92
Serial Communication and Commands
Response:
V=vv S=ss T=t P=Off E=0
C
Format:
vv = Number of satellites, visible to the antenna, per almanac.
ss = relative signal strength (range: 0 to 255, nominal value = 15)
t = Number of satellites being actively tracked (up to twelve)
P = Off, Indicates that the time dilution of precision (TDOP)
calculation is not being performed. Returns 1.0 - 99.0, depending
on satellite geometry, when TDOP calculation is being performed.
A TDOP calculation is NOT performed if less than 3 satellites are visible,
OR if Position-Hold is active. E = 0, currently unused
Time Quality
Command:
TQ
Returns a single ASCII character (0, 4-9, A, B, F) indicating estimated worst-case time quality,
which follows the IEEE Standard, P1344.
Response: h
C
(h = Condition; values shown below)
0 = Clock locked, maximum accuracy
4 = Clock unlocked, accuracy
<
1 us
5 = Clock unlocked, accuracy
<
10 us
6 = Clock unlocked, accuracy
<
100 us
7 = Clock unlocked, accuracy
<
1 ms
8 = Clock unlocked, accuracy
<
10 ms
9 = Clock unlocked, accuracy
<
100 ms
A = Clock unlocked, accuracy
<
1 s
B = Clock unlocked, accuracy
<
10 s
F = Clock failure, time not reliable
10.3.7
Local / Daylight Saving Time Setup Commands
Set Daylight Saving/Summer Time Mode
Command:
1,mDT
1,mDT activates the Daylight Saving Mode, where m = 0 to 2, with 0 = OFF, 1 = ON, and 2 =
AUTO. When OFF this time adjust feature does not add the specified offset to local time display
and output. With m = 1 (ON), the Daylight Saving / Summertime feature is always on. With m =
2, the Daylight Saving / Summertime feature will automatically change at the specified dates and
times. To complete the Daylight Saving / Summer Time setup, you must also use the Set Daylight
Saving Auto Start and Stop commands that follow below.
Return Daylight Saving/Summer Time Settings
Command:
0DT