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(19) – RADIO2
Multi-pin jack for RADIO2 interconnection.
Connector: DB37 female
Detailed description is in Appendix A.
(20) – PTT IN 2
Status input for sensing the state of RADIO2. Connect to the PTT output of RADIO2.
Connector: RCA
TIP – Signal
NOTE: This connection is required to support VOX operation and PTT by software (CAT).
(21) – FS2
Foot switch 2 input (configurable function, by default keys RADIO2).
Connector: RCA, active when grounded.
TIP – Signal
(22) – PAPTT2
PTT output for Power Amplifier for RADIO2. Output (Solid State or
RElay contact) depends on RE/SS jumper position.
Connector: RCA, when active goes to ground.
TIP – Signal
If the jumper is in the SS position, the switching transistor (open
collector) is connected to the PAPTT2 jack. The transistor can
switch up to 45V/0.8A. This position is appropriate for modern
amplifiers with electronic keying. Check the manual of your
amplifier to be sure the PTT requirements do not exceed the
transistor rating. If the requirements exceed transistor rating set the
jumper to the RE position - this position connects the relay contact
to the output jack. Maximum rating for the relay is: 48V AC/DC 1A.
TIP: All of the RE/SS jumpers are located on the bottom circuit board just in
front of the DC 12V input jack.
TIP: If you are not sure about the keying voltage of your amp or LNA, use
the RE position.
(23) – LNA2
Sequenced keying (bypass) for Low Noise Amplifier or receive antenna control on RADIO2.
Output (Solid State or RElay contact) depends on RE/SS jumper position.
Connector: RCA, when active goes to ground.
TIP – Signal
The output circuit is the same as shown for PAPTT2.
(24) – PTTIN1
Status input for sensing the state of RADIO1. Connect to the PTT output of RADIO1.
Connector: RCA
TIP – Signal
(25) – FS1
Footswitch 1 input (configurable function, by default keys RADIO1).
Connector: RCA, active when grounded.
TIP – Signal
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SHELL – Ground
SHELL – Ground
SHELL – Ground
SHELL – Ground
SHELL – Ground
SHELL – Ground
13
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