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3 Using the Probe
Power Connection
Slide open the battery compartment and attach a 9 V battery to the
snap connector. Place the battery inside compartment and then slide
the cover back in place. See Figure 2.
Figure 2 Battery Connection
Alternatively, connect the 9 VDC power lead to the power jack on the
probe. See Figure 3. Connect the lead to a USB power source.
POWER
LED
CT4121 Active FET Probe
1.2 GHz 10:1 1 MΩ // 3 pF 40 V
pk
Power
Jack
Figure 3 Power Jack