IMSAI Guy goes through the fundamentals of rise time and bandwidth relationship, explains why 0.35 has become 0.45 and then uses LBE-1321 for scope evaluation in part 2 of his video
www.youtube.com/watch?v=FO_1...

We are getting ready to release a small batch of low phase noise OCXOs:

-115dBc/Hz at 1Hz offset
-170dBc/Hz noise floor
30 femtoseconds jitter in 1Hz to 100Hz range
Two 10MHz outputs with +11dBm 50Ω SMAs
No significant spurs
Mains powered

Who is interested?

Now this is what I call a quartz crystal

New LBE-1321 fast rise time pulser:
30 picosecond pulse edge speed
Any frequency from 30kHz to 300MHz with 1Hz resolution
Variable voltage up to 1.5Vpp
USB-C power
Metal enclosure
www.leobodnar.com/shop/index.p...

Our new fast edge pulse generator LBE-1322 leobodnar.com/shop/index.p... has 30 picoseconds rise time and variable pulse rate from 30kHz to 300MHz with 1Hz resolution.
1Vpp output.
Trigger output for sampling scopes.
External sync input for 1MHz - 25MHz source.

[corrected the link]