Tekron TTM 01-G User manual

TTM 01-G
USER MANUAL

TTM 01-G Manual / October 2018 2
Table of Contents
Introduction ........................................................................................................................................................3
LED Indicators.....................................................................................................................................................3
Inputs and Outputs............................................................................................................................................. 4
ANT: Antenna port (SMA connector) .............................................................................................................. 4
ETH: Ethernet Interface (ST Fiber / RJ45) ........................................................................................................ 4
TX: Fiber Output .............................................................................................................................................4
TTL: TTL Output .............................................................................................................................................4
ALM: Alarm Output.........................................................................................................................................4
OPT: Optional Output.....................................................................................................................................4
Power Supply Options.........................................................................................................................................5
Isolation & Protection..........................................................................................................................................5
Installation ......................................................................................................................................................... 6
Identification...................................................................................................................................................6
Mounting the TTM 01-G..................................................................................................................................6
Connecting the TTM 01-G ...............................................................................................................................6
Product Configuration.........................................................................................................................................7
Lightning Protection .......................................................................................................................................... 8
Appendix............................................................................................................................................................ 9
TTM 01-G Specifications .................................................................................................................................9
Serial Output String (Serial Output Option)........................................................................................................ 9
General Key to Fields...............................................................................................................................9
NGTS Time Code O/P ............................................................................................................................ 10
IRIG J-17 Time Code O/P ........................................................................................................................ 10
String-A Time Code O/P ........................................................................................................................ 10
String-B Time Code O/P .........................................................................................................................11
String-C Time Code O/P .........................................................................................................................11
String-D Time Code O/P .........................................................................................................................11
String-E Time Code O/P......................................................................................................................... 12
String-F Time Code O/P......................................................................................................................... 12
String-G Time Code O/P ........................................................................................................................ 12
NMEA ZDA Time Code O/P ................................................................................................................... 13
NMEA RMC Time Code O/P................................................................................................................... 14
Warranty...........................................................................................................................................................14

TTM 01-G Manual / October 2018 3
Introduction
The TTM 01-G – Tekron’s powerful and cost effective synchronization solution for RTUs, Protection Relays and other
Intelligent Electronic Devices used in electrical sub-stations and industrial control installations.
Utilizing state of the art technology, this compact unit locks onto atomic clock references from the GPS and GLONASS
satellite constellations and produces time codes and pulses with sub-microsecond accuracy and precision.
The TTM 01-G clips onto a standard DIN rail. Its rugged compact design is suitable for noisy electrical environments,
while built in electrical isolation combined with strong push pull drives on outputs simplify wiring schemes and
enhances reliability.
It comes complete with Ethernet cables to allow for customization and easy setup from the Windows™ Configuration
software which is available to download from www.tekron.com. Optional accessories include antenna, low loss antenna
cable, antenna pipe mounting components and lightning protection kit.
Figure 1 – TTM 01-G Front View
LED Indicators
The top of the TTM 01-G features two LED indicators. The SYN LED shows synchronization status, while the ALM
LED shows the alarm status of the unit.
Outputs are synchronized to UTC time only when the SYN LED is fully illuminated.
The tables below provide information regarding the interpretation of the LEDs.
SYN LED
Meaning
Off
The TTM 01-G is not synchronized.
Slow Flash
The TTM 01-G is in hold-over mode.
Fast Flash
The TTM 01-G is out of sync and not in holdover.
On
The TTM 01-G is synchronized.
Table 1 – SYN LED Functionality
ALM LED
Meaning
Off
The TTM 01-G is operating normally and has no alarms.
Fast Flash
An alarm is active. To identify the alarm, use the configuration tool.
Table 2 – ALM LED Functionality

