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Custom Designed Systems

If a standard, fixed-configuration kit doesn’t provide the coverage you need, we can engineer a solution specifically for your environment.

Why would you need a bespoke design?  Here are some of the aspects that we may have to consider: 

The antenna feeder cable length is longer than the 30M length available in a kit.

RF240 coaxial cable is supplied as standard with all kits; it’s a low-loss, low-noise version of Times Microwave’s LMR240. With this cable we can reach approximately 40 meters from antenna to repeater.

If 40 meters isn’t long enough, we can:

  • Upgrade to a cable that inserts less loss through attenuation, such as RF400
  • Insert a GPS amplifier in the cable run

The repeater system needs to provide coverage in more than one area or room.

We have a range of signal splitters and amplifiers that can be engineered into a solution to provide coverage over a wider area, or multiple areas, within a facility.

We consider parameters such as cable lengths, physical environment, availability of mains power etc, and provide technical drawings to illustrate the proposed solution.

Here’s the largest custom-designed system that I am aware of.

Contact us to discuss your requirements

Example of a custom-designed system

This system covers the interior of a large industrial unit that is divided into a number of separate laboratories where signal is required.

  • The antenna feeder cable is quite long so an amplifier boosts the signal by 16dB.
  • The splitter distributes the incoming signal to up to five repeater units.
  • DC power from one of the repeater units is passed through the coaxial cables to provide power to the amplifier and the antenna.

 

fiverepeaters

 

GPS splitter 1:2GPS splitter 1:5GPS amplifierGPS amplifier/splitter

The GPS splitter unit (1:2) connects the the signal from one external antenna to up to two repeater units.

It is sometimes necessary to use a separate amplifier in conjunction with the splitter to ensure adequate transmission power to all the repeaters – if in doubt call or email FalTech for technical advice.

If the signal is to be transmitted to just one repeater (for example if a second device is to be installed later) the unused port should be fitted with a 50 ohm terminator.

S2 v2

Technical Details

  • Size: 110 x 143 x 28mm
  • Weight: 185g
  • Operating temperature: -35 to +85°C
  • Power supply not required *
  • Frequency Range: 1200-1700MHz
  • Impedance: 50 ohms
  • Connector type: TNC sockets

* The splitter receives power through one of the two output ports.

A DC voltage is emitted by the attached repeater, via the coaxial feeder cable.

The voltage is passed through the splitter to the LNA in the outdoor antenna.

Application example


Waterproof (IP67) GPS splitter unit 1:2

IP67 Splitter 1 to 2 400x300

For environments where moisture and/or dust ingress is a problem, this IP67 version of the splitter is ideal.

The splitter specification is exactly the same as the standard unit shown above, the only differences are as follows:

  • Size: 200 x 119 x 39mm
  • Weight: 241g
  • Enclosure: IP67
  • Input connector: TNC-socket
  • Output connectors: 2 x -4dB TNC socket

Example – using a 1:2 splitter to distribute signal to two repeater units

Signal loss across the device is the same on each port, -4dB.

 

GPS splitter schematic

 

To connect an antenna to more than two repeaters there are other options such as the GPS splitter (1:5) and the combined amplifier/splitter unit (1:3).

With a GPS splitter 1:5, the signal from one external antenna can be distributed to up to five GPS repeater/receiver units.

Supports GPS L1 & L2, GLONASS, Galileo.

  • Sometimes advisable to use a separate amplifier with the splitter to overcome signal losses through attenuation.
  • Upgrading to a lower-loss cable may also be enough – if in doubt call or email FalTech for technical advice.
  • Spare/unused ports should be fitted with a 50 ohm terminator.
  • One port passes DC voltage from repeater to GPS antenna, to provide power for LNA (-4dB signal loss).
  • The other four ports are DC-blocked (-12dB signal loss).

Standard (IP51) non-waterproof GPS splitter 1:5

rogersplitamp

Technical Details

  • Size: 110 x 143 x 28mm
  • Weight: 185g
  • Operating temperature: -25 to +85°C
  • Power supply not required
  • Frequency Range: 1200-1700MHz
  • Impedance: 50O
  • Connector type: TNC sockets

Application example


Waterproof (IP67) GPS splitter unit 1:5

IP67 Splitter 1 to 5 400x300For environments where moisture and/or dust ingress is a problem, this IP67 version of the splitter is ideal.

