The system 6855 is a DCF77-based time server system. This means that the system is synchronized to local time (standard time with ST/WT conversion, if needed). The 6855 Time Server System is available in a 3U version as well as a 1U Slim Line version. Both offer extensive modularity that allows customized solutions to be realized with the 6855 DCF77 system. The system can be developed using functional boards, added by the customer. So, its performance can be easily upgraded on the site at low cost. Performance panels can also be replaced directly on site.

The hopf signal converter 4800 series for 35 mm rail mounting (EN 50 022) is a low-cost solution for the distribution/conversion of a variety of electrical and optical signals. You can choose DC or AC power supply units for the signal converter4800. The converter can convert RS422, RS232 and RS485 signals to fiber, and vice versa, or to each other. This module is widely used to transmit time server information over long distances with the help of multimode fiber optic and IRIG-B protocol. After transmission by fiber, you can convert it to IRIG-B protocols.

If you choose to install only one GPS antenna (for structural or other reasons), you can set up two GPS receivers with a common GPS antenna using the 4443 Passive GPS Antenna Splitter. The time server system supplies the voltage of the Power Splitter 4443 through the GPS antenna cable of hopf GPS receivers. No external power supply is required to operate the program. If at least one of the connected GPS receivers provides the correct supply voltage through the antenna cable, and all connected components work in accordance with the main GPS L1 antenna signal, the GPS 4443 antenna splitter can be used together with another time server correctly.

If you want to install only one GPS antenna to work with multiple GPS receivers (for structural or other reasons), you can connect up to 8 GPS receivers with a common GPS antenna by using the Active GPS Antenna Splitter 4449.  This is often used in performing device tests in laboratories or test stations. Active GPS antenna splitter 4449 has 8 outputs and a GPS signal amplifier for time server technologies. The power of this splitter is provided by two ways, either by devices connected to the time server or by an external power source.

German Hopf 4491 Small GPS Antenna is the integration of a high performance GPS antenna and an advanced low noise amplifier in a very small size (very compact / fully waterproof housing). When connected to a GPS receiver, it boosts the antenna power with a voltage of 5V, provides excellent signal amplification, and an out-of-band filter. The small antenna is suitable for all kinds of German Hopf time servers. It has the ability to remove environmental noise very well.

Power splitter DCF77 4446, 4 ports, active (230V AC): If there are several DCF77 clocks in a building, you can use the 4x antenna amplifier with potential isolation. The structure of the device is the same as the FG444400 antenna amplifier, but without indirect lightning protection. The enclosure contains the main unit and several amplifier modules. The signal is fed through a preamplifier to 4 potential free output, and sent through insulated BNC connectors on the wider side of the enclosure

The large 4985 display consists of a 16x64 LED matrix.  Two lines of 42 mm or one line of alphanumeric characters of 84 mm can be displayed on this matrix. The device can work as a large display for values such as network time, time difference and network frequency that can be transmitted from the hopf 7001 (RC) system with the 7515 (RC) board. The large screen is equipped with a very accurate quartz clock that can be synchronized with the DCF77 signal. The DCF77 signal can be fed through the antenna to the BNC connector or as a pulse to the respective inputs. The large screen generates a DCF77 pulse and can therefore synchronize more devices.

The hopf FO-StarCoupler 4811 for 35 mm DIN rail mounting (DIN EN 50 022) is a low-cost solution for the active distribution of a FO signal to up to 7 FO outputs. All FO-StarCoupler FO components are ST (bayonet) type and designed for multimode cables. Each component of the FO-StarCoupler has its own status LED. The equipment is very widely used to transmit time server signals to several devices at far distances by a master time server device and optical fiber cables; finally, converting them into electrical signals next to each device.

DCF77 4417 / 4418 / 4420 / 4436 / 4437 antennas are all German hopf antennas with active directional capability and an electrical design. Ferrite antennas are used for long wave range frequencies to keep the antennas small. The oscillating circuit in the antenna, which is made of a wire ferrite rod and various capacitors, is set up on 77.5 kHz. DCF77 is a standard for transmitting time (hours, minutes and seconds) and date to clocks and timing devices, and it is transmitted to devices with high accuracy by radio (local transmitter).

The original large display 4985 with NTP protocol consists of a 16x64 LED matrix. Two lines of 42 mm or one line of alphanumeric characters of 84 mm can be displayed on the matrix. The device can work as a large display for values such as network time, time difference and network frequency, which can be transferred from the hopf 7001 (RC) system with the 7515 (RC) board. The large display is equipped with a very accurate quartz clock, and can be synchronized with the DCF77 signal. The display also works with the NTP protocol as a time synchronizer.

System 7001(RC)-GPS is a modular system with integrated GPS receiver. German Hopf master clocks 7001 are produced in the dimensions of 3 rack mount units. The device has a complete display and keyboard. The GPS-based system 7001(RC) is equipped with functional boards to output the required signals according to the customer\'s needs. The number of possible functional boards to integrate and upgrade is primarily determined by the number of slots available in the 19-inch rack and the capacity of the power supply. However, there are a maximum of 14 expandable slots, in which many different protocols and outputs can be embedded.

System 6844(RC)-SUB is a semi-modular SUB-Master system. It is produced in 1 to 3 units based on customer requests. You can benefit from hopf Master/Slave Strin signals, PPS pulse, DCF77 pulse (1Hz), IRIG-B and NTP/SNTP to synchronize the 6844(RC)-SUB system. The device has a screen and a keyboard. By running up to two (2) NTP LAN Board 7273 (RC) or NTP LAN Board(s) 7274 (RC), the 6844SUB system becomes a highly accurate NTP Stratum 1 time server for synchronizing computers and industrial networks.