Vertical Control
44
7.4.6
Impedance
To change the impedance:
1.
Press the desired channel key.
2.
In the
Channel Menu
, use the touchscreen to select either
50
Ω
or
1 M
Ω
.
1 M
Ω
: When a passive probe with high impedance is connected, the impedance must be set to 1 MΩ, otherwise the
signal will not be detected.
50
Ω
: Suitable for high-
frequency signals transmitted through 50 Ω co
axial cables and can minimize the amplitude
distortion caused by impedance mismatching.
7.4.7
Unit
Channel sensitivity, trigger level, measurement results, and math functions will reflect the measurement units selected.
To change the units:
1.
Press the desired channel key.
2.
In the
Channel Menu
, use the touchscreen to select either
V
or
A
.
Use
Volts
for a voltage probe.
Use
Amps
for a current probe.
7.4.8
Deskew
When measuring time intervals in the nanoseconds (ns) range, small differences in cable length can affect the
measurement. Use
Deskew
to remove cable-delay errors between any two channels.
For example, two coaxial cables with a 1-inch difference in length could introduce a skew of more than 100 ps. In some
scenarios (e.g. measuring the setup/hold time between clock and data), it may be necessary to compensate the skew
between channels.
The method of compensation: Probe the same signal simultaneously using two channels (including the cables or probes
that you intend to use for measurements) and adjust the deskew parameter of one channel until the waveforms of the
two channels observed on the screen coincide horizontally.
Содержание 2560B Series
Страница 1: ......
Страница 51: ...Digital Channels 51 Figure 8 9 Digital Bus...
Страница 127: ...Serial Trigger and Decode 127 Figure 10 63 Manchester Bus...
Страница 168: ...Reference Waveform 168 Figure 14 1 Recall REFB...
Страница 210: ...Save Recall 210 Figure 22 4 Save As...
