| 摘要 |
Programmable or fixed delay response shape bulk delay extender circuit for a line conditioner or equalizer system having a cascade set of all pass sections for processing signals in which said sections introduce for different frequencies a delay of said signals, and programming apparatus for selectively neutralizing such delay introduced therein by one or more of the all pass sections to produce various delay response shapes or to effect a complete bypass of the bulk delay extender. The programming apparatus is a multi-position rotary switch having both indication mechanism and controlling mechanism selectively neutralizing delay introduced by one or more of the all pass sections to produce various delay response shapes or effecting a complete bypass of the bulk delay extender. The indication mechanism may include a panel adjacently positioned to the multi-position rotary switch, the panel having data indicative of the effective neutralization of the various selected programs and may also include data indicative of a bypassed or non-bypassed condition of the bulk delay extender.
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