2022-07
file: spotwave_instructions_manual.docx
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<hp>
Highpass cutoff frequency in kHz (0.5 ~
<lp>
)
<lp>
Lowpass cutoff frequency in kHz (
<hp>
~ 1000)
<order>
Filter order {2, 4, 6, 8}, default: 4
Valid state:
IDLE
start_acq
Start acquisition. Acquired data is saved on the device and can be read with
get_ae_data
and
get_tr_data
in recording mode or with
get_data_log
in logging mode.
Command:
start_acq
Valid state:
IDLE
stop_acq
Stop acquisition. If logging mode was enabled, it will be deactivated.
Command:
stop_acq
Valid state:
RECORDING
| LOGGING
get_ae_data
Read AE / hit data sets. The records are deleted from the device memory afterwards.
Command:
get_ae_data
Valid state:
RECORDING | IDLE
Response:
S temp=27 T=20000000 A=22 R=1166717 D=10000000 C=0 E=38788614 TRAI=0 flags=0\n
H temp=27 T=43686000 A=31004 R=496 D=703 C=4 E=74860056830 TRAI=1 flags=0\n
H temp=27 T=43686983 A=15545 R=279 D=624 C=5 E=42194101126 TRAI=2 flags=0\n
\n
The returned lines contain the information of one hit per line using the output format:
<type> <key1>=<value1> <key2>=<value2>
…
The unit of temperature is degree celsius. The unit of time quantities, such as rise time and duration is tics.
The unit of the intensity features, amplitude and energy, is ADC values and ADC values squared,
respectively. The unit of CNTS is dimensionless. The formulas below can be used for converting the raw
numbers to engineering units. Following conventions are used:
•
The sampling rate is abbreviated,
f
s
(in Hz), and is 2 MHz in case of the spotWave device.
•
The conversion factor into energy units is
𝛽
𝑒𝑒
= 10
−4
[
𝑒𝑒
]
[
µ𝑉
]
2
[
µ𝑠
]
.
•
The conversion factor from ADC values to µV,
〈
adc2uv
〉
, can be obtained via the command
get_info
.
