Furuno TB-1 User manual

www.furuno.com
FURUNO
Field Time Sync Generator
TB-1
Operation Manual
(Document No. SE20-900-014-02)

TB-1
Operation Manual
SE20-900-014-02
IMPORTANT NOTICE
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.
Any information of this documentation shall not be disclosed to any third party without permission of the
publisher, FURUNO ELECTRIC CO., LTD.
In this product, FURUNO can ensure safe performance only the commands and the sentences which are
written in this document or are written in the document for this product. Please do not use the commands of the
others products, otherwise this product may have troubles and FURUNO may not support about the troubles.
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)
- Galileo(Europe)
- QZSS(Japan)
- SBAS(USA: WASS, Europe: EGNOS, Japan: MSAS)
Thus FURUNO is not liable for the degradation of the above systems so therefore FURUNO cannot g
uarantee specification based on their conditions. User is expected to be familiar with the System and
make full use of it with their own responsibility.
Android™ is a trademark of Google Inc.

TB-1
Operation Manual
SE20-900-014-02
Revision History
No.
Contents
Date
0
First Release
2020.10.02
1
correct download website in page 6
2020.12.11
2
change the contact section in page 13
2020.03.05

TB-1
Operation Manual
SE20-900-014-02
Contents
1Outline ······················································································································1
2Safety precautions······································································································1
3Main Unit ···················································································································2
3.1 Unit and Accessories ···································································································· 2
3.2 Part names and Functions····························································································· 2
3.2.1 Front Side ··············································································································2
3.2.2 Back side (Maintenance Board) ················································································3
4Getting started ···········································································································5
5Checking TB-1 via Android™ App ·················································································6
6Customization··········································································································10
7Troubleshooting ·······································································································12
8GNSS Antenna Installation························································································· 12
9Others····················································································································· 13
9.1 Manufacturer···············································································································13
9.2 Contact·······················································································································13
9.3 Warranty·····················································································································13
10 Specification ·········································································································14

TB-1
Operation Manual
SE20-900-014-02
1
1 Outline
TB-1 is an instrument that provides accurate frequency (10MHz) and time pulse (1PPS) based on GNSS
signals.
2 Safety precautions
・Please read carefully before use. Be sure to follow these instructions. After reading this manual, be sure to
keep it carefully.
・The precautions listed below are to prevent risk of harm to the user and others, as well as to prevent property
damage. Be sure to follow these instructions.
・The following classifications describe the extent of harm or damage in the case of improper handling.
This content indicates risk of death or serious injury to the user in
the case of improper handling.
This content indicates risk of injury to the user or damage to
physical property in the case of improper handling.
・Do not disassemble or modify the device. It has high-temperature and high-voltage parts in it, posing great
danger.
May cause performance degradation or malfunction.
・Do not short-circuit the connector or internal parts with any type of of metal.
May cause electric shock or malfunction.
・Do not let the apparatus get wet or place objects filled with liquids on the apparatus. Do not operate with
wet hands. May cause electric shock or malfunction.
Make sure that outdoor antenna connections are properly waterproofed.
・Do not operate the device in a malfunction or abnormal condition.
If there is smoke, unusual noise or smell, excessive heat, or output/display error, turn off the power
immediately and contact customer service. Otherwise there is a risk of fire or electric shock.
・Do not subject the device to vibration. May cause performance degradation or malfunction.
This is a precision instrument equipped with parts that may deteriorate in performance due to vibration or
impact.
・Do not carry the device by holding the connector or the cable connected. Do not apply excessive force to
those parts, as they are not designed to withstand the weight of the device.
The device may fall and cause injuries.
・Do not carry the device with cables connected. The cables may get caught on body or object and cause
the device to fall over, resulting in injuries.
・Do not mount a connector that does not match the shape to the device. May cause malfunction or damage.
Use an appropriate conversion adaptor when connecting cable with a different type connector.
・Do not use in extremely hot or cold locations.
Do not exceed the operating temperature of the device.
・Operate at an altitude of less than 4000m.
・This product is designed to be used in places such as office, laboratory or residence(pollution level 2).
・Keep enough space and creepage distance. The CE compliance may become invalid if not follow the
instruction.

TB-1
Operation Manual
SE20-900-014-02
2
3 Main Unit
3.1 Unit and Accessories
Check below accessories before use.
■
TB-1 Unit
・・・
1
■
GNSS Antenna
・・・
1
■
USB Cable
・TypeC –TypeC
・・・
1
・TypeC –TypeA
・・・
1
※
Power adapter is not included
3.2 Part names and Functions
3.2.1 Front Side
①②③
④⑤⑥⑦⑧
No.
Name
Display
Shape
Description
①
Power LED
Green
‐
Illuminates when the power is on.
②
Lock LED
Green
‐
Display device status. The light illuminates in approx.
5 minutes after system power-on and stable GNSS
reception.
③
ALARM LED
Red
‐
Illuminates when internal anomaly is detected.
④
POWER USB
POWER
USB
TypeC
Power supply connection only. Not available for data
communication.
⑤
DATA USB
DATA
USB
TypeC
USB jack for data communication (also available for
power supply.) It is designed to transfer data with an
Android device to keep record of the internal status.
⑥
GNSS ANT
GNSS
SMA
Connect GNSS antenna
⑦
10MHz Out
10MHz
SMA
Outputs 10Mhz
⑧
1PPS Out
PPS
SMA
Outputs 1PPS

