Figure 14. Coaxial relays and attenuators, simplified schematic diagram.

Figure 14. Coaxial relays and attenuators, s i m p l i f i e d s c h e m a t i c d i a g r a m .

and adapter CP703 to the input of

SHUNT CAL position are the following:

20-db fixed attenuator AT701. The

(1) Rf signal path. The rf signal con-

c a l i b r a t i n g signal is attenuated by

netted to SIGNAL INPUT jack J705

20 db and is coupled through adapter

i s conducted through right-angle

CP702 to mating jack J708 on relay

adapter CP701 to jack J707 on

K701.

coaxial relay K701. The coil of re-

(a) T h e movable arm on the upper

lay K701 is deenergized when cal-

set of contacts of K701 (now de-

ibration switch S706 is set to

energized) couples the attenuated

S H U N T CAL position. Therefore,

i m p u 1 s e generator calibrating

the movable arm on the lower set

v o l t a g e from jack J708 through

of contacts provides a short circuit

jack J709 and cable assembly

to chassis ground for the incoming

W701 to signal attenuator AT702.

r f signal.

T h e signal path from AT702 is

(2) Impulse generator signal path. T h e

i d e n t i c a l with that described in

o u t p u t of impulse generator G701

p a r a g r a p h a(1) above.

i s applied through plug P709 and

(b) Figure 14 shows that the movable

mating jack J713 on coaxial relay

arm on the lower set of contacts

K702. Since the coil of relay K702

o f relay K702 (now energized)

i s energized in the SHUNT CAL

a p p l i e s chassis ground potential

position of S706, the movable arm

t h r o u g h adapter CP704 to IM-

on the upper set of contacts creates

PULSE OUTPUT jack J717. This

a path of continuity for the impulse

circuit condition insures that the

generator signal through jack J714