UP/DN-Buttons on the microphone
To skip to the next channel press the UP-button. If you keep pressing this button the “auto-repeat” function
is obtained.
To skip to the last channel, press the DN-button. If you keep this button the “auto-repeat” function is
obtained.
Note!
If the channel will not change make sure that the “EMG” or “LOCK” button has not been pressed. In this
case, press the “EMG” or “LOCK” button to deactivate this function.
As far as other functions are concerned refer to previous instructions.
Memory Buttons M1 - M3
These buttons allow the storing and recalling of 3 preselected channels. How to store:
•
select the desired channel and press M1 for at least 3 sec to store the choosen channel in the M1
memory.
•
Repeat these steps to memorise on M2 till M3 the other preset.
Note
As soon as the ALAN 255 ESP from the current supply is separated becomes the stored channels auto-
matically deleted. It must take place then a reprogramming.
AM/FM Selector
Set the „FM“ position (pressed). FM will be indicated on the Display.
The transceiver operates in frequency modulation mode.
Set the „AM“ position (releaded).
The transceiver operates in amplitude modulation mode.
TO RECEIVE
Turn on the power by rotating VOLUME clockwise. Set Squelch control to maximum counterclockwise
position. Set channel selector to the desired channel. Adjust Squelch to cut out annoying background
noise when no signal is received.
TO TRANSMIT
Press the push to talk button on the microphone and hold it at an angle of about 5-7,5 cm to your mouth
and speak in a normal voice. To receive again release the push to talk button.
Be sure the mic plug is firmly connected to the jack, for if the connector becomes loose, you may end with
squeal, feedback and other problems.
SCAN button
With this control, you can automatically seek for a busy channel.
•
Turn the Squelch clockwise until the background noise is no longer heard.
•
Press the ‘’SCAN’’ button: the transceiver will scan automatically all the channels until a carrier is being
received.
•
When it finds a carrier it stops and starts again some seconds after the ending of the communication
on the channel.
When the radio is transmitting, the scan function is deactivated.
SPECIFICATIONS
GENERAL
Channels ........................................................................................................................... 80 AM; 12FM
Frequency Range .................................................................................................26.565 to 27.405 MHz
Frequency Control .............................................................................................................................PLL
Operating Temperature Range ....................................................................................... -10
°
bis +55
°
C
DC input voltage ............................................................................................................ 13.8V DC
±
15%
Size .............................................................................................................. 154 (L)x 173(H)x 50(P)mm
Weight ..............................................................................................................................................1 Kg
RECEIVER
Receiving system .............................................................................. Dual conversion superheterodyne
Intermediate frequency ................................................................................................. I
°
IF:10.695 MHz
.......................................................................................................................................... II
°
IF:455 KHz
Sensitivity ...................................................................................... 0.5mV for 10 dB SINAD in FM mode
...................................................................................................... 0.5mV for 10 dB SINAD in AM mode
Audio output power @10% THD .................................................................................. 2.O W @ 8 Ohm
Audio distortion ................................................................................................... Less than 8% @ 1KHz
Image rejection ...............................................................................................................................65dB
Adjacent channel rejection .............................................................................................................. 65dB
Signal/Noise ratio ............................................................................................................................45dB
Current drain at stand/by .............................................................................................................. 250mA
TRANSMITTER
Output power ............................................................................................. 4W FM 1W AM @ 13.8V DC
Modulation ........................................................................................................... AM: from 85% to 95%
.............................................................................................................................. FM:1,8KHz
±
0,2KHz
Frequency response ............................................................................................ from 400Hz to 2.5KHz
Output impedance ............................................................................................. RF 50 Ohm unbalanced
Signal/Noise Ratio ................................................................................................................. 40 dB MIN
Current drain ..............................................................................................................................1100mA
....................................................................................................... (Power position with no modulation)
All specifications are subject to change without notice.
Approval:
The ALAN 255 ESP D80 possesses an approval from the „Bundesamtes für Zulassungen in der
Telekommunikation“. In Germany this model is liable for registration and charges.
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