Tektronix MDO3012, Руководство пользователя

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Appendix A: Warranted Speci fi cations
√ Delta Time
Measurement
Accuracy
The formula to calculate delta-time measurement accuracy (DTA) for a given instrument setting and input
signal is given below (assumes insigni
fi cant signal content above Nyquist)
SR
1
= Slew Rate (1
st
Edge) around the 1
st
point in the measurement
SR
2
= Slew Rate (2
nd
Edge) around the 2
nd
point in the measurement
N = input-referred noise (volts
rms
, Refer to the Random Noise, Sample acquisition mode speci fi cation)
t
sr
= 1/ (Sample Rate)
TBA = timebase accuracy (Refer to the Long-term sample rate and delay time accuracy speci fi cation)
t
p
= delta-time measurement duration (sec)
RD = (Record Length) / (Sample Rate)
Assumes that error due to aliasing is insigni fi cant.
The term under the square-root sign is the stability, and is due to TIE (Time Interval Error). The errors due
to this term occur throughout a single-shot measurement. The second term is due to both the absolute
center-frequency accuracy and the center-frequency stability of the timebase and varies between multiple
single-shot measurements over the observation interval (the amount of time from the
fi rst single-shot
measurement to the fi nal single-shot measurement).
√ Threshold
Accuracy, digital
input
+/- [100 mV + 3% of threshold setting after calibration]
Requires valid SPC.
Table 1: RF Channel Characteristics
Characteristic Description
√ Phase Noise
10 kHz: < –81 dBc/Hz; (–85 dBc/Hz, typical)
100 kHz: < –97 dBc/Hz; (–101 dBc/Hz, typical)
1 MHz: < –118 dBc/Hz; (–122 dBc/Hz, typical)
Phase Noise measured offset from 1 GHz CW signal.
√ Displayed Average Noise Level
(DANL)
9 kHz to 50 kHz: < –109 dBm/Hz; (< –113 dBm/Hz, typical)
50 kHz to 5 MHz: < –126 dBm/Hz; ( –130 dBm/Hz, typical)
5 MHz to 2 GHz : < –138 dBm/Hz; (< –142 dBm/Hz, typical)
2 GHz to 3 GHz: < –128 dBm/Hz; (< –132 dBm/Hz, typical)
√ Level Measurement Uncertainty
< ±1.2 dB, < ±0.6 dB (typical), 18 °C - 28 °C temperature range
< ±2.0 dB, –10 °C to +55 °C
MDO3000 Series Oscilloscopes User Manual 195