The Keysight (Agilent/HP) 83485B is a high-performance optical and electrical plug-in receiver module designed for use with the HP/Agilent 83480A Digital Communications Analyzer (DCA) and 54750A Digitizing Oscilloscope mainframes. This single-slot module features a 20 GHz optical channel and a 20 GHz electrical channel, making it ideal for characterizing optical transmitters, transceivers, and high-speed electrical signals in telecommunications and data communications applications. It provides high precision, low noise, and stable measurements at calibrated wavelengths of 1310 nm and 1550 nm.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | 1x Optical Input (HP/Agilent Universal Adapter), 1x Electrical Input (2.4 mm male) |
| Display | None (uses mainframe display) |
Physical
| Parameter | Value |
|---|---|
| Power Supply | Powered directly via mainframe plug-in slot |
| Operating Temperature | 15 °C to 35 °C |
| Dimensions (W×H×D) | Standard single-width mainframe plug-in module |
System Compatibility
| Parameter | Value |
|---|---|
| Platform Compatibility | HP / Agilent 83480A, HP / Agilent 54750A |
| Module Slot Width | 1 slot |
Optical Channel (Channel 1)
| Parameter | Value |
|---|---|
| Optical Wavelength Range | 1200 nm to 1600 nm |
| Optical Bandwidth (-3 dBo) | 20 GHz |
| Electrical Bandwidth (-3 dBe) | 12.4 GHz |
| Calibrated Wavelengths | 1310 nm, 1550 nm |
| Fiber Type Compatibility | 9/125 µm single-mode fiber |
| Optical Connection Interface | HP/Agilent Universal Adapter (HMS-10 compatibility) |
| Maximum Safe Optical Input Power | 10 mW peak |
| Optical RMS Noise (Typical) | 2.5 µW |
| Optical RMS Noise (Maximum) | 4.0 µW |
| Optical Scale Factor Range | 1 µW/div to 100 µW/div |
Electrical Channel (Channel 2)
| Parameter | Value |
|---|---|
| Electrical Channel Bandwidth | 40 GHz |
| Calculated Electrical Rise Time (10% to 90%) | 8.8 ps |
| Electrical RMS Noise (Typical) | 0.4 mV |
| Electrical RMS Noise (Maximum) | 1.0 mV |
| Electrical Maximum Input Voltage | ±2 V DC + AC peak |
| Electrical Connector Type | 2.4 mm (male) |
| Electrical Input Impedance | 50 Ω |
| Electrical Scale Factor Range | 1 mV/div to 100 mV/div |
Optical Channel
| Parameter | Value |
|---|---|
| Average Power Monitor Range | -30 to +3 dBm |
| Average Power Monitor Accuracy | ±0.35 dB (at calibrated wavelengths) |
| Optical Return Loss | > 30 dB |
| Calculated Optical Rise Time (10% to 90%) | 17.5 ps (calculated from 20 GHz bandwidth) |
Electrical Channel
| Parameter | Value |
|---|---|
| Electrical Bandwidth Settings | 26 GHz / 40 GHz (selectable) |
| Electrical Input Coupling | DC |
Environmental
| Parameter | Value |
|---|---|
| Storage Temperature | -40 to +75 °C |
| Operating Humidity | Up to 95% RH (non-condensing) |
Clock Recovery Options
| Parameter | Value |
|---|---|
| Option 021 Clock Recovery Rate | 2.48832 Gb/s (OC-48/STM-16) |
| Option 021 Min Optical Input Level | -17 dBm (typical at 1310 nm / 1550 nm) |
| Option 021 Min Electrical Input Level | 10 mV p-p |
| Option 022 Clock Recovery Rate | 9.95328 Gb/s (OC-192/STM-64) |
| Option 022 Min Optical Input Level | -11 dBm (typical at 1310 nm / 1550 nm) |
| Option 022 Min Electrical Input Level | 20 mV p-p |
Technology
Optical and Electrical Sampling Oscilloscope Receiver
Applications
High-speed optical transmitter testing, telecom and datacom transceiver characterization, and high-bandwidth electrical waveform analysis