Vertical scale
Reference
amplitude
Horizontal scale Test frequency
-3 dB
DPO7254C
DPO7104C
DPO7054C
10 mV
60 mV
1 ns
2.501 GHz
1 GHz
500 MHz
≥42.4 mV
20 mV
120 mV
1 ns
2.501 GHz
1 GHz
500 MHz
≥84.8 mV
50 mV
300 mV
1 ns
2.501 GHz
1 GHz
500 MHz
≥212 mV
100 mV
600 mV
1 ns
2.501 GHz
1 GHz
500 MHz
≥424 mV
200 mV
1.2 V
1 ns
2.501 GHz
1 GHz
500 MHz
≥848 mV
500 mV
3 V
7
1 ns
2.501 GHz
1 GHz
500 MHz
≥2.12 V
7
1 V
5 V
7
1 ns
2.501 GHz
1 GHz
500 MHz
≥3.535 V
7
c. Set the vertical scale:
For the channel you are testing, set the vertical
Scale
to the next setting
in the table, starting with the 100 mV setting. (See
on page 228.)
d. Set thetriggering coupling:
From the button bar, touch Trigger, then
select Coupling
DC
.
e. Display the test signal:
Do the following subparts to first display the
reference signal and then the test signal.
■
From the button bar touch
Measure
; then select the
Time
tab.
■
Touch the
Freq
button to measure the frequency of the current
channel.
■
Select the
Ampl
tab. Touch the
Amplitude
button.
■
Touch the
Statistics
button, then touch the
Mean
button.
■
Touch the
X
(Close) button.
■
Set the generator output so the Chx Amplitude mean readout equals
the reference amplitude in the table. This corresponds to the vertical
scale set in substep 2.c. (See
on page 228.)
■
Record the reading on the power meter.
■
Set the trigger as follows:
Press the front-panel
Push-Set 50%
as necessary to trigger a stable
display. At full bandwidth, you may also want to make small, manual
adjustments to the trigger level. You can use the
Trigger Level
knob to
do this.
f. Measure the test signal:
Set the frequency of the generator, as shown on screen to the test
frequency in the table that corresponds to the vertical scale set in substep
7
If your generator cannot output the required amplitude, determine its maximum output at the Test frequency, and use this for the reference amplitude.
The -3 dB limit can be calculated as: 0.707 × reference amplitude.
Performance verification (MSO/DPO70000C, MSO/DPO70000DX, and DPO7000C series)
MSO70000C/DX, DPO70000C/DX, DPO7000C, MSO5000/B, DPO5000/B Series
229
Summary of Contents for DPO5000 Series
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