Advanced time domain measurements with ADQ7
The Advanced Time Domain firmware option,
FWATD, equips the ADQ7
digitizer with advanced tools for sophisticated time domain measurements.
Multiple steps of noise suppression is provided in order to achieve
extreme dynamic range so that rarely occurring weak signals can be
detected and distinguished from the noise.
FWATD can track and
correct for temperature-dependent baseline (DC-level) fluctuations which
may otherwise lead to incorrect detection of false pulses.
It also supports several types of noise reduction both for random and
systematic noise and this helps improve the dynamic range even further.
The flexible architecture and user-defined settings makes it easy to
tailor noise reduction for any application. The block diagram below
illustrate the architecture of
FWATD.
Benefits:
-
Prior knowledge about the input signal can be used to tailor the data
capture and improve the dynamic range:
-
Programmable DC-offset allows unipolar signals to utilize the entire
input range of the digitizer.
-
Teledyne SP Devices' proprietary Digital Baseline Stabilizer (DBS) track
baseline fluctuations and adjust the baseline to a user-defined target
value. This ensures that pulse amplitude is accurately determined and
increase sensitivity of the system.
-
A frequency-selective digital filter helps reduce noise for input
signals with known limited bandwidth without loss of signal information.
-
Waveform averaging (WFA) helps reduce random noise via repeated
measurements. WFA supports unrivalled waveform lengths of over 2 million
samples.
-
The non-linear advanced threshold operation with filter is a complement
to the succeeding WFA, tailored for rarely occurring weak pulses.
-
DBS suppresses systematic noise such as pattern noise originating from
time-interleaved ADCs.
Applications:
- Scientific instruments
- Time-of-flight
- Mass spectrometry
- Electron paramagnetic resonance
- Particle physics experiments
- Test & measurements
- Distributed fiber sensing
