B&K Precision 4078 - Manual - Manual (Page 98)

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7.13 Connect the OUTPUT connector to the distortion analyzer using a 50 ohm coaxial cable and a
50 ohm feedthrough termination.
7.14 Set the unit to generate a sine waveform with 1KHz frequency and 10Vp-p.
7.15 Set the distortion analyzer to measure distortion in dB and select RMS response.
7.16 CHECK for a reading of more than -65 dB.
5.3.5 Square Transition Times
Specification: < 6 ns (10% to 90%) at 10Vp-p into 50 ohms.
Procedure:
1. Connect the OUTPUT connector to the oscilloscope input using a 50 ohm coaxial cable and a
50 ohm feedthrough termination.
2. Select WAVE and SQUARE to generate square waveform with 1MHz frequency and 10Vp-p.
3. Use the oscilloscope markers to measure the Rise and Fall times of the square, from 10% to
90% levels.
4. CHECK for rise and fall times of < 12 ns.
5.3.6 Square Variable Duty Cycle
Specification: variable from 20% to 80% with ± 0.5% accuracy at 1 KHz.
Procedure:
1. Connect the OUTPUT connector to the counter input using a 50 ohm coaxial cable and a 50 ohm
feedthrough termination.
2. Select SQUARE to generate square waveform with 1KHz frequency and 5Vp-p.
3. Set the counter to measure duty cycle and select the automatic trigger mode.
4. On the unit change the symmetry to 20%, 50% and 80%
5. CHECK for duty cycle readings between 19.0% - 21.0%, 49.0% - 51.0% and 79.0% - 81.0%.
5.3.7 Operating Modes
Specification: Continuous, triggered, gated, and burst.
Procedure:
1. Connect the OUTPUT connector to the oscilloscope vertical input using a 50 ohm coaxial
cable and a 50 ohm feed-through termination.
2. Push the MODE key on the unit front panel.
3. Verify that the oscilloscope displays a 1KHz sine wave. Make sure that the Output is ON.