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

Point2point fibre optic links

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 of battery life
Key Benefits
– Immunity to electrical interference
– Very long path lengths
– Negligible degradation of signal-to-noise
– A 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
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