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Appendix A: Specifications
VX4101A MultiPaq Instrument User Manual
A–5
Table A–8: Channel 1 and 2 Period
Characteristics Description
Range 4 ns to 9 million seconds (2ns min. with Option 1C).
Least Significant Digit 250 ps or 250 ps/N rounded downward to the nearest decade.
Resolution UnGated Resolution:
±LSD±1.414(TJE)/N±2 ps
Gated Resolution:
±(P
VCO
/n)±(1.414(TJE)/n).±2 ps
Accuracy ±Resolution±TBE
VCO
.
NOTE: Detection of signals crossing prescribed thresholds is subject to timing uncertainty
(trigger jitter error) due to system noise and threshold inaccuracies. This error affects all
measurements but is more pronounced for single-shot measurements and for signals with
slow rise and fall time. The timing trigger jitter error (TJE) equals:
[(RMSnoiseofinputsignal)
2
) (RMSnoiseofinputChannel)
2
]
1ń2
InputSlewRateattheTriggerPoint
Table A–9: Channel 3 Frequency (Option 2C)
Characteristics Description
Range 200 MHz to 3000 MHz
Least Significant Digit 10exp{Int(log((P
VCO
/4) * 4 * F
2
/(N±4 * F(P
VCO
/4)))) + 1}.
Resolution Ungated Resolution:
±LSD±1.414(TJE) F
2
/N.
Gated Resolution:
±((P
VCO
) * F
2
/n)±(1.414(TJE) * F
2
/n).
Accuracy ±Resolution±F(TBE)
Table A–10: Channel 3 Period (Option 2C)
Characteristics Description
Range 333 ps to 5 ns
Least Significant Digit 250 ps or 250 ps/N rounded downward to the nearest decade.
Resolution Ungated Resolution:
±LSD±1.414(TJE)/N±2 ps
Gated Resolution:
±(P
VCO
/n)±(1.414(TJE)/n)±2 ps
Accuracy ±Resolution±TBE
VCO