This zapper Ross DVB-S 5010 (rebadged Fortec ?) is probably a good start for
a hacking exerciser.
Pointing that 6in1 "universal" in search mode at the Rx , just for on/off
and channel change on the front display shows a response to at least 33
different codes assigned for different types of equipment. The inverse is
true but not so easy to put a figure to it.
Now to find a couple of other equally malign and useless corrupting makes
and models of zapper.
any ideas for suitable googling phrases?