④RS232 serial interface
It is used for connecting peripheral smart devices, such as external VFO knob.
⑤Electric key interface
This interface is a 3.5mm three-core interface, used to connect electronic automatic key control or ordinary hand keys.
⑥Network interface
Used for remote control and remote firmware upgrade.
⑦GPS antenna port
Connect an active GPS antenna.
⑧PTT control output.
PTT transceiver used to control the power amplifier.
⑨Audio output.
Demodulated audio output
⑩Host USB interface
The function of this interface is temporarily reserved and used with caution for charging external devices.
⑪Grounding post
Note: To achieve the best performance and ensure safety, you can use a short and thick copper stranded wire to connect this ground terminal to the ground
well.