Users Manual
Model 3600
www.globalspecialties.com
Page 11
in the total line and address line. The amplitude characteristic of
one group is identical and should also use the same comparison
threshold voltage. However the instrument has 32 signal input
channels and again, it is not necessary to setup 32 independently
adjustable threshold voltages. But in practice, there are measured
signals with different amplitudes for instance TTL, CMOS, and ECL. In
many experimental circuits, the amplitudes required may vary. For this
application, six independently adjustable threshold voltages can be
configured, four of which are used for four channel groups, each group
has 8 signal input channels. The other 2 are used for 2 external clock
input channels separately.
In practice, the voltage amplitudes of +5 V or +3.3 V are commonly
used in a digital circuit. Model 3600’s default settings of the threshold
voltage are at +1.6 V. Generally, the setting range of the threshold
voltages for TTL is b5V and +3.3V. The setting range of
threshold voltages for CMOS is b5V and +4.3V. If the tested
signals contain large ringing effects or other voltage noises, there will
be extraneous data in the sampled results. If this happens, repeat the
sampling function to adjust the threshold voltage and observe the
sampling waveforms, until clear and correct sampling waveforms are
obtained.
Display Setting
The 3600 logic analyzer can display a vast amount of data. There are
two display modes of sampling data: timing waveform display and data
listing display.
Timing Waveform Display
Press
【
Display
】
to view timing waveforms for up to 8 channels. Each
channel can be displayed with different colors to easily identify and
separate them visually. The order of 32 channels waveforms is that the
highest channel is on the top and the lowest channel is at the bottom.
This is to enable the highest-order digit of the byte to be on the top
and the lowest-order digit on the bottom.
Waveform Rolling Up/Down
The waveform rolling can be used to observe all the waveforms in 32
channels. Press
【
↑ ↓
】
and turn the knob to browse the waveforms.
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