Name: 1 GPS Fiber Transport System
Brand: Thorbroadcast
Price: 1495 USD
Availability: InStock

Description

Portable single GPS timing over Fiber

The Thor Fiber portable F-1GPS-TX/RX systems are available to support the remote location of industrial GPS antennas. These kits are assembled and tuned to the unique requirements of each application. Thor GPS over fiber systems are an excellent solution for distance limitation between maritime or government GPS antennas and radio signal receiver equipment. Typically any sensor equipment or tuning hardware such as universal time receivers or GPS navigation gear must be installed and located within 100 ft of the antenna system. Most modern industrial type systems require antennas with a clear view of the horizon to function properly. In the case of large ocean going vessels, underground military installations, or large buildings or structures(metropolis); it can be a challenge to install GPS equipment within 100 ft of a suitable antenna location. Thor solves this problem by extending the distance to over 20km by converting the GPS signal from the antenna’s coax to fiber optic cable. F-GPS systems are available in a variety of form factors, and can be custom tuned to individual users applications.

GPS reference timing signals are widely used to synchronize cellular base stations.

GPS systems typically consist of an active rooftop antenna, a GPS receiver and a length of coaxial cable to connect them. Common challenges arise when the distance between the rooftop antenna and the cellular base station equipment (usually in the basement) is greater than 300 ft. Coaxial cable runs over 300 ft are not practical for most GPS receiver systems, so a fiber optic link is required at such distances, and Thor Fiber optic links are some of the most trusted, cost-effective links in the industry.

Tags: GPS over fiber

Features

Supports all GPS frequencies internationally
Supports L1 at 1575.42 MHz, L2 at 1227.60 MHz, and L5 at 1176.45 MHz GPS bands
Extends the range between GPS antennas and equipment to over 20 miles
Fiber links are immune to RF interference problems associated with coax
Ideal for broadcasting towers, cell sites, military installations, and large ships
Provides a fiber security break and insulates from lightning strikes
1 GPS input
1 Independent fiber optic ouput SC/APC
N Female Type RF Connetor
Portable power supply
Supports high level of optical split and RF split for flexible routing of GPS for small cells and extended base station sites
Simple to install – no adjustment
Minimal signal loss and degradation over very long cable runs upto 20km.
Provides a highly secure tamper-proof GPS over fiberconnection between antenna and receiver.
Interference free link through noisy environments, the optical signal is unaffected by electical noise.
Electrical isolation between antenna and recever protects against lightning strikes and electrical surge
Selectable GPS antenna powering voltage
Supports all L2 & L1& L5 GPS bands
The transmitter receiver Kit comes with 110-220V AC to DC power supply

GPS base stations with long antenna cable runs
Run the GPS carrier to multiple GPS timing boards throughout a company
Run GPS throughout an aircraft
Satisfies the requirement of supplying multiple GPS receivers with a carrier, spread over a great distance
For R&D facilities, supplies a GPS carrier to a multitude of engineers and technicians with only one antenna on the roof.
DAS, WiMax, Satcom, LTE over fiber

IMPORTANT NOTE*** (it is very important to interface our unit with SC/APC - Angle Polished Connector to avoid any light reflections.

If your fiber is terminated with the SC, ST, FC /PC flat connector, you need to use an optical jumper from PC type to SC/APC for proper conversion.

Drawings

Model Selection

F-1GPS-TX/RX - 1GPS over fiber Transmitter/Receiver kit (both ends) - 1mW laser (20km distance)

F-1GPS-TX - 1GPS over fiber Transmitter only - 1mW laser - 0dBm optical output power (20km distance)

F-1GPS-RX - 1GPS over fiber Receiver only

F-1GPS-TX-10mW - 1GPS over fiber Transmitter only - 10mW laser +10dBm optical output power

