Tallysman TW5340 User manual

TW5340
Integrated GPS/ GLONASS
Receiver/Antenna
User Manual
Visit us on the web:
www.tallysman.com
Document # 61-0009-0

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Document Amendment Record
Revision
Date
Comments
Rev 1_0
7 Nov 2014
Initial release
Rev 1_1
11 Nov 2014
Minor edits
Rev 1_2
10 Dec 2014
Edit of wake up pin
Rev 1_3
4 Mar 2015
TW5340 Rev 3 Standby Mode support
Rev 1.4
6 May 2015
Correction to configurator and clarification regarding
10 Hz operation
Copyright
Copyright 2014 2015 Tallysman Wireless Inc. All Rights Reserved.
This document and the subject matter herein are proprietary items to which
Tallysman Wireless Inc. retains an exclusive right to reproduction, manufacture and
sale. This document is submitted in confidence, for the use of the recipient alone, or
in conjunction with Tallysman Wireless Inc. and its licensees, and for no other
purpose whatsoever unless permission for further disclosure is expressly granted in
writing. Information in this document is subject to change without notice.
Tallysman Wireless Inc.
106 Schneider Road, Unit 3
Ottawa ON K2K 1Y2 Canada
Tel: [phone]
Fax: [phone]

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Table of Contents
1Introduction ................................................................................................................ 5
2Variants ....................................................................................................................... 7
2.1 Ordering Information ........................................................................................... 7
3GNSS Systems.............................................................................................................. 7
3.1 GPS ....................................................................................................................... 7
3.2 GLONASS .............................................................................................................. 7
4NMEA Packet Format.................................................................................................. 8
5Software Utilities ........................................................................................................ 8
5.1 Open Source GPS Software Utilities..................................................................... 8
6Hardware Interface..................................................................................................... 9
6.1 TW5340 Installation ........................................................................................... 10
6.2 Testing ................................................................................................................ 10
Test Adaptor Pin outs ............................................................................................... 11
NMEA Output test..................................................................................................... 11
Satellite Output Test ................................................................................................. 12
6.3 Power ................................................................................................................. 12
6.4 1PPS.................................................................................................................... 12
Cable Delays:............................................................................................................. 14
Fix Quality (1PPS Qualification)/Standby.................................................................. 14
6.5 Wake Up Input ................................................................................................... 15
7Operating Modes ...................................................................................................... 15
7.1 Navigation Mode................................................................................................ 15
7.2 Standby Mode .................................................................................................... 16
Initialize GPS time ..................................................................................................... 16
7.3 Low Power Mode ............................................................................................... 17
8Satellite Based Augmentation System (SBAS) .......................................................... 18
9TW5340 Configuration.............................................................................................. 19
9.1 GENERAL............................................................................................................. 19
Setting new default parameters ............................................................................... 19

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Loading new Firmware.............................................................................................. 20
9.2 INTERFACE TAB................................................................................................... 21
9.3 GENERAL TAB ..................................................................................................... 21
9.4 MESSAGES TAB................................................................................................... 23
9.5 CONSTELLATIONS ............................................................................................... 27
9.6 TRACKING ........................................................................................................... 28
9.7 1 PPS TAB............................................................................................................ 29
9.8 STANDBY TAB ..................................................................................................... 31
10 NMEA Message Reference........................................................................................ 32
RMC........................................................................................................................... 32
GGA ........................................................................................................................... 33
GSA............................................................................................................................ 34
GSV............................................................................................................................ 35
VTG............................................................................................................................ 36
GLL............................................................................................................................. 36
GNGNS ...................................................................................................................... 37
ZDA............................................................................................................................ 38
Usage......................................................................................................................... 38
WAAS ........................................................................................................................ 39

