1:Alc - RM Italy BLA600 User Manual

Menu List

1:ALC

2:Temp
3:Brightness
4:Contrast
5:CW QSK
6:STB Parameters
7:OP Parameters
8:Default
9:Esc
1: ALC
The BLA600 has the optional ALC output for connection to the transceiver that can
be utilised as an additional level of protection. It should not however be used as a
primary means of adjusting the transceiver drive power. (Doing so can create
splatter and increase Intermodulation Distortion). ALC action will also depend on
the transceiver and in many cases the ALC circuit is slow reacting and will allow
many cycles of RF to pass before the ALC circuit acts to reduce the output power of
the transceiver. The ALC output is adjustable using the ALC menu and has a 0 to –
10V range, that is suitable for all modern transceivers. If using the ALC menu make
sure that the BLA600 ALC Output on the rear panel ^ is connected to the radios
ALC input. See your radios instruction manual for further details.
Adjusting the ALC level is a one time operation and when the adjustment is made
the amplifier is in Bypass and is not amplifying the signal. However to reduce
unnecessary interference we recommend that this be carried out with the output
connected to a dummy load.
Select menu '1: ALC Setup' with the 'Navigate' key a, press the 'Enter' key ^ to
access the menu.
The BLA600 has two adjustments for the ALC . Max Power and No Power. The
Transceiver drive power should first be adjusted manually as explained in section 7
'Operation'. It is important to make this adjustment before setting the ALC. Select
the band that requires the most input drive from the transceiver either 160 or 6m.
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