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IMPORTANT NOTE - There are two typical uses of the RTR-2 MAIN ANT OUT:
1. When using the RTR-2 to send the transmit antenna received signal to a second receiver only
while the RADIO is listening to the RX ANT.
2. When using the RTR-2 MAIN ANT OUT to send the transmit antenna received signal to an
external splitter in order to share it between a second receiver or SDR spectrum display and
the RX ANT IN.
As shown on Figure B, the MAIN ANT OUT has no internal connection to option slots.
See the section System Connection Diagrams for details
Warning: When RX ANT IN is used in this manner, DO NOT short the
“BIAS TEE ENABLE” jumper on RTR-2 PBC.
See section entitled Internal Jumpers.
The RTR-2 immediately reverts to MAIN ANT transmit mode, Figure A, RADIO to MAIN ANT
IN as soon as:
The transceiver is keyed to transmit, with a ground on transmit on the keying line center
conductor
The keying line is removed from the RADIO PTT-RX ENABLE connector
The POWER is turned Off
The MAIN ANT transmit mode cannot occur when the Exception* condition exists.
*Exception: The RTR-2 failsafe, which requires the installation of a keying cable, can be disabled
with the Force Ground internal jumper. Force Ground is provided for RTR-2
applications when ONLY receive antennas are used, such as SWL or AM DX operations.
MAIN ANT IN may also be used for a receive antenna, if RADIO connection to a
transceiver RF output is NEVER to be made.
The Force Ground internal jumper disables the failsafe provided by requirement of the keying cable
connection to RADIO PTT-RX ENABLE. See the Internal Jumpers section.
WARNING: When the Force Ground jumper is used to disable RTR-2 failsafe, and when unit is in
RX ANT mode, any RF transmitted into the RADIO connector will cause internal
damage, especially to optional Plug-In Modules, and may damage externally connected
receive equipment.
Damage caused by misuse of the “Force Ground” jumper is not covered under warranty.
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