Arbiter Systems 1088A, Operation Manual

Page: 104 / 279

84 Serial Communication and Command Set
Return Latitude
Command: LA
LA returns the current antenna latitude. In Position Hold mode, LA returns the current position-
hold latitude setting. In Fix mode, LA returns the most recent computed latitude value (calculated
each second).
Response: Ndd:mm:ss.sss
C
Format: N = North (S for South)
dd = degrees
mm = minutes
ss.sss = seconds (fractional seconds)
Return Longitude
Command: LO
LO returns the current antenna longitude. In Position Hold mode, LO returns the current position-
hold longitude setting. In Fix mode, LO returns the most recent computed longitude value (calcu-
lated each second).
Response: Wddd:mm:ss.sss
C
Format: W = West (E for East)
ddd = degrees
mm = minutes
ss.sss = seconds (fractional seconds)
Position–Hold – OFF
Command: PH0
PH0 deactivates the Position–Hold timing mode. The receiver resumes computing time and position
solutions approximately each second. This is referred to as the Fix mode.
Response:
C
Position–Hold – ON
Command: PH1
PH1 activates the Position–Hold timing mode. In this mode, the receiver position is held fixed
and each channel is used to compute a timing solution. These solutions are averaged together,
resulting in reduced timing noise due to to Selective Availability and RF channel noise. To operate
properly, the position used by the receiver must be fairly accurate. Due to the risk that previously
stored position data may be inaccurate, exercise caution when activating the Position–Hold mode
without either performing an Auto Survey or getting the position directly. Failure to observe these
precautions may result in serious timing errors.
Response:
C