Toshiba HHGP1 GPS Receiver User Manual

INSTRUCTION MANUAL

GPS RECEIVER UNIT

HHGP1

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TOSHIBA Corporation 2001

( Ver. 1.6 )

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Safety Precautions

Before using this product, please read this chapter carefully.

This chapter describes the safety precautions recommended when using the GPS receiver unit type HHGP1. Before installing and using the equipment, this chapter must be thoroughly read and understood.

Explanation of symbols used

Signal words such as DANGER, WARNING, and two kinds of CAUTION, will be followed by important safety information that must be carefully reviewed.

DANGER

WARNING

Indicates an imminently hazardous situation which will result in death or serious injury if you do not follow the instructions.

Indicates a potentially hazardous situation which could result in death or serious injury if you do not follow the instructions.

CAUTION

Indicates a potentially hazardous situation which if not avoided, may result in minor injury or moderate injury.

CAUTION

Indicates a potentially hazardous situation which if not avoided, may result in property damage.

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DANGER

Install a surge arrester between the antenna and the GPS receiver and ground it in accordance with the guidelines in this manual. Otherwise, it may cause electric shocks, injury or malfunction.

WARNING

Do not touch the terminals of this equipment while the power is on, as the high voltage generated is dangerous.

Hazardous voltage can be present in the DC circuit just after switching off the DC power supply.

It takes approximately 30 seconds for the voltage to discharge.

When connecting this equipment via an optical fibre, do not look directly at the optical signal.

CAUTION

• Earth

The earthing terminal of the equipment must be securely earthed.

CAUTION

The equipment must only used within the range of ambient temperature, humidity and dust detailed in the specification and in an environment free of abnormal vibration.

• Ratings

Before applying the DC power supply to the equipment, check that they conform to the equipment ratings.

Carefully handle the connection cable without applying excessive force.

• Modification

Do not modify this equipment, as this may cause the equipment to malfunction.

• Disposal

When disposing of this equipment, do so in a safe manner according to local regulations.

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Safety Precautions 1

1. Introduction 5

2. Characteristics 5

3. Configuration 6

3.1

Configuration of GPS Receiver Unit

3.2

Outline of GPS Receiver Unit and Function

4. Handling

4.1

Setting the GPS Receiver Unit

4.2

How to Turn on the Power

4.3

Checking the 1PPS Signal

5. Operation 10

5.1

1PPS Signal Output

5.2

Time Data Output

8

6. Installation 12

6.1

Receipt of GPS Receiver Unit

6.2

Installing GPS Receiver Unit

6.3

Installing Antenna

6.4

Installing Surge Arrester

6.5

Installing Fibre Optics

6.6

Connecting the Power Supply and the Earthing Terminal

7. Preparation for Installation

7.1

Selecting an Antenna and Cables

7.2

Selecting Coaxial Cables and Conversion Adapters

7.3

Selecting an Antenna Installation Location

8. Maintenance 19

8.1

Regular Maintenance 19

8.2

Troubleshooting 19

17

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Appendix A Outline of GPS Rceiver Unit

Appendix B Technical Data

Appendix C Specification of Recommended Antenna and Arrester

Appendix D Supplement

The data given in this manual are subject to change without notice. (Ver. 1.6)

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1. Introduction

The GPS (Global Positioning System) receiver unit is a device that receives the information from satellites and outputs time signals synchronous to UTC (Universal Coordinated Time) to external devices. The GPS receiver unit provides multiple outputs with optical signals for noise immunity.

2. Characteristics

■

Highly accurate time signal output

Realizes a precision with respect to ±2

µs for UTC (UTC: Universal Coordinated Time)

(excluding the propagation delay time on the cable).

■

Reduced cabling work

Adopting the signal superimposition method, the unit can be connected to an external device with a single optical fibre only.

■ Application to a large system

Equipped with eight ports for output, the time distribution can be made to multiple devices separated from each other by a maximum of 1 km.

■

High reliability

Aimed at reducing the number of parts through high-integration circuits and high-density mounting technology, thus securing high reliability.

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3. Configuration

3.1 Configuration of GPS Receiver Unit

Figure 3.1.1 shows the configuration of the GPS receiver unit.

The GPS receiver unit receives electromagnetic signals from satellites through an antenna and outputs time data to external devices. Through an internal receiver, the unit generates serial time data and 1-second pulses (1PPS signals), based on the received electromagnetic signal. Each

1PPS signal occurs at the instant in time given by its accompanying frame of serial data.