TTM 01-G Manual / October 2018 4
Inputs and Outputs
ANT: Antenna port (SMA connector)
The “ant” antenna input provides an interface for an external active antenna via low-loss cable. The unit can supply 5
Vdc @ 100 mA to power an active antenna. The antenna voltage will automatically fold back to limit the output current
under fault condition. The total combined gain of the antenna system (antenna plus cable and connectors) should fall
in the range of 10 to 35 dB, the optimum being 22 dB.
A Lightning Protection device should be inserted into the antenna cable. A suitable device, complete with additional
cable connectors, a connector crimping tool and mounting hardware is available as an option (see accessories for
details). Use of a Lightning Protector does not degrade the performance of the antenna system.
Care should be taken to ensure that the connector is not cross-threaded when attaching the antenna
cable. The connector should be tightened by hand or with an appropriate SMA torque wrench only. Do
not over tighten.
ETH: Ethernet Interface (ST Fiber / RJ45)
TTM 01-G units are fitted with either a RJ45 10/100 Ethernet interface or a ST multi-mode Fiber 100FX Ethernet
interface. The unit can be configured over the LAN (Local Area Network) and can be upgraded with PTP or NTP /
SNTP Licenses.
To the left of the Ethernet connector are two LEDs with the “LNK” LED above the “ACT” LED. The LNK LED will be on
when the unit is connected to a valid Ethernet port whilst the ACT LED will be on when there is activity on either the
transmit or receive pair.
TX: Fiber Output
The fiber output can be configured by the configuration tool to output an IRIG-B (B00x, B22x) signal, a DCF-77 signal
or user defined pulse. The fiber transmitter is compatible with 50/125 µm, 62.5/125 µm and 100/140 µm multimode
glass fiber.
TTL: TTL Output
The TTL output is a high drive, non-isolated TTL level driver which can be configured by the configuration tool to
output an IRIG-B (B00x, B22x) signal, a DCF-77 signal or user defined pulse.
ALM: Alarm Output
The alarm output is a high voltage AC / DC isolated contact capable of switching up to 300 V at 100 mA. The contact
is AC rated and normally-closed so that the alarmed state is the contacts open (i.e. the same as when the power is off).
The alarm source is configurable by the configuration tool.
OPT: Optional Output
The TTM 01-G has a slot for one IO card to allow a variety of user interfaces. Each card is limited to one additional
port with at least 3 kV isolation from the rest of the system to avoid current loops.
The table below shows the orderable options:
Output Type
Features
TTL
TTL (5 V, 150 mA) IRIG-B (B00x, B22x), DCF-77 or user defined pulse output.
Serial
RS232 level (9 V, 10 mA) output supporting serial strings.
AM IRIG-B
Analog IRIG-B (B12x) signal, typically 8 V with 3:1 mark space ratio. Output Impedance 120 Ω.
Requires a 100 – 180 Ωterminator.
Table 3 – TTM 01-G Available Interface Modules

TTM 01-G Manual / October 2018 5
Power Supply Options
There are three different power supply options available for the TTM 01-G. Low, medium or high voltage supplies are
available and feature similar maximum output ratings but different levels of isolation.
Power Supply
Features
Low
14 – 36 Vdc. Maximum 5 W, 1.6 kV Isolation
Medium
20 – 75 Vdc. Maximum 5 W, 1.6 kV Isolation
High
90 – 300 Vdc. Maximum 5 W, 3.75 kV Isolation
Table 4 – TTM 01-G Available Power Supplies Modules
Isolation & Protection
The GNSS Antenna input is earth referenced; care should be used when installing to prevent earth currents circulating
in the antenna cable. The TTL output features an earthed, non-isolated driver and is designed for connection within
the same rack. Since it is the only output with an earth reference, it is isolated from the power supply via the power
supply isolation and from all other IO by their isolation. All the other outputs are galvanically isolated (including the
optional TTL output card) from the internal electronics and power supply.
The Alarm port has a UL and VDE approved, 3.75 kV isolated contact and is protected by a 600 V, 175 mA self-
resetting fuse and a 350 V transient suppressor diode.
The Copper Ethernet provides 1.5 kV isolation and includes ESD suppression on board.
All optional output cards feature at least 3 kV isolation from earth and have ESD suppression suitable for the interface
type.
The power supply isolation varies from 1.6 kV for Low and Medium voltage power supplies to 3 kV for the High voltage
power supply. In addition, a varistor protects the power supply against transverse voltages and transient suppressor
diodes protect the internal electronics from longitudinal events.