TB-1
Operation Manual
SE20-900-014-02
3
3.2.2 Back side (Maintenance Board)
Contact us in case of using maintenance port on the back.
#1 #2 #3 #4 #5 #6 #7 #8
Connector: S08B-PASK-2 (JST)
■I/O Signal Description
#
Pin Name
Type
Description
1
VCC
Power Input
Main power supply input pin
2
GND
-
-
3
GND
-
-
4
TXD
232C output
Serial communication output pin
5
RXD
232C input
Serial communication input pin
6
GND
-
-
7
LOCK
Digital output
Lock signal output pin
Logic L :Unlock Logic H :Lock
8
ALM_N
Digital output
Alarm signal output pin
Logic L : Abnormal Logic H : Normal

TB-1
Operation Manual
SE20-900-014-02
4
■Power Supply
Items
Symbol
Min
Typ
Max
Unit
Notes
VCC supply voltage
VCC
4.75
5
5.25
V
-
VCC current consumption
(at start up)
PWU
-
-
4.5
W
-
VCC current consumption
(at stable state)
PST
-
2.5
-
W
-
■232C Interface Signal
Items
Symbol
Min
Typ
Max
Unit
Notes
Low-Level input voltage
VRXD_IL
0.6
1.2
-
V
-
High-Level input voltage
VRXD_IH
-
1.5
2.4
V
-
Low-Level output voltage
VTXD_OL
-5
-5.4
-
V
-
High-Level output voltage
VTXD_OH
5
5.4
-
V
-
RXD input pull-down resistor
RRXD_PD
3
5
7
kΩ
-
■Interface Signal
Items
Symbol
Min
Typ
Max
Unit
Notes
Low-Level output voltage
VOL
-
-
0.44
V
lOL = 24mA
High-Level output voltage
VOH
3.8
5
-
V
IOH = -24mA

TB-1
Operation Manual
SE20-900-014-02
5
4 Getting started
1. Configuring the antenna
Connect the accessory antenna to the GNSS ANT of TB-1 unit.
Locate the antenna in an open sky condition. (Refer to Chapter 8. GNSS Antenna Installation)
2. Connecting to the power
Connect the included USB cable (TypeC connector) to the Power USB jack of TB-1, and TypeA
connector to a USB power adapter.
※Power supply: DC5V 2A
※Power LED will illuminate.
3. Wait until Lock LED illuminates green.
In about 5 minutes after power-on, Lock LED(green) will illuminate and 10MHz & 1PPS becomes
available to connect with the corresponding devices.
Connect 10MHz and 1PPS to sync
corresponding devices

TB-1
Operation Manual
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6
5 Checking TB-1 via Android™ App
TB-1 can communicate with an Android device. Check the status using FURUNO TB-1 App.
Download FURUNO TB-1 App (TB-1 App for AndroidTM) and start.
FURUNO TB-1 App (TB-1 App for AndroidTM) can be downloaded from Furuno website.
https://www.furuno.com/en/gnss/datadownload/
Connect DATA USB using TypeC-TypeC USB cable with Android device.

TB-1
Operation Manual
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7
Main Screen
Current time
(displayed in the time zone of Android device)
Current location
Status
↓
↓
↓
Status is indicated in 4 levels※. Only when all lights are
activated, Lock LED illuminates on, indicating Locked
status.
※“Measure atomic oscillator” mode requires 5 indicated
levels
※
Output 1PPS: Displays the difference between 1 PPS
output and UTC.
Output 10MHz: Displays the frequency of 10 MHz output.
ALARM: Displays the alarm status, which links with the
ALARM LED on TB-1.

TB-1
Operation Manual
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8
MAP Screen
Current location
Click in the lower left, the current location will be
displayed in the center.
Current speed
※A connection to the network is required to show the MAP
screen.

TB-1
Operation Manual
SE20-900-014-02
9
GNSS Screen
Status of GNSS satellite signal reception
Sky plot of GNSS satellite position.
Mask settings (refer to Chapter 6 Customization)
Displays the satellite number (PRN) and corresponding
signal level (C/N0) of the GNSS satellite.
PRN in red indicates satellite numbers not used for
positioning.

TB-1
Operation Manual
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10
6 Customization
Mask Settings
Customize GNSS satellite mask from “Mask settings” menu.
If there is a tall building at a specific elevation or azimuth
angle, the performance of TB-1 can be improved by
disabling the use of those satellites for positioning.
Select “Read from TB-1” to show the current settings.
Choose a specific azimuth angle by tracing the perimeter of
the sky plot, and adjust the elevation angle by drawing the
bar next to the sky plot.
Click ⊕to add new mask, or ⊗to delete current mask.
Select “Send to TB-1” to apply the new settings.
Add/remove the mask settings from “Favorites”.
※The mask settings will be reset when power-off condition
occurs.
※Add/remove the mask settings from “Favorites” needs
internal storage access onAndroid device.

