PolyPlanar IMR-2 - Manual (Page 6)

MRR-7 Keypad - IMR-2 Interface 11
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Maryland USA (410) 761-4000 - www.polyplanar.com
poly-planar
Waterproof Marine Audio
15) Intercom signal is too loud / too quite
a. Make sure the Mic Volume adjustment has been set on the
rear side of the MRR-7.
16) There is a loud feedback when the Intercom is in use
a. Make sure that the Intercom signal is wired properly to play in
the opposite zone that you are in. (see section 6 of
instructions.)
b. Make sure the Mic Volume adjustment has been set on the
rear side of the MRR-7. Adjust volume lower (counter-
clockwise) to reduce feedback.
c. If Intercom buttons are pressed simultaneously in both zones
then likelihood of feedback is much greater. If adjusting the
gain does not reduce this then avoid pressing both buttons
simultaneously. The intercom is intended for use more similar
to a walkie-talkie than a telephone.
17) There is noticeable hum or excessive noise when intercom is in use
a. Be sure that the cables running to the MRR-7 are not routed
alone with high-current vehicle wiring such as ignition or
battery wires.
b. If there are excessive engine vibrations present in the panel
upon which the Intercom is mounted, this may degrade the
intercom signal. The intercom is designed to reject these
unwanted signals as much as possible. Try adjusting the gain
or isolating the unit from the panel.
WARRANTY
Poly-Planar marine audio systems are warranted to be free of defects in
materials and workmanship for a period of two years. Warranty is subject to
proper installation and operation within published specifications. Poly-Planar
will repair or replace, at its discretion, any unit returned prepaid to its factory
and determined to be defective. Poly-Planar Inc. is not liable for consequential
damages.