
User's Manual | ACOM 2S1 | Automatic XCVR Commutator
Page 20 of 32 | S e c t i o n INITIAL CHECK AND OPERATION
June 2022
3)
Test transmission
Try a short transmission from transceiver
A
- its LED must light during transmission. Hold transceiver
A
to
transmit and try simultaneous transmission from transceiver
B
: it must be disabled and LED
B
must rest
dark. The transceiver
B
must not be able to break transceiver
A
until you release
A
. When neither
A
nor
B
transmits both transceivers must normally receive.
NOTICE
LEDs
A
and
B
should never light simultaneously. Look for any connection error if you
note such condition (see Section
).
4)
Second test transmission
Try the same as described in Point 3 (above) but with
B
and
A
exchanged.
5)
Repeat instructions in Points 3 and 4 (above) at a low (5-10 Watts) output level
Try QSK CW from both transceivers: a first pressed KEY must "reject" CW dots and dashes of the second
one. The second transceiver must be automatically enabled when the first one returns to RX. Both
transceivers must be able to receive in the pauses of transmission.
6)
Breaking the
KEY IN
/
KEY OUT
"daisy chain" wiring
Breaking the
KEY IN
/
KEY OUT
"daisy chain" wiring at any point must disable transmission of both
transceivers.
7)
Breaking the
KEY IN
/
KEY OUT
"daisy chain" wiring
Restore all connections and turn ON the amplifier (if any). Try instructions in Point 5 again. The amplifier
must follow the frequency last transmitted by either transceiver. Increase the output to its nominal level -
no problems should be met.