June 25, 1995

Hi Gang,

Here is the DSP-93 demod for UO-11 telemetry. You receive on FM,
at 145.825 MHz  doppler. I find tuning fairly critical, so keep
an eye on discriminator centering.

All you need to hook up is input audio. The data is output directly
from the DSP-93 UART, so you don't use the TNC with this program.
Note that the DSP-93 UART to PC link runs at 19.2 kbps, with 8 data
bits, one stop bit and no parity (standard DSP-93 setup). The demod
translates UO-11 data sent at 1200 bps, 7 data bits, even parity,
and two stop bits.

LEDs:

1          not used
2          data sync detect
3          not used
4          not used
5          DCD (off true)
6          signal level
7          program duty cycle (program running)

Adjust the input level on LED 6 for 10-25% brightness. You should
see LED 2 ON steadily when receiving a good signal from UO-11.

I copy using PROCOMM. Any standard terminal program should do.

On a strong signal copy is pretty good.

Files:

uo93t1.obj      radio port 1
uo93t2.obj      radio port 2


73 Frank WB5IPM

 License and Disclaimer

 A no cost, non-exclusive license to use the enclosed software is granted
 to all users of the TAPR/AMSAT DSP-93 DSP computer, with the restriction
 that it be used only for non-commercial amateur radio applications. ALL
 other uses are prohibited under this license. Copyright 1991, 1992, 1993,
 1994, and 1995, Frank H. Perkins, Jr., WB5IPM. All rights reserved.

 This software is EXPERIMENTAL. It is offered AS IS, without Warranty or
 Guarantee of any kind. NO representation is made that this software is
 suitable for any purpose, or that its operation is reliable. Use this software
 strictly at your own risk. The author, AMSAT and TAPR accept no liability
 for any loss or injury arising directly or indirectly from its use.

 Never use this software under circumstances where its failure to operate
 or its failure to operate as expected, or the failure of the attendant
 hardware could create a dangerous situation, cause loss of data, or could
 cause damage to your amateur radio equipment, computer equipment, or
 any other equipment or property.

 Please contact Greg Jones at TAPR or the author for information on
 commercial licenses of this software.

 Frank H. Perkins, Jr.

