Specifications
28 P6330 3.5 GHz Differential Probe Instruction Manual
Figure 11 showsthe typi cal common-mode gain of the probe. The
CMRR can be approximated by subtracting the common-mode gain
from the --14 dB reference level. For example, --80 dB CM gain
equals +66 dBCMRR.
Frequency
10MHz1MHz 100MHz
-- 4 4
-- 5 2
-- 6 0
-- 6 8
-- 7 6
-- 8 4
1GHz
GaindB
Figure 11:Typical common-mode gain
Thegraphin Figure 12 representssimulation results ofafirstorder
model of the probe input.
Frequency (Hz)
10M
Impedance(Ω)
100k
10k
1k
100
10
100M 1G
1M
Figure 12: Typicaldifferential input im pedance vs frequency