Ron,

First make sure that you have selected VO-52 and it is the currently active satellite. The satellite you have selected will be listed on the top bar of the program window and highlighted on the screen. Next click on CAT in the menu bar to open the CAT Tuning window. The window should display one line, "135900/435250 USB/LSB" Click on the C-, which changes to C+, just below your QTH location in the upper left, for CAT operation. I suspect you are already doing all of this correctly. When you put SATPC32 into CAT mode (C+) for VO-52, the following should happen: - The IC-910H should switch to Normal satellite mode. - The Upper band on the radio should switch to VHF, USB, 145,900,000 minus doppler correction (assuming rising satellite). - The Lower band on the radio should switch to UHF, LSB, 435,250,000 plus doppler correction. Check the last 3 items before proceding. I sometimes have to repeat the C+, C-, C+ steps before the radio and SATPC32 synch up. - When you key the microphone, the lower UHF band should transmit - VO-52 is U/v, UHF uplink, VHF downlink, opposite of AO-51... - While transmitting, you can adjust the uplink or the downlink in the CAT window to get the pair tuned properly. Once that is done, you can tune up and down the translator bandwidth to find other stations.

I hope this helps. If not email me directly with a step by step discription of what is happening.

John Kopala N7JK

From: Ronald Nutter rnutter@networkref.com Subject: [amsat-bb] SatPC32 and ICOM 910H question To: amsat-bb@amsat.org Message-ID: 4804DD4D.3020303@networkref.com Content-Type: text/plain; charset=ISO-8859-1; format=flowed

I am trying to learn how to use SatPC32 for Doppler correction on the SSB birds. I have run into a "brick wall" in terms of how it is operating that is giving me some fits.

When I put SatPC32 into CAT mode, the radio shifts into the appropriate frequencies but it wont transmit on the right band. When I press the M/S to swap the displays around so that it will transmit on the correct band, the radio stops adjusting to what is shown on the SatPC32 display.

Can someone point out what I am doing wrong or do I need to change to one or more of the config files in SatPC32 ?

Thanks, Ron KA4KYI