FALCOM JP7-T Series Hardware Description page 46

GPS-RECEIVER JP7-T
can use port B (second serial port) to feed in DGPS correction
data. Pull-up (100 kΩ) unused SDI inputs.
Active Antenna Bias Voltage: The output voltage at the antenna cable
-
can be used to power the bias voltage of the antenna, provided
can make sure that the antenna runs down to 2.7 V bias voltage
and the current does not exceed 20 mA.
Backup Battery: In order to allow the GPS receiver to perform
-
internally the warm and hot start it is advisable to connect the
V_BAT pin to an external backup battery. For more
information on cold, warm, and hot-start scenarios, please refer
to the
on pin VCC the real-time clock and backed-up SRAM are
continually supplied through V_BAT. The voltage at this pin
has to be +3 V DC ±5%. If you do not use a backup battery,
connect this pin to GND or leave it open. Do not use a super
cap for the battery backup supply (recommended by SiRF).
The quickest way to get first results with the JP7-T is to use the JP7-T
Evaluation board together with the program SiRFdemo.
:
Figure 17
The Evaluation board contains:
Evaluation Box
-
JP7-T sample with soldered antenna cable.
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power supply (AC/DC adapter, Type FW738/05, Output 5VDC 1.3 A)
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active GPS antenna (FAL-ANT-3)
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RS232 level shifter
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RS232 cable to your computer.
-
The Evaluation board with contained components are not included in the
delivery package. In order to have one the users of JP7-T family have to
purchase it.
This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission.
Section 6.3 " Start-Up". In case of a power interruption
JP7-T Evaluation board
VERSION 1.02
Page 46