GPS7 GPS Synchronization and Timecode modu le
ACQUIRE POS ITI
ON. Press the ENTER button to erase the saved position, and
then acquire and save a new averaged position. Note that the signal quality might
indicate low or no signal during this process.
NOTE. The module must make 60, 1 second GPS readings with at least four
satellites to acquire the position. How long this takes depends on various
conditions. If there are less than four satellites, a reading cannot be taken.
GPS CONSTELLATION. This menu selection appears only for GPS7 modules
with a GPS/GLONASS receiver that are installed in a TG8000 with firmware
version 1
.6 or later.
Use the left (◄)orright(►) arrow button to select GPS Only, GLONASS Only,
or GPS & G
LONASS.
NOTE. After you configure the GPS constellation, it is strongly recommended that
you save the module settings to the Power On Default preset. The Power On
Default preset saves the configuration p arameters in both the TG8000 mainframe
and the installed modules, which helps the instrument power up faster in the event
of a power outage or interruption. (See page 3-112, Save the module settings as
the Po
wer On Default preset.)
Earlier versions of the GPS7 module included a receiver that could use only GPS
sign
als. Later versions of the module include a receiver that can use GPS and/or
GLONASS signals. (See page 3-102, How to determine which GPS receiver is
installed in your GPS7 module.)
SIGNAL WARNING. This function provides a warning that the antenna signal
has degraded. Set this level below the normal range experienced as a function
o
f time of day, weather, or other variables. To configure the output warning, see
the GPO submenu. (See page 3-151, GPS7 module GPO submenu.) Use the left
(◄)orright(►) arrow button to select the FOM (quality of the GPS/GLONASS
signal) value that will trigger warning indicators. (See page 3-105, Figures of
Merit (FOM).)
3–132 TG8000 Multiformat Test Signal Generator User Manual
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