Sifos Technologies PowerSync PSA100, Technical Reference Manual, Page: 70 / 147

PowerSync Analyzer Reference Manual
March 9, 2010 Sifos Technologies page 70
Command Command Parameters Returned
Parameters
trace_list
(
rising
|
falling
)
threshold < -start start_sample
>
<
forward
|
backward
>
< -qual count
>
1 (=Edge Found)
0 (=No Edge Found)
psa_edge_search
This utility operates on an already acquired trace (trace list of
time-value sampled data) to locate a user-specified edge within
that trace and to report the trace list sample index (1 – 511)
where the edge is found. Note: Trace Lists consist of time and
sample items with time (msec) at all even number indices and
sample value at all odd numbered indices.
trace_list
: A valid trace list returned from vdctrace or idctrace
queries.
rising
: Specifies that a rising edge is sought.
falling
: Specifies that a falling edge is sought.
threshold
: Specifies the sample level (voltage in V or current in
mA) for the desired edge transition. Range is 0.5 to 1023.5,
however with voltage traces, useful range is limited to 59.5 V
and with non-combined current traces, useful range is limited
to 511.5 mA.
-start
: Specifies that edge search should begin at some sample
index after the start of the trace. Range is 1 to 511 (odd).
start_sample
: The non-default start sample index.
forward
: Specifies that search should proceed in the direction
from start until end of trace (forward time).
backward
: Specifies that search should proceed in reverse
direction from start_sample (reverse time).
-qual
: Indicates that non-default edge recognition will be applied.
Default is 0 which is most susceptible to noise (false edge).
count
:
Non-default edge recognition criteria specifying count of
samples on both sides of threshold required in order to
accept the edge transition. Higher values overcome noise.
Default is 0 additional samples on either side of threshold.
Range is 0 to 4.
Edge Sample Index
(=511 if no edge
found)
traceList
<
-max maxAmplitude > < -min minAmplitude > < -t
maxPulseWidth >
Count of Pulse
Removed
psa_pulse_remove
This utility operates on a trace to remove an unwanted pulse that
might interfere with other subsequent trace analysis. It is also
useful for recognizing the presence of user-specified pulses in a
trace capture.
trace_list
: A valid trace list returned from vdctrace or idctrace
queries.
-max
: Indicates a non-default maximum pulse amplitude will be
specified.
maxAmplitude
: Maximum pulse amplitude of pulse to be
removed from trace. Default = 59 (V or mA). Range is 1-60.
-min
: Indicates a non-default minimum pulse amplitude will be
specified.
minAmplitude
: Minimum pulse amplitude of pulse to be removed
from trace. Default = 35 (V or mA). Range is 1-60.
-t
: Indicates that non-default maximum pulse width will be
specified.
maxPulseWidth
: Maximum duration of pulse that will meet
criterial for removal. All pulses shorter that this duration will
be removed. Default is 60 msec. Range is 2 msec to 75% of
trace duration.
Modified Trace List
(256 time and value
samples)
#samples PSA_Trace_Data psa_subsample
This utility returns a subset of a collected voltage or current trace
with evenly time-spaced sub-samples.
#samples
:
The number of evenly separated trace samples to
return.
PSA_Trace_Data
:
The TCL list of 256 time-value data returned
from a vdctrace stat or idctrace stat measurement.
{List of subsample
voltage or current
value s}