Afternoon All
For several weeks, I've been struggling to get my U2 kit working with a EM-406A GPS module. The problem seems to be with the 1pps signal. as the NEMA data is read correctly.
Today, I got through the post a Fastrax (Reyax) UP501 GPS module (from Taiwan via E-Bay, ???17, about 10 days delivery time). Hans lists this module on the U2 kit web pages. It requires a 3.3v supply and the modem setting is 09600,10,1,8. Hey presto! It works! I found that the "Inv GPS" setting needs to be "On". The clock keeps perfect time (as compared against my wireless clock), the Locator is set correctly and the DDS 125MHz oscillator frequency is corrected (mine is now slightly lower than 125 MHz). At present I have "Start" set at 02 and "Frame" at 04 and the U2 is on soak test on 20m WSPR with a "loop" made from two pieces of wire about 15cm long, joined by a 47R resistor.
73
Barry, G8AGN
