Thanks for the help, Andy... I muddled through it (it's a little odd the first
time you've normalized your Smith chart to 1800 ohms and the termination is 50
ohms!) and the filters do work as their data sheets say.

I did find that xtal filters can easily drive a network analyzer nuts... even
for looking at a single frequency, I had to significantly increase the
sampling time well above the default to get a stable display. I'm thinking
this is due to the absurdly high Q of the crystals causing a very long
transient response, thereby necessitating a long sampling time to finally
measure the steady state response.

---Joel