Point2point fibre optic links

Point2point fibre optic links

Description

Point2point fibre optic links

point2point links are fixed gain, analogue signal transmission systems – solving electrical interference and signal attenuation problems in signal monitoring and distribution. Depending on the frequency range, point2point links use either intensity modulation or 14-bit digital modulation to convert analogue signals for transmission over fibre.

  • High performance analogue system
  • Solves the problem of electrical interference
  • High voltage isolation

Frequency ranges:

  • G series – 40 Hz to 250 MHz
  • K series – 2 kHz to 1.35 GHz
  • P series – 1 MHz to 2 GHz
  • S series – 10 MHz to 3 GHz
  • R series – DC to 2.5 MHz
  • T series – DC to 20 MHz
  • U series – DC to 40 MHz

Key Features
  • Wide, flat frequency response
  • Electrically shielded modules
  • All modulation formats
  • Wide dynamic range
  • Flat bandpass response
  • Single mode or multimode
  • Up to 36 hours battery life
Key Benefits
  • Immunity to electrical interference
  • Very long path lengths
  • Negligible degradation of signal-to-noise
  • Safe transmission path for monitoring at hazardous voltages
  • Immunity to electromagnetic fields
  • Elimination of ground loops

Key Standards

point2point supports standards testing for EMC, EMP, HIRF, NEMP etc., including key standards such as:

  • MIL-STD-188-125
  • MIL-STD-461G
  • DEF STAN 59-188
  • DEF STAN 59-411.

 

Specifications for AC coupled links

AC Coupled LinksG seriesK seriesP seriesS series
Passband40 Hz to 250 MHz2 kHz to 1.35 GHz1 MHz to 2 GHz10 MHz to 3 GHz
Gain Flatness (typical)±0.5 dB
(100 Hz-250 MHz)
±0.5 dB
(10 kHz-1.35 GHz)
±0.5 dB±0.75 dB
Gain Flatness (max.)±3 dB±3 dB±1.5 dB±1.5 dB
Phase Flatness> 100 Hz : ±20 °> 5 kHz : ±20 °±20 °
(typ.±5 ° for 1 MHz to 1.5 GHz)
±20 °
(typ. ±5 ° for 1 MHz to 1.5 GHz)
Rise Time<1.4 nS<350 pS<250 pS<200 pS
Noise Figure (typical)< 24 dB (22 dB)
@ 100 MHz
< 25 dB (22 dB)
@ 500 MHz
<25 dB (24 dB) @ 500 MHz,
< 30 dB @ 2 GHz
< 26 dB (24 dB) @ 500 MHz,
< 30 dB @ 3 GHz
Signal Latency (1 m Fibre)10 nS
Transmitter Input Impedence (VSWR)50 W (<1.5:1)
Reciever Output Impedence (VSWR)50 W (<1.5:1)
Input P1 db>0 dBm @ 100 MHz>0 dBm @ 500 MHz>0 dBm @ 500 MHz>0 dBm @ 500 MHz
Input IP3>10 dBm@ 100 MHz>10 dBm @ 500 MHz>10 dBm @ 500 MHz>10 dBm @ 500 MHz
Signal InversionInverting
Operating Temperature-10 to +40 °C
Optical Path Length<1 m to ~4 km
Optical Budget-3 dB will turn status LED red/green on RX module, -10 dB will turn status LED red on RX module
Electrical ConnectorsSMA Female 50 W
Optical ConnectorsSinglemode: FC/APC Narrow Key
Current Consumption @ 12 V<250 mA for Transmitter Module, <150 mA for Receiver Module
Front Panel Indication: Transmitter ModulePower supply status & transmitter active
Front Panel Indication: Receiver ModulePower supply status & received light level

Specifications - DC coupled links

DC Coupled LinksR seriesT seriesU series
Pass band0 Hz-2.5 MHz0 Hz-20 MHz0 Hz-40 MHz
Gain Flatness+/-0.5 dB to 1 MHz+/-0.25 dB to 2 MHz+/-0.25 dB to 10 MHz
+/-1 dB to 2 MHz+/-1 dB to 15 MHz+/-1 dB to 30 MHz
+/-3 dB to 2.5 MHz+/-3 dB to 20 MHz+/-3 dB to 40 MHz
Phase flatness<±10 °
Rise time<135 ns<20.5 ns<10.3 ns
Output Noise... (Full Band, all values are Vrms)
...For +/-2V output0.3 mV (0.02 % FS)0.8 mV (0.06 % FS)0.7 mV (0.05 % FS)
...For +/-10V output1.5 mV (0.02 % FS)N/AN/A
Signal latency (1M fibre)350 ns280 ns210 ns
Transmitter input impedance1 MΩ / 25 pF typ.
Receiver output impedance50 Ω @ ±2 V standard
300 Ω @ ±10 V optional (2.5 MHz limited)
Output DC offset (worst case over whole output range)<0.3 % of FSD<0.3 % of FSD<0.3 % of FSD
Non-linearity0.1 % of FSD0.1 % of FSD0.06 % of FSD
Operating temperature-20 to +60 °C
Optical path length (singlemode)<1 m to 10 km
Electrical ConnectorsBNC 50 Ω
Optical ConnectorsSinglemode: FC/APC
Current Consumption @ 12V: TX<240 mA<240mA<210mA
Current Consumption @ 12V: RX<350 mA<315mA<280mA
Front Panel Indication: Transmitter ModulePower supply status & ADC overflow
Front Panel Indication: Receiver ModulePower supply status & Link Lock status

Specifications quoted at 25°

Datasheets and Brochure

DC fibre optic link datasheet

DC fibre optic link datasheet

AC fibre optic link datasheet

AC fibre optic link datasheet

Point2point RF over fibre links accessories datasheet

point2point RF over fibre links accessories datasheet – Updated 04/03/21

DC fibre optic link datasheet

point2point Brochure