6
Four Square Control Console Rear Panel
Figure 2
12 VDC
A standard 2.1 mm plug connection for 12 Vdc. The current draw ranges from 30
mA to 700mA depending on the direction selected. If station power is used, it must
be 12 Vdc at 1 amp (fused) minimum. An optional 12 Vdc at 1 amp wall
transformer supply
DXE-PSW-12D1A
is available.
Outer connection
is
GROUND
Center Pin
is input for
+12 Vdc
.
A 2.1 mm power cord is supplied with unit. The wire with the white stripes is the +12 Vdc.
AMP
RCA type connector. If you are using a linear amplifier, the keying line should be routed through
the Four Square Control Console. This jack connects to your amplifier's keying or relay line input.
The keying signal has essentially no delay on pass through. If you switch antenna positions while
transmitting, the controller waits until you stop transmitting before switching antennas. Once the
controller starts to switch antenna relays, amplifier keying signals are inhibited until switching is
fully completed.
The controller always waits 30 ms before restoring amplifier control signals after any antenna relay
transfer.
The AMP circuit is capable of switching up to 75 volts open circuit (receiving) and can safely sink
500 mA maximum current when pulled to ground (transmit). This will handle most modern
amplifiers. It will not handle high voltage relays, AC relays, or negative voltage keying systems. If
you have such systems you probably already have a relay line buffer. Simply install that buffer
between the amplifier and this jack.
