CAS-4A/4B Transponder ON2017年10月19日 13時54分

                             Up       Down                                     4k8GMSK  CW       CallSign
CAS-4A (ZHUHAI-1 01)  42761  435.220  145.870  SSB 20_kHz bandwidth, inverted, 145.835  145.855  BJ1SK
CAS-4B (ZHUHAI-1 02)  42759  435.280  145.925  SSB 20_kHz bandwidth, inverted, 145.890  145.910  BJ1SL

PTT COM port2017年10月19日 21時06分

Subject: PTT COM port
From: Mineo Wakita
To: Andy UZ7HO
Date: Thu, 19 Oct 2017 19:34:48 +0900

I can now do transmission operation when I check "Dual PTT"
ie, "SoundModem - Settings - Devices - PTT port - Dual PTT".

When do you check "Swap COM pins for PTT" ?

Re: PTT COM port
From: Andy UZ7HO
To: Mineo Wakita
Date: Thu, 19 Oct 2017 14:11:28 +0300

Hi Mineo!

Normally for the port A the RTS pin is used, for port B is DTR pin.
The "Swap COM pins" option swaps these pins.

注  RTS: Request To Send, 送信要求
    DTR: Data Terminal Ready, データ端末レディ