TTM 01-G Manual / October 2018 6
Installation
Identification
Each TTM 01-G unit is shipped with an identification label on the side of the case. The label provides details of the
optional output (if any) and power supply fitted to the unit as well as the unit serial number.
Check the identification label on the side of the unit to ensure that the correct output and voltage range
has been supplied before proceeding to install.
The label on the side of TTM 01-G contains the voltage range: Do not apply power outside of this range!
Mounting the TTM 01-G
The TTM 01-G is designed to be mounted to a standard 'Top Hat' din rail mount using the supplied clips on the base
(See Figure 2). The clips can also be used to screw mount the unit by extending them beyond the case edge.
Figure 2 – Base of TTM 01-G
Connecting the TTM 01-G
The TTM 01-G has a SMA connector, RJ45 / 100Base FX connector and ST Fiber output on the top and a row of rising
clamp screw terminals on the bottom. Any connection not required may be left unterminated. The screw terminals
are designed for the following cables;
• 0.2-4.0mm² (30-12AWG) solid cable
• 0.2-2.5mm² (30-12AWG) stranded cable
The SMA (ANT) connector should be connected to the antenna lead-in cable. Care should be used to ensure that the
cable bend radius is kept within the cable specification and the SMA connector is not placed under strain.
The Fiber TTM 01-G can have a ST multimode Fiber connector for the Ethernet and is labeled ETH on the case
whereas the IRIG-B fiber out is simply labeled TX.
The connections from left to right along the bottom are optional output (OPT) ‘-’ and ‘+’; Alarm (ALM) ‘-’ and ‘+’; TTL ‘-’
and ‘+’; Ground; Power Supply Negative; Power Supply Positive. If the optional output isn’t fitted, then the unused
terminals are covered.

TTM 01-G Manual / October 2018 7
Power Supply
Figure 3: Power Supply Connections
Note: The Power supply has polarity protection built in to prevent damage.
The label on the side of TTM 01-G indicates the type of output Option Card fitted: Do not apply voltages
to output only interfaces!
The power supply should be connected to the PWR terminals at the bottom of the TTM01-G as shown by the red
box in Figure 3: Power Supply Connections Figure 3above.
The GND connection is located next to the power supply input terminals (highlighted in yellow above). This must be
connected to earth for full protection of the TTM.
Figure 4 – TTM 01-G Top Connectors
Figure 5 – TTM 01-G Bottom Connectors
Product Configuration
Any configuration changes will need to be done via the Windows based Configuration Tool. The Configuration Tool is
compatible with and version of Windows after Windows XP Service Pack 3, including Windows 7, 8, 8.1 and Windows 10.
The latest version of the tool is available from the Tekron web site www.tekron.com/TTM01-G under the “Resources”
tab.

