Holux GR-87 Specification - 4. Ordering Information
GPS
Product series
With HOLUX, You never lose the way!
HOLUX Technology, Inc.
1F, No.30, R&D Road, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park)
TEL: 886-3-6687000 FAX:886-3-6687111 E-mail:info@holux.com.tw Website:www.holux.com.tw
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3.3.1 VCC_5V
This is the main DC power supply for a +3.3~ 5.5 V engine board.
3.3.2 TXA
This is the main transmitting channel and is used to output navigation and
measurement data for user written software.
3.3.3 RXA
This is the main receiving channel and is used to receive software
commands to the board from user written software.
3.3.4 RXB
This is the auxiliary receiving channel and is used to input differential
corrections to the board to enable DGPS navigation.
3.3.5 GND
GND provides the ground for the board. Connect all grounds.
3.3.6 TIMEMARK (default)/ RESET (option)
This pin default is provides 1 pulse per second output from the GR-87
engine board, which is synchronized to within 1 microsecond of GPS time. The
output is a CMOS 3V positive level signal. Only upon a situation of tracking or
navigating will output once per second. This is not available in Trickle-Power
mode.
The secondary option function is provides an active-low reset input to the
engine board. It causes the engine board to reset and start searching for
satellites. (This second function setting need contact factory).
4. Ordering Information
Model No.
Output Level
(CMOS 3V or
RS-232)
RF interface
output voltage (V)
Back-up battery
(Rechargeable
Lithium)
Power
Saving
RF
Connector
Type
GR-87-T0A CMOS
3V
2.8
Y
Y
MMCX(180∘)
GR-87-T0B CMOS
3V
2.8
Y
Y
MMCX(90∘)
GR-87-T0C CMOS
3V VCC_IN
Y
Y
MMCX(180∘)
GR-87-T0D CMOS
3V VCC_IN
Y
Y
MMCX(90∘)