We time nuts now have a set of manuals for the Austron 2201a GPS receiver. Thanks to K4CLE for the ops manual and I had the service manual they have been encoded to pdfs and uploaded to Diddier's site for posting when he gets ready. Diddier upload puts them in root???
The service manual is 600 DPI so there are 4 files approx 6 MB each. The Ops manual is at 300 DPI and is a single 4 MB file. So the good news is that these austrons can be made to work. Even without the always missing antenna. Couple of points. You have to set the week and day back to 1992 or 1024 weeks ago. Its good if its been off to use manual mode and select a sat high in the sky to reload the almanac give it an hour. Further the memory batteries almost always dead replace it and make sure the memory draws 10 ua or less. Otherwise you have to go back through the setup again every time you power it. Those nasty missing down converters. Using a Odetics down converter (Thanks Pete of time-nuts fame) a fairly reasonable 35.42 Mhz to 75.42 Mhz up converter can be built but it uses filters and multiplier tanks and not sure those are that reproducible.. This allows the receiver to work measure various offsets like an HP3801 down in the 4.5 X e-12 region after 2 days. Thanks to Doug above I am trying two methods to use a Novatel starview receiver that also puts out a 35.42 Mhz IF. The methods have to do with trying to build the simplest of up converters. One method has worked, but you need really good eyes to connect into the circuits. Also trying an even simpler method, but its unclear its working very well. All of these methods are very inexpensive if you can find the odetics or starview receiver. Regards Paul WB8TSL _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
