User manual
8
Antenna connection
Connect Your CB antenna to the ANT socket on the rear side of Your ALBRECHT
AE 5090 XL. Most CB antennas must be tuned to best radiation during installation to
give highest effective communication range. CB specialists do that job with a
standing wave meter to check and adjust the aerial. Tune the aerial to the best
standing wave ratio (SWR) on an intermediate channel e.g. using Channel 1 (26.965
MHz) in 80ch mode or Channel 20 (27,205MHz) in all other modes.
On this channel You should obtain an SWR of approx. 1.5 or less. If the SWR
deteriorates on the highest (Channel 40) and lowest (Channel 41) channels up to a
value of 2.5, then your aerial is still acceptable. SWR above 3 is too bad for good
communication range. A bad SWR may also indicate that there is perhaps an
installation error or missing ground. Problems may be caused through missing
ground, especially in boats and motor homes with fiberglass body. For these cases,
Albrecht offers a special connecting cable with matching box as “artificial ground”
(like AKM 27, order nr. 68440) or use special antennas for groundless installation like
GL 27 (order nr. 6351).
Some antennas, like “Gamma II” are broad banded and do not need any
retuning during installations.
Even if Your AE 5090 XL has a particularly robust transmitter high-
level amplifier stage which can even withstand mismatching of
SWR=3, you should still never transmit without an antenna!
Operation
Before switching on
• Turn SQUELCH and ASC control left (counter clockwise) as far as possible
Switching on and adjusting volume
The on/off switch is combined in the VOLUME control. To switch on:
•
Turn VOLUME control (the inner knob) from OFF position slightly clockwise.
LC display and buttons are illuminated. Then turn further until desired volume is
reached.
Display and backlight settings
You can chose between two display- and backlight colours red and blue and two dim
levels for the display and the backlight.
• Press
DIM/Light button longer than c. 1,5s to change the colour
•
Press
DIM/Light
button less than c. 1,5s to change the dim level
Selecting the operating channel
On the radio set:
• With the rotary channel knob You can continuously select channels. The present
channel is displayed.
On the microphone:
• Press the ∧ or ∨ button on the microphone briefly, to switch up or down a channel.