My old '465 will trigger on the 1pps, but it's far easier to see the
trigger LED flash than finesse the brightness/sweep to make it visible -
something possible only on a 'scope with a decently bright tube.
Another cheap/easy trick to detect the 1pps pulse is simply to "listen"
to it with an a
FWIW, I've re-crystalled a number of those 100 MHz-area '229 and
similar Vectron oscillators and have had pretty good results and I
thought that I'd make a comment or two.
The '229's that I've seen that operate in the 100 MHz area use TO-5
mount crystals operating at 1/2 the output frequency
Last week I noted that the FE-5680A's "barefoot" output was found to NOT
be a suitable 10 MHz reference for microwave transverters.
Specifically, I tested it on two different 10 GHz transverters and found
there to be objectionable levels of "grunge" on signals caused by
low-level phase modulat
Hello,
As has been mentioned here before, the output of the "non-tunable"
FE-5680A's has been noted to have low-level spurs in it - no doubt due
to the way the various frequency loops are derived within, some using
DDS techniques. It is for this reason that when I packaged my FE-5680A
in its
I, too, am one that cleverly managed to cook the '240 chip: Too many
clip leads in too small a space allowed the +15 to get into the lock
indicator pin while I was evaluating the unit. It, too, worked OK after
doing that.
Rather than order another 74ACT240 or even just an HC/T240, I rummaged
