Section 2: Installation
Page 2-12
NetClock/GTP Instruction Manual
Where: 0 = No DST, always Standard Time
1 = North America
2 = United Kingdom
3 = Continental Europe
4 = China
5 = Australian 1
6 = Australian 2
Example: Set the Serial Comm 1 to respond with Data Format 02 whenever a T is
received. Set the bit rate at 9600 Baud and time reflecting UTC time
without DST corrections.
Type:
SM ON <ent
>
(Set Mode may already be enabled)
Response:
SET MODE ON
Type:
SER1 9600 02 T -00:00 0 <ent>
Response:
SERIAL PORT 1
BAUD RATE = 9600 FORMAT # = 02 REQUEST CHAR = T
TIME DIFF = -00:00 DST = 0
Example: Set the Remote Output to provide Format 00 at 9600 baud and time
reflecting Central Time with DST corrections.
Type:
SM ON <ent
>
(Set Mode may already be enabled)
Response:
SET MODE ON
Type:
REM1 9600 00 -06:00 1 <ent>
Response:
REMOTE PORT 1
BAUD RATE = 9600 FORMAT # = 00
TIME DIFF = -06:00 DST = 1
2.7 INITIAL
OPERATION
During initial operation, the GPS LOCK and TIME SYNC lamps are red. The initial clock
time is derived from the nonvolatile RAM/Timekeeping integrated circuit. The receiver
will now acquire and lock to GPS satellites currently in view of the antenna. If the
receiver is unable to acquire a satellite within 15 minutes a GPS Lock Alarm is asserted
causing an RS-232 alarm log entry.
The GPS LOCK lamp turns green after tracking at least one satellite for one minute.
The TIME SYNC lamp remains red until the receiver has acquired the complete system
almanac from at least one satellite. Typically, the entire process of acquiring satellites
and retrieving the almanac requires 20 minutes to accomplish. Once the GPS LOCK
and TIME SYNC lamps turn green the NetClock/GTP shall operate in accordance with
the specifications published in this manual.