To reduce the number of cables to external devices, time data and 1PPS signals are superimposed through a mixing circuit before being output to the optical fibre.

Antenna

Receiver

Backup

Capacitor

Time data

Mixing Circuit

1 Pulse per second

(1PPS)

E/O E/O

Power supply

+48V

E/O E/O E/O E/O E/O

Fibre-optic Cable

Noise

Filter

DC/DC

Converter

E/O

Electrical-to-optical

Converter

+5V

Figure 3.1.1 Configuration of GPS Receiver Unit

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3.2 Outline of GPS Receiver Unit and Function

Figure 3.2.1 shows outline and functions of GPS receiver unit.

④

FRONT VIEW

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REAR VIEW

⑤

① ② ③

⑥ ⑦

48V

⑧

No. Device Indication

①

Yellow LED 5 V

Functions

Turns on when the power (5Vdc) is supplied.

②

Yellow LED

③

Red LED

④

DIP switches

1PPS OUT

ERROR

DSW

Blinks when 1PPS signals are output synchronously with UTC.

Turns on when the internal crystal oscillator stops.

⑤

⑥

Signal output ports OPT.OUT

Power supply switch INPUT

Set the GPS receiver unit settings. During operation, these DIP switches are covered to prevent erroneous operations.

Outputs time signals. The optical fibre is connected here.

Turns on or off the power of the GPS receiver unit.

⑦

Terminal block

⑧ Antenna terminal

ANT.IN

The 48V dc power is applied and the earth cable is connected.

P: 48Vdc, N: 0Vdc, E: earth

The antenna cable is connected.

Figure 3.2.1 Outline and Functions of GPS Receiver Unit

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4. Handling

4.1 Setting the GPS Receiver Unit

The GPS receiver unit is set in accordance with the requirements of the system by using the DIP switches located on the front panel of the unit.

To prevent erroneous operations, the DIP switches are protected with a cover. As shown in

Figure 4.1.1, when the cover is rotated after loosening the cover screw with a screwdriver, the switches are exposed thus making it possible to handle them. Switches are handled with a sharp-pointed object such as a screwdriver and set to “ON” or “OFF” by pushing them up or down respectively. After accessing the switches, tighten the cover screw to its original state.

DSW

１２３４

Figure 4.1.1 Switch Operation Method

Four switches are numbered 1 to 4 from left to right. (The numbers are indicated on their respective switches.)

Table 4.1 shows the function and setting of each switch. (All the switches are set to “OFF” for default setting.)

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Switch

No.

Table 4.1 Setting the Switches

Setting

Function

3 change mode Location fixing mode Location estimation mode

High-reliability/TRAIM ON mode change

Optical level test Continuous light emission Normal light emission

2020 – 2039 (Year) 2001 – 2019 (Year) change

Note: Settings can be changed when the power is ON, but changes are not valid until the power has been switched OFF and ON again, except in the case of switch 3 for optical level testing, which is valid immediately.

- In the case of location mode, the location estimation mode (OFF) should be used.

- In the case of reliability/TRAIM, the High-reliability/Train ON mode (SW-OFF) should be used.

- In high-reliability mode, the unit outputs the 1PPS signal only when no failed satellites are detected. In the case of two or more failed satellites, correct operation of the unit cannot be assured.

- In the case of clock range change, the switch should be OFF before 2019 and ON after 2020.

For the details, see the Appendix D.

4.2 How to Turn on the Power

Turn on the power switch. Power ON is confirmed by the illumination of the "5V" LED on the front panel of the unit.

4.3 Checking the 1PPS Signal

After the power is turned on, check that 1PPS signals are output. If 1PPS signals are not output, it is impossible to use the time signals that are output from the GPS receiver unit. Output of 1PPS signals is confirmed by the blinking of the "1PPS OUT" LED on the front panel of the unit.

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5. Operation

5.1 1PPS Signal Output

The GPS receiver unit outputs 1PPS signals with each pulse defining the instant of time described by the preceding frame of serial data. (For the time signal transmission format, refer to

Appendix D.)

Following power-up, the GPS receiver begins outputting 1PPS signals after the acquisition of the almanac data and the estimation of the receiver location (or the antenna location to be more exact) are completed.

