Pushbutton Switches

TM 11-6625-542-14-1

such value that the input diode will pass one pulse for

5-16.

10 A SEC Divider

every two pulses at the cathode.

This circuit operates the same way as the 5-microsecond

circuit, except that the time constant components are of

Figure 5-5 Low frequency dividers, schematic.

(Located in back of manual.)

described. With the exception of the five second divider,

5-17.

Other Dividers

each divider contains a cathode follower in its output

The other multivibrator circuits operate in a manner

circuit.

similar to the 5p sec and 10psec dividers previously

Figure 5-6 Intermediate frequency dividers, schematic diagram.

(Located in back of manual)

Figure 5-7 High frequency dividers, schematic diagram.

(Located in back of manual)

rate due to capacitor C752. To overcome a wide range

5-18.

Pushbutton Switches

in the dc level of the signal, diode V760 is incorporated in

The banana jacks, which are independent of the

the grid circuit of V750B. Resistor R756, along with

switches, receive signals directly from the dividers and

diode V760, holds the grid of V750B at - 7 volts when no

multipliers. The MARKER OUT connector receives

signal is present. When a positive-going signal appears,

signals selected by the pushbutton switches, through a

diode V760 ceases conduction, thus allowing the grid

series isolation resistor for each divider circuit.

and cathode to follow the signal excursion. When the

5-19.

Trigger Out Connector

signal passes, diode V760 and its associated circuitry

(fig. 5-8)

clamp the grid to --7 volts. The pulses at the TRIGGER

The TRIGGER OUT connector receives the individual

OUT connector will always start about +6.5 volts. The

signals of 10w sec, 100, u sec, 1 msec, 10 msec, 100

amplitude of the pulses will depend upon the input signal

msec. These signals are fed to cathode follower V750A

at the grid of V750A.

and are capacitive-coupled to V750B through C752. The

dc level of the signal is a function of the signal repetition

Figure 5-8 Trigger cathode follower and switching, schematic diagram.

(Located in back of manual)

5-4