No. 4 : Data Train - Cs - Metrix HX0074 Guia Del Usuario

Demo: with:
Test Signal
Specs
Scope Settings
Trigger
Modes
Purposes
a) Firstly, calibrate the Oscilloscope so just the 2 signals are visible (timebase, sensitivities and trigger source
on AUX).
Important: for this signal type using Autoset may not be useful.
Data (MAIN)
CS (AUX)
b) We will now demonstrate the interest of complex triggers (2 sources) with the "count" or "delay" options.
The example provided will enable the synchronisation of an auxiliary signal, the Chip Select, with triggering on
the desired pulse in the data frame.
Additionally, this mode will enable us to always trigger on the same pulse even if it does not arrive at an
identical interval after the chip select (pulses 4 to 9).
c) Our WinZoom graphic is a unique functionality and very impressive during demonstrations.
METRIX Oscilloscope Demo Kit
MTX3x5x SPO OX 6000
& MTX105x SPO
OX 6000-II
no. 4 : Data train + CS
Type
2 signals - one CS (chip select) and one digital frame (data)
Vpp ≈ 3.4 V - F ≈ 40 kHz (data) - F ≈ 1.5 kHz (CS)
200 µs/div. - MAIN = 1 V/div. - AUX = 1 V/div.
Principal
Triggered mode preferred – deselect "Repetitive signal" (Horizontal menu)
Complex triggering with pulse count
WinZoom on pulse train
Trigger parameters:
- Principal tab:
MAIN front ; Hold-Off minimum
- Count tab or Count tab qualifier:
AUX front ; DC coupling; Trigger delay < 9
(5 in the example)
SCOPIX HANDSCOPE
on MAIN & Auxiliary on AUX
Using a timebase of 200 µs/div,
graphically select the first group of 3
pulses and release to obtain the result.
Double-click on the screen to select
"Magnification inactive" and return to
the starting point.
Chapter II - 23