Almanac data received from the satellites include satellites outline orbit information and UTC time correction parameters. It takes about 12 to 30 minutes to acquire the data.

The almanac data is backed up temporarily following power-down. If power is removed for 16 hours or more, then the data back-up may be lost and will have to be re-acquired on power-up.

If the almanac data back-up is valid on power-up, acquisition of almanac data is unnecessary.

To estimate the location, signals from four or more satellites are required in the case of normal mode; and five or more are required in the case of high-reliability mode.

Note: If the antenna is positioned in the shade of buildings, or in other locations where it is difficult to receive satellite signals, then location estimation may take a longer time or may even be impossible.

If satellites are closely aligned in relation to the receiver, then it may not be possible to achieve a location estimate, even when the necessary numbers of signals are received. The reason for this is that, as the angle between received signals becomes small, the error in location estimation becomes large.

Accordingly, installing an antenna in a location of narrow visual field such as between tall buildings may make the location estimation impossible. When using the high-reliability mode and/or TRAIM function, the alignment of satellites has even stricter limits.

The location estimation may take more than an hour depending on constellation of satellites in case of the high-reliability mode.

The location estimation is required each time the power is turned on.

After the location estimation is completed, the 1PPS signal is output in normal mode if signals from one or more satellites are received; and two or more in high-reliability mode.

The initialization time for the 1PPS signal at power-up varies as shown in Table 5.1.1, depending on the state of the almanac data back-up.

Table 5.1.1 1PPS Output Start Time

Back up of almanac data Initial time needed for 1PPS signal output from power on

Lost 30 seconds to 1 hours (*1)

Available 10 seconds to 1 hours (*1)

(*1) It may take further time depending on constellation of satellites and antenna position.

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Number of receivable satellite signals

Four receivable satellite signals

Five receivable satellite signals

1PPS output

Power ON

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Two receivable satellite signals

One receivable satellite signal

Stop

Time

1PPS output

(In the case of normal mode)

Almanac data reception

(12 to 30 minutes)

1PPS output 1PPS stop 1PPS output

(In the case of highreliability mode)

Figure 5.1.1 Receiving Satellite Signals and 1PPS Output Status

5.2 Time Data Output

On power-up, time data (serial data consisting of year-month-date and hour:minute:second) is output from the receiver's internal RTC (real time clock).

If satellite signals are received, then time data transmitted by the satellite (i.e., GPS time) is output until acquisition of the almanac data is completed. The GPS time deviates from UTC time by an accumulated number of leap seconds.

When reception of the almanac data is completed, then UTC time is output.

Any device receiving this output data can distinguish between the RTC, GPS and UTC time data, since this is indicated in the data itself.

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6. Installation

6.1 Receipt of GPS Receiver Unit

When GPS receiver units are received, carry out the acceptance inspection immediately. In particular, check for damage during transportation, and if any is found, contact the vendor.

Always store the GPS receiver units in a clean, dry environment.

6.2 Installing GPS Receiver Unit

CAUTION

Do not remove flanges from the main unit, as this may cause a failure.

The flanges attached to both sides of the unit are used to fix the main unit to a rack or plain table installed in a stable location.

DANGER

A surge arrester must be installed between the antenna and the GPS receiver unit. It must be grounded according to the methods specified in section 6.4 so as to prevent injury or malfunction.

Install the antenna in the specified location in the method shown in the diagrams below.

CAUTION

An improper antenna installation location may cause malfunctions.

Locate the antenna as far as possible from other antennas. If the antenna is located within one meter from other antennas, it may not be possible to receive the GPS signal correctly.

Antenna

Another antenna

Locate over the top of fence.

More than 1 meter

Locate over the top of fence.

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Don’t locate in shade of obstructing objects (Box, antenna, etc.).

Don’t locate in shade of obstructing objects

(Box, antenna, etc.)

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Next, connect the antenna to the arrestor with a coaxial cable.

The following antennas are recommended: GPA-014B or GPA-017S manufactured by Furuno

Electric Co., Ltd. The specifications for and dimensions of these antennas are described in

Appendix C.

The antenna should be fixed to a support pole with Debe clamps and U bolts. An example installation of the Furuno Electric antenna, using the accompanying clamps, is shown in Figures

6.3.1, 6.3.2 and 6.3.3.

Antenna

Wind the tape to cover the whole of junction and U-shaped gap.

Pipe

Leave the connector slightly loose so that no excessive force is applied.

