54754A Module Specifications
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 topic.
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.
54754A General Specifications
| Item | Description |
|---|---|
| Channels (user selectable) | |
| Bandwidth (-3 dB) | dc to 12.4 or 18.0 GHz |
| The above bandwidths are user selectable. The input sampler is biased differently for increased bandwidth in the 18 GHz bandwidth mode. Channel 1/3 is the TDR input located on the upper left of the module. Channel 2/4 is the electrical input located on the lower left of the module. | |
| dc Accuracy (single marker when driven from a 0 ohm source) | |
| 12.4 GHz | ±0.4% of full scale ±2 mV ±0.6% of reading - channel offset |
| 18 GHz | ±0.4% of full scale ±2 mV ±1.2% of reading - channel offset |
| The above is the DC accuracy when operated within ±2°C (±3.6°F) of the temperature of the last plug-in module calibration. When operated within ±5°C (±9°F) of the temperature of the last module calibration, the final term in the DC accuracy specification is 2.5 times higher. | |
| dc Difference (two marker accuracy on the same channel) | |
| 12.4 GHz | ±0.8% full scale ±1.2% of delta reading |
| 18 GHz | ±0.8% full scale ±1.2% of delta reading |
| The above is the DC difference when operated within ±2°C (±3.6°F) of the temperature of the last plug-in module calibration. When operated within ±5°C (±9°F) of the temperature of the last module calibration, the final term in the DC difference specification is 2.5 times higher. | |
| Transition Time (10% to 90% calculated from TR = 0.35/BW) | |
| 12.4 GHz | 28.2 ps |
| 18 GHz | 19.4 ps |
| RMS Noise Typical | |
| 12.4 GHz | 0.25 mV |
| 18 GHz | 0.5 mV |
| Maximum | |
| 12.4 GHz | 0.5 mV |
| 18 GHz | 1.0 mV |
| Scale Factor (full height is eight divisions) | |
| Minimum | 1 mV/division |
| Maximum | 100 mV/division |
| Display Resolution | 256 points |
| dc Offset Range (referenced two divisions from screen bottom) | ±500 mV |
| An effective offset of ± 900 mV can be achieved using the ±500 mV of channel offset and adding ±400 mV of offset using the signal processing math Add function with a constant operand. | |
| Nominal Impedance | 50 ohm |
| Connectors (channel and trigger) | 3.5 mm (m) |
| Input Reflection/Return Loss | ≤ 5% for 30 ps rise time |
| Number of Channels | 2 |
| Dynamic Range/Maximum Specified Input Power | ±400 mV relative to channel offset |
| Maximum Safe Input | ±2 V + peak AC (+16 dBm) |
54754A TDR System Specifications
Normalized information is a characteristic, not a specification. The information is presented here for comparison purposes only. Normalization characteristics are achieved only with the use of the TDR calibration using the firmware routines. Rise time is measured in the Averaged Display mode with best flatness on (default in TDR mode). The rise time of the generator is less than 35 ps, as calculated by:
Flatness is measured in the Averaged Display mode with best flatness on (default in TDR mode).
54754A TDR System Specifications
| Item | Description |
|---|---|
| Rise Time | |
| Combined Oscilloscope and TDR Performance | < 45 ps |
| Normalized Characteristic | Adjustable: allowable values based on time base setting. (characteristic)Minimum: 17 ps or 0.08 x time/div, whichever is greater. (characteristic)Maximum: 5 x time/div. (characteristic) |
| Flatness | |
| Combined Oscilloscope and TDR Performance | < ± 1% after 1 ns from edge. < +5%, –5% to 1 ns from edge. |
| Normalized Characteristic | < 0.1% (characteristic) |
| Step Levels | |
| Combined Oscilloscope and TDR Performance | Low: 0.00V ± 2 mV High: +200 mV ± 2 mV |
| Normalized Characteristic | Low: 0.00V ± 2 mV (characteristic) High: +200 mV ± 2 mV (characteristic) |