Wireless Telegraphy and Telephony
Forfatter: Alfred P. Morgan
År: 1917
Forlag: The Norman W. Henley Publishing Company
Sted: New York
Udgave: Third Edition, Fully Illustrated
Sider: 33
UDK: 621.396.1 Mor
A practical Treatise on Wireless Telegraphy and Telephony, giving Complete and Detailed Explanations of the Theory and Practice of Modern Radio Apparatus and its Present Day Applications, together with a chapter on the possibilities of its Future Development
Søgning i bogen
Den bedste måde at søge i bogen er ved at downloade PDF'en og søge i den.
Derved får du fremhævet ordene visuelt direkte på billedet af siden.
Digitaliseret bog
Bogens tekst er maskinlæst, så der kan være en del fejl og mangler.
WIRELESS TELEGRAPHY
99
receiving instruments are connected to the ground and
aerial so that the operator is always able to hear any one
calling him. We will suppose for illustration that the
land station at 42 Broadway, New York City, wishes to
transmit a message to the steamer “Horatio Hall.”
Fig. i 15.—Continental code.
Every wireless station on land or sea has assigned to it
two or more “call letters,” which distinguish it from all
other stations, and serve as the key to messages intended
for it to receive and when signed to a message as an indi-
cation of its origin. The “call” of the land station in this
case is n. y., and that of the steamer, j. h.
In order to send the message to the ship, n. y. throws
the aerial into position for sending. This act also starts
the motor generator set supplying current to the trans-