TB-1
Operation Manual
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11
Other Settings
Uncheck “Use accessory antenna” checkbox when
other specific antennas are preferred.
If optional antenna is used set the delay value
according to the specific antenna and cable
configuration. (NOTE: accessory antenna and cable
delay value is 57ns)
Check “Measure atomic oscillator” checkbox to provide
more precise frequency or time signals.
Above checkbox settings must be saved to TB-1.
Select “SAVE SETTING TO TB-1” to save all.
※The delay value and “Measure atomic oscillator”
mode settings will not be reset when power-off.
This Android app can update firmware for TB-1. Check
“No update confirmation” if TB-1 does not need
firmware update.

TB-1
Operation Manual
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12
7 Troubleshooting
Problem
Solution
Does not operate.
Check Power LED. (Check the voltage and current of the power supply.)
Does not Lock.
It takes approximately 5 minutes after power-on in an open sky condition and
additional 5 minutes when using “Measure atomic oscillator” mode.
Check the antenna location and connections. Details refer to Chapter 8. GNSS
Antenna Installation.
Cannot output 10MHz or
1PPS signal to the
corresponding devices.
Check wiring of connecting cables.
Check the impedance/voltage level of 10MHz・1PPS signal.
ARARM LED is displayed.
In case 10MHz or 1PPS is not available, it could be a malfunction, contact us for
assistance.
In case 10MHz or 1PPS output with Lock status, the device could be nearing
the end of life, please replace with a new one.
Failed to connect to
AndroidApp.
Check ifAndroidApp is installed and run properly.
Check if DATA USB properly connected withAndroid device..
8 GNSS Antenna Installation
In order to improve the reception of signals from GNSS satellites, GNSS antennas should be installed in an open
sky condition. Open sky refers to an outdoor environment with a clear sky view and without obstacles along the
entire periphery. GNSS signals may be reflected by buildings, trees, ground, etc., and reach the GNSS antenna
through different paths, this is called multipath. It degrades the accuracy of GNSS poisoning, as well as the
accuracy of time and frequency output from TB-1. It is therefore necessary to install the GNSS antenna in an
open sky environment whenever possible.
In consideration of the multipath effect that can cause long wait times until Lock status, it is recommended to
install the GNSS antenna in a place with a clear view. In particular when using “Measure atomic
oscillator”mode which requires accurate GNSS positioning, it is strongly recommended that utmost care is
exercised when selecting installation environment of the GNSS antenna.
In case of difficulty to install the GNSS antenna in an open sky environment (ex. indoor environment), it is
better to install outside the window than near the window, particularly metalized glass windows. As viewed
from the GNSS antenna, the signals from the direction of the building may have been affected by multipath, so
it is recommended masking this heading (Mask Settings) to improve the accuracy of time and frequency output
from TB-1.
Since the signals from GNSS satellite are extremely weak, RF noise may interfere via GNSS antenna and
adversely affect the GNSS signal reception of TB-1. Avoid installing GNSS antenna near equipment emitting
RF noise.

TB-1
Operation Manual
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13
9 Others
9.1 Manufacturer
Furuno Electric Co. Ltd.
9-52 Ashihara-cho, Nishinomiya, Hyogo
9.2 Contact
Furuno Electric Co., Ltd.
System Products Division, Sales Department 1
Inquiry Form Link:
https://www.furuno.co.jp/en/contact/cnt_gps_e01.html
9.3 Warranty
The warranty term of this product is one year after delivery.

TB-1
Operation Manual
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14
10 Specification
Items
Specification
Power Supply
Port
POWER USB / DATA USB
Power
DC 5V 2A
Output 10MHz
Frequency
10MHz
Power
6.5±1.5dBm Sine Wave
Impedance
50Ω
ADEV
< 5E-11(@τ=1s)
Coherent to output 1PPS
Yes
Output 1PPS
Accuracy
< 40ns
Stability
SDEV <4.5ns
In conformity with PRTC-A / PRTC-B
Edge
UP
Impedance
50Ω
Voltage
3.3V(LVCMOS)
Serial I/F
Port
DATA USB
USB IC
FTDI FT230XS-U
Speed
38400 bps
Start / Data / Stop / Parity
1bit / 8bits / 1bit / None
Character Codes
NMEA-0183 Ver.4.10 data based ASCII code
Settings
Set via Android OS
LED
LOCK /ALARM / POWER
GNSS Reception
Capability
GPS L1C/A, GLONASS L1OF, Galileo E1B/E1C,
QZSS L1C/A, QZSS L1S, SBAS L1C/A
Antenna DC
superimposed
3.3V
Time to Lock
< 5min
Size
141.0mm × 36.0mm × 60.0mm
(Excluding the protruding parts)
Operating condition
(Main Unit)
Operating Temperature
-40℃～+85℃
Operating Humidity
Max 85%