Meinberg GPS180 User manual

MANUAL
GPS180
GPS Satellite Receiver
8th November 2017
Meinberg Radio Clocks GmbH & Co. KG

Table of Contents
1 Imprint 1
2 Safety Instructions for Building-in Equipment 2
2.1 Used Symbols ................................................. 3
3 General Information GPS 4
4 The Modular System GPS180 5
5 GPS180 Features 6
5.1 Time Zone and Daylight Saving ...................................... 6
5.2 Pulse and Frequency Outputs ....................................... 7
5.3 Time Capture Inputs ............................................. 7
5.4 Asynchronous Serial Ports (optional 4x COM) .............................. 7
5.5 Programmable pulse (optional) ....................................... 7
5.6 Time Code (Option) ............................................. 8
5.6.1 Abstract of Time Code ....................................... 8
5.6.2 Block Diagram Time Code ..................................... 9
5.6.3 IRIG Standard Format ....................................... 10
5.6.4 AFNOR Standard Format ..................................... 11
5.6.5 Assignment of CF Segment in IEEE1344 Code ......................... 12
5.6.6 Generated Time Codes ....................................... 13
5.6.7 Selection of Generated Time Code ................................ 14
5.6.8 Outputs ................................................ 14
5.6.9 Technical Data ............................................ 14
6 Installation 15
6.1 Power Supply ................................................. 15
6.2 Mounting the GPS Antenna ........................................ 15
6.2.1 Example: ............................................... 15
6.2.2 Antenna Assembly with Surge Voltage Protection ....................... 16
6.2.3 Antenna Short-Circuit ........................................ 17
6.2.4 Technical Specifications GPS Antenna .............................. 18
6.3 Powering Up the System .......................................... 19
7 The Front Panel Layout 20
7.1 FAIL / LOCK LED .............................................. 20
7.2 LC Display .................................................. 20
7.3 MENU Key .................................................. 21
7.4 CLR/ACK Key ................................................. 21
7.5 NEXT Key ................................................... 21
7.6 INC Key .................................................... 21
8 The Menus in Detail 22
8.1 Root Menu ................................................... 22
8.2 Menu RECEIVER POS. ........................................... 23
8.3 Menu SV CONSTELLATION ........................................ 24
8.4 Menu SV POSITION ............................................ 24
8.5 Menu USER CAPTURE ........................................... 24
8.6 Menu LOG EVENT ............................................. 25
8.7 Menu SETUP ................................................. 26
8.7.1 SETUP FREQUENCY OUTPUT ................................. 26
8.7.2 SETUP ENABLE OUTPUTS ................................... 27
8.7.3 SETUP TIME ZONE ........................................ 27
0

8.7.4 SETUP IP CFG SETINGS (XPORT) ............................... 27
8.7.5 SETUP DAYLIGHT SAV ON/OFF ................................ 28
8.7.6 SETUP SERIAL PORT PARM .................................. 29
8.7.7 SETUP SERIAL STRING TYPE ................................. 29
8.7.8 SETUP SERIAL STRING MODE ................................. 30
8.7.9 SETUP POUT X (optional) .................................... 31
8.7.10 SETUP TIME CODE SETTINGS (optional) .......................... 34
8.7.11 SETUP INITIAL POSITION .................................... 34
8.7.12 SETUP INITIAL TIME ....................................... 34
8.7.13 INIT USER PARMS ......................................... 35
8.7.14 INIT GPS PARMS ......................................... 35
8.7.15 FORCE BOOT MODE ....................................... 35
8.7.16 ANTENNA CABLE ......................................... 35
8.8 Resetting Factory Defaults ......................................... 36
9 Menu Quick GPS180 Reference 37
10 Firmware Updates 38
11 Skilled/Service-Personnel only: Replacing the Lithium Battery 39
12 Technical Specifications GPS180 40
12.1 Time Strings .................................................. 44
12.1.1 Format of the Meinberg Standard Time String ......................... 44
12.1.2 Format of the Meinberg GPS Time String ............................ 45
12.1.3 Format of the Meinberg Capture String ............................. 46
12.1.4 Format of the SAT Time String .................................. 47
12.1.5 Format of the Uni Erlangen String (NTP) ............................ 48
12.1.6 Format of the NMEA 0183 String (RMC) ............................ 50
12.1.7 Format of the NMEA 0183 String (GGA) ............................ 51
12.1.8 Format of the NMEA 0183 String (ZDA) ............................. 52
12.1.9 Format of the ABB SPA Time String ............................... 53
12.1.10 Format of the Computime Time String .............................. 54
12.1.11 Format of the RACAL standard Time String ........................... 55
12.1.12 Format of the SYSPLEX-1 Time String ............................. 56
12.1.13 Format of the ION Time String .................................. 57
Date: 8th November 2017 GPS180

1 Imprint
1 Imprint
Meinberg Funkuhren GmbH & Co. KG
Lange Wand 9, 31812 Bad Pyrmont / Germany
Phone: + 49 (0) 52 81 / 93 09 - 0
Fax: + 49 (0) 52 81 / 93 09 - 30
Internet: http://www.meinberg.de
Mail: [email protected]
Date: 2014-12-12
GPS180 Date: 8th November 2017 1

2 Safety Instructions for Building-in Equipment
This building-in equipment has been designed and tested in accordance with the requirements of Standard
IEC60950-1 "Safety of Information Technology Equipment, including Electrical Business Equipment".
During installation of the building-in equipment in an end application (i.e. rack) additional requirements
in accordance with Standard IEC60950-1 have to be taken into account.
•The building-in equipment is a class 1 - equipment and must be connected to an earthed outlet
(TN Power System).
•The building-in equipment has been evaluated for use in office environment (pollution degree 2) and
may be only used in this environment. For use in rooms with a higher pollution degree more stringent
requirements are applicable.
•The building-in equipment may not be opened.
•Protection against fire must be assured in the end application.
•The ventilation opening may not be covered.
•The equipment/building-in equipment was evaluated for use in a maximum ambient temperature of 50◦C
(40 ◦C by using Rubidium).
•For safe operation the building-in equipment must be protected by max 16 A fuse in the power installation
system.
•Disconnection of the equipment from mains is done by pulling the mains plug.
2 Date: 8th November 2017 GPS180

