Jim My guess would be the antenna does not have a clear view, high lead loss. Or the mask angel is set to something crazy. Paul WB8TSL
On Fri, Jul 12, 2013 at 3:56 PM, Jim Sanford <wb4...@wb4gcs.org> wrote: > All: > My Nortel receiver has been running for 6 days now. I am running the Lady > Heather software, but also have TBOLTMON. It shows my position fairly > well, but I have seen a negative altitude, and am currently seeing 1565' > altitude. Based on local maps and the GPS in the car, I believe the > antenna to be no higher than 1280'. I get lock with 4 to 6 satellites > colored green. I have seen PHASE LOCKED, but am currently seeing "recovery > mode" and the LOCKED LED on the unit is flashing, which I think I remember > means recovery. > > I have several questions: > 1. Sometimes position is displayed in yellow, sometimes in white. What is > the significance of the color? > 2. I see TC 100.0 sec, DAMP1.200, GAIN 1.2 Hz/v, INIT 3.00V. When I go to > KE5FX site, his values for TC, DAMP, Gain and INIT are very different. In > particular, if DAMP is damping in a control loop, I am not surprised that > my very overdamped unit is not locking. Question: Are these parameters > that will converge, or are they parameters I should try to set? The > heather.cpp files suggests that they may be settable, but does not say how. > 3. On my plot, I see an RMS value in green, which suggests to me that > something is happy with the DAC voltage, even if very different from > John's. The scale is 100000uV/div which suggests to me that it is NOT > locked. > 4. On my plot, I see an RMS value in yellow, which suggests to me that > the temp is OK, but the scale on temp is growing.... at the momoent, > 10mC/div; John's is 50 mC/div, but a much smoother plot than mine. What is > this telling me? > > ROM,RAM, OSC, FPGA, POWER, EEPROM, ANTENNA, ALMANAC, DISCIPLINE, SAVED > POSITION status are all OK, even though altitude is bad. > Can anyone help me understand what I am seeing, and in particular, why it > won't lock, or stay locked, when it is seeing good sat signals? > > Thanks! > Jim > wb4...@amsat.org > > > ______________________________**_________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.