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1Introduction
The TW5340 GNSS receiver/antenna incorporates the ST STA8088 state of the art
receiver which provides 32 high sensitivity tracking channels which can be assigned
to acquire and track GPS and GLONASS signals simultaneously. The TW5340 is
designed for use in professional grade applications such as precision timing, network
synchronization, low current battery and vehicle tracking applications.
The TW5340 family of GNSS receiver/antennas employs Tallysman’s Accutenna™ dual
feed antenna patch technology which greatly improves rejection of multi-path signals
across the whole GNSS band, resulting in much higher precision than single feed
antennas which are typically tuned to a single GNSS frequency.
The TW5340 supports ST Microelectronics Autonomous A-GPS which accelerates GPS
positioning by predicting satellite ephemeris data based on previous observations, this
results in extremely fast Time-To-First- Fix.
The TW5340 supports 3 modes of operation; Navigation, Standby and Low Current
(expert mode parameters only). A hardware interface is provided for external
application to control the Standby mode, this is especially useful in applications that
require low current drain.
The TW5340 outputs standard NMEA 0183 output with navigation updates rates up to
10Hz are supported. Three (3) messages lists can be output each with different output
rates.
The TW5340 is available with RS232, and CMOS interfaces and input voltage options of
3,3V, 5.0V and 12V.
A standard one pulse-per-second 1PPS output is available as a single ended output or as
a differential output at RS422 levels. The 1PPS can be configured to be synchronized to
UTC, GPS or GLONASS reference time.
Tallysman Windows™based TW5340 Configurator application provides for simple
configuration of TW5340 parameters such as tracking, Standby mode operation, 1 PPS
timing, constellations, SBAS etc.

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Figure 1 TW5340
The TW5340 is housed in an industrial grade weatherproof IP67 enclosure for
19mm diameter (¾”) thru-hole mount or mast mount installations. It is available
with low profile radome for use in tracking applications and with a conical radome
for timing applications.
Figure 2 TW5340
Features
Standalone Integrated GPS/GLONASS Receiver/Antenna
32 channel simultaneous operation
High performance tracking (-162dBm)
Fast time to first fix (35mS)
Accutenna –Dual feed antenna ( high multipath rejection)
SBAS Capable

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Low noise LNA and SAW band-pass filter
NMEA 0183 output; up to 3 lists
Differential 1PPS output
1PPS Qualification
Configuration information saved across power cycles
Waterproof enclosure (IP67)
Standby low current mode
RoHS compliant
2Variants
The TW534X is offered in the following variants:
PRODUCT
PWR
GND
SIGNALS
TW5340 (RS232)
3.3V,5V,12V
☑
TX (RS232)
RX (RS232)
1PPS _ A
(RS422)
1PPS_B
RS422
Fix Qual
/Standby
Wake Up
TW5340 (CMOS)
3.3V, 5V
☑
TX (CMOS)
RX (CMOS)
1PPS _ A
(RS422)
1PPS_B
RS422
Fix Qual
/Standby
Wake up
Table 1
2.1 Ordering Information
Part Numbering:
33-5340-X-YY GPS/GLONASS Smart Antenna
33-5341-X-YY Non-magnetic, GPS/GLONASS Smart Antenna
27-0045-1 TW5340 Test Adaptor
Where X= interface/voltage (0= RS232 12V; 1 = RS232 5V; 2 = CMOS 5V, 3 = CMOS, 3.3V,
4 = N/A, 5 = RS232 3.3V), YY= Radome (00= grey conical, 10=grey low profile, 01=white
conical, 11=white low profile).
3GNSS Systems
Tallysman TW5340 family of GNSS Receiver/Antennas are multi-GNSS receivers that
receive and track GPS, and GLONASS, signals simultaneously.
3.1 GPS
The US Global Position System (GPS) uses L1C/A signals at 1575.42 MHz to determine
position.
3.2 GLONASS
The Russian GLONASS satellite system is an alternative system to the US-based Global
Positioning System (GPS).

