BendixKing KLX 135A - Pilots Guide - Manual (Page 133)

5.2. RECEIVE/TRANSMIT ANNUNCIATION
The KLX 135A display tells you when it is receiving and transmitting!
When you key the mic and the KLX 135A COMM transmits, a small
“T” is displayed above the active frequency (figure 5-9).
One instance where this is nice is if you have multiple
COMM transmitters in the aircraft, it tells you when you
are transmitting on the KLX 135A. Whenever the KLX
135A’s receiver breaks the squelch, an “R” is displayed
in the same spot (figure 5-10). If the volume happens
to be turned down low on the KLX 135A, your audio
panel, or your headphones, you may not hear the
audio, but you will see the “R” annunciation. Note that
you can’t receive and transmit at the same time.
5.3. VOLUME ADJUSTMENT AND AUTOMATIC SQUELCH
OVERRIDE
The small knob in the upper left corner of the KLX 135A is not only
the ON/OFF switch, it is used to adjust the COMM audio volume. By
pulling this knob out you can override the automatic squelch, either to
receive a distant, weak signal or to give you a noise reference to
adjust the volume by.
5.4. STUCK MICROPHONE PROTECTION
Occasionally, a microphone switch can get stuck in the “on” position.
When this happens, you can jam the frequency. To prevent this, the
KLX 135A automatically shuts down the transmitter whenever it is
keyed for more than 35 seconds at a time. When this
happens, the COMM frequency display area is
replaced with a flashing Stuck Mic message
(figure 5-11) until the microphone key is turned off.
When this is the case, tuning the COMM with the left knobs or press-
ing the flip-flop button will cause the words Stuck Mic to be removed,
allowing you to see what you are tuning. This is helpful if you desire
to listen to a different frequency than you were when the microphone
got stuck. Five seconds after you stop adjusting the frequency in any
way, the Stuck Mic message will reappear.
If you are intentionally making a lengthy transmission and Stuck Mic
is displayed, simply release the microphone key for an instant and
then resume your transmission.
COMM Operation
5-4 Effective Date 5/95 006-08789-0000 Rev 0
COMM Operation
Chapter 5
119ß00
121.60
>Leg
Figure 5-9
119®00
121.60
>Leg
Figure 5-10
Stuck
Mic
>Leg
Figure 5-11