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Appendix A: Specifications
VX4101A MultiPaq Instrument User Manual
A–7
Table A–15: Channels 1 and 2 Positive/Negative Pulse Width
Characteristics Description
Frequency Range Up to 250 MHz (500 MHz with Option 1C)
Range 1 ns to 9 million seconds
Least Significant Digit 250 ps (single-shot)
Resolution ±LSD±1.414 ((TJE
1
+
TJE
2
)/√N)±2ps
(for 1 ≤ N ≤9 million)
Accuracy ±Resolution±Width (TBE)±TLE
1
±TLE
2
±1 ns.
Table A–16: Frequency Ratio 1/2,2/1,3/1,3/2,1/3,2/3
Characteristics Description
Range 10
–12
to 10
12
Least Significant Digit (F
n
/ F
d
) * Gate time (divide F by 4 for channel 3 prescaler)
Resolution Same as LSD
Accuracy Same as LSD
Table A–17: Voltages
Characteristics Description
Offset Range ±100 V DC
Maximum Input Signal ± 125 VPP + offset
Resolution 200 mV × Attenuation/Gain
Accuracy ± 7.5% of reading ± 25 mV × Attenuation
Table A–18: Channels 1 and 2 Input Characteristics
Characteristics Description
Hysteresis (@ 1 MHz) Programmable in 10 mV
p-p
steps from:
Minimum (10 mV
p-p
on-to-off) to
Maximum (60 mV
p-p
on-to-off) × Attenuation/Gain
Coupling AC,DC
Trigger Slope Independent selection of slope polarity
Attenuator ×1, ×10, ×100 Nominal
Impedance 1 MW shunted by 15 pF or 50 W