If a duplex channel can be shared and operated in both directions simultaneously it is styled a " full-duplex " channel and full-duplex protocols may be used.
12.
The initial set of frequencies provided for a set 40 duplex channels using 25 kHz separation, with the phones transmitting in the 914-915 MHz band and the base stations in the 959-960 MHz band.
13.
Full break-in or QSK operation is a technique and protocol used on radiotelegraph half-duplex channels that closely approximates the " feeling " of operating on a full-duplex channel . e . g.
14.
Full break-in or QSK operation is a technique and protocol used on radiotelegraph half-duplex channels that closely approximates the " feeling " of operating on a full-duplex channel . e . g.
15.
Each duplex channel was composed of 2 frequencies . 416 of these were in the 824 849 MHz range for transmissions from mobile stations to the base stations, paired with 416 frequencies in the 869 894 MHz range for transmissions from base stations to the mobile stations.
16.
To support two way conversations on half duplex channels, analog radio frequency hardware antenna switches must be provided at each station location to connect and disconnect the transmitters and receivers from their antennas whenever the channel transmission control is turned over from one station to the other.
17.
A radiotelegraph " duplex channel " comprises a transmitter and a receiver combination ( transceiver ) together with one or two antennas at a station on one end of the channel coupled with a similar complement for the station on the other end; in contrast to a simplex channel, it is possible for both stations on a duplex channel to send information to each other.
18.
A radiotelegraph " duplex channel " comprises a transmitter and a receiver combination ( transceiver ) together with one or two antennas at a station on one end of the channel coupled with a similar complement for the station on the other end; in contrast to a simplex channel, it is possible for both stations on a duplex channel to send information to each other.
19.
On half-duplex channels the radio station : receiver, transmitter, and antenna or antennas are usually interconnected by so-called " "'transmit / receive " or ( T / R ) switches "'that effectively "'connect and disconnect the receiver and transmitter from the antenna "'or antennas as required by the radiotelegraph channel protocol in use.
20.
With radiotelegraph communications, so-called " QSK operation " enables a fluid style of half-duplex channel control based upon the capability, as provided by the QSK hardware T / R switches, for a receiving operator to interrupt a sending operator in mid-character, during any of the ubiquitous silent periods between Morse code signals, in a manner similar to the way in which normal human voice conversations allow mid-syllable interruption of speakers by listeners.
