I initiated a survey a few hours ago.
Now it thinks I'm at 175' altitude (more like 1280') and calls the saved
position good.
What is the "normal stuff" to save the position??
Finally, every time that the satellite count changes, there's a huge
(150,000 uV or so) excursion in the DAC voltage, so it never converges
to small variation like I see when I look at the KE5FX site -- what is
this telling me?
Thanks,
Jim
On 7/13/2013 8:44 PM, Bob Camp wrote:
Hi
On mine, I did a full reset and let them start from a survey. After they
figured out where they were, I did the normal stuff to save the position.
Bob
On Jul 13, 2013, at 5:58 PM, Jim Sanford <[email protected]> wrote:
Bob:
Correct, the Trimble Nortel box. Replaced the old HP antenna with the 26db
amplified antenna which came with it, also mounted higher, and more clear of
the roof. It is seeing 5 satellites, 3 in yellow, and still says RECOVERY
MODE. It also (now) says, SAVED POSITION BAD, which I would expect, with a
300' error in elevation.
Jim
On 7/13/2013 9:04 AM, Bob Camp wrote:
Hi
I believe what you have here is a Trimble / Nortel box rather than a TBolt - is
this correct?
If so there are a number of differences in what you can and can't do with LH.
Also since it's a different design, the filter is set up differently.
That said, it should show lock, sats, dac voltage, and status correctly.
Bob
On Jul 12, 2013, at 3:56 PM, Jim Sanford <[email protected]> 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
[email protected]
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