[Yaesu] Fw: DSV-2 Control FT1000MP

[Ronald Walters]

PS - searched the archives and didn't find much info.

----- Original Message ----- 
From: "Ronald Walters" <rwalters8 at cfl.rr.com>
To: "Ft1000MP" <1000mp at mailman.qth.net>
Sent: Friday, July 23, 2004 17:18
Subject: DSV-2 Control


> I am considering wiring the DSV-2 input and output for use with the sound
> card input and output for digital operations such as MT63, HELL, PSK and
> MFSK.
>
> I now use the packet input for three of the above but my vintage FT1000MP
> will not allow me PKT operation on USB, since MT63 is sideband dependent
if
> I want to operate that mode I have to use USB.  I have tried the patch
input
> and it appears to work OK, however I hear a hum using the patch input and
> yes the microphone is disconnected.  I first thought it was a ground loop
> problem but I installed isolation lines and they did not help.
>
> So I have seen several circuit that utilize the DSV input and output on
the
> accessory socket and have had several other ham recommend that port as a
low
> level input and out put which I understand is similar to the PKT low level
> out-in which has worked very successfully for me.
>
> What I can not determine or find the answer to is what is the specific
> functions of the control #1 and control#2 on the DSV jack.  I believe one
is
> for muting the microphone and patch input while using the audio in pin and
> the other is used to control and direct low level output to the AF out
pin.
> Which one ?  Also most circuits for an external interface use the RTS pin
on
> a RS232 port, if I am not mistaken that pin has two states, -12V and +12v
> DC.  What I am not sure of is the actual control voltage if any need to
> switch the control pins on the FT1000MP, it may be just a ground
connection
> and using a 2n2222 or similar device could via the 232 RTS control there
> functions.
>
> I have searched the WEB trying to get the necessary information but have
not
> determined the correct answers to the above.  Can anyone direct me to the
> correct functions and voltage or lack of voltage to utilize this accessory
> jack?
>
> Appreciate the help.
>
> Ron - W4LDE
>