Serial Trigger and Decode
67
7.2 SPI Trigger and Serial Decode
7.2.1 Setup for SPI Signals
Setting the SPI (Serial Peripheral Interface) signal includes two steps: Connecting the CLK, MISO, MISO and CS signal
to oscilloscope, specifying the parameters of each input signal.
1. Touch Decode key to enter the
Decode
menu.
2. Touch
Decode
and select the desired slot (
Decode1
or
Decode2
).
3. Touch
Protocol
softkey, then use the Universal Knob to select SPI.
4. Touch
Signal
to enter the
Signal
menu.
Figure 7.8
Signal Menu
5. Set CLK (clock signal):
• Touch
CLK
to enter CLK menu.
• Touch
CLK
to select the channel that is connected to the SPI clock signal.
• Touch
Threshold
to set the SPI clock signal’s threshold voltage level by Universal Knob.
– The threshold voltage level is for decoding, and it will be regard as the trigger voltage level when set the
trigger type to serial.
• Touch
Edge Select
to set the oscilloscope will samples at clock signal’s rising edge or falling edge.
• Touch
to return previous menu.
Figure 7.9
CLK Menu
6. Set MISO:
• Touch
MISO
to enter the
MISO
menu.
• Touch
MISO
to select the channel that is connected to the SPI MISO signal.
• Touch
Threshold
softkey, then use the Universal Knob to set the SPI MISO signal’s threshold voltage level.
– The threshold voltage level is for decoding, and it will be regard as the trigger voltage level when set the
trigger type to serial.
• Touch
to return to the previous menu.
Figure 7.10
MISO Menu
