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Appendix A: Specifications
24
P7240 4 GHz 5X Active Probe User Manual
Table 4: Typical electrical characteristics (Cont.)
Input Resistance
20 kΩ at DC (See Figure 9)
Input Capacitance 0.85 pF @100 MHz
Offset Range --5.0 V to +5.0 V
DC Offset Drift
150 V/°C or less at output of probe
0.75 mV/°C or less displayed on screen with
TekConnect interface
DC Offset Scale Accuracy ±2% (of 5x actual probe gain)
DC Voltage Measurement Accuracy,
referred to input
±(2% of input + (2% of offset) + 50 mV
output offset + 20 mV linearity error)
Delay Time 5.43 ns ±0.2 ns
System Noise
300 V
rms
or less at output of probe with
probe tip grounded
90°
54°
36°
72°
18°
-- 1 8 °
-- 3 6 °
-- 5 4 °
-- 7 2 °
-- 9 0 °
Phase (degrees)
0
20 K
18 K
16 K
14 K
12 K
10 K
8K
6K
4K
2K
Magnuitude (ohms)
1 M 10 M 100 M 1 G 5 G
Frequency
Magnitude
Phase
0°
Figure 9: Typical input impedance and phase versus frequency