The BITE signal is the only way to to know if it has a lock... Wayne
> On Mar 22, 2016, at 4:37 AM, Bob Camp <[email protected]> wrote: > > Hi > > There are probably a dozen or more things that contribute to the BITE output. > It could be > a regulator out of range. It also could be the VCXO nearing tune limit. If > the unit locks up and > seems to work, I’d ignore it and move on. > > Bob > >> On Mar 21, 2016, at 9:42 PM, Wayne Holder <[email protected]> wrote: >> >> I have a surplus LPRO-101 that seems to power up OK. The power draw starts >> at 1.7 Amps and then, after a few minutes, drops down to 600 mA, or so and, >> after this startup, the output shows a 10.000 MHz signal thats 's >> accurately as I can measure it. The lamp voltage is 6.2 volts, which seems >> within spec. However, the BITE signal that's supposed to indicate lock >> with a LOW level is always LOW and never changes. The docs say that BITE >> signal should start at a HIGH level to indicate no lock and then drop to a >> LOW when lock is obtained. So, this behavior seems all wrong. >> >> I opened the case and observed the purple glow of the lamp and probed >> around IC U401, which buffers the BITE signal, and saw the same signal LOW >> level. U401 is getting 5 volt power and the inputs to the AND gate used as >> a buffer for the BITE signal match what I'd expect. But, lacking a proper >> schematic, I'm not sure how to trace this back to the problem. Has anyone >> ever seen a symptom like this with an LPRO101? >> >> Wayne >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
