[TimeWave-AEA] DSP599 on RTTY & PSK

[Thomas Beltran]

I would like to use the internal modem of the DSP 599zx on RTTY and PSK, but
cannot seem to get it to work.  The specific problem is getting it to key,
and on receive, the band width is too narrow for my taste, I would like to
widen the bandwidth so I can see all the PSK signals.  I am trying to use it
with an FT-1000 Mark V.

First, the receive issue.  I think the designers had planned that the very
narrow bandwidth would reject QRM, which it does very well, but the
waterfall is
almost unuseable because it is so narrow.  How does one "tune around" on PSK
(and then perhaps engage the narrow bandwidth?  For example, with my
rigblaster, which has a wide bandwidth, I can just click on any number of
signals.  When I turn the tuning knob on the rig, nothing seems to change on
the waterfall.  Of course the manual states that it must be used with
"appropriate software," however, there is absolutely no guidance in this
regard.  The software I am using is WinPSKse - is this appropriate?

As far as instructions for the different modes, on page 1 and, I guess, just
in case we miss this information, it is again repeated verbatim on page 2 of
the supplement, there is a little blurb that you can "now operate  RTTY,
PSK31 AND SSTV with just the DSP-599zx, . . ."  Yet there is no further
mention of RTTY in the supplement.  On page 4, at the bottom, under
"Operation," it now even drops SSTV from the discussion.  Does anyone know
if this PC-Radio setup have anything to do with RTTY, or does one follow the
older instructions in the main manual?

Here is what I did:

I connected the DSP Line A OUT to the "Patch" plug on the back of my radio.
The Yaesu manual states "This input jack accepts transmitter
audio - either AFSK or voice - for transmission.  This line is mixed with
the microphone audio input line. . . impedance is 500 to 600 Ohms."

I connected the PTT OUT A to the PTT jack on the back of the radio.  The
Yaesu manual states that "this input jack may be used to provide manual
transmitter activation using a footswitch  or other switching device.  The
same line is available at the Packet and RTTY jacks for TNC control. . . .
Open circuit voltage is +13.5 VDC, and closed circuit current is 1.5 mA."

>From the manual excerpts, does it appear that these connections are correct?

I took the soundcard connections directly from my rigblaster, which works
fine, as well as the serial port.  I would appreciate any information or
experiences that others on this list have had.  Tom W6EIJ