A relationship between two signals such that their corresponding significant instants do not necessarily occur at the same time.
Note: Two signals having different nominal signaling rates and not stemming from the same clock or from homochronous clocks are usually heterochronous.

1. To generate new frequencies by mixing two or more signals in a nonlinear device such as a vacuum tube, transistor, or diode mixer.
Note: A superheterodyne receiver converts any selected incoming frequency by heterodyne action to a common intermediate frequency where amplification and selectivity (filtering) are provided.
2. A frequency produced by mixing two or more signals in a… (Read More →)

In radio reception and retransmission, a repeater that converts the original band of frequencies of the received signal to a different frequency band for retransmission after amplification.
Note: Heterodyne repeaters are used, for example, in microwave systems, to avoid undesired feedback between the receiving and transmitting antennas. Synonym IF repeater.

Multiplexing in which not all the information-bearer channels operate at the same data signaling rate.

Routing in which data, such as time delay, extracted from incoming messages, during specified periods and over different routes, are used to determine the optimum routing for transmitting data back to the sources.
Note: Heuristic routing allows a measure of route optimization based on recent empirical knowledge of the state of the network.

Hexadecimal

1. Characterized by a selection, choice or condition that has sixteen possible different values or states. Synonym sexadecimal.
2. Pertaining to a fixed-radix numeration system in which the radix is sixteen.

Abbreviation for high frequency.

1. Hybrid Fiber Coax,
2. Hybrid Fiber Coaxial cable.

Abbreviation for high-frequency distribution frame.