Guidelines to avoid interference
To work reliably, readers needs an environment without interference. Here's how you can ensure these conditions.
Avoid interference between readers
If you mount readers too close together, they may disturb each other's ability to read cards. To avoid this interference, please keep the following distances:
Simultaneously operating readers
These are readers that work independently from each other, e.g. in Autoread mode.
Keep a minimum distance of 200 mm between any 2 readers.
Sequentially operating readers
These are readers controlled by a host so that only one reader is active at a time.
Keep a minimum distance of 50 mm between any 2 readers.
If a certain reduction in read range is acceptable, you can reduce the distance even further.
Avoid interference from other sources
Readers are susceptible to interference in the frequency range from 1 kHz to 1 MHz. To avoid interfering signals, keep a proper distance between the antenna field and
- the switch mode power supply circuitry
- the wiring inside the device where the reader is integrated.
Power filtering in BALTECH readers prevent interference through power supply lines, which are the most likely source of interference.