2-12
IM DLM3054-03EN
Connecting Probes
Connect probes (or input cables such as BNC cables) to the input terminals on the bottom of the front
panel. The input impedance is 1 MΩ ± 1.0% and approximately 16 pF parallel or 50 Ω ± 1.0%.
Notes about Connections
• When connecting a probe to the instrument for the first time, perform phase correction of the probe
as described in section 2.5, “Correcting a Probe Phase.” If you don't correct the probe phase, the
frequency characteristics will not be flat, and measurements will not be correct. Perform phase
correction on each channel to which a probe is to be connected.
• Please note that if the circuit being measured is directly connected to the instrument without the use
of a probe, correct measurements may not be possible because of the effect of the input impedance
of the instrument.
Note
Only use the standard accessory probes for this instrument. If you use other probes, the specifications of this
instrument may no longer be met.
About Probes
Specifications, after probe phase compensation, of the probe
(model 701937) that is supplied as a standard accessory
For details, see the manual that came with the probe.
Item
Specifications
Probe length
Approx. 1.3 m
Input resistance
10 MΩ ± 2%
Input capacitance
Approx. 10.5 pF
Attenuation ratio
10:1 ± 2%
Bandwidth
DC to 500 MHz (within –3dB)
Rise time
700 ps or less (typical*)
Maximum input voltage
600 V (DC + ACpeak)
* Typical value represents a typical or average value. It is not strictly warranted.
Precautions to Be Taken When Using Voltage Probes Other Than
Those Provided with the Instrument
• When measuring a signal that includes a frequency close to 500 MHz, use a probe with a frequency
range above 500 MHz.
• Measurement will only be correct if the attenuation ratio is set properly. Check the attenuation ratio
of the probe that you are using and set it properly.
2.4 Connecting Probes
