[1000mp] DSV-2 Control

[Harry Yingst]

DESCRIPTION OF FUNCTION OF DVS PORT
                     
PTT  DVS0 DVS1 Function
"1"  "0"  "0"  Receiver Audio at Voice Out, Voice In muted
"0"  "0"  "0"  Voice Out and In both muted
"1"  "0"  "1"  Transmitter Mic. audio at Voice Out, Voice In muted
"0"  "0"  "1"  Transmitter Mic. audio at Voice Out, Voice In muted
"1"  "1"  "0"  Voice Out muted, Voice In signal at Receiver Audio
output
"0"  "1"  "0"  Voice Out and In both muted
"1"  "1"  "1"  Voice Out and In both muted
"0"  "1"  "1"  Voice Out muted, Voice In signal at Receiver
               Audio output and Transmitter Audio

"0" means pin at ground, "1" means pin at Vdd 


The Yaesu DVS port 
Pin# Name      Description
1    VOICE IN  Input from Sound Blaster Speaker output
2    VOICE OUT Output to Sound Blaster Mic input
3    PTT       Push To Talk control line
4    Vdd       Power Supply, +12V for FT-990 or +9V for all others.
5    DVS0      DVS control line
6    DVS1      DVS control line
7    GND       Ground





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Harry - AB2PN

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