Variable 2 Frequency Divider 1A14A5 Circuit Functioning

TM 11-5820-695-35

Figure 2-19. 1A14 timing diagram, 0.1 MHz thumbwheel switch.

Pressing the TEST pushbutton on the main chassis

circuit diagram for 2-102 each of

applies a +5 volt lamp test signal to pin P1-1, terminal

these circuits is shown in figure 6-24.

E19, and resistor R18 to the base of transistor in DS1,

lighting the lamp red.

a. Variable 2 frequency divider contains one

printed wiring board A1 which provides the following

2-61. Variable 2 Frequency Divider 1A14A5 Circuit

circuits: 10 MHz divide-by-ten counter registers Z2

Functioning (fig. 641)

through Z6, 100/1000 MHz divide by-eight ripple through

counter registers Z7 through Z9, an output register Z10,

NOTE

and switch and control gates. The count signal from

Variable 2 frequency divider 1A14A5

variable 2 frequency divider 1A14A4 is applied to the

contains

integrated

circuits

divide-by-ten counter registers Z2 through Z6. The

designated Z1 through Z10 and Z12

output from the divide-by ten counter registers Z2

triggers

the

divide-by-eight

counter

through Z14. Integrated circuit types

MC932, 946, and 960 are used. A

2-102