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4NMEA Packet Format
The TW5340 serial interface is based on the NMEA-0183 protocol standard.
The NMEA -0183 protocol starts with a “$” character followed by a NMEA Talker ID.
“GP” indicates Talker ID for the GPS constellation
“GL” indicates Talker ID the GLONASS constellation
“GN” indicates Talker ID for all constellations
5Software Utilities
5.1 Open Source GPS Software Utilities
The following open source GPS utility can be used to display the GPS and GLONASS GGA
and GSV messages with Talker ID’s GP and GL.
http://www.visualgps.net/VisualGPSView/
Note: “GN”Talker ID’s are not currently supported by this application.
This VisualGPS application can log data which can subsequently be imported into the
following data conversion application for easy display tracking data on Goggle maps:
http://www.gpsbabel.org/

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6Hardware Interface
The TW5340 is provided with a 5 m cable terminated in a RJ45 connector.
Figure 3
Wire Color
Signal
Comments
Pin #
Brown
Power
12V, 5V or 3.3V depending on model
8
Brown/White
Gnd
0V
7
Blue/White
RX into the TW5340
RS232 level (+/-6V)
CMOS 3.3V
5
Orange
TX out of the TW5340
RS232 level (+/-6.6V)
CMOS 3.3V
6
Green/White
Differential 1PPS output
1PPS_B
(0 to 2.0V levels).
1
Green
Differential 1PPS output
1PPS_A
(0 to 2.0V levels).
2
Orange/White
Wake up Input
Wake Up -input Low
‘”not supported on Rev 1_0 release”
3
Blue
Fix Quality (1PPS Qualification)
/Standby status
Continuous mode (0 to 3.3V)
4
Table 2

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Note 1 :
TW5340 Hardware has been changed on Rev 3 to provide better noise immunity of the
1PPS outputs. The following pin changes were made:
1PPS B was pin 3 & is now pin 1
1PPS A was pin 4 & is now pin 2
Wake up input was pin 1 & is now 3
Fix Quality/Standby status was pin 2 & is now pin 4
Note 2:
There is no change in the Test Adaptor cable 27-0045-0
6.1 TW5340 Installation
For best results the TW5340 GPS Receiver/Antenna should installed with a clear view of
the sky. The GPS Receiver/Antenna will obtain a 3D fix GPS fix with a minimum of 4
satellites.
6.2 Testing
Tallysman TW5340 DB9 Test adaptor (part # 27-0045-1) connects to the RJ45 connector
on the TW5430 and provides a DB 9 COM port connection to a PC for testing purposes.
Figure 4 shows the test system set-up, connect the adaptor RED wire to the positive
supply and the Black wire to Gnd.
If the TW5340 outputs at RS232 levels the Test Adaptor can be plugged directly into the
PC Com Port, if the TW5340 outputs at CMOS levels a CMOS to RS232 converter will be
required between the Test Adaptor and the PC COM port.
Baud Rate
The default output from the TW5340 is 5 digit resolution GGA, GSV and Usage messages
at 115,200 baud. See section 10 for message format information.

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Figure 4
Test Adaptor Pin outs
TW5430
DB9 Test Adaptor (27-0045-1)
Power (Pin 8 Brown)
Gnd (Pin 7 Brown/White)
Pin 5 Gnd
TX out (Pin 6 Orange)
Pin 2 RX into PC
RX in (Pin 5 Blue/White)
Pin 3 TX out of PC
Table 3
NMEA Output test
Run the VisualGPS application (see section 5.1), select the NMEA tab to display message
output.
Set COM Port: Select Tools/Connect to GPS
Figure 5

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Satellite Output Test
To display GPS/GLONASS satellite outputs the TW5340 must be configured to output a
GSV and GGA messages (default configuration). Run the VisualGPS application (see
section 5.1), select the Front Panel Status tab to display:
Figure 6
To read and write the TW5340 configuration parameters the same hardware test
configuration is can be used while running the Tallysman Windows based Configurator
application on the PC. See section 9 for configuration details.
The SBAS satellite is indicated by its NMEA ID and not the PRN #. See Table 5
for details.
6.3 Power
The TW5340 operates from 3.3V, 5V and 6to 16 volts. Overvoltage and transient
protection is provided making it suitable for installation in the harshest of vehicle
installations.
On the RJ45 connector shown in Figure 3:
Connect the BROWN wire on the TW5340 to Positive supply
Connect the BROWN/WHITE wire on the TW5340 to Gnd
6.4 1PPS
The TW5340 provides a one (1) pulse-per second output signal for timing purposes.
Differential 1PSS outputs are provided at RS422 levels.
The 1PPS signal can be synchronized to GPS or GLONASS reference times to an accuracy
within 50 nanoseconds.

