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Full Duplex Type
Character
SSTV signal is mainly used with over 1,100Hz. However, ST-12 is the adapter which can mix voice signal to SSTV signal with under 1,100Hz, and
simultaneously send both kinds of signals by connecting between your using SSTV connecter and transceiver.
You can increase efficiency of QSO with this adapter, since you can simultaneously explain about Video Dates while
you are sending them. Even though other stations don't have ST-12, they can hear your voice and you can make a bread on sending Video Data.
You can avoid low-frequency jam, because SSTV RX Output Power of ST-12 constantly goes through HPF ( High Pass Filter ).
Especially when you use a simple converter for JVFAX or GSHPC or else, you can increase the Video Data Quality which you receive.
Also, you can use ST-12 as Mic Switcher.
Specification - Signal Method by Line Filter on 7th level -
Standard Spec.: