Robert, Two questions.
First, what is the voltage at the 9390 antenna connector with nothing attached besides your DVM ? Second, what happens if you just attach the antenna straight to the 9390 ? By this i mean if voltage is on the antenna connector and while you are observing it and then attach the antenna what happens ? I suspect there is some protection process with the 9390 and the load or reverse voltage present from the splitter is causing it to activate. However, I am not familiar with that unit. Just asking general troubleshooting questions. Bill....WB6BNQ Robert Watzlavick wrote: > I received my Symmetricom 58536A GPS antenna splitter today (new from > eBay) and did some testing with my Datum 9390-6000, Datum TS2100, and > Thunderbolt. The Thunderbolt and TS2100 work fine with the splitter but > the 9390 has some interesting behavior with the splitter. If the 9390 > is connected by itself to the splitter, it doesn't report any > satellites. However, if I then connect either of the other two > receivers (Thunderbolt or TS2100) to the splitter, the 9390 will start > picking up satellites. Then, if I disconnect the other receivers and > leave the 9390 connected by itself, it continues to work. I tested this > several times and it seems to be repeatable behavior. So as long as a > different receiver has been connected to the splitter at least once, the > 9390 works with it. > > I'm thinking the initial surge of connecting the 9390 to the splitter is > causing a momentary overcurrent which shuts down the antenna supply. In > the "failure" case, the voltage measured (with a T) at the splitter from > the 9390 is 0V. In the "working after a different receiver has been > connected" case, I measure 4.3V. The other two receivers output 5V with > no load and about 4.6V under load connected to the splitter. > > Has anybody seen this before? The antenna is a Symmetricom AT575 type > antenna. > > -Bob > > _______________________________________________ > 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.
