2-12
IM 710105-03E
Connecting the Probe
Connect a probe (or measurement input cable such as a BNC cable) to the input terminal
on the bottom of the front panel. The input impedance is 1 MΩ
±
1.0% and approximately
20 pF or 50 Ω
±
1.0%.
Precautions to Be Taken When Connecting Cables
• When connecting a probe to the instrument for the first time, perform phase
correction of the probe as described in section 2.5, “Compensating the Probe
(Phase Correction).” If you do not, frequency characteristics will not be flat, and
measurements will not be correct. Perform the phase correction on each channel to
which a probe is to be connected.
• Note that if the object being measured is directly connected to the instrument without
using a probe, correct measurements may not be possible because of the effect of
input impedance on the instrument. Use caution.
About Probes
Specification of standard supplied probe (model 701938 or 701939), after
probe phase compensation
For details, see the manual that came with the probe.
Item
Specification
Overall probe length
701938: 1.5 m
701939: 1.3 m
Input impedance
10 MΩ ±2%
Input capacitance
701938: Approx. 13 pF
701939: Approx. 10.5 pF
Attenuation ratio
10 : 1 ±2%
Bandwidth
701938: DC to 200 MHz (not exceeding –3 dB)
701939: DC to 500 MHz (not exceeding –3 dB)
Rise time
701938: 1.75 ns or less (typical*)
701939: 700 ps or less (typical*)
Maximum input voltage
600 V (DC+ACpeak) or 424 Vrms
* Typical values are typical or mean values. They are not strictly guaranteed.
2.4 Connecting the Probe
