The Keysight (formerly Agilent HP) 83485A is a high-performance plug-in module featuring a 20 GHz optical channel and a 20 GHz electrical channel. Compatible with the Agilent 83480A and 86100A/B/C mainframes, it delivers high-speed waveform characterization and SONET/SDH transceiver compliance testing utilizing a switchable 4th-order Bessel-Thomson reference receiver filter.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | Mainframe backplane interface (supports HP-IB/GPIB control via host mainframe) |
| Display | None (relies on host mainframe display) |
Physical
| Parameter | Value |
|---|---|
| Power Supply | Powered by host mainframe |
| Dimensions (W×H×D) | 124 mm × 76 mm × 279 mm |
| Weight | 1.2 kg |
System Compatibility
| Parameter | Value |
|---|---|
| Compatible Mainframes | Agilent 83480A, 86100A, 86100B, 86100C |
Electrical Channel Specifications
| Parameter | Value |
|---|---|
| Electrical Channel Bandwidth | 12.4 GHz and 20 GHz (selectable) |
| Electrical Transition Time (12.4 GHz) | 28.2 ps |
| Electrical Transition Time (20 GHz) | 17.5 ps |
| Electrical Maximum RMS Noise (12.4 GHz) | 0.25 mV |
| Electrical Maximum RMS Noise (20 GHz) | 0.5 mV |
| Electrical Scale Factor Range | 1 mV/div minimum to 100 mV/div maximum (8 divisions) |
| Electrical DC Offset Range | ±500 mV |
| Electrical Nominal Input Impedance | 50 Ω |
| Electrical Dynamic Range | ±400 mV relative to channel offset |
| Electrical Maximum Safe Input | ±2 V + peak AC (+16 dBm) |
| Electrical Connector Type | 3.5 mm female |
Optical Channel Specifications
| Parameter | Value |
|---|---|
| Optical Maximum RMS Noise (20 GHz) | 25 µW |
| Optical Scale Factor Range | 20 µW/div minimum to 500 µW/div maximum (8 divisions) |
| Optical DC Offset Range | +1 to -3 mW |
| Optical Average Power Monitor Range | -30 dBm to +3 dBm (1 µW to 2 mW) |
| Optical Dynamic Range | 2 mW |
| Optical Maximum Safe Input | 10 mW peak |
| Calibrated Wavelengths | 1310 nm and 1550 nm |
| Wavelength Range | 1200 - 1600 nm |
| Optical Fiber Input Type | 9/125 µm single-mode |
| Optical Connector Type | HP universal adapter |
Reference Receiver Features
| Parameter | Value |
|---|---|
| Reference Receiver Standards Compliance | ITU-TS (formerly CCITT) G.957 and Bellcore GR-253-CORE |
| Bessel-Thomson Filter Type | 4th-order |
| Filter Switch Mechanism | Internal repeatable HP microwave switch (button or HP-IB controlled) |
Auxiliary Interfaces
| Parameter | Value |
|---|---|
| Probe Power Output | One probe power connector |
Optical Channel
| Parameter | Value |
|---|---|
| Photodetector Type | InGaAs |
| Optical Return Loss | 33 dB minimum |
| Reference Receiver Filter Rate | 2.488 Gb/s (OC-48/STM-16) |
Environmental
| Parameter | Value |
|---|---|
| Storage Temperature | -40 °C to +70 °C |
| Operating Humidity | Up to 95% RH at 40 °C (non-condensing) |
| Operating Altitude | Up to 4,600 m (15,000 ft) |
Channel Configuration
| Parameter | Value |
|---|---|
| Number of Channels | 2 (1 optical, 1 electrical) |
Clock Recovery
| Parameter | Value |
|---|---|
| Clock Recovery Rates (Option 011) | 155 Mb/s, 622 Mb/s, 2488 Mb/s |
Technology
Optical and Electrical Sampling Oscilloscope Module
Applications
High-speed digital transmitter characterization, transceiver compliance testing, and SONET/SDH testing