# Mount drives model
There are the 2 main versions of the drives model:
* PDR:
* 8kHz sampling: `MOUNT_MODEL=MOUNT_PDR_8kHz`
* FDR:
* 1kHz sampling: `MOUNT_MODEL=MOUNT_FDR_1kHz`
* 1kHz sampling with 17Hz notch filter in controller: `MOUNT_MODEL=MOUNT_FDR_1kHz-az17Hz`