Specification

All Specifiactions Subject to Change Without Notice IMPORTANT NOTE (it is very important to interface our unit with SC/APC - Angle Polished Connector to avoid any light reflections. If your fiber is terminated with the SC, ST, FC /PC flat connector, you need to use an optical jumper from PC type to SC/APC for proper conversion.
Electro Optical Characteristics
Optical Output Optical output Power Receiver Sensitivity Optical budget	1 mW min. (F-1GPS-TX - 1GPS over fiber Transmitter only - 1mW laser - 0dBm optical output power (20km distance) (0-+3)dBm -10dBm 10db (* F-1GPS-TX-10mW** - 1GPS over fiber Transmitter only - 10mW laser +10dBm optical output power)
Wavelength	1310 nm, (1550nm or CWDM special order only)
RF Characteristics
Frequency Range	1100 – 1585.42 MHz
CNR	60dB
Input VSWR (50 Ohm)	2.0:1 max
MW/ma@1200Mhz	0.1mW/ma min
1dB Compression	-25 dBm
Power Power to the Antena	12VDC, 1.5A AC to DC power supply - Incuded ( F-Type Female) 5V DV (ON/OFF switch)
Physical Characteristics
Dimensions	Height 1.2 Width 3.5 Length 5
Link Characteristics
Link Loss	15 dB typical
Carrier/Noise (30khz BW)	15 dB min with input drive level at 70 dBm
3rd Order Intercept	22dBm
Environmental Conditions
Operating Temperature	-25 to +70 (deg C)
Storage Temperature	-30 to +75 (deg C)
Mechanical
Optical Connectors Electrical Connector	SC/APC Fiber S/M 9/125 N type Female

Question and Answers

Question:
It looks like the fiber used is Single Mode but need to confirm this?

Answer:
Yes our GPS over Fiber units all use Singlemode fiber; they do not work on Mulitmode. We have multiple options for the GPS units. As well as having a multi channel unit up to 4 GPS inputs. All of these units will only work on Singlemode Fiber only.

Question:

I want to confirm whether this will work with a Trimble Thunderbolt E GPS Disciplined Clock Starter Kit (62989-50).

Answer:

There is no reason why it shouldn't, our units are wideband and
totally transparent. v

Question:

What is the GPS frequencies, and how to send GPS it over fiber

Answer:

GPS (Global Positioning System) is a satellite-based navigation system that allows users to determine their precise location, speed, and time anywhere on Earth. GPS signals are transmitted from a network of satellites orbiting the Earth, and can be received by GPS receivers on the ground or in aircraft, ships, and other vehicles.

GPS frequencies are within the L-band range of the radio frequency spectrum, specifically within the 1575.42 MHz frequency band. These signals are very weak, with an average power of just -160 dBm (decibel-milliwatts), and are susceptible to interference and signal loss over long distances.

To send GPS signals over fiber optic cables, a GPS modulator and a fiber optic transmitter are used. The GPS modulator converts the GPS signals into a format that can be transmitted over fiber optic cables, while the fiber optic transmitter sends the signals over the fiber optic cables to the desired location.

There are several types of fiber optic transmitters that can be used to send GPS signals over fiber, including both analog and digital transmitters. The choice of transmitter will depend on the specific requirements of the application, including the distance that the signal needs to be transmitted, the type of fiber optic cable being used, and the data rate of the signal.

It is also important to note that GPS signals are susceptible to interference and signal loss over long distances, so it may be necessary to use amplifiers or repeaters to boost the signal along the way. This is particularly important when transmitting GPS signals over long distances, as the signals can become degraded due to factors such as atmospheric conditions and other sources of interference.

In addition to being used for navigation and location-based services, GPS signals are also used in a wide range of applications, including surveying, mapping, timing, and scientific research. The ability to transmit GPS signals over fiber optic cables enables a wide range of possibilities for these applications, including the ability to transmit GPS signals to remote locations that may not be accessible by other means.

Fiber optic cables are a reliable and efficient means of transmitting GPS signals over long distances. They offer several advantages over traditional copper cables, including higher bandwidth, higher data rates, and immunity to electromagnetic interference. They are also more resistant to physical damage and are less susceptible to corrosion.

To transmit GPS signals over fiber optic cables, the signals must be converted into a format that is compatible with fiber optic transmission. This is typically done using a GPS modulator, which converts the GPS signals into an optical format that can be transmitted over fiber optic cables.

There are several types of GPS modulators available, including both analog and digital modulators. Analog modulators use continuous wave (CW) lasers to transmit the GPS signals, while digital modulators use pulse-code modulation (PCM) to transmit the signals in digital form. The choice of modulator will depend on the specific requirements of the application, including the distance that the signal needs to be transmitted and the data rate of the signal.

