Hypothetical reference circuit

Rec. ITU-R Title
F.390 Definitions of terms and references concerning hypothetical reference circuits and hypothetical reference digital paths for radio-relay systems
F.391* Hypothetical reference circuit for radio-relay systems for telephony using frequency-division multiplex with a capacity of 12 to 60 telephone channels
F.392 Hypothetical reference circuit for radio-relay systems for telephony using frequency-division multiplex with a capacity of more than 60 telephone channels

*) Withdrawn

Allowable noise power and availability

Rec. ITU-R Title
F.393  Allowable noise power in the hypothetical reference circuit for radio-relay systems for telephony using frequency-division multiplex
F.395* Noise in the radio portion of circuits to be established over real radio-relay links for FDM telephony
F.555 Permissible noise in the hypothetical reference circuit of radio-relay systems for television
F.557 Availability objective for radio‑relay systems over a hypothetical reference circuit and a hypothetical reference digital path

*) Withdrawn

Radio-frequency channel arrangements

Rec. ITU-R Title
F.701 Radio-frequency channel arrangements for analogue and digital point-to-multipoint radio systems operating in frequency bands in the range 1 350-2 690 GHz (1.5, 1.8, 2.0, 2.2, 2.4 and 2.6 GHz)
F.283 Radio-frequency channel arrangements for low and medium capacity analogue or digital radio-relay systems operating in the 2 GHz band
F.382 Radio-frequency channel arrangements for radio-relay systems operating in the 2 and 4 GHz bands
F.383 Radio-frequency channel arrangements for high capacity radio-relay systems operating in the lower 6 GHz band
F.384 Radio-frequency channel arrangements for medium and high capacity analogue or digital radio-relay systems operating in the upper 6 GHz band
F.385 Radio-frequency channel arrangements for radio-relay systems operating in the 7 GHz band
F.386 Radio-frequency channel arrangements for medium and high capacity analogue or digital radio-relay systems operating in the 8 GHz band
F.387 Radio-frequency channel arrangements for radio‑relay systems operating in the 11 GHz band
F.497 Radio-frequency channel arrangements for radio-relay systems operating in the 13 GHz frequency band
F.637 Radio-frequency channel arrangements for radio‑relay systems operating in the 23 GHz band
F.389* Preferred characteristics of auxiliary radio-relay systems operating in the 2, 4, 6 or 11 GHz bands

*) Withdrawn

Characteristics at radio, intermediate and baseband frequencies

Rec. ITU-R Title
F.699 Reference radiation patterns for line-of-sight radio-relay system antennas for use in coordination studies and inter­ference assessment in the frequency range from 1 GHz to about 70 GHz
F.306* Procedure for the international connection of radio-relay systems with different characteristics
F.268* Interconnection at audio frequencies of radio-relay systems for telephony
F.380* Interconnection at baseband frequencies of radio-relay systems for telephony using frequency-division multiplex
F.381* Conditions relating to line regulating and other pilots and to limits for the residues of signals outside the baseband in the interconnection of radio-relay and line systems for telephony
F.270* Interconnection at video signal frequencies of radio-relay systems for television
F.463* Limits for the residues of signals outside the baseband of radio-relay systems for television
F.402* The preferred characteristics of a single sound channel simultaneously transmitted with a television signal on an analogue radio-relay system
F.275* Pre-emphasis characteristic for frequency modulation radio-relay systems for telephony using frequency-division multiplex
F.404* Frequency deviation for analogue radio-relay systems for telephony using frequency-division multiplex
F.405* Pre-emphasis characteristics for frequency modulation radio-relay systems for television
F.276* Frequency deviation and the sense of modulation for analogue radio-relay systems for television
F.403* Intermediate frequency characteristics for the intercon­nection of analogue radio-relay systems

*) Withdrawn

Maintenance

Rec. ITU-R Title
F.290* Maintenance measurements on radio-relay systems for telephony using frequency-division multiplex
F.305* Stand-by arrangements for radio-relay systems for television and telephony
F.401* Frequencies and deviations of continuity pilots for frequency modulation radio-relay systems for television and telephony
F.444* Preferred characteristics for multi-line switching arrange­ments of analogue radio-relay systems
F.398* Measurements of noise in actual traffic over radio-relay systems for telephony using frequency-division multiplex
F.399* Measurement of noise using a continuous uniform spectrum signal on frequency-division multiplex telephony radio-relay systems
F.400* Service channels to be provided for the operation and main­tenance of radio-relay systems

*) Withdrawn

Trans-horizon radio-relay systems

Rec. ITU-R Title
F.396* Hypothetical reference circuit for trans-horizon radio-relay systems for telephony using frequency-division multiplex
F.397* Allowable noise power in the hypothetical reference circuit of trans-horizon radio-relay systems for telephony using frequency-division multiplex
F.593* Noise in real circuits of multi-channel trans-horizon FM radio-relay systems of less than 2 500 km
F.698 Preferred frequency bands for trans-horizon radio-relay systems
F.388* Radio-frequency channel arrangements for transhorizon radio-relay systems
F.302 Limitation of interference from trans-horizon radio-relay systems

*) Withdrawn

NOTE 1 – Some of the above Recommendations deal with digital as well as analogue radio-relay systems.

NOTE 2 – Recommendations relating to frequency sharing between analogue radio-relay systems and space radiocommunication systems are not listed here.