Cheap genlock/ref.signal generator

Can anyone suggest cheap one? Or can I use blackmagic mini converter ref. generator with simple bnc splitters to output genlock reference to ten or more devices?
Thanks!

Genlock (blackburst) is an analog composite signal so any composite video distribution amplifier will work. I'm not sure what you mean by cheap, but I'm partial to the Grass Valley ADVC G4 sync generator. It has 9 outputs and can be cascaded to add capacity. It's $575 USD

just as an fyi i've had nothing but headaches with bmd stuff and using external ref ... actually using older ecohlab "used to make atem" product ... apparently the video hub sync issue is fixed however with synced cams, 1me and etc etc entire system in time its caused signal drops and unexplained glitches ... soon as you take away ref never had an issue ... now not saying that its one thing or another just saying do some extensive testing before you use live ... oh and fyi yes all the stuff was running latest firmware.

and yes any analog da should do the trick, however i'd stay away from stuff with eq and gain adjustments it can cause issues as well.

Thanks Chad for ADVC G4 info.
Brian, are you using "black burst" or "tri level sync"?
If you are in HD "tri level" is much more stable then "black burst". Maybe that is the reason of your gliches and errors?

Ther's nice explanation: youtu.be/qqmbrt17DjE

http://www.rosendahl-studiotechnik.com/nanosyncs.html

This one. Gives you Trilevel & Blackburst REF + wordclock on the same machine.
Super easy to configure.
Somewhat cheap.
Can be cascaded.

We do everything in HD, but still use blackburst for sync, and never have an issue.

To be fair, we're a TV station, and I'm sure the blackburst generator we use is a pretty good one.