External Clock Input (Ext Clk In) - YOKOGAWA WT1800 User Manual

4.3

External Clock Input (EXT CLK IN)

Only apply signals that meet the following specifications. Signals that do not meet the
specifications, such as those with excessive voltage, may damage the WT1800.
External Clock Signal Input Connector
Apply a clock signal that meets the following specifications to the external clock input connector (EXT
CLK) on the rear panel.
Common
Item
Connector type
Input level
To Apply a Synchronization Source That Determines the
Measurement Period
Item
Frequency range
Input waveform
To Apply a PLL Source during Harmonic Measurement
Item
Frequency range
Input waveform
To Apply a Trigger Source for Displaying Waveforms
Item
Minimum pulse width
Trigger delay
4-4
CAUTION
Specifications
BNC connector
TTL (0 V to 5 V)
Specifications
Same as the measurement ranges listed under "Frequency Measurement"
in section 6.5, "Features"
50% duty ratio rectangular wave
Specifications
0.5 Hz to 2.6 kHz
50% duty ratio rectangular wave
Specifications
1 μs
Within (1 μs + 3 sample intervals)
IM WT1801-03EN