| modulation abbr. | |
| gen. | reglaje |
| antenn. | profundidad de modulación de velocidad para señal débil |
|
trapezoidal : 31 phrases in 13 subjects |
| Agriculture | 4 |
| Communications | 1 |
| Construction | 5 |
| Earth sciences | 1 |
| Electronics | 4 |
| Information technology | 2 |
| Mechanic engineering | 1 |
| Meteorology | 1 |
| Radio | 1 |
| Scientific | 1 |
| Technology | 6 |
| Transport | 3 |
| Water resources | 1 |