. The Bell System technical journal . 560 1060 CYCLES PER SECOND 2000 5000 8000 16—Attenuation-frequency characteristic of line equalizer and 50 miles of 16-ga. B-22 cable circuits. a somewhat complicated regulating network is called for. Front andrear views of one of these regulating networks are shown in Figs. 11and 12, the upper panel being the regulating network and the lowerthe normal amplifier. Fig. 18 shows how the gain characteristic ofthe amplifier is altered by different steps of the regulating is very closely complementary to the change in cable loss causedby the temper
. The Bell System technical journal . 560 1060 CYCLES PER SECOND 2000 5000 8000 16—Attenuation-frequency characteristic of line equalizer and 50 miles of 16-ga. B-22 cable circuits. a somewhat complicated regulating network is called for. Front andrear views of one of these regulating networks are shown in Figs. 11and 12, the upper panel being the regulating network and the lowerthe normal amplifier. Fig. 18 shows how the gain characteristic ofthe amplifier is altered by different steps of the regulating is very closely complementary to the change in cable loss causedby the temperature variations and thus it will be evident that theeffects of the temperature changes are largely eliminated. Delay Equalizers The velocity of transmission through a loaded cable decreases asthe frequency is increased toward the cutoff point of the neutralize this effect, delay-equalizing networks are inserted in thecircuit which retard the lower frequencies, thus equalizing the velocity LONG DISTANCE CABLE CIRCUIT 589. en C3u O 0)+-» bec 3beID o s o be 590 BELL SYSTEM TECHNICAL JOURNAL o Q. UJ I-(/1 C H QUJ cccr UJU-UJ cr I UJ crO > <r DU JDU I z ^^ --, . -^ / -^ ^_ ^ / 1 0 3 0 5 0 IC )0 2( 50 500 1000 2000 500C 3000 CYCLES PER SECONDFig. 18—Gain-frequency characteristic of regulating repeater without line equalizer. (0Ozooiij UJ
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
