. The Bell System technical journal . irn: < J St I a z< J 3^ Q-ii. I I < UJ rzi ZTI E L. iRc b?. I ^-it. Fig. 10—New repeater for Type C systems. AN IMPROVED THREE-CHANNEL CARRIER TELEPHONE SYSTEM 63 Regulation At the transmitting terminal each channel is adjusted to the sameoutput level and in the operation of the system it is desirable to restorethis equality of levels at each repeater point and at the receivingterminal. In each direction of transmission the line losses at theupper end of the frequency range will be higher than at the lower (0 l^ I-cr< oz< 504846444240383634-
. The Bell System technical journal . irn: < J St I a z< J 3^ Q-ii. I I < UJ rzi ZTI E L. iRc b?. I ^-it. Fig. 10—New repeater for Type C systems. AN IMPROVED THREE-CHANNEL CARRIER TELEPHONE SYSTEM 63 Regulation At the transmitting terminal each channel is adjusted to the sameoutput level and in the operation of the system it is desirable to restorethis equality of levels at each repeater point and at the receivingterminal. In each direction of transmission the line losses at theupper end of the frequency range will be higher than at the lower (0 l^ I-cr< oz< 504846444240383634-32302826242220181614 LINE + VARIABLE ARTIFICIAL LINE + EQUALIZER - SCALE A | v^ t^^ ^\ v_ S0^ ^ \ ^ ^■■^^^ ^ vl ^^^;5 r N !«c. .^ ^ r^ < ^ r^^ f_ X^ ^^ ^ r<. -^ ^V \ _ BASICEQL. ~ OPEN WIRE LINE ^ _ ,w ^Mf ^ ^^ K^ P^ \^ >\-5-i ^ ^^ -^ _0P ^ \N£ ^^ P^ L^ LINE-200 MILES OF 128 MIL. WIRECS INSULATORS-8 SPACING 22 20 18 O _J ;d UJUN_J °5o u6 (0 17 18 19 20 21
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