The splitter specification is exactly the same as the standard unit shown above, the only differences are as follows:

  • Size: 200 x 119 x 39mm
  • Weight: 241g
  • Enclosure: IP67
  • Input connector: TNC-socket
  • Output connectors: TNC socket
  • 1 x -4dB with DC passthrough
  • 4 x -12dB DC blocked

Using a GPS splitter to distribute signal to up to five repeaters/receivers

  • One port inserts -4dB loss with DC passthrough
  • Four ports insert -12dB loss, DC blocked

Splitter S5

 

Other devices in the product range can be combined to create a custom-designed system like the one illustrated above.

GPS splitter 1:2
Combined GPS amplifier/splitter 1:3

An in-line GPS amplifier that allows for longer cable runs between the outdoor GPS antenna and the indoor repeater unit(s).

Signal gain is +16dB across the GNSS band of 1200 to 1700 MHz; supporting GPS L1 and L2, GLONASS and Galileo simultaneously.

A built-in filter removes unwanted signals that may have entered the cable.

The amplifier requires a 5V DC power supply which is fed through the coaxial cable from the attached repeater unit; this DC voltage is also passed on to the outdoor GPS receiving antenna (or in some applications to another GPS line amplifier).

GPS amplifier for L1, L2, GLONASS, Galileo, 16dB gain

Technical Details

  • Size: 110 x 143 x 28mm
  • Weight: 135g
  • Operating temperature: -35 to +85°C
  • Power supply: powered through the coaxial cable from the GPS repeater
  • Frequency Range: 1200 to 1700 MHz
  • Impedance: 50Ω
  • Noise figure: <5dB
  • Gain: +16dB
  • Connector types: both TNC socket

Application example


Waterproof (IP67) 16dB GPS amplifier unit

GPS amplifier, 16dB gain, L1, L2, GLONASS, Galileo, IP67 enclosure

For environments where moisture and/or dust ingress is a problem, this IP67 version of the GPS amplifier is ideal.

The amplifier specification is exactly the same as the standard unit shown above, the only differences are as follows:

  • Size: 200 x 119 x 39mm
  • Weight: 240g
  • Enclosure: IP67
  • Input connector: TNC-socket
  • Output connector: TNC socket


Use cable with lower loss, or use an amplier, or both?

Standard RG58 coaxial cable works well for distances of up to approximately 25 metres from antenna to repeater when using an outdoor antenna with 35dB of signal gain; any longer than this and signal losses through attenuation become significant.

This situation can be overcome by using a cable with a better loss characteristic; generally the thicker the cable the less attenuation is experienced.

FalTech GPS can advise which cable type is most suitable for any situation – just call and let us “do the math”.

We know all the loss characteristics of a wide range of cable types and can calculate whether your situation can be solved simply by deploying low-loss cable, or by the addition of an amplifier, or both.


Using an amplifier to extend antenna cable range

amplifierschematic

The amplifier is often used in conjunction with a signal splitter to allow multiple GPS repeaters to share a single antenna.

GPS splitter 1:2
GPS splitter 1:5
GPS combined amplifier/splitter

 

 

This unit is a combined GPS amplifier/splitter; it has a built-in line amplifier with a gain of 16dB that can transmit a GPS signal to up to three separate GPS repeater/receiver units.

This versatile device can be used in three main configurations:

  1. As a GPS splitter unit (1:3) with the amplifier not used
  2. As a GPS splitter unit (1:3) with the amplifier in circuit
  3. As a line amplifier only with the splitter element un-used

rogersplitamp

Standard non-waterproof (IP51) GPS amplifier/splitter unit

GPS amplifier section

  • Size: 110 x 143 x 28mm
  • Weight: 195g
  • Operating temperature: -35 to +85°C
  • Connectors: 2 x TNC socket
  • Frequency range: 1200 to 1700 MHz
  • Noise figure: <5.0dB
  • Impedance: 50O
  • Gain: +16dB

GPS splitter section

  • Connectors: 1 x TNC socket input; 3 x TNC socket output
  • One output -4dB with DC input from repeater unit
  • Two outputs -12dB, DC blocked, to connect to repeater units
  • Power supply: via output/DC input port from the repeater unit
  • Frequency range: 1200-1700MHz

Application example


Waterproof (IP67) GPS amplifier/splitter unit

Waterproof (IP67) GPS amplifier/splitter unit
For environments where dust and/or moisture ingress is an issue.

The IP67 amp/splitter specification is identical to the standard unit shown above; the only physical differences are as follows:

  • Size: 200 x 119 x 39mm
  • Weight: 243g
  • Enclosure: IP67

 


 

GPS amplifier/splitter

 

Other components in the range can be combined with the amplifier/splitter to create a custom-designed system.

GPS splitter 1:2
GPS splitter 1:5

 

 

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