June 25, 1995

Hi Gang,

These updated programs are for AO-13 telemetry and they will directly 
feed the PC3.EXE AO-13 telemetry software. Contact w8gus@tapr.org
for more information on P3C.EXE.

Versions:

      p3c93t1.obj       radio port 1, ground to tune
      p3c93t2.obj       radio port 2, ground to tune

NOTE: DATA IS OUTPUT FROM THE DSP-93 UART. YOU DON'T USE THE TNC
WITH THIS PROGRAM. Data is output at 1200 bps, and DCD handshaking
is implemented as needed by P3C.EXE.

ON upper SSB, adjust the audio so the amplitude LED (6) is about
30-50 % lit as showing some variation. Start from a frequency well
below the AO-13 telemetry signal and tune upward slowly to grab the 
carrier at 1200 Hz. When lock occurs, LED 3 will light. If you 
continue to tune upward manually, the doppler tuning LED (4) will
light and tune the radio back down, assuming you have the down 
tuning line hooked up. Otherwise, LED 4 will remind you to manually 
tune to correct doppler drift. 

The two LED's on the far left light up tell you that you have detected
the telemetry "sync" vector - you get 514 characters and it pauses until
it decodes another sync vector. 

When you exit this SW the UART will be set up for 1200 bps so reset the
DSP-93 to get back to 19200.

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
 and 1994, 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.

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.


April 1, 1995 @ 10:00 CST

Hi gang,

Here are the updated psk modems for the microsats:

packing list:

      psk93r1j.*       port 1, psk modem for microsats
      psk93r2j.*       port 2, psk modem for microsats

LEDs:

      1                 Smart Tune
      2                 PTT

      3                 DCD (pll locked with low phase error)
      4                 tuning pulses

      5                 NOT_DCD
      6                 level

      7                 Duty Cycle
      8                 Power

The 900 MHz Butterworth filters used before have been replaced with 660 Hz 
Bessel filters. This has improved the performance of the modem noticeably 
at my QTH. Live DCD has also been added via a lock detector on the Costas
loop detector.

LED 5 is in "parallel" with the low true DCD line to the modem disconnect, 
and goes off (low) when DCD is asserted. LED 3 is the inverse of LED 5; it 
goes on when DCD is asserted. The DCD action sort of jumps between 
these two LEDs. The PTT LED operation was borrowed from W5RKN.

This update also adds modem reset via sending an "r" or "R" character to 
the modem through the DSP-93 UART. 

Notes:

1. For satellite operation and loopback testing, set your TNC to FULLDUP.

2. The TNC DCD light on my UNMODIFIED MFJ1270C does not light with DSP-93
DCD assertion, but the TNC software does correctly hold off the transmitter. 
(The DCD light on the MFJ1270C is operated directly by the on board modem for
some reason - thanks to W5RKN for this observation.) I believe Mark Hammond
KC4EBR has developed a mod for the MFJ1270C that operates its DCD light in
sympathy with the DSP-93.

3. The values of CNTH and CNTL are set for my ICOM 475H. The 475 tunes in 
50 Hz steps. These values may have to be adjusted for other radios. CNTH 
sets the time from the start of one tuning pulse to the next tuning pulse,
and CNTL sets the width of the pulse. Current values are CNTH = 288 and 
CNTL = 186. Try reducing these values (proportionately) to increase the 
tuning rate if the tuning doesn't keep up on a high pass with heavy doppler 
shift.

4. 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
 and 1994, 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.

73, Frank WB5IPM
September 4, 1995 @ 19:32 CDST

We picked up a bug in PSK93X1A/2A.OBJ and PSK93X1B/2B.OBJ that caused
them to occasionally false tune when loaded under quiet conditions.
Here are the latest (95.09.04) PSK*.OBJ updates with corrections
for the above mentioned code:

ICOM/Kenwood standard (ground-to-tune) PSK modems (AO-16, etc.).
Update includes a brighter SmartTune light:

      PSK93R1K OBJ         5,003 07-29-95  11:57a - radio port 1
      PSK93R2K OBJ         5,003 07-29-95  11:57a - radio port 2

ICOM/Kenwood weak-signal PSK modem (AO-16, etc.). Update includes a
brighter SmartTune light, with the PLL gain increased and tuning
interlock disabled to improve lock recapture after a fade: 

      PSK93R1L OBJ         4,999 07-29-95  11:57a - radio port 1
      PSK93R2L OBJ         4,999 07-29-95  11:57a - radio port 2

YAESU ground-to-tune standard PSK modems:

      PSK93R1Z OBJ         5,003 07-29-95  11:58a - radio port 1
      PSK93R2Z OBJ         5,003 07-29-95  11:58a - radio port 2

YAESU ground-to-tune weak signal PSK modems:

      PSK93R1W OBJ         4,999 07-29-95  11:58a - radio port 1
      PSK93R2W OBJ         4,999 07-29-95  11:58a - radio port 2

YAESU 5 V pulse-to-tune standard modems. TX output level tweaked
for use with the 736 back-panel data jack.

      PSK93X1A OBJ         5,060 09-04-95   7:19p - radio port 1
      PSK93X2A OBJ         5,060 09-04-95   7:20p - radio port 2

YAESU 5 V pulse-to-tune weak signal PSK modems, with tweaked TX.

      PSK93X1B OBJ         5,056 09-04-95   7:20a - radio port 1
      PSK93X2B OBJ         5,056 09-04-95   7:20p - radio port 2

LED definitions, etc. are the same as the prior PSK release.

73 Frank WB5IPM
fperkins@onramp.net

 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.
September 4, 1995

Here are the APT updates:

      apt93r1w.obj       same as old apt_93b.obj
      apt93r2w.obj       radio port 2 version of apt_93b.obj

      apt93r1a.obj       visible light sync version, port 1
      apt93r2a.obj       visible light sync version, port 2

The "a" versions now include sync to the 1040 Hz visible light signal.
When using IMDISP for display, Now just enter lines = N (400 - 800 typical),
samples = 2400, bits = 8 and header = 0. The visible light scan will be 
centered for viewing (640 x 480). The signal-to-noise needs to be pretty
good for the sync to work (LED 1 blinks on sync) so use the "w" versions 
if you need to get every line of the pass and don't mind manual centering. 
See the original instructions for other operating hints.

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.
A ported verion of the W9GR audio DSP code, for the DSP-93.
