Conclusions
The transit time in the forward direction in an RRL containing a fixed type of equipment without regenerators can be measured with an error of 0.2 Μsec by means of the if loop with signal switching directly at the RRS terminal equipment and without the need for additional amplifiers.
If the i.f loop is used, one also has to measure the delay in the frequency-detector channel by setting the equipment rack to feed itself at i.f. The time intervals between measurements of the transit interval along the RRL are determined by the periodicity of the maintenance operations involved on this line.
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Literature cited
G. N. Palii and Yu. A. Fedorov, Tr. Vses. Nauchno-Issled. Fiz.-Tekh. Radiotekh. Izmer., No. 19 (1975).
G. T. Cherenkov, Tr. Vses. Nauchno-Issled. Fiz.-Tekh. Radiotekh. Izmer., No. 162 (222) (1974).
S. B. Pushkin et al., Izmer. Tekh., No. 10 (1976).
Yu. A. Fedorov et al., Tr. Vses. Nauchno-Issled. Fiz.-Tekh. Radiotekh. Izmer., No. 29 (59) (1976).
M. A. Chukhman et al., Principles of Radio Communication, Broadcasting, and Radio-Relay Lines [in Russian], Svyaz', Moscow (1976).
Additional information
Translated from Izmeritel'naya Tekhnika, No. 10, pp. 48–49, October, 1978.
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Fedorov, Y.A. Methods of measuring signal transit times in television channels. Meas Tech 21, 1394–1396 (1978). https://doi.org/10.1007/BF00823075
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DOI: https://doi.org/10.1007/BF00823075