14 G12 OEM Board & Sensor Reference Manual
See Chapter 4, Command/Response Formats, for more information on the G12 commands.
A lower-cost version of the G12, called G12-L, is also available. The G12-L
supports lower maximum update rates for position (5 Hz) and raw data (2 Hz),
and uses Ashtech’s edge correlator for multipath mitigation instead of the strobe
correlation technology in the standard G12. If higher update rates are required, or
if a high-multipath environment requires better multipath mitigation, the G12-L
can be upgraded with any of the features available for the standard G12.
There are two G12 evaluation kits available for purchase:
• G12 Sensor Evaluation Kit
• G12 OEM Board Evaluation Kit.
Figure 1.4, Figure 1.5, and Figure 1.6 on the pages that follow illustrate the
contents of the two evaluation kits.
The G12 Sensor Evaluation Kit contains a G12 receiver housed in an extruded
aluminum enclosure, an antenna, hardware accessories for power and
interfacing, and software to allow you to communicate with the receiver and
monitor its performance.
WARNING!
Take the following precautions to avoid damaging your G12 OEM Board:
1. Turn off power before connecting or disconnecting I/O-power cable and J301.
2. Ensure that when connecting the I/O-power cable to connector J301, pin 1 is cor-
rectly oriented per Figure 1.1.
3. Connect pin 15 (BATT_IN) to ground if it is not being used. Leave pin 17
(MAN_RES) open if it is not being used.
4. Isolate the center pin on the antenna connector from DC ground. The DC block
used between the center pin and DC ground should have the following characteris-
tics:
• 1.15 maximum VSWR @ 1575 Mhz
• 0.2 db maximum insertion loss
• 5 VDC maximum applied voltage
5. Connect the RAM back-up battery to the appropriate pins on J301 and set the
SAV parameter to Y.
G12RevD.book Page 14 Tuesday, April 2, 2002 4:33 PM
To Next Page
Loading...