CONTROL :
This SWR CAL control allows the user to
calibrate the SWR meter.
6. S-RF/CAL/SWR SWITCH :
In the S-RF position, the meter will indicate
the strength of the signal being received, as well as the relative RF output of
transmission. When calibrating the SWR meter, you need to put this switch
in the CAL position. To use the meter to measure the standing wave ratio,
turn the switch to the SWR position.
7. MODE CONTROL :
This control allows you to select one of the following
operating modes : PA/ LSB/AM/USB.
8. CLARIFIER CONTROL :
Allows tuning of the receive frequency above
or below the channel frequency by up to 1.5 KHz. Although this control is
intended primarily to tune in SSB signal, it may be used to optimize AM
signals.
9. CHANNEL SELECTOR :
This control is used to select a desired transmit
and receive channel.
10. FRONT PANEL METER :
The front panel meter allows the user to
monitor signal strength, RF output power and SWR level.
11. NB/ANL/OFF SWITCH :
This is a three position switch. Move the switch
all the way up to activate the Noise Blanker (NB) and Automatic Noise
Limiter (ANL). The Noise Blanker is very effective in eliminating repetitive
impulse noise such as ignition interference. When the switch is moved to the
middle position, only the Automatic Noise Limiter (ANL) is engaged. Move
the switch to the bottom position to turn off the ANL and NB.
12. CH19/OFF SWITCH :
The Channel 19 switch is used for instant access to
Channel 19, which is often used by truckers for transmission of traffic and
weather conditions.
13. TONE SWITCH HI/LO :
This switch changes tone quality in receive
only. In LO position, bass is increased and in HI position, treble is increased.
14. DIM/BRT SWITCH :
This switch controls the level of brightness for the
meter lamp and channel displays.
15. TX/RX LED :
The red LED indicates the units is in the transmit mode. The
green LED indicates the unit is in the receive mode.
RF GAIN SWR CAL
ANF
MIC GAIN
NB/ANL
ANL
OFF
OFF
CH19
CAL
LOW
S/RF
SWR
HI
DIM
BRT
TX/RX
CLARIFIER
VOL SQ
OFF
TONE
LSB
PA
USB
AM
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