TTM 01-G Manual / October 2018 8
Lightning Protection
A lightning Protection kit may be fitted into the antenna lead-in cable. The kit contains a protection device, two
coaxial cable connectors, a connector crimp tool, and mounting hardware.
General
The first line of protection against the effects of lightning-induced surge events involves positioning the antenna in a
“lightning-protected zone” as far as is possible. In practice, this means ensuring that there is at least one other
earth-bonded structure located in the same rooftop area (e.g. another antenna, or a lightning rod) that reaches
significantly higher than the top of the GNSS antenna. The GNSS antenna should then be mounted so that it lies
within a 45-degree angle from the top of the other earth-bonded structure. The GNSS antenna mount itself should
also be securely bonded directly to the building protection earth – and not connected via any of the other earthed
structures.
However, this will not provide immunity from damage caused by a direct lightning strike, or voltages induced in the
antenna lead-in cable due to side flashes or induction.
All Tekron antenna installations should follow the guidelines above – regardless of whether a
separate lightning protection device is to be fitted to the antenna lead-in cable.
In areas with a low incidence of electrical storms, careful attention to antenna positioning and earth
connections may be all the protection deemed necessary. The antenna lightning protection kit LPK 01 affords
additional security through the use of an impulse suppressor installed in the antenna lead-in coax cable. In the event
of a lightning-derived high voltage surge occurring on the coaxial cable, the impulse suppressor activates, short-
circuiting the cable directly to the protection ground.
While the Lightning Protector kit provides a high degree of protection, there is no guarantee of
protection against ALL surge related events, including a direct lightning strike to the antenna.
Careful antenna positioning is strongly advised!
The performance of the antenna system under normal (non-surge) conditions is unaffected by the introduction of a
correctly installed Lightning Protector.

TTM 01-G Manual / October 2018 9
Appendix
TTM 01-G Specifications
Physical Specifications
UL94-V0 polycarbonate flame retardant DIN rail enclosure with IP40 (Ingress Protection rating).
Performance Property
Metric
Dimensions
Width
Depth
Height
72 mm
60 mm
90 mm
Weight
0.15 kg
GNSS Receiver
Performance Property
Metric
Acquisition
Reacquisition
Hot Start
Warm Start
Cold Start
< 2 s (90 %)
< 8 s (90 %)
< 45 s (90 %)
< 50 s (90 %)
Sensitivity Acquisition
Tracking
-160 dBm
-155 dBm
Input and Output Specifications
Type
Electrical
Physical
Accuracy at the port
TTL
5 V (4.5 V @ 150 mA)
2 Pin
< 100 ns of UTC
Fiber (
λ
= 820 nm)1
-19 dB optical power
ST
< 100 ns of UTC
Alarm
265 Vac / 300 Vdc,
100 mA
2 Pin
Ethernet (Copper)
RJ45
Ethernet (Fiber)2
TX: -17 dB optical power
RX: -33 dB sensitivity
Dual ST, ½ inch pitch
Optional Output Specifications
Type
Electrical
Physical
Accuracy at the port
TTL
5 V (4.5 V @ 150 mA)
2 Pin
< 100 ns of UTC
Serial
± 9 V
2 Pin
< 1 ms of UTC
AM IRIG-B
8 V
2 Pin
< 2
µ
s of UTC
Environmental Specifications
Performance Property
Metric
Operating Temperature Range
-10 to 65 oC
Electrical Specifications
Performance Property
Electrical
Physical
Power Supply
Low Voltage
14 - 36 Vdc
2 Pin + common earth
Medium Voltage
20 - 75 Vdc
2 Pin + common earth
High Voltage
90 - 300 Vdc
2 Pin + common earth
Power drain
4 W max
Serial Output String (Serial Output Option)
General Key to Fields
Fields between brackets (‘<’ and ‘>’) represent ASCII character codes. The used codes are in the following table:
1Fibre transmitter is compatible with 50/125 µm, 62.5/125 µm and 100/140 µm multimode glass fiber.
2Fibre Ethernet is compatible with 50/125 µm and 62.5/125 µm multimode glass fiber.