Connector junction.

Insulation prevention measure

(Autofusion tape, vinyl tape or water-proof cap)

Parker clamp

Auxiliary mounting bracket

Support pole (φ25 to 70)

Convex

Antenna cable

Figure 6.3.1 An Example of Installation, Using GPA-017S for Antenna

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Debe clamp

Antenna

Connector junction

Insulation treatment

(Autofusion tape, vinyl tape or water-proof cap)

Fix the cable to the support cable by making a circle while making sure the cable is long enough.

Coaxial cable

Support pole (

φ38 to 64 )

Figure 6.3.2 An Example of Installation, Using GPA-014B for Antenna (A)

Antenna

Leave the connector slightly loose so that no excessive force is applied.

Connector junction.

Parker clamp

Auxiliary mounting bracket

Support pole (

φ27 to 90)

Insulation prevention measure

(Autofusion tape, vinyl tape or water-proof cap)

Tape

Antenna cable

Figure 6.3.3 An Example of Installation, Using GPA-014B for Antenna (B)

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6.4 Installing Surge Arrester

The GPS antenna must be installed outdoors, so a surge arrestor is required as a measure against induced surges due to lightening. (This is not effective against a direct lightening strike.)

The arrestor should be installed at the point where the coaxial cable from the antenna enters the building. A recommended arrestor is CA-23RS made by Daiichi Denpa Kogyo. The specifications for and the appearance diagram of the arrestor are described in Appendix C. The surge arrestor is not water-proof and should be installed in a box. Connect the coaxial cable to the arrestor by an N-type connector.

Stitch or solder a copper earth wire, 2.5 to 3.2 mm in diameter, to the earthing terminal on the arrestor. Connect the other end of the wire to the arrestor’s own earthing point. Make the connection distance between the arrester and the earthing point as short as possible and protect the earth cable with an insulation pipe.

The surge arrestor must have its own direct connection to earth and must not share an earth connection with other equipment. Failure to comply with this requirement will result in risk of electric shock at time of lightening strike.

6.5 Installing Fibre Optics

For the fibre optic connection, multi-mode GI fibre (62.5/125

µm) is used. When laying fibre optic lines, ensure a minimum curvature radius of 50 mm.

CAUTION

Do not bend the fibre optic cable sharply, as this may damage it and may cause malfunctions.

Ensure that fibre optic connectors are fixed securely.

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6.6 Connecting the Power Supply and the Earthing Terminal

Connect the 48Vdc power cable and the earth cable to the terminal block with M4 crimped terminals. For safety purposes, make sure that the earth connection is reliable.

CAUTION

The earthing terminal must be securely earthed. The failure to ground may cause malfunctions, electric shocks or injury.

Fibre optic cable to relay

48V

Adapter

Earth

Antenna

Co - axial cable

Arrester

Co - axial cable

Earth

(Earth the arrester only.)

Figure 6.6.1 External Connection of GPS Receiver Unit

Adapter

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7. Preparation for Installation

The following issues should be considered prior to commencing installation of the system.

7.1 Selecting an Antenna and Cables

The choice of antenna and cable types should be made based on the distance from the antenna installation site to the GPS receiver unit installation site, and also on the cabling conditions.

Coaxial cables of characteristic impedance 50 ohms are required. The signal frequency is

1.57GHz.

The antennas may be selected according to the distance between the sites. In the case of areas where snow is prevalent, the use of pole-shaped antennas is advisable.

The maximum extension lengths of cables based on the combinations of antennas and cables are shown in Table 7.1.1. It shows the lengths from the antenna to the GPS receiver unit.

GPA-017S antenna

GPA-014B antenna

Table 7.1.1 Maximum Extension Lengths of Cables Based on Combinations of

Antennas and Cables

RG213

Coaxial Cable Type

Fujikura 5D-FB Belden 9913 Westflex 103 Fujikura 8D-FB

16m 25m 35m 35m 35m

33m 50m 75m 75m 75m

7.2 Selecting Coaxial Cables and Conversion Adapters

N-type (NP) connectors are installed on both ends of the coaxial cables. Conversion adapters are required, since different types of connector are fitted on the antenna, surge arrestor and GPS receiver.

Required conversion adapters are as shown in Table 7.2.1.

