US Digital QSB Quadrature to USB Adapter
US Digital QSB Quadrature to USB Adapter
QSB is a USB encoder-interface family for a Windows or Linux host. QSB-S, QSB-D and QSB-M have different signal and I/O capabilities, so the chosen suffix and cable must match the measurement task.
Review Summary
Consider QSB for bench checks or a documented host-based encoder interface. Choose the correct electrical input variant and verify the software workflow; a hardware count-rate limit does not establish deterministic PC control timing.
Price and Availability
Request a quote for the selected configuration and current delivery schedule. Reference prices in a linked review are indicative, configuration-specific information rather than checkout prices.
- Manufacturer: US Digital
- Model: US Digital QSB Quadrature to USB Adapter
- Reviewed family: QSB-S, QSB-D and QSB-M
- Host interface: USB Type A; appears as a serial COM interface
- Encoder selection: Single-ended or differential interface depends on variant
- Published quadrature scope: Up to 6 MHz; interpretation must follow the datasheet
- Power: USB-powered adapter and compatible connected encoder
- QSB-M scope: Additional I/O and a step/direction control option; external motor-power hardware required






