TTM 01-G Manual / October 2018 10
Placeholder
HEX
Content
<SOH>
01
ASCII Start of Header character
<STX>
02
ASCII Start of Text character
<ETX>
03
ASCII End of Text character
<BEL>
07
ASCII BEL character
<LF>
0A
ASCII Line Feed character
<CR>
0D
ASCII Carriage Return character

20
ASCII Space character
NGTS Time Code O/P
Timing Transmitted once per minute. Sent during the last second before the minute rollover to which the data in the
string refers.
Timing
Transmitted once per minute. Sent during the last second before the minute rollover to which the
data in the string refers.
Default Comms
9600 bps, 8-bit ASCII, no parity
Definition
TyyMMDDWhhmmx<CR><LF>
Placeholder
Content
T
"T"
yy
Last two digits of the year: e.g. “12” = the year 2012
MM
Month: “00” = January … “12” = December
DD
Day of Month: 01…31
W
Day of week: “1”=Monday … “7”=Sunday
hh
Two digit hour
mm
Two digit minute
x
Time mode: ”0” = Local time, “1” = UTC time
Example Interpretation:
T020422112340<CR><LF> Monday 22 April 2002 – 12:34 local time
IRIG J-17 Time Code O/P
About
This code is compatible with IRIG Standard 212-00.
Timing
Transmitted once every second. The leading edge of the “start” bit of the first character <SOH> is
exactly on the second that the message describes.
Default Comms
9600 bps, 7-bit ASCII, odd parity
Definition
<SOH>ddd:hh:mm:ss<CR><LF>
Placeholder
Content
ddd
Day of year: range “001” – “366”
:
HEX 3A
hh
hour: “00” – ”23”
mm
minute: “00” – “2”
ss
Seconds: “00” – “59”
Example Interpretation:
<SOH>112:12:34:36<CR><LF> day 112, time 12:34:36
String-A Time Code O/P
About
This code is very similar in data content to the IRIG J-17 code, but adds a two-character field
containing the year, and uses 8-bit ASCII, no parity data format.
Timing
Transmitted once every second. The leading edge of the “start” bit of the first character <SOH> is
exactly on the second that the message describes.
Default Comms
9600 bps, 8-bit ASCII, no parity
Definition
<SOH>ddd:hh:mm:ss:yy<CR><LF>

TTM 01-G Manual / October 2018 11
Placeholder
Content
ddd
Day of Year: range “001” – “366”
:
HEX 3A
hh
hour: “00” – ”23”
mm
minute: “00” – “59”
ss
seconds: “00” – “59”
yy
year: “00” – “99” representing the last two digits of the year since 2000
Example Interpretation:
<SOH>112:12:34:36:10<CR><LF> day 112, time 12:34:36, year (20)10
String-B Time Code O/P
About
This code substitutes a “Quality” indicator byte for the year field, but otherwise is identical in form,
function and timing to String-A.
Timing
Transmitted once every second. The leading edge of the “start” bit of the first character <SOH> is
exactly on the second that the message describes.
Default Comms
9600 bps, 8-bit ASCII, no parity
Definition
<SOH> ddd:hh:mm:ssQ<CR><LF>
“Quality” Character (Q)
Content
HEX
ASCII
20
‘ ’ (space)
Clock in sync, timing accuracy is better than 60 ns
2E
‘.’ (full stop)
Clock is accurate to 1
µ
s
2A
‘*’
Clock is accurate to 10
µ
s
23
‘#’
Clock is accurate to 100
µ
s
3F
‘?’
Clock accuracy may be worse than 100 µs
*Refer to String-A table (above) for the definitions of the common digits
Example Interpretation:
<SOH>112:12:34:36?<CR><LF> day 112, time: 12:34:36, >100 µs sync error
String-C Time Code O/P
About
This code is effectively a combination of String-A and String B. It provides both year information
and a sync indicator field.
Timing
Transmitted once every second. The leading edge of the “start” bit of the first character, <CR>, is
exactly on the second to which the message data refers.
Default Comms
9600 bps, 8-bit ASCII, no parity
Definition
<CR><LF>Qyydddhhmmss.000
Placeholder
Content
Q
Quality indicator: ‘ ‘ = in-sync, ‘?’ = out-of-sync

HEX 20 (space)
yy
Year: “00” – “99” representing the last two digits of the year
ddd
Day of year: range “001” – “366”
Placeholder
Content
hh
hour: “00” – ”23”
mm
minute: “00” – “59”
ss
seconds: “00” – “59”
.000
ASCII “.000”
Example Interpretation:
<CR><LF>? 02 112 12:34:36.000 day 112 of year (20)02, time: 12:34:36, out-of-sync
String-D Time Code O/P
String-D is IDENTICAL in content to String-B, but the second mark is at the leading edge of the start-bit of the (<CR>).

