Section 4: Software Commands
8197 Instruction Manual
Page 4-13
The
Display Histogram
command,
DH
, provides the tracking histogram. The
histogram records the number of satellites tracked each second. At the end of
every hour, a log entry is created and the counters start again. In
Read Mode
the command responds with the last four entries of the histogram and current
histogram in process. While in
Test Mode
, this command responds with the
entire histogram log, which provides tracking data collected over the past six
days. The page parameter,
P
, causes the histogram to display one page at a
time. In paged mode
the user may quit or continue the display after each page is
displayed. The tracking histogram is useful in verifying receiver and antenna
performance.
Type:
DH <ent>
- OR -
DH P <ent>
(paged output)
The tracking histogram is output in the following format:
TIME= HH:MM:SS DATE= YYYY-MM-DD TRACKING HISTOGRAM
0= XXXXX 1= XXXXX 2= XXXXX 3= XXXXX 4= XXXXX
5= XXXXX 6= XXXXX 7= XXXXX 8= XXXXX Q=QQQQQ
Where:
HH:MM:SS =
UTC time log was created.
YYYY-MM-DD =
Date log was created.
XXXXX
=
Number of seconds the receiver tracked
the listed quantity of satellites since the
beginning of the hour, 0...3600.
QQQQQ
=
Number of seconds since the beginning
of the hour the GPS signal was
qualified, 0…3600.
