| MVP Style Monitor Receiver | |||||||
| Product Code 21 | |||||||
| Power Supply | Internal Options | External Options | Channel Capacity | Number of Freqs Tx/Rx | RF Option | Frequency Range | Oscillator Stability |
| L | A | 1 | A | A | S | 13 | A |
| 121/242 VAC | None | None | 1 Freq | 1 Rx | Standard | 30-36 | +-0.0005% |
| N | B | 2 | F | C | G | 23 | B |
| 121/242 VAC w/chrgr | COR | Tone Jack | 4 Freq | 2 Rx | CG & UHS Rx | 36-42 | +-0.0002% |
| C | E | N | 33 | ||||
| T90 Dec w/Relay | 3 Rx | Noise Blanker | 42-50 | ||||
| D | F | P | 44 | ||||
| T99 Dec Ind Call w/relay | 4 Rx | UHS Receiver | 66-78 | ||||
| E | U | 45 | |||||
| T99 Dec Ind/Grp w/relay | Channel Guard | 77-88 | |||||
| F | W | 56 | |||||
| PSLM 2-Freq | CG & NB | 138-155 | |||||
| G | 66 | ||||||
| PSLM 2 of 4 Freq Sel Priority | 150.8-174 | ||||||
| H | 77 | ||||||
| PSLM 2 of 4 Freq Sel Non Priority | 406-420 | ||||||
| 88 | |||||||
| 450-470 | |||||||
| 89 | |||||||
| 470-494 | |||||||
| 91 | |||||||
| 494-512 | |||||||