There is a scheme behind the unit numbers assigned to devices in the PEP (PRXX) micros. Here is a list of what types of devices fall into the following range of unit numbers
| 1 thru 50 | Miscellaneous devices such as BaBar solenoid and Bucking coil |
|---|---|
| 51 thru 100 | LER dipole (bending) magnet LGPS |
| 101 thru 200 | LER (upright) quadrupole magnet LGPS |
| 201 thru 300 | LER (skew) quadrupole magnet LGPS |
| 301 thru 400 | LER sextupole magnet LGPS |
| 902 | LER magnet bulk power supplies |
| 1000 | LER solenoids which span an entire ("A" side) half arc |
| 1000 thru 1163 | LER beamline locations in downstream half of an arc |
| 2000 thru 2110 | LER beamline locations in upstream half of a straight |
| 3000 thru 3130 | LER beamline locations in downstream half of a straight |
| 4000 | LER solenoids which span an entire ("B" side) half arc |
| 4001 thru 4200 | LER beamline locations in upstream half of an arc |
| 4999 | LER TSP LGPS |
| 5000 thru 5099 | HER dipole (bending) magnet LGPS |
| 5100 thru 5199 | HER (upright) quadrupole magnet LGPS |
| 5200 thru 5299 | HER (skew) quadrupole magnet LGPS |
| 5300 thru 5399 | HER sextupole magnet LGPS |
| 5900 thru 5999 | HER magnet bulk power supplies |
| 6000 thru 6199 | HER beamline locations in downstream half of an arc |
| 7000 thru 7199 | HER beamline locations in upstream half of a straight |
| 8000 thru 8199 | HER beamline locations in downstream half of a straight |
| 9000 thru 9199 | HER beamline locations in upstream half of an arc |