Part

Connector conversion from coaxial cable to antenna

Connector conversion from the coaxial cable to the GPS receiver unit

Table 7.2.1 List of Conversion Adapters

Required conversion adapter

NJ-BNCP adapter or NJ-TNCP conversion cable (within 1 m)

NJ-BNCP adapter

Remark

The 5D-FB and RG213 cables can be fitted with a BNC-P connector, in which case, no conversion adapter is needed for connection to the BNC-fitted antenna and

GPS receiver unit.

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7.3 Selecting an Antenna Installation Location

CAUTION

If antenna is not located in the method described below, it may not be possible to receive the

GPS signal correctly.

Obstructing object is not allowed in this area.

15°(maximum)

Antenna

Support pole

（ fix to fence etc.）

Roof of building

Neighbouring building

The antenna is installed outdoors to receive satellite transmissions. It should be installed in a location that offers an unobstructed view of the sky with an elevation angle of 15 degrees to horizontal. This is imperative for operation in high-reliability mode with operation of the

TRAIM function, since it is necessary to received signals from satellites which are widely spaced. These restrictions can be relaxed for normal mode operation.

Since the alignment of satellites varies during the course of a day, it is necessary to test that the installation is adequate to allow immediate location estimation and continuous 1PPS output for an entire one day period.

On sites where installation conditions are not ideal then it may be necessary to conduct a survey to establish whether reception quality is adequate. This may include situations where the antenna must be mounted on a wall, or if the visual field is narrow or if the site is close to structures which reflect electromagnetic waves.

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8. Maintenance

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Surge arrestors are degraded by lightening induced voltages, resulting in changes to their discharge breakdown voltage. They require periodic checks and should be replaced if necessary.

They can be checked by removing the internal components from the arrestor cabinet. The glass pipe part should be inspected and if it has turned black then replacement is required.

CAUTION

The surge arrestor must be periodically maintained to prevent malfunction.

8.2 Troubleshooting

In the event of failure or unexpected behaviour of the unit, the following items should be checked.

Symptom

"5V" LED is off.

"ERROR" LED is on.

"1PPS OUT" LED does not start to blink after power ON.

It takes a long time until

"1PPS OUT" LED starts blinking after power ON.

Possible cause and / or remedy

Check that power connections to the unit are made correctly and that the power supply switch on the front panel is ON. If so, then a failure of the internal power supply unit is a possible cause.

The GPS receiver unit is failed. The internal circuit clock has stopped oscillating.

Check the antenna location and connection.

Check that the DIP switches are set to proper positions.

In cases where the power has been turned off for 16 hours or more, internal back-up data may be lost and it may take about 30 minutes before the unit is ready to output the 1PPS signal. This case is not an error.

However, if 1PPS is not output after about 30 minutes, check that the antenna is installed in a satisfactory location.

Check to make sure that the antenna is installed in a satisfactory location. During operation, the 1PPS output is interrupted.

Data cannot be detected on the receiving device.

The 1PPS signal or the time data is irregular.

"1PPS OUT" LED does not turn on.

Check that the optical fibre is connected securely and that it is not damaged or severely bent

(minimum bend radius is 50mm).

Possible failure of the internal receiver.

Check that the DIP switches are set to proper positions.

If a failure continues, stop using the GPS receiver unit and contact the vendor.

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Appendix A

Outline of GPS Receiver Unit

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Outline

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Panel cutout

φ7 hole

266

260.0

4-R3.5

2.3

12.5

7.0

45.0

70.0

7.0

12.5

290.0

308.0

140.0

162.5

45 72

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Appendix B

Technical Data

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TECHNICAL DATA

Ratings

DC power supply: 48Vdc-10W

(Operative range: 38.4 to 57.6Vdc)

AC ripple on dc supply IEC 60255-11: maximum 12%

DC supply interruption IEC 60255-11: less than 10ms at 48Vdc

Permitted duration of dc supply voltage

interruption to maintain normal operation

Mechanical design

Weight: 2.7kg mounting

Receiving function

Number of receiving satellites:

Receive signals:

Receive frequency:

Eight satellites received in parallel

L1 C/A code

1575.42 MHz

Time transfer accuracy

Within±2µs with respect to UTC（When the receiver is tracking GPS Satellites）

Data backup

Data life:

Communication Interface

more than 16 hours

Cable type: GI multimode optical fibre (62.5/125

µm or

50/125

µm)

Wavelength: 820nm

Cable Length: 0 to 1km (3dB/km)

GPS antenna interface

Preamp power supply for Antenna Min 4.5V(at 20mA), Min 4.0V(at 40mA)

Cable type: 50 ohm coaxial cable

GPS antenna

NF:

Gain: 10 to 35dB(Antenna + Amp + Cable)

Max 3dB

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Environmental Performance Claims for GPS Receiver

Test Standards Details

Atmospheric Environment

Temperature IEC60068-2-1/2

Operating range: -10

°C to +55°C.

