Arbiter Systems 1200B, Operation Manual

Page: 113 / 218

11.2 Standard Command Set 95
EEPROM Status
Command: SE
Returns the EEPROM status.
Response: T=t CE=ee
< CR >< LF >
Where: t = 0, No Timeout Error; t = 1, Timeout Error
ee = Number of corrected errors in reading EEPROM data
< CR > = Carriage Return = Hex 0D
< LF > = Line Feed = Hex 0A
Receiver Status
Command: SR
Returns the current receiver status.
Response: V=vv S=ss T=tt P=Off
< CR >< LF >
Where: vv = number of satellites, visible to the antenna, per almanac
ss = relative signal strength (range: 0 to 100, nominal value = 45)
t = number of satellites being actively tracked
P = Off, no time dilution of precision (TDOP) calculation. 1.0 – 99.0, when there is
a TDOP calculation. Must have 3 visible satellites for calculation.
< CR > = Carriage Return = Hex 0D
< LF > = Line Feed = Hex 0A
System Status
Command: SS
Returns the instrument operation status in three parts: System Status (S), Current Fault (F),
Holdover/GNSS (HO GNSS) Fault. See Tables 11.1, 11.2, and 11.3 for bit assignments of clock conditions.
Response: S=aa.bb F=cccc.dddd HO GNSS=ee.ff
< CR >< LF >
Where: aa = current system status
bb = previous system status
cccc = current system status
dddd = previous system status
ee = current system status
ff = previous system status
< CR > = Carriage Return = Hex 0D
< LF > = Line Feed = Hex 0A
Time Quality
Command: TQ
Returns character corresponding to estimated worst-case time quality per IEEE Standard C37.118.1. See
Table 11.4 for values.
Response: h
< CR >< LF >
h Time Error h Time Error
0 Locked, max. Accuracy 7 Unlocked, accuracy < 1 ms
1 Unlocked, accuracy < 1 ns 8 Unlocked, accuracy < 10 ms
2 Unlocked, accuracy < 10 ns 9 Unlocked, accuracy < 100 ms
3 Unlocked, accuracy < 100 ns A Unlocked, accuracy < 1 s
4 Unlocked, accuracy < 1
µ
s B Unlocked, accuracy < 10 s
5 Unlocked, accuracy < 10
µ
s F Clock failure
6 Unlocked, accuracy < 100
µ
s – –
Table 11.4: Unlocked Time Quality