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250 ms 750ms
1PPS_A
1PPS_B
0V
3V
0V
3V
Figure 7
The default pulse width is 250 ms, but is configurable from 100 ms to 500 ms. Typical
jitter is 20ns. Signal levels are differential, 0.V to 2.03V.
After obtaining a GPS fix, the 1PPS output will be accurately maintained even when
tracking only one satellite. Once synchronized the 1PPS maintains synchronization
accuracy with no GPS reception by fly-wheeling for a period.
The following examples are provided for termination of the 1PPS signals.

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Figure 8
The balanced driver in the TW5430 is an Intersil 3179E. Please check the data sheet for
additional information.
Cable Delays:
The timing of the 1PPS pulse depends on the length of both antenna and interface
cables, to account for cable delays add 3ns for each meter of cable.
Fix Quality (1PPS Qualification)/Standby
This output has a dual function, by default it is a Fix Quality (1PPS qualification) output.

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If the device is configured to operate in Standby mode the output provides positive
feedback that the device has entered Standby mode.
Fix Quality (1PPS Qualification)
A 1PPS qualification signal is provided to indicates when the 1PPS output is valid,
qualification is based on the configured Fix Quality PDOP value, see section 9.3.
Figure 9 shows the internal 1PPS qualification status of the TW5340. Once the 1PPS
status is detected as good, a Fix Quality Start Delay can be inserted before the 1PPS
qualification signal is output to ensure that the TW5340 has time to average out the
satellite clocks and provide a stable 1PPS output.
On loss of 1PPS qualification status the 1PPS qualification output is maintained for the
Fix Quality Flywheel time, see section 9.3.
0V
2.0 V1PPS Qualification output
1 PPS Qualification status
1PPS
Qual Start delay 1PPS
Qual stop delay
Figure 9
6.5 Wake Up Input
The Wakeup input is pulled high by the TW5340. It must be left in this state to enter
standby mode. When in standby, the wakeup input must be pulled to ground to cause
the TW5340 to exit Standby mode and return to Navigation mode.
7Operating Modes
The TW5340 has three operating modes:
7.1 Navigation Mode
The TW5340 uses the acquisition engine continually resulting in the shortest time to
first fix. It searches all possible satellites until the almanac is completely downloaded,
the receiver then switches to the tracking engine to lower power consumption.

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7.2 Standby Mode
Standby mode stops the navigation operation and all supply inputs are powered down
and power drain is reduced to approx. 200 uA. Standby mode can be configured to
periodically enter and exit standby mode for specified times see section 9.8
The general purpose output pin provides a positive feedback that the device has
entered Standby mode. When Not In standby the output is pulled high, when in standby
the output is floating.
External control
The W5340 can enter Standby mode by issuing a “$PSTMGOTOSTANDBY” command.
$PSTMGOTOSTANDBY,1,<sleep time>,0,<sleep time>
<Sleep time> is the number of seconds to remain in standby mode. Note the two sleep
times in the command must be identical.
The TW5340 can be woken from standby state by the wakeup pin, otherwise it will wake
after the specified “sleep time”
Pin 3 on the TW5340 can be used to wake the device up. To exit Standby mode the
Wake-Up pin must be pulsed low for approximately 1 ms by an open collector output.
Note: If the TW5340 is in Standby mode for greater 30 minutes the ephemeris data may
old and have to be re-acquired before a GNSS position can be resolved resulting in a
cold start of approximately 50 to 90 seconds.
As a rule of thumb the TW5340 should be on for 30 seconds every 30 minutes to
guarantee a hot start of less than 10seconds.
Note: For applications that need to conserve power by waking up quickly from standby
mode and getting a fix as quickly as possible it is recommended that both GPS &
GLONASS constellations are enabled
Initialize GPS time
Acquisition of a position fix can be sped up by initializing the TW5430 with the GPS time.
The following NMEA command can be used $PSTMINITTIME
$PSTMINITTIME,<Day>,<Month>,<Year>,<Hour>,<Minute>,<Second><cr><lf>

