Unpack block header parameters into a list.
Reads the 28-byte block header from f and unpacks into a list. Endiness is corrected as needed.
Returned list contents:
| N | Variable | Description |
|---|---|---|
| 0 | scale | scaling factor |
| 1 | status | status of data in block |
| 2 | index | block index |
| 3 | mode | block mode |
| 4 | ctcount | ct value of FID |
| 5 | lpval | left phase |
| 6 | rpval | right phase |
| 7 | lvl | level drift correction |
| 8 | tlt | tilt drift correction |