POLMAR PL-760, Руководство пользователя

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1 INTRODUCTION
Thank you for purchasing this quality product from Polmar. This transceiver has been de -
signed and manufactured in Japan specifically for Ultralights, Gliders and General Aviation
Aircraft and Helicopters with size and power consumption as the main considerations. Ease
of operation was another primary achievement.
Please follow this manual closely to ensure optimum performance, we do hope you have
many hours of trouble free communication and safe flying.
2 INSTALLATION
This manual contains all of the necessary instructions for installation and operation. After
installation please keep this manual in a safe place for future reference.
3 INSTALLATION CONSIDERATION
As with all aircraft radios, successful communications start with the installation.
After unpacking the transceiver verify all parts against the parts list. Select a suitable
mounting area within a maximum 30 degree viewing angle and select a suitable location
for operation of ancillary controls, backlight, intercom etc. The use of aviation quality
shielded cable is recommended at all times. Avoid running or wrapping other wires around
the antenna lead and keep lengths as short as reasonably possible. Ensure that the radio is
not exposed to direct rain or moisture (we do not accept liability for water damage).
Make sure the transceiver is connected to a 11.7-16.8 volt or 23-33 volt battery system.
Do not use AC volts from a Rotax lighting coil.
4 GENERAL
The following section is a guide for individual types of aircraft installations.
4.1 Sailplanes
Due to the inherent space restriction on most glider instrument panels the PL-760’s 57-
mm front panel makes it an excellent choice for confined spaces. Generally the radio is
mounted at the bottom of the panel with essential instruments at the top. Location of the
ancillary switches should be convenient to the pilot.
The Press to Talk (PTT) can be a normally open push-button located on the control column
or a handheld microphone. Speakers are normally located at the rear of the pilot’s head.
If not using a handheld microphone, then a boom mike with an electret microphone is pre -
ferred. If this radio is to be installed in a motor glider then ensure that the ignition leads
are shielded. This will reduce ignition noise considerably. The PL-760 has noise limiting
circuitry incorporated and works well in most cases but two stroke interference can be
difficult to suppress.
4.2 Ultralight
Most ultralights like sailplanes suffer from space restriction. Locate the transceiver with
a good viewing angle. Ensure that it is protected from rain (No liability is accepted for
water damage). Use shielded aviation quality wire for the headphones, microphone, and
speaker. As nearly all Ultralights use two-stroke engines ignition noise can be a problem.
Again ensure that all engine high voltage cabling is shielded and grounded. There is almost
certainly some background ignition noise with these engines, however, the PL-760 noise
limiter will eliminate nearly all of the noise (except for levels around 5 uV).
In tandem or side by side seating, use of the intercom provided will work well providing
you switch it on. The intercom uses the side-tone feature of the radio and therefore may
pick-up some ambient noise. Another feature is the fitting of the external memory toggle
switch which when fitted (normally on the control column) allows the pilot to scroll through
the memory channels and select scan without reaching for the main channel controls on
the radio. This is particularly useful for the rear pilot or instructor in tandem Ultralights or
for Helicopter/Gyroplane pilots.