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3-7
IM 704210-01E
Before Starting Measurement
3
3.6 Compensating a Probe (Carrying Out Phase
Correction)
Items Required
The following items are required.
Calibration signal
• Frequency: 1 kHz
• Voltage: 1 V
p-p
• Waveform type: Square waveform
• Output impedance: 1 M
Ω
• Recommended signal: CAL signal of the DL1540 digital oscilloscope (by YOKOGAWA)
Waveform monitor
• Frequency characteristic: DC to 100 MHz (attenuation point: -3 dB)
• Input coupling: DC
• Input impedance: Connect a 50
Ω
terminator to the input terminal of the waveform monitor.
• Recommended monitor: DL1540 digital oscilloscope (by YOKOGAWA) + 50
Ω
terminator
(type: 700976, by YOKOGAWA)
The connecting and operating procedure for the recommended calibration signal
and waveform monitor is described below.
Connecting the Calibration Signal and Waveform Monitor
CAUTION
• Never apply a voltage exceeding the maximum input voltage to the input terminals.
Damage to the input terminals may result.
• Never short-circuit the CAL signal output terminal of the DL1540 or the monitor output
terminals (MONITOR OUT) of this instrument. Never apply an external voltage to these
terminals. Damage to the internal circuits may result.
Make sure that the power to both this instrument and DL1540 is turned OFF, then connect them
as shown below.
1.
Use a BNC cable to connect the MONITOR OUT (CHA/CHB) terminal to an input terminal
of the DL1540.
2.
Connect the BNC connector of the probe to be calibrated to an input terminal of this
instrument.
3.
Connect the other end of probe to the CAL signal output terminal of the DL1540, and the
grounding wire of the probe to the function grounding terminal of this instrument.
Function grounding terminal
CAL signal output terminal
BNC cable
MONITOR OUT terminal
This instrument
Input terminal
50
Ω
terminator
DL1540
Phase correction hole