TTM 01-G Manual / October 2018 12
Example Interpretation:
<SOH>112:12:34:36?<CR><LF> day 112, time: 12:34:36, >100 µs sync error
String-E Time Code O/P
About
This provides time, year information, and a sync indicator field.
Timing
The string is transmitted once every second, with the leading edge of the “start” bit of the <CR>
exactly on the second.
Default Comms
9600 bps, 8-bit ASCII, no parity
Definition
<SOH>YYYY:ddd:hh:mm:ssQ<CR><LF>
Placeholder
Content
YYYY
4-digit year
:
HEX 3A
ddd
Day of year: range “001” – “365”
hh
hour: “00” – ”23”
mm
minute: “00” – “59”
ss
seconds: “00” – “59”
Q
Quality character, as defined in String-B (above)
Example Interpretation:
<SOH>2004:112:12:34:36?<CR><LF> 2004, day 112, 12:34:36pm, >100us sync error
String-F Time Code O/P
About
This string complies with the protocol required to drive Vorne type Time Displays.
Timing
The string is transmitted once every second, with the leading edge of the “start” bit of the last
<BEL> exactly on the second.
Default Comms
9600 bps, 8-bit ASCII, no parity
Definition
<CR><LF>1100<CR><LF>44hhmmss<CR><LF>54ddd<CR><LF><CR><LF>45HHMMss<CR>
<LF>55DDD<CR><LF><BEL>
Placeholder
Content
1100
ASCII “1100”
44
ASCII “44” (means local time follows)
hh
Local hour of day: “00” – ”23”
mm
Local minute of day: “00” – “60”
ss
seconds: “00” – “59”
54
ASCII “54” (means local day of year follows)
ddd
Local day of year: “001” – “365”
45
ASCII “45” (means UTC time follows)
Placeholder
Content
HH
UTC hour: “00” – ”23”
MM
UTC minute: “00” – “59”
55
ASCII “55” (means UTC day of year follows)
DDD
UTC Day of year: “001” – “365”
String-G Time Code O/P
About
This general time string is used predominantly in Europe.
Timing
The string is transmitted once every second, with the leading edge of the “start” bit of the last
<ETX> exactly on the second.
Default Comms
9600 bps, 8-bit ASCII, no parity
Definition
<STX>swhhmmssDDMMyy<LF><CR> <ETX>
Placeholder
Content
s
Clock Status (see below)
w
Day of Week (see below)

