Hi Clayton, You wrote: "The only drawback to the solution was having to swap coax lines between 2m and 70cm. " SatPC32 can optionally control a coax antenna switch (called "transfer switch" as far as I know) that swaps the 2m/70cm antennas between the radios when you switch between v/u and u/v satellites. The DTR pin of the Radio 2 serial port can be used to either feed a CAT interface or to steer the antenna switch (selectable in menu "Options"). Mike, W4UOO, suggested such feature and I added it a few months ago. The feature requires a 1-transistor buffer between the DTR pin and the coax relais. There is an example on my website www.dk1tb.de/AntSwitchIF.jpg 73s, Erich, DK1TB
Am 23.01.2016 um 03:37 schrieb Clayton W5PFG:
Graham,
I know you specifically said you prefer Linux, but the solution which brought me the most success was HDSDR+SatPC32. The two applications talk together well via CAT and a pair of virtual serial ports. This gives you full Doppler shift adjustment by computer control.
My FT-857D was configured as a radio in SatPC32. The FCDP+ was configured as the other radio in SatPC32.
If you moved the dial on the radio, there was full, tracking feedback to SatPC32 and HDSDR. If you tuned on the HDSDR, it adjusted the radio as well.
I made several hundred contacts on all the available satellites during the time I was playing with this in the shack.
The only drawback to the solution was having to swap coax lines between 2m and 70cm.
73 Clayton W5PFG