2 Safety Instructions for Building-in Equipment
2.1 Used Symbols
Nr. Symbol Beschreibung / Description
1
IEC 60417-5031
Gleichstrom /
Direct current
2
IEC 60417-5032
Wechselstrom /
Alternating current
3
IEC 60417-5017
Erdungsanschluss /
Earth (ground) Terminal
4
IEC 60417-5019
Schutzleiterklemme /
Protective Conductor Terminal
5
Vorsicht, Risiko eines elektrischen Schlages /
Caution, possibility of electric shock
6
ISO 7000-0434
Vorsicht, Risiko einer Gefahr /
Caution, Danger
7
2002/96/EC
Dieses Produkt fällt unter die B2B Kategorie. Zur Entsorgung
muss es an den Hersteller übergeben werden.
This product is handled as a B2B category product. In order to
secure a WEEE compliant waste disposal it has to be returned
to the manufacturer.
CE label
This device follows the provisions
of the directives 93/68/EEC
GPS180 Date: 8th November 2017 3

3 General Information GPS
The satellite receiver clock GPS180 has been designed to provide extremly precise time to its user. The clock
has been developed for applications where conventional radio controlled clocks can´t meet the growing require-
ments in precision. High precision available 24 hours a day around the whole world is the main feature of this
system which receives its information from the satellites of the Global Positioning System.
The Global Positioning System (GPS) is a satellite-based radio-positioning, navigation, and time-transfer
system. It was installed by the United States Departement of Defense and provides two levels of accuracy: The
Standard Positioning Service (SPS) and the Precise Positioning Service (PPS). While PPS is encrypted and
only available for authorized (military) users, SPS has been made available to the general public.
GPS is based on accurately measuring the propagation time of signals transmitted from satellites to the user´s
receiver. A nominal constellation of 24 satellites together with several active spares in six orbital planes 20000
km over ground provides a minimum of four satellites to be in view 24 hours a day at every point of the globe.
Four satellites need to be received simultaneously if both receiver position (x, y, z) and receiver clock offset from
GPS system time must be computed. All the satellites are monitored by control stations which determine the
exact orbit parameters as well as the clock offset of the satellites´ on-board atomic clocks. These parameters
are uploaded to the satellites and become part of a navigation message which is retransmitted by the satellites
in order to pass that information to the user´s receiver.
The high precision orbit parameters of a satellite are called ephemeris parameters whereas a reduced pre-
cision subset of the ephemeris parameters is called a satellite´s almanac. While ephemeris parameters must
be evaluated to compute the receiver´s position and clock offset, almanac parameters are used to check which
satellites are in view from a given receiver position at a given time. Each satellite transmits its own set of
ephemeris parameters and almanac parameters of all existing satellites.
4 Date: 8th November 2017 GPS180

4 The Modular System GPS180
4 The Modular System GPS180
The satellite controlled clock GPS180 is ready to operate and can be installed in a metal 19" Modular chassis.
The interfaces provided by GPS180 are accessible via connectors in the rear panel of the case.
GPS
satellite controlled clock
NEXT INC
CLR
ACK
MENU
FAIL LOCK
NORMAL OPERATION
Mon , dd.mm.yyyy
UTC 12: 00 : 00 O
278 , 5 Hz + 93 , 0
GPS180 (front/rear view basic configuration GPS180)
GPS180 Date: 8th November 2017 5

5 GPS180 Features
The GPS180 hardware is a 100mm x 160mm microprocessor board. The 105mm wide front panel integrates a 4 x
16 character LC display, two LED indicators and 4 push buttons. The receiver is connected to the antenna/con-
verter unit by a 50? coaxial cable (refer to "Mounting the Antenna"). The antenna/converter unit is powered (DC
insulation 1000VDC) via the antenna cable. As an option, an antenna splitter for up to four receivers connected
to one antenna is available.
GPS180 is using the "Standard Positioning Service" SPS. The navigation message coming in from the satellites
is decoded by GPS180´s microprocessor in order to track the GPS system time. Compensation of the RF
signal´s propagation delay is done by automatical determination of the receiver´s position on the globe. A
correction value computed from the satellites´ navigation messages increases the accuracy of the board´s oven
controlled master oscillator (OCXO) and automatically compensates the OCXO´s aging. The last recent value
is restored from the battery buffered memory at power-up.
The GPS180 provides different optional outputs, e.g. three progammable pulse outputs, modulated/unmodu-
lated time code output, and up to a total of four RS232 COM ports. Additionally, you can order the GPS180
with different OCXOs (e.g. OCXO-LQ / MQ / HQ / DHQ or an external Rubidium) to match the required
accuracy.
The hard- and software configuration of the clock is displayed if the NEXT key is pressed two times from
the root menu (only GPS180/LCD).
5.1 Time Zone and Daylight Saving
GPS system time differs from the universal time scale (UTC) by the number of leap seconds which have been
inserted into the UTC time scale since GPS was initiated in 1980. The current number of leap seconds is part of
the navigation message supplied by the satellites, so the internal real time of the GPS180 is based on UTC time
scale. Conversion to local time and annual daylight saving time can be done by the receiver’s microprocessor
if the corresponding parameters are set up by the user.
6 Date: 8th November 2017 GPS180