NF wf1966, Instruction Manual

Page: 172 / 198

7.3 Performance tests
7-8
WF1966
„
Squarewave response
Connection: Use coaxial cable to connect FUNCTION OUT to an oscilloscope (50
Ω
termination).
Setting: Initialize, and then set , the frequency to 1 MHz, the amplitude to 20 Vp-p/open,
and tr/tf to 7 ns.
Measurement: Observe the waveform and measure the rise and fall times, overshoot and
undershoot.
Judgment:
The normal range is indicated in the table.
Item Normal range
Rise and fall times 10 ns or less
Overshoot and undershoot 5 % or less
„
Duty factor
Connection: Use coaxial cable to connect Function Out to a universal counter (50
Ω
terminated).
Settings: Initialize the settings, then set amplitude to 20 Vp-p, and waveform and frequency
according to the following table.
Measurement: Set the counter rise and fall period to the interval timer mode and measure the duty
(time). Use the average value, since jitter will cause dispersion in the measurement
values.
Determination: The ranges indicated in the following table are normal.
Waveform Frequency Rated range
(duty 50 % fixed) 1 MHz 490 to 510 ns
(duty 50 % fixed) 10 MHz 45.0 to 55.0 ns
(duty 50 % fixed) 50 MHz 6 to 14 ns
(duty variable) 100 kHz 4.90 to 5.10
µ
s