headphones increases. The squelch circuit senses the signal level
and turns off the audio as the noise increases. More squelch
means this trigger point occurs earlier; less squelch means it
occurs later (or not at all, with no squelch). Apparent range is also
affected. More squelch reduces the apparent range; less squelch
increases the apparent range.
PPA R37-8 LED Flash Codes
LIGHT CODE
INDICATES
REMEDY
On-Off-On-Off
(continuous)
Low Batteries
Replace or recharge
batteries
Fade-on, Fade-off
(continuous)*
No transmitter on
current channel*
After 6 min, Sleep/
power save mode starts
(extends battery life)*
On Steady
Unit is operating
normally
n/a
*The R37-8 returns to normal operation automatically when a
transmitter is re-established on the same channel.