Storage / Transit: -25

°C to +70°C.

Humidity IEC60068-2-3 56 days at 40

°C and 93% relative humidity.

Mechanical Environment

Vibration IEC60255-21-1 Response - Class 1

Endurance - Class 1

Shock and Bump IEC60255-21-2 Shock Response Class 1

Shock Withstand Class 1

Bump Class 1

High Voltage Environment

Dielectric Withstand

High Voltage Impulse

IEC60255-5

2kVrms for 1 minute between PSU terminals and earth.

Three positive and three negative impulses of 5kV(peak),

1.2/50

µs, 0.5J between all terminals and between PSU terminals and earth.

Electromagnetic Environment

High Frequency

Disturbance /

IEC60255-22-1 Class 3

Damped Oscillatory

Wave

IEC61000-4-12,

EN61000-4-12 Class 3

Electrostatic

Discharge

IEC60255-22-2 Class 4

Radiated RF

Electromagnetic

Disturbance

Fast Transient

Disturbance

Conducted RF

Electromagnetic

Disturbance

Conducted

Disturbance over

Freq. Range 15Hz to

150kHz

IEC60255-22-3 Class 3

IEC60255-22-4 Class 4

IEC60255-22-6 Class 3

IEC61000-4-16,

EN61000-4-16, Class 3

Power Frequency

Disturbance

IEC60255-22-7

1MHz 2.5kV applied to PSU terminals in common mode.

1MHz 1.0kV applied to PSU terminals in differential mode.

0.1MHz 2.5kV applied to PSU terminals in common mode.

0.1MHz 1.0kV applied to PSU terminals in differential mode.

8kV contact discharge.

15kV air discharge.

Field strength 10V/m for frequency sweeps of 80MHz to 1GHz and 1.7GHz to 2.2GHz. Additional spot tests at 80, 160, 450,

900 and 1890MHz.

4kV, 2.5kHz, 5/50ns applied to PSU terminals in common mode.

10Vrms applied over frequency range 150kHz to 100MHz.

Additional spot tests at 27 and 68MHz.

Varying voltages applied in common mode as follows:

15Hz to 150Hz: 10V

→ 1Vrms (20dB/decade)

150Hz to 1.5kHz: 1Vrms

1.5kHz to 15kHz: 1

→ 10Vrms (20dB/decade)

15kHz to 150kHz: 10Vrms

300V 50Hz for 10s applied to PSU terminals in common mode.

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Surge Immunity

Conducted and

Radiated Emissions

IEC61000-4-5,

EN61000-4-5

EN55022 Class A

Power Frequency

Magnetic Field

IEC61000-4-8,

EN61000-4-8, Class 4

Pulsed Magnetic Field IEC61000-4-9,

EN61000-4-9, Class 5

Damped Oscillatory

Magnetic Field

IEC61000-4-10,

EN61000-4-10, Class 5

European Commission Directives

89/336/EEC

73/23/EEC

1.2/50

µs surge applied to PSU terminals in common/differential modes: 2kV/1kV (peak)

Conducted emissions:

0.15 to 0.50MHz: <79dB (peak) or <66dB (mean)

0.50 to 30MHz: <73dB (peak) or <60dB (mean)

Radiated emissions:

30 to 230MHz: <30dB

230 to 1000MHz: <37dB

Field applied at 50Hz with strengths of:

30A/m continuously,

300A/m for 1 second.

6.4/16

µs magnetic pulses (positive and negative) applied with magnitude 1000A/m.

Oscillation frequencies of 0.1MHz and 1MHz applied with magnitude 100A/m.

Compliance with the European Commission Electromagnetic

Compatibility Directive is demonstrated according to generic

EMC standards EN50081-2 and EN50082-2.

Compliance with the European Commission Low Voltage

Directive is demonstrated according to generic safety standards EN61010-1 and EN60950.

