Receiving antennas for time synchronisation
Receiving antennas for time synchronisation
GPS antenna and radio antenna
Our GPS antennas and radio antennas (ALS 162/DCF) are intended to synchronise slave clocks, master clocks, and time servers. The time code includes minute, hour, day, and date information as well as the synchronisation signal. This code automatically manages summer/winter time changeovers and guarantees absolute precision.
GPS antenna or radio antenna?
Advantages of the GPS antenna:
- Provides worldwide coverage
- Guarantees stability and precision of the time signal
- Synchronises our clocks, master clocks, and time servers
Advantages of the radio antenna:
- Facilitates installation thanks to an antenna positioned inside the building
- More economical than the GPS antenna
Our GPS antennas
The GPS antenna provides time synchronisation throughout the world thanks to a network of 24 satellites.
Bodet offers three types of GPS antennas: GPS antenna, Prog GPS-DCF antenna, and UTC GPS-DCF antenna. The GPS-DCF antenna can synchronise products that have no GPS antenna input but have a radio antenna (DCF) input.
Rollover immunity: the GPS module and the integrated electronics ensure reliability and precision over time.
GPS antenna
Time Zone
UTC
Output
RS485
Operating temperature
-30 to +70°C
Protection index
IP65, IK04
Prog GPS-DCF antenna
Time Zone
customisable to order
Output
current loop 4-20mA
Operating temperature
-30 to +70°C
Protection index
IP65, IK04
Our radio antennas
Our range of radio antennas is available in two models: FI antenna and DCF antenna.
- The ALS 162 antenna captures time signals transmitted by the transmitter in Allouis, France. The signals are received throughout Europe and in North Africa.
- The DCF antenna captures time signals transmitted by the DCF 77 transmitter in Mainflingen, Germany. The signals are received in continental Europe.
ALS 162 antenna
Synchronisation
ALS 162 (162 KHz receiver)
Power
8-20VDC
Operating temperature
-20 à +50°C
Protection index
IP53, IK04
DCF antenna
Synchronisation
DCF (77.5 KHz receiver)
Power
8-20VDC
Operating temperature
-20 à +50°C
Protection index
IP53, IK04
GPS rollover phenomenon
What is GPS rollover?
The GPS date in a GPS module is calculated on a "week number" database sent by the GPS satellites.
The "week number" represents the number of weeks since 6 January 1980 (origin of GPS time). This data allows a GPS module to calculate its UTC calendar. The "week number" is encoded in 10 bits, which represents a maximum of 1,024 weeks. Every 19.6* years, rollover is inevitable.
* 19,6 = 1024/52
What are the impacts on your products?
Certain Bodet products (such as the Sigma master clock) will be affected and will no longer have the correct date. Rollover will cause disturbances on time and season changeovers.
When will I be affected by rollover?
You have a Bodet GPS antenna with one of the following references:
- 907030 ANTENNE GPS AV SUPPORT ROTULE
- 907032 ANTENNE GPS SANS SUPPORT 20M
- 907033 ANT GPS + CONNECTEUR SS SUP.10M
- 907035 ANTENNE GPS 2 AVEC CABLE 20M
- 907036 ANT GPS 4 BOIT. NOIR + CABLE 2M
- 907037 ANT GPS 4 AVEC CABLE 20M
- 907042 ANT GPS 5 AVEC CABLE 20M
Your order is before 31/08/2015
- Rollover date: October 2018
- You can order our new GPS antenna: 907047 ANTENNE GPS 6 CABLE 20M.
Your order is after 01/09/2015
- Rollover date: August 2030
- Case 1
You can keep your antenna, but you will need to add our Rollover interface by ordering the reference: 408203 INTERFACE ROLLOVER GPS.
Case 2
You can order our new GPS antenna: 907047 ANTENNE GPS 6 CABLE 20M.
You have a GPS-DCF antenna with one of the following references:
- 907038 ANT GPS-DCF PROG CABLE 20M
- 907039 ANT GPS-DCF UTC CABLE 20M
Your order is before 31/12/2015
- Rollover date: April 2019
- Case 1
You can order our new GPS-DCF antenna: 907048 ANTENNE GPS-DCF 6 PROG.
Case 2
You can order our new GPS/DCF antenna: 907049 ANTENNE GPS-DCF 6 UTC.
Your order is between 01/01/2016 and 31/10/2017
- Rollover date: April 2019
- Because our antennas will be under warranty when the problem occurs, Bodet will send the new GPS-DCF antenna to you. To receive it, please contact our sales department.
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