J730 single-channel compact fiberoptic-to-electrical converter

Fiberoptic-to-Electrical Converter - J730
  • Compact logic-level optical signal link receiver
  • Allows transport of logic levels and fast triggers over long distances in high EMI environments
  • Fast electrical rise times
  • Below 12 picoseconds typical RMS link jitter
  • J730-1 and J730-11 use commonly-available 62/125 micron multimode ST or FC connectorized fiber at 850 nanometers
  • J730-3, J730-5, J730-13, and J730-15 use singlemode or multimode ST or FC connectorized fiber at 1310 or 1550 nanometers
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It has always been difficult to transport fast logic signals long distances over copper conductors. Coaxial or twisted-pair transmission lines introduce attenuation, dispersion, ground loops, and provide an entrance point for external electrical noise. The result can be jitter, pulse width distortion, and ultimately logic errors.

A J720/J730 combination can transport logic level or critical timing triggers over kilometer distances in high EMI environments with link jitter typically below 12 picoseconds RMS. The J730 provides a digital logic output with risetime below 750 picoseconds, and a fast analog (180 MHz bandwidth) output is also provided for monitoring link integrity.

The J730 is compatible with the Highland J720 and J724 E/O Converters, the P400 Digital Delay/Pulse Generator, the company's VME-packaged electrical/optical converter products, and its other VME modules with optical I/O.

FUNCTION Single-channel optical-to-electrical converter
INPUT DC coupled fiberoptic input, ST or FC connector
850, 1310, or 1550 nm wavelength
1 mW nominal optical fiber power
Threshold adjustable 100 µW to 800 µW, factory set to 300 µW
See manual section 6 for versions
PROPAGATION DELAY Light in to electrical out < 10 ns
OUTPUTS Digital: +5 volts typ, 2.25 V typ into 50 Ω load
Analog: +1 volt per mW optical input into 50 Ω load
Source impedance: 50 Ω Optional high drive available
BANDWIDTH DC to 180 MHz
RISETIME Digital output: < 750 ps
Analog output: < 2.5 ns
JITTER < 12 ps RMS, J720 + J730
OPERATING TEMPERATURE 0 to 60°C
CALIBRATION INTERVAL One year
POWER +12 volts at 60 mA nominal
J12 Universal Wall-Plug Adapter recommended
CONNECTORS ST or FC optical input receptacles
Gold plated SMB digital and analog output jacks
Front panel test jacks for threshold measurement
2.1 mm X 5.5 mm barrel power connector
INDICATOR LED: Green power
PACKAGING 3.3" (L) x 2.1" (W) x 0.9" (H) extruded anodized aluminum enclosure

PDF Datasheet: J730 fiberoptic-to-electrical converter

PDF Manual: J730 fiberoptic-to-electrical converter

J730-1: 850 nm single-channel compact fiberoptic-to-electrical converter with ST connectorization

J730-3: 1310 nm single-channel compact fiberoptic-to-electrical converter with ST connectorization

J730-5: 1550 nm single-channel compact fiberoptic-to-electrical converter with ST connectorization

J730-11: 850 nm single-channel compact fiberoptic-to-electrical converter with FC connectorization

J730-13: 1310 nm single-channel compact fiberoptic-to-electrical converter with FC connectorization

J730-15: 1550 nm single-channel compact fiberoptic-to-electrical converter with FC connectorization

J12: 12 volt power supply

J14: International plug adapter set for J12

J41: 3' SMB to SMB cable

J41-2: 6" SMB to SMB cable

J42: 3' SMB to SMA cable

J53: 3' SMB to BNC cable

J53-2: 6" SMB to BNC cable

J59: 3' ST to ST fiberoptic cable (multi mode simplex)

J60: 3' FC to FC fiberoptic cable (single mode simplex)

J61: 3' ST to ST fiberoptic cable (single mode simplex)