For assistance in selecting the right type of aerial, contact your lo-
cal Alan Professional dealer. The aerial must be able to irradiate at
least the rated power of the unit. After installation and calibration, the
standing wave ratio (SWR) value of the aerial should be equivalent
to the lowest possible value or to a value below 1:1.5. The SWR ratio
must be measured with a suitable instrument, with the aerial installed
initsnallocationandsufcientfreespace.
4.3 Connections
I An improper connection or the connection of the unit to non
certied devices may seriously damage the radio and cause
injuries/damage to people and property. For more detailed
information, refer to the Maintenance Manual and contact
the Technical Support of CTE International.
4.3.a Aerial
Verifytheefciencyoftheexternalaerial,thenconnectittothejack
labelled Aerial [10] on the radio using a suitable connector.
4.3.b Power supply
Connect the red/black power cable [12] to a 13.8 Vdc (+/- 10%) pow
-
er supply. Verify that the red terminal is connected to the positive wire
and the black one to the earth. It is essential to verify that the supply
line is able to tolerate a minimum continuous current of 10 A.
4.3.c Connecting/disconnecting the microphone
To connect the microphone, insert the jack labelled RK into the sock
-
et labelled [4] Microphone on the front side of the radio. To discon
-
nect the microphone press the RJ jack release button and delicately
remove the microphone.
4.3.d External speaker (optional)
The optional external speaker (if available) must be connected to
the adjustable 3.5 mm jack of the external speaker output cable
[11]situated on the rear of the radio, following the instructions pro
-
videdwiththespeaker.Theexternalspeakermusthavearatingof8
Ohm and be able to tolerate a minimum power of 12 W.
I The output of the external speaker is raised as compared
to the earth. Be careful not to create short circuits with the
vehicle bodywork.
2 Thetransceivercanbeprogrammedsothattheinternalspeaker
is disabled andit is possible to use the external one only. For
moredetailedinformation,seeparagraph7.2.c.
