This isn't even funny any more
I finally got around to trying out the Copernicus GPS by sparkfun:http://www.sparkfun.com/commerce/product_info.php?products_id=8146
with this antenna (which shouldn't matter here):http://www.sparkfun.com/commerce/product_info.php?products_id=177
I hooked up 3.3V to VCC, ground to ground.
I hooked up an oscilloscope to ground, and to both Tx-A and Tx-B (I tried both).
I kept it on outside for 20 minutes . . . it's cold out there!
Guess what happens? Nothing. No TLL signal. Tx-A gives a constant 1.8V, and Tx-B gives a constant 0V.
So I start reading the manual in detail, and see this on page 25:
"If you are using the serial port option, the XSTANDBY pin should always be held high."
So I apply 3.3V to this pin, but no change.
page 13 says:
"XRESET Active low logic level reset. Connect to VCC with or without a pullup resistor, if not used."
I apply 3.3V, no change.
Anyone manage to get this to work?