Tektronix 372, User Manual

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Appendix B: Specifications
Appendices
AĆ20
TableĂAĆ25:ăTypical Characteristics - Low Power Unit (LPU)
Item Description
Voltage Source Noise and Ripple t 0.0 5% of voltage range + 10 mV
pĆp
at 20 MHz
bandwidth.
Voltage Source Range Switching Noise Current measurement range switching: t 0.1% of
voltage range + 10 mV.
Voltage Source Overshoot t 0.1% at 100 V step 10 mA range, no load.
Voltage Source Range Changing Time Maximum 10 ms/1 range.
Voltage Source Kelvin Sense At output terminal with 2 wire connection, corrects for
up to 1 V drop. Residual output resistance is 0.3 W .
Current Source Noise & Ripple t 0.1% of range +4 pA at 20 MHz bandwidth.
Current Source Range Switching Noise Current Source Range Switching: t 0.1% of voltage
range + 10 mV.
Current Source Overshoot t 0.1% at 10 mA step 10 mA range, 10 k W load.
Current Source Range Changing Time Maximum 650 ms/1 range
Zero Cross Time 10 ms
(For +
➞
- setting or -
➞
+ setting)
Zero Cross Switching Noise 1 V (at compliance setting from 10 V to 100 V)
0.5 V (at compliance setting from 0 to 10 V)
Current Source Output
Resistance and Voltage
Measurement Input Impedance
Range Output Resistance
100 pA u 10
E12
W
1 nA u 10
E12
W
Normal Mode Rejection Ratio (for averaging mode
32 or 512)
u 70 dB at 50 or 60 Hz
Common Mode Rejection Ratio (for averaging mode
32 or 512)
u 70 dB at 50 or 60 Hz
Guard Output Resistance 150 W
Guard Offset Relative to Output t 1 mV
TableĂAĆ26:ăTypical Characteristics - AUX 1 & 2
Item Description
Ripple plus noise t 20 mV
pĆp
at 20 MHz bandwidth
Output Impedance t 0.7 W
Maximum Capacitive Load 10000 pF