The CDG2000 TX Low Pass Filter
This is one of the simpler boards. It is a conventional switched low pass filter followed by a directional coupler for VSWR detection. There are 6 filters, switched by relays.
The following links provide constructional data, performance information, schematics and PCB layouts.
Note the PCB and schematic were updated May 2003 to correct relay reversal problem.
|Description||PCB component placement|
|Schematic||PCB tracking||Directional Coupler Performance|
|PCB tracking reversed|