Fig. 2-5: Trigger Level Control
2.2.6
Measurement of different frequency
1.
In case of two input signs of CH 1 & CH 2 is the same frequency or frequency with a certain times or
a sign has a certain time difference, to select Trigger Source switch (18) in option to CH 1. The sign
is triggered based CH 1 for CH 1 sign respectively.
2.
But if you try to trigger two signs which have different frequency to set Trigger Source switch to
VERT.
In this instance, two waveforms trigger stabilized as the motif sign input to each sign source in shift.
2.2.7
Additive and Differential Operation
Additive and differential operation are forms two-channel operation where two signals are combined to
display one trace. In additive operation, the resultant trace represents the algebraic sum of the CH 1 and CH
2 signals. In differential operation, the resultant trace represents the algebraic difference between the CH 1
and CH 2 signals.
To set the PeakTech 2020 GN / PeakTech 2030 KT for additive operation, proceed as follows:
1.
Set up for dual-trace operation per paragraph 2-3-4 Dual-trace Operation.
2.
Make sure both VOLTS/DIV switches (26) and (23) are set to the same position and the VARIABLE
controls (27) and (20) are click-stopped fully clockwise. Are the signal levels are very different,
set both VOLTS/DIV switches to the position producing a large on-screen display of the highest-
amplitude signal.
3.
Trigger from the channel having the best signal.
4.
Set the V MODE switch (19) to ADD position. Then, the single trace resulting is the algebraic sum of
the CH 1 and CH 2 signals. Either of both of the Vertical POSITION controls (4) and (7) can be used
to shift the resultant trace.
Note:
If the input signals are in-phase, the amplitude of the resultant trace will be the arithmetic
sum of the individual traces (eg. 4.2 div + 1.2 div = 5.4 div). If the input signals are 180°
out-of-phase,
the
amplitude
will be the difference (eg. 4.2 div - 1.2 div = 3.0 div).
5.
If the p-p amplitude of the resultant trace is very small, turn both VOLTS/DIV switches to increase
the display height. Make sure both are set to the same position.
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There is another method to measure the sum of two signs for this product. It is the method to select INV
switch to INV concurrently. When input sign is on the equal phase by selection of INV switch the waveform of
