TCXOs come in various output formats. I've seen PECL,
LVCMOS and "clipped sine wave" myself, recently. If you
are looking for something 50-ohm compatible then LVPECL
might be your pony. But this will be square-ish and have
a lot of upper harmonic content. Seems like this is a radio
type deal and an -un-clipped sine would be your preference.
And/or, a "good enough" filter (which could incorporate an
impedance transformation, if desirable).
Now, if this signal is indeed just the ref clk for an IC PLL,
unloaded HCMOS may be the right answer - no blocking
cap, no termination resistor, you are just bang-banging a
logic level phase detector (perhaps via a few stages of
balanced CMOS inverter gain, which enables use of low
power RF reference signals - but does not preclude better
edge-rate ones). Dig in a bit, there.
+17dBm power presumes the 50-ohm system. Which this
frequency does not need at short-haul interconnect distances.