Consult your access control panel’s manual. Look for a table like this:
| Manufacturer | Format Name | Data Bits | Parity | | :--- | :--- | :--- | :--- | | Panel X | SPD-8 | 8-bit, no parity | None | | Panel Y | SPD-26 | 26-bit, wiegand emulation | Even/Odd | | Panel Z | OEM-SPD | 34-bit, facility code + user | Dual Parity | spd keypad format tool top
You need to match this exactly.
Use the rotary dial on the side of the tool to select your bit length. Consult your access control panel’s manual
When searching for the spd keypad format tool top, you will find cheap converters on e-commerce sites for $20-$30. Avoid them. Here is why: Investing in a top-tier tool (in the $300–$600
Investing in a top-tier tool (in the $300–$600 range) will save you dozens of hours of frustration. For a security integrator billing at $150/hour, the tool pays for itself in one job.