83481A/54751A Module Specifications
83481A module specifications and characteristics apply when a module is installed in the instrument mainframe. The following notes refer to the module specifications listed in this chapter.
All specifications describe warranted performance over the temperature range +10° C to + 40° C (unless otherwise noted). The specifications are applicable after the temperature is stabilized, which occurs after 1 hour of continuous operation and while module calibration is valid. Many performance parameters are enhanced through frequent, simple user calibrations.
Specifications describe warranted performance. Characteristics provide useful, nonwarranted information about the functions and performance of the instrument. Characteristics are printed in green italics.
Factory Calibration Cycle. For optimum performance, the instrument should have a complete verification of specifications once every 12 months.
Nominal Value indicates the expected, but not warranted, value of the parameter.
| Item | Description |
|---|---|
| Optical Channel Unfiltered Bandwidth | dc to 2.85 GHz (dc to 3 GHz characteristic) |
| Maximum Specified Peak Input Power | |
| Continuous wave | 0.6 mW (–2.2 dBm) |
| Modulated | 0.4 mW (–4 dBm) |
| Exceeding the specified input power level will cause waveform distortion. | |
| Wavelength Range | 1000 to 1600 nm |
| Calibrated Wavelengths | 1310 nm and 1550 nm |
| Filters/Data Rates (MB/s) | STM-1/OC-3 (155) STM-4/OC-12 (622) |
| Transition Time (10%to 90% calculated from TR = 0.48/BW optical) | ≤ 245 ps (characteristic) |
| RMS Noise 2 GHz or filtered mode | |
| Characteristic | < 1.5 μW |
| Maximum | < 2.5 μW |
| Scale Factor | |
| Minimum | 5 μW/division |
| Maximum | 100 μW/division |
| CW Accuracy (single marker, referenced to average power monitor) | ±0.4% of full scale ±6 μW ±3% of (reading – channel offset) ±2%/°C ( Δ Tcal) (reading)–0.4%/hr ( Δ Time) (reading) |
| Δ Tcal represents the temperature change in Celsius from the last user module calibration. Please note that the temperature term goes to zero upon execution of a module calibration. Δ Time represents the time since the last user module calibration. The uncertainty due to time typically stabilizes after 24 hours. This term goes to zero upon execution of a module calibration. | |
| Offset Range (referenced two divisions from screen bottom) | +0.2 mW to –0.6 mW, |
| Average Power Monitor (specified operating range) | –30 dBm to –4 dBm (1 μW to 400 μW) |
| Factory Calibrated Accuracy (20°C to 30°C) | ±5% of reading ± 100 nW ± connector uncertainty |
| User Calibrated Accuracy < 5°C change | ±2% of reading ± 100 nW ± power meter uncertainty |
| Maximum Safe Input Power | 10 mW peak |
| Fiber Input | 9/125μ m |
| Connector for fiber input is user-selectable. | |
| Input Return Loss (HMS-10 connector fully filled fiber) | 33 dB |
| Item | Description |
|---|---|
| Electrical Channel Bandwidth | 12.4 and 20 GHz |
| Transition Time (10% to 90% calculated from TR = 0.35/BW) | |
| 12.4 GHz | 28.2 ps (characteristic) |
| 20 GHz | 17.5 ps (characteristic) |
| RMS Noise | |
| Characteristic | 0.25 mV, 12.4 GHz 0.5 mV, 20 GHz |
| Maximum | 0.5 mV, 12.4 GHz 1 mV, 20 GHz |
| Scale Factor (full height is eight divisions) | |
| Minimum | 1 mV/division |
| Maximum | 100 mV/division |
| Δ Tcal represents the temperature change in Celsius from the last user module calibration. Please note that the temperature term goes to zero upon execution of a module calibration. Δ Time represents the time since the last user module calibration. The uncertainty due to time typically stabilizes after 24 hours. This term goes to zero upon execution of a module calibration. | |
| dc Accuracy (single marker) | |
| 12.4 GHz | ±0.4% of full scale ±2 mV ± 1.5% of (reading – channel offset) ±2%/°C ( Δ Tcal) (reading)–0.4%/hr ( Δ Time) (reading) |
| 20 GHz | ±0.4% of full scale ±2 mV ± 3% of (reading – channel offset) ±2%/°C ( Δ Tcal) (reading)–0.4%/hr ( Δ Time) (reading) |
| Offset Range (referenced to center of display graticule) | ±500 mV |
| Input Dynamic Range (relative to channel offset) | ±400 mV |
| Maximum Input Signal | ± 2 Vdc (+16 dBm) |
| Nominal Impedance | 50 Ω |
| Reflections (for 30 ps rise time) | ≤ 5% |
| Electrical Input | 3.5 mm |