MIDLAND Alan 199-A - Manual (Page 24)

Alan 199 Instruction Guide | 9
just stops. Now, when a signal is present, you will hear it, but will not be di-
sturbed by noise on the channel between signals. When properly set, the
Squelch keeps the receiver “dead” until a signal comes in on that channel.
However, do not set the Squelch too high, or weak signals will not be able
to open the Squelch circuit. To receive very weak signals, it is best to leave
Squelch set to the minimum position by rotating the control maximum
counterclockwise. The Squelch circuit in your transceiver is an advanced
design. It uses an operational amp IC to accomplish a hysteresis action.
The result is that when you set the Squelch for a precise signal level, if
that signal level increases or decreases in strength, the Squelch circuit will
follow this change. With conventional Squelch circuit, often a signal which
changes strength get “chopped” by the Squelch circuit and you lose a por-
tion of the message. With a hysteresis Squelch, you get it all.
To Transmit:
1. Select the desired channel.
2. Press the push-to talk button on the microphone and hold it an an-
gle about 5-7 cm from your mouth and speak in a normal voice.
3. To receive, release the push-to-talk button. Be sure the mic plug is
firmly connected to the jack.
NOTE: shouting into the mic will not increase your power or signal. An in-
ternal circuit automatically sets the mic signal for maximum modulation,
so speak loudly will give no advantage.
PRIORITY CHANNELS (CH 9-19)
Alan 199 comes with an emergency selector that permits the immediate
activation of channels 9 or 19. The former (CH9) is used for emergency
communications only, while with the latter (CH19) you can ask for traffic
information, etc.
By moving this knob to the central position, the last channel selected will
be activated.
REMOTE SPEAKER OPERATION
A 4 Ohm speaker, rated at 3-10 watts, should be used for this function.
Plug the speaker into the EXT SPKR jack at the rear of the Transceiver.
When the external speaker is plugged in, the internal speaker is discon-
nected. You can now monitor all incoming signals through your remote
speaker.