Once the GPS signals have been modulated, they can be transmitted over fiber optic cables using a fiber optic transmitter. There are several types of fiber optic transmitters available, including both analog and digital transmitters. The choice of transmitter will depend on the specific requirements of the application, including the distance that the signal needs to be transmitted, the type of fiber optic cable being used, and the data rate of the signal.

It is also important to note that GPS signals are susceptible to interference and signal loss over long distances, so it may be necessary to use amplifiers or repeaters to boost the signal along the way. This is particularly important when transmitting GPS signals over long distances, as the signals can become degraded due to factors such

Question:

Attached is the GPS antenna that will be utilized in out system.

This GPS antenna is what we will need your equipment to interface with. This drawing is crude, but how we plan to use:

Overall Diagram

Figure 4: Overall Example Usage

I am also attaching the GPS antenna that we are using.

Will this work for what we are attempting to do?

INNOVATIVE DESIGN WITH MULTIPLE PATENTS
The VEXXIS GNSS-800 series antennas feature a patented multi-point feeding
network and radiation pattern optimization technology. In additional to having
enhanced performance in multipath environments, the GNSS-850 antenna is able
to maintain a low profile while achieving both high peak zenith gain and low gain
roll-off from zenith to horizon, without sacrificing tracking performance. This new
technology significantly enhances the low elevation angle tracking capabilities,
extending operation to the entire GNSS constellation. Furthermore, the antenna is able
to achieve greater phase center stability through our innovative element design. This
directly translates into improved carrier phase measurement and a better RTK solution.
TRACKING IN CHALLENGING ENVIRONMENTS
The ability to track low elevation satellites while maintaining a high gain for higher
elevation satellites makes the GNSS-850 an excellent choice for any applications
where the sky is partially visible, such as operating close to tree lines, under foliage,
or in urban canyons. The antenna is able to track any visible satellites from horizon
to zenith, providing maximum number of observations for an enhanced positioning
solution.
NOVATEL’S TOUGHEST PRECISION ANTENNA
GNSS-800 antennas are the toughest high precision antennas NovAtel has designed
to date, ensuring their survivability even in the harshest operating environments. The
antennas feature ultra-durable watertight enclosures, and have been proven to sustain
intense vibration, earning the MIL-STD-810G rating.

PERFORMANCE
Signal Received
GPS L1, L2, L5
GLONASS L1, L2, L3
Galileo E1, E5a/b, E6
BeiDou B1, B2, B3
L-Band
Pass Band (typical)
Upper passband 1569.0 ± 43.0 MHz
Lower passband 1232.0 ± 68.0 MHz
Out-of-Band Rejection
Band edges ± 50 MHz 40 dB minimum
Band edges ± 100 MHz 60 dB minimum
LNA Gain 29 dB (typical)
Gain at Zenith (90°)1
L1/B1/E1/G1 +5.0 dBic minimum
L2/B2/E5b/G2 +5.0 dBic minimum
L5/E5a +3.0 dBic minimum
L-Band +5.0 dBic minimum
Gain Roll-Off (from Zenith to Horizon)
L1/B1/E1/G1 10 dB
L2/B2/E5b/G2 12 dB
L5/E5a 12 dB
L-Band 10 dB
Phase Center Stability <2.0 mm
Noise Figure <2.0 dB (typical)
VSWR ≤2.0 : 1
L1-L2 Differential Propagation Delay
5 ns (maximum)
Group Delay Ripple <15 ns
Nominal Impedance 50 Ω

1 G1 zenith gain is 4 dBic (typical).
L5 zenith gain is 3 dBic (typical)

Connector TNC female
Input voltage +3.8 to +18.0 VDC
Current 60 mA (maximum)

Answer:

If your signal is GPS, please consider F-GPS-TX/RX, not the L-Band TX/RX.

GPS operates at a very low RF level and requires a 50-ohm termination

Based on the specs of the antenna, it looks like it should work because we are directly modulating incoming RF signals into optical wavelength output. It should be really quick and easy to set up. Just make sure you have single-mode fiber and SC/APC connectors.