Using Your Transceiver; Remote Speaker Operation; Technical Specifications - Midland ALAN 100 PLUS B Manual De Instrucciones

USING YOUR TRANSCEIVER

Do not transmit without a suitable antenna or 50 Ohm load connected to the an-
tenna connector.
To receive:
1. Check that the unit is properly connected to a source of 12-13.8 V through
the in-line fuse and red wire.
2. Make sure that the antenna is attached.
3. Connect the mic plug to the mic jack.
4. Select AM or FM mode.
5. Set the emergency switch to the center position.
6. Set the Squelch control to maximum counterclockwise position.
7. Turn on the unit by rotating the ON/OFF/VOL control.
8. Set channel selector to the desired channel.
9. Adjust the volume to a suitable listening level.
10. Adjust Squelch to cut out annoying background noise when no signal is being
received.To do this, set the Channel Selector to a channel where no signals are
present or wait until signals cease on your channel.
Then, rotate the Squelch control in a clockwise direction to the point where the
background noise just stops. Now, when a signal is present, you will hear it, but will
not be disturbed 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, otherwise weak signals will
not be able to open the Squelch circuit. To receive very weak signals, it is best to lea-
ve Squelch set to the minimum position by rotating the control maximum counter-
clockwise. 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 portion 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 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 internal circuit
automatically sets the mic signal for maximum modulation, so speaking loudly will give
no advantage.
8 | Alan 100 Plus B Instruction Guide

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 disconnected. You can now monitor all
incoming signals through your remote speaker.

TECHNICAL SPECIFICATIONS

Receiver
Frequency coverage ............................................................... 26.965 to 27.405 MHz
Sensivity .............................................................better than 1.0 μV for 20 dB SINAD
Adjacent Channel Rejection ............................ 60 dB at 10 kHz; 70 dB for 20 KHz
Intermediate Frequency ......................................1st IF=10.7 MHz; 2nd IF=455 KHz
Audio Output power ................................................................................4.5 watts max
Frequency Response (-6dB) .................................................................450-2500 Hz
Squelch ........................................................................... adjustable from 1.2 μV to 1mV
Trasmitter
Frequency coverage ............................................................... 26.965 to 27.405 MHz
Duty cycle ..............................................................................................................5/5/90
Output Power ..............................................................................................4 watts max
Type of modulation ............................................................................................ AM/FM
Max Deviation ...........................................................................2.5 KHz FM; 80% AM
Spurious Radiation .................................................................................62 dB or better
Frequency Tolerance .................................................................... better than 0.002%
Antenna impedance ......................................................................................... 50 Ohm
Power supply ............................................................................................................13.8V
Current Drain ...............................................................................FM: 1.3 A; AM: 1.8 A
Dimensions .......................................................................................... 124x38x190 mm
Weight ...................................................................................................................... 1.2 kg
Specifications are subject to change without notice.
The disconnect device shall disconnect both poles simultaneously.
Alan 100 Plus B Instruction Guide | 9