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Appendix C

Specification of Recommended

Antenna and Arrester

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Recommended Antenna

Manufacturer

Operating connector

Applicable connector

Gain

Preamplifier noise index

Supply voltage

Current consumption

Operating temperature

FURUNO Electric Co.,Ltd.

BNC-J

BNC-P

29 to 35dB

No more than 2.1dB

4 to 13V

25 to 30mA

- 30 to + 80℃

FURUNO Electric Co.,Ltd.

TNC-J

TNC-P

22 to 33dB

No more than 1.6dB

4.0 to 5.5V

No more than 25mA

- 25 to + 65℃

Storage temperature - 40 to + 85℃ - 35 to + 75℃

Weight Approx.

± 30g

φ42.2

φ69

290

85.5

200

GPA－014B

3D-XV

BNC-J

200

Outline of Antenna

GPA－017S

3D-2V

TNC-J

 28 

6 F 2 S 0 7 3 8

Recommended Arrester

Type CA-23RS

Manufacturer

Frequency range

VSWR

Loss

Withstand power

Discharge breakdown voltage

DAI-ICHI DENPA KOGYO CO., LTD.

DC – 2500MHz

No more than 1.1

No more than 0.2dB

200W PEP

DC 230V ±15%

Impulse wave discharge voltage 1,000V

Impulse wave current endurance 6,000A

Impulse wave repetitive discharge endurance (1×40)

µs, 500A, at least 500 times

Insulation resistance at 100Vdc

Connector

Dimensions

At least 10,000MΩ

N-J / N-J

78(W)×48(H)×20(D)mm

Weight 113g

N-J CONNECTOR

EARTH CABLE

φ2.5 – φ3.2

CA－23RS

Outline of Arrester

 29 

6 F 2 S 0 7 3 8

 30 

Appendix D

Supplement

6 F 2 S 0 7 3 8

 31 

6 F 2 S 0 7 3 8

1. Time Signal Transmission Format

The time signal format is shown below, consisting of 4,800bps serial data indicating the time, and 1PPS timing signal indicating the instant of time corresponding to the serial data.

1PPS timing signal

Serial data

4800bps

Signal for next second

Signal code format:

Output data:

ASCII codes based on NMEA-0183 data

GPtps data (time and 1PPS flag)

GPtst data (self-test result)

The GPS week number sent from the satellite returns to 0 (i.e., rollover) every 19.6 years; therefore, the GPS receiver unit cannot output the date data correctly. This is the rollover problem. To solve this problem, the GPS receiver unit provides a DIP switch.

- When the DIP switch 4 is set to OFF and the power is ON, the GPS receiver unit starts outputting the date and time from any date between April in 2001 and September in

2020.

- When the DIP switch 4 is set to ON and the power is ON, the GPS receiver unit starts outputting the date and time from any date between October in 2019 and March in 2039.

The default setting of the DIP switch 4 is OFF. After 2020, the DIP switch 4 should be set ON so that the GPS unit outputs the date data correctly.

Note 1: The date and time data from the GPS receiver unit are used for the recording data of

GRL100 relay and do not influence the function of GRL100 relay. The 1 PPS signal is output independently of the switch 4 setting.

Note 2: For one year from October, 2019 to September, 2020, any setting of the DIP switch 4 is allowed. So, in this term, the changing of the DIP switch 4 is recommended.

3 High-reliability Mode and TRAIM Function

TRAIM (Time Receiver Autonomous Integrity Monitoring) is a function which allows the unit to detect an error in the signal from a satellite. For operation of this function, it is necessary to receive one additional signal to the minimum number normally required for output of the 1PPS

 32 

6 F 2 S 0 7 3 8 pulse. If the necessary number of satellites are available then the unit carries out error detection and removal of erroneous signals. In the event of two or more satellites in error, the operation is not assured.

In high-reliability mode, the receiver will only output the 1PPS signal when no TRAIM alarm occurs. If any satellite is in error then it must be excluded, and so two or more satellites are required for the purpose of outputting 1PPS.

Satellite alignment is subject to strict limits for operation of the TRAIM function. The antenna must be located with a wide field of view.

4. Conditions for Receiving Electric Waves from Satellites

Signals from satellites at an elevation angle of less than 5 degrees are too weak to be received.

In terms of the impact of weather, satellite signals can be received correctly while it is raining or lightly snowing, or while a small amount of snow is piled on the antenna; however, during lightening or heavy snow, the receive status may deteriorate temporarily.

 33 

1.4

1.5