.:madworm:.'s photos with the keyword: MIBAM

This trigger point looks right

This trigger point looks right

.:madworm:.
19 Apr 2012 136
This one should have (and has) triggered on a positive pulse of 103µs length.
Confused trigger

Confused trigger

.:madworm:.
19 Apr 2012 117
This one should have triggered on a positive pulse shorter than 16.5µs.
Confused trigger

Confused trigger

.:madworm:.
19 Apr 2012 127
This one should have triggered on a negative pulse of 14.0µs length.
MIBAM - OK ISR run time

MIBAM - OK ISR run time

.:madworm:.
19 Apr 2012 161
Now the ISR is short enough as not to interfere too much with the least significant bits.
MIBAM - bad ISR runtime

MIBAM - bad ISR runtime

.:madworm:.
19 Apr 2012 161
The ISR takes too long and messes up the timing of the least significant bits.
MIBAM - delayed interrupt

MIBAM - delayed interrupt

.:madworm:.
19 Apr 2012 161
Once in a while the interrupt gets delayed. The green pulse-train shows when and how long the ISR runs. This causes fluctuations in brightness.
MIBAM - trying to get it to trigger

MIBAM - trying to get it to trigger

.:madworm:.
19 Apr 2012 163
MIBAM

MIBAM

.:madworm:.
19 Apr 2012 161
Playing with the persistence setting. It is variable, but unfortunately the old traces don't fade out. They just vanish after a timeout.
Confused trigger

Confused trigger

.:madworm:.
19 Apr 2012 156
This one should have triggered on a positive pulse longer than 177µs.
Confused trigger

Confused trigger

.:madworm:.
19 Apr 2012 147
This one should have triggered on a positive pulse shorter than 73µs.
MIBAM waveform

MIBAM waveform

.:madworm:.
18 Apr 2012 167
As expected / feared, memory depth is always too low :-( Every DSO should have at least 1M per channel.
MIBAM waveform

MIBAM waveform

.:madworm:.
18 Apr 2012 159
This should be a representation of the number 1110 = 14. The small spikes are caused by interrupt code running. The low periods should have lengths of 2N, 4N, 8N. I'll have to try this again with an external trigger. There is too much jitter to get a stable image.