[GreenKeys] HAL DXP38

[Paul Christensen]

I've recently acquired a HAL DXP38 DSP-based terminal unit.  My goal is to
use it together with an analog oscilloscope to obtain a Lissajous pattern
during RTTY receive.  The DXP38 uses an array of X and Y LEDs to mimic a
scope but it does represent the phase difference between tones.  Cool, but
not as cool as a Lissajous pattern on a phosphorus display.

I have the DXP38 manual but there's no schematic.   Without a schematic it's
difficult to ascertain if the mark and space tones can be tapped -- or if
mark and space are embedded in DSP with no means to tap analog audio after
filtering.

1) Anyone have a DXP38 schematic?
2) Does anyone know if mark and space audio can be tapped from the DXP38?
If so, where?

Paul, W9AC