2 OPERATION
12
ALPIN100 Manual © Copyright 2008 by Reimesch Kommunikationssysteme GmbH
2.5.
ELECTRONIC BIAS SYSTEM (EBS) only ALPIN 100 MK II
The amplifier has an integrated EBS which can be activated and deactivated after switching
on. The buttons UP and DOWN have to be pressed down while pressing the LINE switch on
the backside.
After this the display will show the message “EBS is on” or “EBS is off”. The status can be
changed by doing this procedure again. The default configuration is an activated EBS.
2.6.
TUNING PROCEDURE
Below, you can find a step-by-step description of the tuning procedure. It may vary from one
band to another, but these are the basic things to do. For a better and faster tuning use the tune
table in the following section to find a rough starting point.
1)
Set the Amplifier to the desired band with the
BAND SWITCH
on the left of the front
panel.
Never change the position of the
BAND SWITCH
while transmitting!
2)
Apply approximately 20W of drive power to the amplifier.
3)
Tune the
LOAD KNOB
on the front panel while observing the
CAP tune meter
on the
LCD
display. Turn the knob into the direction of the arrows of the
CAP tune meter
.
Please use the tune table in the next chapter for the first configuration of
TUNE
and
LOAD KNOBs
.
4)
Now we have to turn the
TUNE KNOB
on the front panel to the maximum reading of
the
FORWARD POWER
in the display. While tuning it is possible that the built- in
INPUT ATTENUATOR
is activated and the
ATT LED
will light. Don’t care about that
and try to find the optimum position for
LOAD
and
TUNE
. After releasing the
PTT
and pressing it again the
INPUT ATTENUATOR
will be deactivated again (when
tuning is good) and in the next step some fine tuning can be done.
5)
After readjusting the transceiver output power a slight retune could be necessary and
steps 4) and 5) have to be repeated.
!!! ATTENTION !!!
Before tuning decrease the drive power to approximately 20W
to avoid damages! After you have found the correct tuning,
you may increase the drive power.
