[na-user] Re: Voice Blaster to DVS port

[becker@shell.portal.com (Tony and Celia Becker)]

At 03:33 PM 9/10/96 +-100, ke7gh@contesting.com wrote:
>   c) interface to Yaesu DVS jack

Here you are.
DESCRIPTION OF FUNCTION OF FT-990 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 +12V          

WIRING DVS PORT 8-BIT SOUND BLASTER FOR USE WITH LTAs "CONTEST VOICE BLASTER"
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   +12V       Power Supply     
5    DVS0      DVS control line
6    DVS1      DVS control line
7    GND       Ground
                                                                   
                to Sound Blaster Mic input-+                       
from Sound Blaster Speaker output----+     |                                    
        
(USE A 1:1 TRANSFORMER)          +---^-----^-------+               
                                 |   |     |        \>| 2N3906     
                                 |   |     |          |----+-----+ 
                                 |   |     O        /-|    \     \ 
                       +---------+---^--O4 2 5O----+       /     / 
            2N3906  |</          |   +-O1     3O-+         \ 330 \ 330
                 +--|            |      O6   7O  | SW      /     /
                 \  |-\          |      |  ^  |  | ON AIR  \     \
                 /     |         |      | DVS |  | ___|    |     |
                 \ 330 |         |      |     |  +-O  O----+     |
                 /     |         |      |     |            |     |
                 \     | 2N3906|</      |     |            |     |
                 |     +-------|        |     |            |     |
                 |     \       |-\      |     |            |     |
                 |     /          +-----+     |            |     |
                 |     \ 330                  |            |     |
                 |     /                      |            |     |
                 |     \                      |            |     |
                 |     |                      |            |     |
                 |     +----------------------^-------+----+     |
                 |                            |       |          |
                 +----------------------------^-------^----------+
                                              |       |          |
                                 1000         |     |/ 2N3904    |
Printer Port pin 3, D1-----------/\/\/--------^-----|            |
                                              |     |\           |
                                 1000         |       >        |/ 2N3904
Printer Port pin 2, D0-----------/\/\/--------^--------^-------| 
                                              |        |       |\ 
                                              |        |         >
                                              |        |          |
Printer Port pins 18-25-----------------------+--------+----------+ 
                                                                                
                                                                                
                                                                                
                                                                                

AE0M, Tony Becker - becker@shell.portal.com - Silicon Valley, U.S.A.

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