The Agilent HP 83481A optical/electrical plug-in module incorporates two measurement channels, one optical and one electrical. The electrical channel has two selectable bandwidth settings. In thelower bandwidth modes of 12.4 GHz, oscilloscope noise performance is excellent, while the 20 GHz mode allows greater fidelity for high speed signals. The calibrated,integrated optical channel has over 2.85 GHz bandwidth.
The integrated optical channel reduces mismatch loss variation by eliminating signal distorting cables and connectors associated with the use of external receivers in order to accurately characterize optical waveforms. The optical channel is calibrated to provide both accurate display of the received optical waveform in optical power units and measurement of the signal's average power. In addition, the User Cal feature provides for consistent accuracy at any wavelength between 1000 nm and 1600 nm using a source and power meter.
The Agilent 83481A optical/electrical plug-in module also is a calibrated SONET/SDH reference receiver that is measured to comply to ITU-TS (formerlyCCITT)G.957 and Bellcore GR-253-CORE frequency response requirements for transmitter compliance testing. By either pressing a front-panel button or issuing a GPIB command, a Bessel-Thomson filter(either fourth order or fifth order, depending on the option installed) is inserted into or removed from the measurement channel by a very repeatable Agilent Technologies microwave switch. The switch removes the potential variability and the time wasted by manually inserting and removing the filter when alternating between high-fidelity waveform characterization and SONET/SDH compliance testing.
The electrical measurement channel may be used to perform measurements on tributary electrical signals, to evaluate receiver performance in transceiver testing, for measurement swith Agilent Technologies wide range of external optical receivers, or for general purpose measurements.
The Agilent 83481A optical/electrical plug-in module provides:
- 2.85 GHz,155 Mb/s and 622 Mb/s selectable optical channel
- 12.4 GHz and 20 GHz electrical channel
- Switchable SDH/SONET filtersfor transceiver compliance testing
- 2.5 GHz trigger channel input to the mainframe
Click the PDF Specification for further information
Specifications (electrical)
- Bandwidth (–3 dB): dc to 12.4 GHz or 20 GHz, user selectable
- DC Accuracy—single voltage marker
12.4 GHz ±0.4% of full scale
±2 mV ±1.5% (reading –channel offset)
20 GHz ±0.4% of full scale
±2 mV ±3% (reading –channel offset) - DC Difference—two marker accuracy on same channel
12.4 GHz ±0.8% of full scale
±1.5% of delta marker reading
20 GHz ±0.8% of full scale
±3% of delta marker reading - Transition Time (10% to 90%) calculated from T=0.35/BW, characteristic
12.4 GHz ≤28.2 ps
20 GHz ≤17.5 ps - Maximum RMS Noise
12.4 GHz ≤0.5 mV (0.25 mV characteristic)
20 GHz ≤1 mV (0.5 mV characteristic) - Scale Factor (full scale is eight divisions)
Minimum 1 mV/div
Maximum 100 mV/div - DC Offset Range ±500 mV
- Nominal Impedance 50 Ω
- Connector 3.5 mm (m)
- Reflections ≤5% for 30 ps rise time
- Dynamic Range ±400 mV relative to channel offset
- Maximum Safe Input Voltage 16 dBm peak ac ±2V dc
Specifications (optical)
- Bandwidth (–3 dB) dc to 2.85 GHz (dc to 3.0 GHz characteristic)
- Maximum Specified Peak Input Power
Continuous Wave 0.6 mW (–2.2 dBm)
Modulated 0.4 mW (–4 dBm) - DC Accuracy (single marker)
±0.4% of full scale ±6 µW
±3% (reading –channel offset) - DC Difference(two marker accuracy, same channel
±0.8% of full scale
±3% of delta marker reading - Transition Time (10% to 90%), calculated from T=0.48/bandwidth, optical
<160 ps, unfiltered mode - RMS Noise, filtered mode
Option 040 Characteristic: < 1.0 µW
Maximum: < 1.5 µW
Option 041 Characteristic: < 1.5 µW
Maximum: < 2.5 µW - Scale Factor (full scale is eight divisions)
Minimum 5 µW/div
Maximum 100 µW/div - DC Offset Range +0.2 mW to –0.6 mW
Connector Type 9/125 µm maximum single mode - Input Return Loss
single-mode 33 dB (HMS-10 connector with 9 µm fiber) (characteristic) - Calibrated Wavelengths 1310 nm and 1550 nm
- Average Power Monitor
Specified operating range –30 dBm to 0 dBm (1 µW to 1 mW)
Factory calibrated accuracy (20°C to 30°C) ±5% of reading ±100 nW ±connector uncertainty
User calibrated accuracy (<5°C temp change) ±2% of reading ±100 nW ±power meter uncertainty - Maximum Safe Input 10 mW peak
- Wavelength Range 1000 to 1600 nm
Agilent HP partial list of options
- Option 040 Fourth order fillter response, 155 Mb/s and 622 Mb/s
- Option 050 Fifth order fillter response, 155 Mb/s and 622 Mb/s
- Option 052 Two (2) 155 Mb/s filters, one fourth order, one fifth order
- Option 062 Two (2) 622 Mb/s fillters, one fourth order, one fifth order