Noise Immunity
Set the AV cursors to the upper and lower threshold limits of a digital circuit.
For example, with TTL:
1. Superimpose the A REF cursor on the trace with input coupling at GND.
2. Set the A cursor for a 2.0 V readout.
3. Set the A REF cursor for 1.2 V readout, the difference between the 0.8 V
lower-threshold limit and the 2.0 V upper-threshold limit.
4. Set Input Coupling to DC and observe the relationship between the signal
and the cursors.
The signal is faulty if it changes direction between cursors or if either the high level or the low level appears between cursors.
I'm really confused on how the logic signal is faulty when it changes directions between the cursors? or the high level or low level appears between the cursors
Does this make sense to you? because I thought logic signals switch from low to high or high to low so it's going to change directions between the cursors or appear between the cursors.
I'm confused about this.
Set the AV cursors to the upper and lower threshold limits of a digital circuit.
For example, with TTL:
1. Superimpose the A REF cursor on the trace with input coupling at GND.
2. Set the A cursor for a 2.0 V readout.
3. Set the A REF cursor for 1.2 V readout, the difference between the 0.8 V
lower-threshold limit and the 2.0 V upper-threshold limit.
4. Set Input Coupling to DC and observe the relationship between the signal
and the cursors.
The signal is faulty if it changes direction between cursors or if either the high level or the low level appears between cursors.
I'm really confused on how the logic signal is faulty when it changes directions between the cursors? or the high level or low level appears between the cursors
Does this make sense to you? because I thought logic signals switch from low to high or high to low so it's going to change directions between the cursors or appear between the cursors.
I'm confused about this.