micro
HAM ©
2016
All rights reserved
PA & Sequencer tab
The power amplifier in use is capable of automatic control using Icom CI-V data, has an output that provides
confirmation that it is ready for RF and operates with a T/R delay of 10ms unless the frequency has changed and
it must retune.
To support this amplifier, the
KEYIN
box has been checked, the PA port CI-V function has been set to generate
TX frequency
at
9600 baud
, simulating Icom radio with
6A
CI-V address.
The
INH
ibit signal is set for a
30ms
delay to provide a small margin of safety and prevent the transceiver from
generating any RF during the
SWITCHING DELAY
of the antenna switch which uses relays specified for
26ms
switching times.
Output A10 controls preamplifier power for the receive 4SQ. It is set to
0ms LEAD
time in order to disable the
preamplifier any delay. The
TAIL
delay has been set to a safe
20ms
to guarantee that RF power has been
removed from the feedline before the preamplifier is turned on.
In order to use power sourced from A10 directly and to insure that the preamplifier will be OFF when not
operating on 160, 80 or 40m, the
INVERTED
box is checked for A10.
57