TTM 01-G Manual / October 2018 13
hh
hour of day: “00” – ”23”
mm
minute of day: “00” – “60”
ss
seconds: “00” – “59”
DD
day of month: “01” – “31”
MM
month of year: “01” – ”12”
yy
year: “10” – “99”
Clock Status
The s “Clock Status” is an ASCII character in the range 0-9, A-F representing a single hex digit (nibble)
Bits
3
2
1
0
0
No announcement for time change
1
Announcement for time change – active for an hour before
0
Local Standard Time (LST)
1
Daylight Saving Time (DST)
0
0
Time/date invalid – clock is out of sync
0
1
Hold-over mode – running on local Oscillator
1
0
GPS / IRIGB controlled mode
1
1
GPS / IRIGB controlled mode (high accuracy)
Day of Week
The w “Day of Week” is an ASCII character in the range 1-7, 9, A-F representing a single hex digit (nibble)
Bits
3
2
1
0
0
Local Time
1
UTC time
0
0
1
Monday
0
1
0
Tuesday
0
1
1
Wednesday
1
0
0
Thursday
1
0
1
Friday
1
1
0
Saturday
1
1
1
Sunday
Example Interpretation:
<STX>E3123456170410<LF><CR><ETX> High Accuracy Mode, DST, Wed, 12:34:56, 17/4/2010
NMEA ZDA Time Code O/P
About
This string is defined by the NMEA-0183 standard and transmitted at 9600 bps.
Timing
Transmission is once every second. The leading edge of the “start” bit of the “$” is exactly on the
second.
Default Comms
9600 bps, 8-bit ASCII, no parity
Definition
$GPZDA,hhmmss.00,dd,MM,YYYY,s,xx,yy*CC<CR><LF>
Placeholder
Content
$GPZDA
ASCII “$GPZDA”
,
ASCII “,” (comma)
hhmmss.00
UTC hour of day, minute, seconds (millisecond = 0) (0 – 23 hour, 0 – 59)
dd
UTC day of month: “01” – “31” depending on which month
MM
UTC month: “01” – “12”, “01” = January
YYYY
UTC year, 4 digits.
s
Local time zone offset sign (positive means local time leads UTC)
xx
Local time zone offset from UTC in hours
yy
Local time zone offset from UTC in minutes

TTM 01-G Manual / October 2018 14
*
ASCII “*”
CC
2-digit hex representation of the result of XORing the 8 data bits of each character between, but
not including the "$" and "*". (00-FF)
Example Interpretation:
$GPZDA,123456.0023042010+1200* UTC time is 12:34:56, 23 April 2010, the local time offset is +12:00
NMEA RMC Time Code O/P
About
This string is defined by the NMEA-0183 standard and transmitted at 9600 bps.
Timing
Transmission is once every second. The leading edge of the “start” bit of the “$” is exactly on the
second.
Comms
9600 bps, 8-bit ASCII, no parity
Definition
$GPRMC,hhmmss.00,a,tttt.tttt,N,ggggg.gggg,W,0.0,0.0,ddmmyy,0.0,E*CC<CR><LF >
Placeholder
Content
$GPRMC
ASCII “$GPRMC”
,
ASCII “,” (comma)
Hhmmss.00
UTC hour of day, minute, seconds (millisecond = 0) (0 – 23 hour, 0 – 59)
a
Status: “A” = valid, “V” = invalid
tttt.tttt
Latitude (degrees, minutes): “00” – “89” degrees; “00.0000” – “59.9999” minutes
N
Latitude (north/south): “N” = north, “S” = south
ggggg,gggg
Longitude (degrees, minutes): “000” – “180” degrees; “00.0000” – “59.9999” minutes
W
Longitude (east/west): “E” = east, “W” = west
ddmmyy
UTC day of month, month & 2-digit year
0.0
ASCII “0.0”
E*
ASCII “E*”
CC
2-digit hex representation of the result of XORing the 8 data bits of each character between, but not
including the "$" and "*".
Warranty
For terms and conditions of Tekron’s Warrantee see the Web Site
http://tekron.com/about-tekron/warranty
WARNING
This product has been designed to comply with the limits for a Class A digital device pursuant to Part 15 of FCC rules.
These limits are designed to provide reasonable protection against such interference when operating in a commercial
environment.
Notes
The information in this manual may change without notice. The manufacturer assumes no responsibility for any errors
that may appear in this manual.
Ethernet is a trademark of XEROX Corporation. Windows, Windows 95, Windows 98, Windows 2000, Windows NT,
Windows XP, Windows Vista, Windows 7, Windows 8 and Windows 10 are trademarks of Microsoft™ Corp.
Copyright ©2018 Tekron International Ltd. All rights reserved. No part of the contents of this document may be transmitted or reproduced in any form or by any
means without the written permission of Tekron International Ltd. Published in New Zealand.