TJ—90调速晶控钟

TJ-90 VELOCITY-ADJUSTABLE CRYSTAL-CONTROLLED CLOCK

T—90调速晶控是比JK—79型晶控钟推功器及87型晶控推动钟更为完美的记录器动力源,它既保持了原晶控推动动力晶体稳速的特点又具备能在大范围内任意调速的功能,使得地震记录图纸时分号角度线能简便地满足台站记录规范的要求,它可以替代JK—79型及87型晶控钟,又可改进DD—1、DK—1及传输台网多笔记录器的动力源。

Compared with the JK-79 find JK-87 crystal-controlled driving clocks the TJ-90 velocity-adjustable crystal-controlled clock is a more ideal dynamic osurce for seismic recorders. It not only maintains characteristics of stabilized velocity of the former but also has the velocity-adjustable function in the larger range, so that the angular lines of time marks (hour, minute and second) on the seismogram can simply satisfy the requirements of recording code at each station. It can substitutes the JK-79 and JK-78 crystal-controlled clocks and can improve the dynamic source of multipen recorders on DD- 1 , DK-1 and telemetering nets.