Ranger RCI-6300F25/150 - Manual (Page 3)

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Installation (Continued)
4. Mount the microphone bracket near the radio in an easily accessible
spot using the two screws provided.
Ignition Noise Interference
With weak signals, you may experience interference of the signal by
background noise. This radio has NB and ANL controls which will help
reduce background noise from sources such as your ignition system.
However, background electrical noise may come from several sources
and all noise may not be eliminated. With extremely weak signals, you
can operate this radio with the engine turned off, which should improve
reception. If the ignition noise level is too high to allow proper operation
under most conditions, you should have your installation of the radio
checked by a qualified technician.
Antenna
This radio has a jack in the rear for a standard PL-259 antenna plug. If
you are looking for the most range for your transmission, use a vertically
polarized, quarter-wave length antenna. If antenna height is a problem,
you may use a shorter, loaded-type whip antenna although you can
expect some lost of transmission range.
To improve performance, your antenna should be matched to your radio.
Your antenna can be adjusted so that it matches your radio.
External Speaker
The external speaker jack (EXT. SPK) on the rear panel is used for remote
receiver monitoring. The external speaker should have 8 ohms impedance
and be able to handle at least 4watts. When the external speaker is
plugged in, the internal speaker is disconnected.
Public Address
To use the Public Address (PA) function, first connect an external speaker
to the PA. SP. Jack on the rear of the radio. See the above specifications
for a proper external speaker. Keep the speaker away from the
microphone to avoid acoustic feedback.
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Chapter 3 Operation
Controls and Indicators
Front Panel
1. SQUELCH CONTROL: This control is used to control or eliminate
receiver background noise in the absence of an incoming signal. For
maximum receiver sensitivity, it is necessary that the control be
adjusted only to the point where the receiver background noise is
eliminated. Turn fully counterclockwise and then slowly clockwise
until the receiver noise just disappears. Any signal to be received
must now be slightly stronger than the average received noise.
Further clockwise rotation will increase the threshold level that a
signal must overcome in order to be heard. Only strong signals will
be heard at a maximum clockwise squelch setting.
2. ON/OFF VOLUME CONTROL: Turn clockwise to apply power to the
radio and to set the desired listening level.
3. RF GAIN CONTROL: This control is used to reduce the gain of the RF
amplifier under strong signal conditions.
4. MIC GAIN CONTROL: Adjust the microphone gain in the transmit
mode. This control is used to set the audio level of the microphone for
maximum performance and clarity.
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Ranger