July 2002
Intermediate to advanced
344 pages
8h 37m
English
Content preview from Newnes Radio and RF Engineering Pocket Book, 3rd Edition
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1. Measurement of the resistance to earth of each termination network
and each earth electrode.
2. Visual inspection of all conductors, bonds and joints or their mea-
sured electrical continuity.
BS 7430 recommends the method of testing.
Other vulnerable systems are overhead cables for either the elec-
tricity supply or telephone and control purposes.
19.7 Erection of antennas
The installation of the antenna probably influences the performance of
a radio system more than any other part. The heights involved render
supervision of the installation difficult and, although antennas are rel-
atively inexpensive, labour charges raise the cost of their replacement,
and bad weather may delay rigging work. It is therefore important that
good quality antennas
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