Hello Fred, I just tested my TS-790E with 12.8c (I hadn't used that radio for a longer time). With my settings CAT control works flawlessly. Frequencies and modes are set and updated correctly when I choose a satellite. When I switch between u/v and u/v sats it is necessary to click the satellite ident letter twice to activate the changed RX band.

My settings in menu "Radio Setup": brand Kenwood, model TS-790, baudrate 4800, CAT delay 70, option "Satellite mode" checked (only in the program, not at the radio), option "RTS +12V" checked. That simulates RTS high and may be necessary with 12.8c in some cases. So, try wethert that helps. With 12.8c I use a new component for COM port control witch allows port numbers up to 100 (the old MSComm32.OCX supported only up to 16 port numbers).

I use the Kenwood IF-232c interface connected to the PC via a USB-to-Serial adapter with FTDI chipset. The cable betwen USB-to-Serial adapter and interface is a (homemade) straight forward RS-232 cable (no null modem) with lines ground, RxD, TxD, RTS and CTS wired. Recently another user (Paul, LB2BG) reported that he got his TS-790 working with SatPC32. I will forward his mail to you. Perhapas he can tell you how he has connected the radio to the PC.

With the TS-790 the the downlink must appear in the right window (SUB).

73s, Erich, DK1TB

Am 03.11.2016 um 21:30 schrieb Fred Castello:

Hi folks,

I am trying to get back into the satellites and have a Kenwood TS-790A which I am using with SatPC32 Ver12.8c. I am using THIS http://www.ebay.com/itm/261186601463cable for CAT control (after research it seemed to be one of the best and reliable cables for the purpose).

During the operation of the radio during a pass using AO-85 I have found that SatPC32 keeps switching the mode from FM to USB. It stopped doing that when I disconnected the USB to accessory plug but of course it stopped correcting for doppler as well. When I investigated this I noticed that the AO-85 line in the DOPPLER.SQF file seemed to be missing a comma, see below:

; For Hints look at the end of this file. ; Do not remove or modify these first ; 3 lines of the file, starting with ';'! AO-85,145980,435180FM,FM,Nor,0,0,Voice U/V AO-10,145900.0,435100.0,USB,LSB,REV,0,0 AO-73,145960,435140,USB,LSB,REV,0,0,Voice U/V AO-73,145935.0,,USB,,,,TLM ........

I corrected that and saved it and restarted the computer and the program. It continues to do it and I can't figure out why. So, on this radio there is a "Main" channel which is on 70 cm which I transmit on and there is a "Sub" channel which is on 2 meters which I receive on. The "Main" channel tracks the doppler correctly and remains on FM but the "Sub" tracks the frequency correctly but keeps switching to USB. Does anyone have any thoughts on how to correct this or am I doing something wrong? Thanks so much for your time. Regards, Fred Castello, KF4FC Fishersville, VA _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb