[time-nuts] Frequency standard

[Bob Albert]

Please excuse my ignorance but I have been trying to improve on my frequency calibration.
I have always used WWV but when I try to get really close in frequency, the beat and the fading are difficult to separate.
Someone suggested I get a GPSDO to refine my 10 MHz.  I looked around and have seen a few, mostly in the $100 range, but before I shell out fot something I know little about I wonder if someone can give me a short tutorial or at least some advice on what I need to do.
I live in Los Angeles so I imagine signals would be reasonably strong.  But what hardware and software do I need?  I want 10 MHz to put into my counter or, at least, to calibrate the time base in the counter.  I prefer the latter, since that means I won't have to receive GPS signals in order to measure frequency.  Most of the time I don't need really accurate results.
I could run an outdoor antenna if needed.  What receiver ought I look into, how much budget do I need, and all the other questions relating to this subject.
And finally, how much frequency error can I expect?
Bob