FEATURES AND CONTROLS
POWER ON/OFF SWITCH
The switch simply turns your H407 on and off.
VOLUME CONTROL
This control adjusts the receiver volume. The control should be turned clockwise
to increase the volume,
SQUELCH CONTROL
The Squelch Control Is used to eliminate background noise when there are no signals
present strong enough to overcome the noise. To adjust the Squelch Control, select a
channel where there is no signal. Turn the volume up to normal listening levels. Rotate
the squelch control clockwise until the background noise disappears.
CHANNEL SELECTOR
The channel selector switch is used to select the channel frequency. It automatically
adjusts both the transmitter and receiver frequencies, and displays your selection in
bold L.E.D. (Light Emitting Diodes) numerals.
MIC GAIN CONTROL
This control allows you to adjust microphone sensitivity or power to compensate for
different operating situations. Maximum microphone sensitivity or power is obtained at
the full clockwise position and the control should be set to this point for normal operation
and maximum range. Examples of how this control can help to maximize communications
effectiveness are as follows: When you are operating at extremely close proximity
(within 100 yards or meters) of the other station, reducing the microphone gain may
help to eliminate overload and distortion at the other station. When you are operating in
an extremely noisy environment such as may be found In the cab of certain (ergo trucks,
open sports cars, or around noisy machinery, in order to avoid or reduce the amount of
noise that goes out with your signal, you can reduce the microphone gain and by
speaking more closely and loudly into the microphone, reduce the ratio of noise to voice.
RF GAIN CONTROL
This control allows you to adjust the basic sensitivity of the receiver section of the
transceiver. It is somewhat like the microphone gain control in that it allows you to
compensate for different or varying operation conditions. Maximum RF Gain or receiver
sensitivity is obtained at the maximum clockwise position of this control, and the control
should be set to this point for normal operating and maximum range. For example,
when operating at close proximity to other strong signals, it may be helpful to reduce
the RF Gain to avoid overload or distortion or interference from adjacent channels.
PA-CB SWITCH
When the PA/CB switch is placed in the PA position, it converts your H407 into a
powerful Public Address System. The "PA" function requires an optional 8-16 ohm
paging speaker. This speaker must be connected to the "PA" jack on the back of the set.
Once this speaker has been connected, simply put the PA switch in the "PA" position
and depress the microphone Push-To-Talk switch to activate the set.
S/RF METER
The H407 is equipped with a combination S-RF Meter. In the receive position,
the meter reads the level of the incoming signals. In the transmit position, the meter
indicates relative power output.
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