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Parameter
Format
Description
Day
dd - decimal, 2 digits
Day of month (01 to 31)
Month
mm –Decimal, 2 digits
Month (01 to 12)
Year
YYYY –Decimal, 4 digits
Year (194 - ….)
Hour
HH –Decimal, 2 digits
Hour (00 to 23)
Minute
MM _ Decimal, 2 digits
Minute (00 to 59)
Second
SS –Decimal, 2 digits
Second (00 to 59
Table 4
The following message will be output on the NMEA communications channel
$PSTMINITTIMEOK<cr><lf> If success
$PSTMINITTIMEERROR<cr><lf> If no success
7.3 Low Power Mode
Contact Tallysman Wireless for details on enabling low power mode.
After the TW5340 has acquired a position fix, and ephemeris and almanac data has been
obtained the receiver is ready to enter Low Power Mode. The TW5340 receiver’s
adaptive power management algorithm switches off RF hardware resources whenever
possible while maintaining a specified performance level.
During low power operation only the highest satellites are tracked and the GLONASS
constellation is switched OFF when not required.

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8Satellite Based Augmentation System (SBAS)
The TW5340 can be configured to use satellite corrections transmitted by SBAS satellites
to provide greater positioning accuracy. There are three compatible SBAS systems
which are integrated to provide a seamless worldwide navigation system.
Configure the SBAS satellite ID closest to your Location.
Service
Satellite Name
NMEA
Satellite ID
(PRN)
Location
(longitude)
WAAS
Inmarsat 4-F3
46
133
98⁰ W
WAAS
Galaxy 15
48
135
133⁰ W
WAAS
Anik F1R
51
138
107.3⁰ W
EGNOS
Inmarsat 3-F2
33
120
15.5⁰ W
EGNOS
Inmarsat 4-F2
39
126
25⁰ E
EGNOS
Inmarsat 3-F1
44
131
64.5⁰ E
MSAS
MTSAT-1R
42
129
140⁰ E
MSAS
MTSAT-2
50
137
145⁰ E
Table 5
Table The default satellite ID is 133 (Suitable for longitudes of those of the Eastern US).
The TW5340 configurator supports the addition of two future SBAS satellite ID’s.

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9TW5340 Configuration
Tallysman provides downloadable software package (part # 45-0030-0) which includes a
Windows based “Configurator”for reading and writing of operating parameters and a
user manual.
Figure 10
Connect the PC to the TW5340 using the Test Adaptor (27-0045-1)
Set the TW5340 Configurator to the COM port speed of the TW5340 (115300 baud is
default).
-Select Program/Read to read the parameters in the TW5300.
(Note It is recommended that the default parameters are saved, so that you can
always retrieve and Write them back if required).
-To write a new set of parameters to the TW5340 select Program/Write
-The configuration file can be save by selecting File/Save.
Note: Most configuration parameters changes do not take effect until the TW5340 is
reset i.e. power cycled.
The configurator provides configuration of the “general” parameters of the TW5340.
Contact Tallysman Wireless to discuss specific parameters that may not be listed.
9.1 GENERAL
Setting new default parameters
If you are operating with STANDBY MODE enabled it is recommended that you write
your parameters to protected flash using the TW5430 configurator.
Select Program/Create Custom firmware with new default configuration

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Figure 11
Select the current firmware build you are running.
Select where your custom firmware build will be output too
Select Create Firmware button.
Loading new Firmware
In the event that Tallysman Wireless releases an upgrade to the TW5340 firmware, or
you wish to write custom firmware ( including new default parameters) to the TW5340.
Select Program/Load firmware
Figure 12
To load Custom firmware using new default parameters select “Use Custom Firmware”
And select the “bin” file to load.
To load a new firmware update to the TW5340 select “Official Firmware”
Select the “Write Speed” based on PC Comm port capability.