GRAPHIC ANTENNA SWR SWEEPER
WITH SYNTHESIZED GENERATOR FOR HF THRU 2M
This is a self contained unit that can step a PLL controlled signal source through 1.8-80MHz and 100-180MHz or any sub-portions of those bands. The current software can sweep, measure SWR using a detector head, plot the results on the built-in LCD color display, and optionally send the results to a PC over a serial port. Various sweep options are provided (manual/automatic, preset ranges for Amateur bands, etc.). Upgrades are via ICSP of the two PICs (one 18F452 main controller and one 18F452 graphics display controler). A debugging mode via PC over the serial link is also built in. There is an analog meter that can monitor the rwo DC amplifier channels and RF output level for setup and sanity checking of what the software is really doing.
The unit is housed in an old Motorola test set box and powered by 10 AA NIMH cells.
RF DETECTOR BRIDGE