I. Hardware Link-Related Causes
Inconsistent synchronization trigger wire length and specifications: Differences in transmission delay between different wires directly introduce synchronization deviation.
Oxidation and inconsistent contact resistance of BNC terminals cause different transmission delays for trigger signals across different channels.
Using multiple T-connectors instead of a high-precision synchronization distributor results in uneven link node losses and asynchronous trigger signal distribution.
II. Clock Reference-Related Causes
Incorrect power-on sequence between the master and slave signal sources; slave devices not locking the master clock reference; independent clock drift deviations exist for each channel.
Aging and insufficient accuracy of the onboard crystal oscillator in the master signal source leads to unstable sampling periods and random drift in sampling intervals between channels.
When multiple signal generators are cascaded, they are not connected to a hardware synchronization bus, relying solely on software synchronization; clock deviation continues to amplify after prolonged operation.
III. Trigger Parameter-Related Causes
Inconsistent trigger logic between channels; some channels use internal triggering, some use external triggering, and trigger edges use a mix of rising and falling edges.
Inconsistent BURST delay parameter configurations across channels, with residual erroneous delay settings causing signal output timing misalignment.
Different channels using different output modes cause some channels to start prematurely, leading to synchronization deviations.
IV. Channel Hardware Circuit-Related Causes
Inconsistent signal conditioning circuit parameters across channels, and differences in operational amplifiers and filter capacitors, result in varying signal transmission delays.
Damaged conditioning circuits and gain drift in some channels not only cause synchronization deviations but also amplitude distortion.
A faulty single-channel ADC chip causes abnormal sampling timing, directly resulting in complete loss of synchronization between that channel and other channels.
V. Environmental Interference-Related Causes
The presence of grounding loops in the field causes common-mode interference due to potential differences at the grounding points of different channels, leading to random jitter in the sampling timing.
Inverters, motors, and other strong electromagnetic equipment interfere with the clock circuit, disrupting the sampling period and compromising channel synchronization.
Long-term temperature drift during equipment operation causes crystal oscillator and circuit parameters to change with temperature, resulting in a slow drift in synchronization deviations over time.
