[time-nuts] Introduction of Z38XX
SAIDJACK at aol.com
SAIDJACK at aol.com
Wed Jun 24 04:17:23 UTC 2009
Hi Ulrich,
since our FireFly and Fury GPSDO's support GPSCon as well, I tried your
plot program.
We use 115.200 baud by default, but when I set your program to that speed,
it defaults back to 57600 for some reason. Changing our board's baud rate
fixed that problem.
Our status output is shown properly in your status window (see below), and
the *IDN? string is shown as well, but the program says "the last
smartclock status is undefined".
What commands do you use to query the GPSDO that it may be getting hung up
on?
Your software looks quite nice, and It would be great if your software
could support our units like GPSCon does.
Thanks in advance,
Said
The status window in your software shows the following:
:SYSTEM:STATUS?
AQUISITION ................................................
Tracking:10 Not Tracking: 3
PRN El Az SS PRN El Az
2 42 175 24 14 0 331
4 59 119 21 28 17 101
9 59 283 33 51 44 156
12 27 303 25
15 6 218 11
17 36 49 29
20 1 47 19
26 18 267 29
27 65 250 33
48 45 197 39
UTC 4:12:45 24 Jun 2009
LAT N 37:16:17.915
LON W 121:57:26.719
HGT 71.20 m (MSL)
HEALTH MONITOR................................................
OCXO Current: OK EFC: OK
GPS Receiver Status: 3D Fix
1PPS SOURCE MODE : GPS 1PPS SOURCE STATE : GPS
GPSDO Status : Locked
In a message dated 6/23/2009 02:29:05 Pacific Daylight Time,
df6jb at ulrich-bangert.de writes:
Z38XX talks to the Z3801/5/16 with a exact 10 s time base which means the
PPS TI delivered can be used for the computation of Allan deviation (and
other measures) of the internal phase comparator with a Tau0 = 10 s (which
is done internally in Z38XX similar as in Lady Heather).
The sat's horizont line in the Azimuth / Elevation chart will look strange
in the first hours after program start. Give it some days until it looks as
attched or even better.
Have fun
Ulrich Bangert
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