FURUNO GNSS Receiver
Evaluation kit
Model: VN-87x/ VN-88x
Startup Manual
(Document No. SE19-710-002-00)
www.furuno.com
VN-87x/VN-88x
Startup Manual
SE19-710-002-00
IMPORTANT NOTICE
This product is intended to evaluate the functions and the performance of our GNSS receiver in an
environment in which the temperature (25°C) and vibration (0 m/s2). Also, any reliability test has not been
conducted. Therefore, the functions and the performance are not guaranteed at user’s operating condition or
environment. In that case, please guarantee the functions and the performance of this product under user’s
own responsibility.
No part of this manual may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, for any purpose without the express written permission of
the publisher, FURUNO ELECTRIC CO., LTD.
FURUNO ELECTRIC CO., LTD. All rights reserved.
FURUNO ELECTRIC CO., LTD. reserves the right to make changes to its products and specifications without
notice.
All brand and product names are registered trademarks, trademarks or service marks of their respective
holders.
The following satellite systems are operated and controlled by the authorities of each government.
GPS (USA)
GLONASS (Russia)
Galileo (Europe)
QZSS (Japan)
SBAS (USA: WAAS, Europe: EGNOS, Japan: MSAS)
FURUNO is not liable for any degradation while using these satellite systems. FURUNO cannot guarantee
specifications if any of these systems experience degradation. Based on these conditions the user is expected
to be familiar with these systems and is fully responsible for their use.
VN-87x/VN-88x
Startup Manual
SE19-710-002-00
Revision History
Version
0
Contents Change
Initial Release
Date
2019.04.09
VN-87x/VN-88x
Startup Manual
SE19-710-002-00
Table of contents
1
2
3
4
Outline ······················································································································ 1
Component List ·········································································································· 1
Overview ··················································································································· 2
CAR I/F ······················································································································ 3
4.1
CAR I/F ························································································································ 3
4.2
Speed Pulse ················································································································· 4
4.3
Reverse Signal ············································································································· 4
5 How to Function ········································································································· 5
6 Communication Setting ······························································································· 5
VN-87x/VN-88x
Startup Manual
SE19-710-002-00
1 Outline
The document describes the VN-87x (VN-870, VN-871 and VN-872)(*1) and VN-88x (VN-882)(*1) startup
manual.
(*1) VN-87x and VN-88x are the evaluation kits built in FURUNO GNSS module (GN-87, GV-87, GT-87 and
GT-88). The differences of these evaluation kits are as follow table.
Type
Module
Note
VN-870 GN-87 (GPS, GLONASS and Galileo Multi GNSS Module)
GV-87 (GPS & GLONASS Multi GNSS + Dead Reckoning Module) Built in gyro sensor and
VN-871
accelerometer
VN-872 GT-87 (GPS & GLONASS Multi GNSS Timing Module)
VN-882 GT-88 (GPS, GLONASS and Galileo Multi GNSS Timing Module)
2 Component List
The component lists of these evaluation kits are as follows.
Type
VN-870
VN-871
VN-872
VN-882
Antenna
USB Cable
Multi GNSS antenna
L1 band, G1 band
Attached
(*2) CD-ROM is as follows.
- Communication software
- Documentations
1
CAR I/F Cable
Attached
-
CD-ROM(*2)
Attached
VN-87x/VN-88x
Startup Manual
SE19-710-002-00
3 Overview
(4)
(3)
(2)
(1)
(6)
(5)
2
(7)
VN-87x/VN-88x
Startup Manual
SE19-710-002-00
(1)
(2)
(3)
(4)
Name
1PPS
CLK(*3)
ANT
CAR I/F(*4)(*5)
Type
SMA-J
SMA-J
SMA-J
Molex 53254-0370 3 pin
(5)
RS-232C (*6)
D-sub 9 pin
(6)
USB (*6)
Type B
(7) ON OFF
Slide switch
(*3) VN-872 and VN-882 can only output clock.
(*4) VN-871 can only use this connector.
(*5) See the chapter 4 for the details.
(*6) Communicate from either RS-232C or USB
Description
PPS is output from the connector.
Clock is output from the connector.
Use the attached antenna.
This connector is for inputting speed pulse and
reverse signal
Matching Housing: Molex 51065-0300 3 pin
Matching Pin contact: 50212-8000
RS-232C Communication
Supply power from USB
USB port for power supply and communication
between the evaluation kit and PC of customer side
Main power ON/OFF switch
4 CAR I/F
This chapter describes about the pin assignment of CAR I/F connector and the electrical specifications of the
speed pulse and the reverse signal. When the signals are distributed and used, it is necessary to be careful
since a signal level decrease may occur by the influence of other circuits.
4.1
CAR I/F
#1
Figure 4-1 CAR I/F
Pin #
1
Name
SPEED
I/O
I
2
BACK
I
3
GND
-
Table 4-1 Pin assignment of CAR I/F port
Description
Speed pulse
Reverse signal input
L:Forward
H:Reverse
Ground
3
Note
VN-87x/VN-88x
Startup Manual
SE19-710-002-00
4.2
Speed Pulse
When using the vehicle speed pulse, input the vehicle speed pulse suitable for the specifications in Table 4.2.
When distributing signals and use them, be careful to use because signal levels may drop due to the influence
of other circuits.
Item
High level amplitude
Low level amplitude
Frequency
Duty cycle
Table 4-2 Electric characteristics of Speed pulse
Symbol
Unit
Min
Typ
Max
VH
V
4
13.5
VL
V
-0.3
1
f
Hz
DC
2000
%
25
50
75
Condition
Refer to Figure 4-2
Figure 4-2 Waveform of Speed pulse
4.3
Reverse Signal
When using a reverse signal, please input a reverse signal suitable for the contents described in Table 4.3..
The reverse signal is a signal that indicates the direction of forward and reverse movement of the vehicle. It is
backward when high and forward when low.
Table 4-3 DC characteristics of Forward/ Reverse signal
Item
Symbol
Unit
Min
Typ
Max
High level amplitude
VbH
V
4
13.5
Low level amplitude
VbL
V
-0.3
1
4
Condition
VN-87x/VN-88x
Startup Manual
SE19-710-002-00
5 How to Function
①
②
③
④
⑤
⑥
⑦
⑧
Install the GNSS Conductor into a PC.
Connect the attached antenna to the RF Connector.
Switch the evaluation kit off.
Connect the evaluation kit and the PC via USB-cable.
Confirm the connection status between the evaluation kit and PC from the device manager.
Install the device driver, if "Found New Hardware Wizard" appears.
Switch the evaluation kit on.
Operate the evaluation kit with the communication software (GNSS Conductor).
6 Communication Setting
The default communication setting is as follows.
Baud rate
COM Port
Data length
Parity
Stop bit
9600 [bps] (VN-870)
115200 [bps] (VN-871)
38400 [bps] (VN-872/882)
COM port number connecting the evaluation kit
8 bit
None
1 bit
5
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