Acqiris SA230E User Manual page 34

2.3 Real-time peak-listing mode (PKL option)
Bits Width
7:0 8
31:8 24
79:32 48
94:80 15
95 1
110:96 15
159:112 48
181:160 22
203:184 20
231:208 24
248:232 17
Table 2.6 - Structure of the pulse descriptor.
Bits Width
7:0 8
255:8 -
Table 2.7 - Structure of the alignement descriptor.
See the Code example (page 36)
Performance
The maximum rate that can be sustained is one pulse per 16 samples. Short-term higher pulse rates
can be absorbed.
Limitations
This mode cannot be used simultaneous with the decimation feature and with a pre-trigger delay.
The peak list mode can be combined with the streaming mode (CST option), excepted when enabling
the Data storage mode.
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Field Type
Descriptor Type Unsigned
Record Counter Unsigned
Timestamp Signed
Width Unsigned
Overflow Binary
Ovr Count Unsigned
Sum of Squares Unsigned
Signed fixed point (8 frac-
Peak X
tional bits)
Signed fixed point (3 frac-
Peak Y
tional bits)
unsigned fixed point (8
Center of Mass X fractional bits) fixed point
(8 fractional bits)
Signed fixed point (1 frac-
Center of Mass Y
tional bit)
Field Type
Descriptor Type Unsigned
for more information about data readout.
Comments
0x14 = pulse descriptor
Timestamp with sample resolution relative to
the trigger position of first pulse sample. This
value can be negative when a peak is found
close to the trigger time.
Pulse width in samples
Pulse width overflow flag
ADC over-range samples counter
Peak X coordinate relative to the first pulse
sample. This value can be negative and in
such case, user should review the smoothing
parameters.
Peak Y coordinate
Center of Mass X coordinate relative to the
first pulse sample
Center of Mass Y coordinate
Comments
0x1f = alignment descriptor
Reserved
Acqiris SA230E User's Manual