SO2R Box

My station wiring looks something like the following:

The hardware for each rig is an Omni VI+/DSP-599zx/IBS-1. The IBS-1's control the bandpass filters and will eventually control the antenna selectors (currently that is manual). The audio isolation box is just the standard 1:1 transformers and a voltage divider. The computer is a homegrown PIII/600. The COM ports above 2 are via USB to serial boxes made by Entrega (now owned by Xircom). The SO2R box is described below. The IBS-1's are no longer available, but Array Solutions has replaced them with the DBS-1. It appears that the DBS-1 works off of the same signals in a more convenient package.

I use the following as my main SO2R controller. It is mostly just a collection of level converters matching the RS232 levels of several serial ports to TTL levels used by radios for various functions. Coupled with the WriteLog contest logging program and my FKeys utility the board provides the following:

	"OR" three keying inputs with WriteLog generated CW for keying modern transmitters (auto A/B switching)
	Level conversion for FSK keying via WriteLog for two radios
	CI-V interfaces for two IBS-1 automatic bandswitches
	A/B output

The requirements to make this work are:

	WriteLog using rig control for two radios (two serial ports)
	FKeys utility
	Two serial ports for FSK
	One serial port for CW (may share with rig control)
	One serial port for A/B signal
	Two serial ports for bandswitch information

Click on the pictures below for a larger version.

The PC Board

The Schematic