Time of silence PRM has a default value of 60 ms (period of time following the reception of the request, during which decoding PRM protected from decoding the next request).

The effectiveness of responses (response rate defendant under certain conditions Queries) is at least 70% of the rate request pairs 3800 pulses per second, or 60% (50% channel Y), when the rate increases to 8, 000 inquiries (9, 600 channel Y) pairs of pulses per second.

The capacity of the aircraft ground handling requests respondent is more than 100 onboard inquirers during working cycle 2, 700 pairs of pulses per second or more than 200 - in 4800 working cycle pulse pairs per second.

Ground respondent provides grant appropriate pulses at a constant or variable cycle operation. With constant work cycle defendant sends 2, 700 pairs of pulses per second regardless of the number of aircraft requesting. Not only pulses query that takes beacon, but the noise pulses produced its own generator launch PRD. These pulses are called impulse noise filling (Filling pulses), ie they complement partially or fully answers pulses so that the number of transmitted pulses was always constant.

For example, if there is no aircraft that request, or a few noise generator generates pulses as filling as needed to emit the required number of pairs of pulses per second.

In the mode in the variable-cycle ground defendant generates variable repetition rate depending on the number of aircraft that request. When the aircraft is no or only a few, the defendant is the minimum speed repetition of 1350 pairs of pulses per second, gradually increasing speed to the greatest number - 2700 pairs of pulses per second if operated 100 onboard applicants or to the largest number - 4, 800 pairs of pulses per second, if operated onboard 200 applicants.

Minimum duty cycle defendant maintained an internal pulse generator filling, which runs the PRD in the same way as for the pulse request.

Noise generator defendant usually guided through the circuit automatic gain control (AGC) that reduces the number of pulses of noise when the defendant requested launched aircraft. Pulses filling also called pulses skviternymy (Squitter pulses), ie, they radiated with arbitrary repetition frequency.

While a request in which the number of responses to the request signal begins to exceed the capacity of the defendant replies (2700 or 4800 pairs of pulses per second), sensitivity PRM automatically reduced to limit the respondent answers so that no perevyschuvavsya maximum duty cycle. As a result, lost most remote maintenance of several aircraft.

Principles of construction DME radio beacons the basis for building a rangefinder beacons, including radio type FSD (firm FACE STANDART), which is widespread and long-equipment of various types RSBN tract.