EIA Test Theory.

TM 9-4931-363-14&P

k. Refer to step 10 in figure 2-6 and in the EIA test

14) to the meter and to the A2 card. (Jl-t is not connected

in the EIA from XM128.)

table. Setting S8 to position 8 connects 18 volts from the

EIA through J2-a to the meter in the test set.

u. Refer to step 20 in figure 2-6 and in the EIA test

l. Refer to step 11 in figure 2-6 and in the EIA test

table. Test signal Gi from the EIA (from XMl36) is

table. Setting S8 to position 9 connects 12 volts from the

connected through EIA J1-u, J2-B of the test set, contact 8

EIA through J2-X to the meter in the test set.

and wiper 1 of S3-K, and the contacts described in o (step

14) to the meter and to the A2 card. (J1-u is not connected

m. Refer to step 12 in figure 2-6 and in the EIA test

in the EIA from XM128.)

table. Setting S8 to position 10 connects 5 volts from the

EIA through J2-Y to the meter in the test set.

v. Refer to step 21 in figure 2-6 and in the EIA test

table. The output of T3-1, the pilot ac reticle output, is

n. Refer to step 13 in figure 2-6 and in the EIA test

connected through J1-d, through J1-EE, through contact 9

table. Setting S8 to position 11 connects -6 volts from the

and wiper 1 of S3-K, and through the contacts described in

EIA through J2-Z to the meter in the test set.

o (step 14) to the meter and to the A2 card. R26 in the test

set simulates the parallel load of the three lamps in a typical

o. Refer to step 14 in figure 2-6 and in the EIA test

pilot reticle lamp assembly.

table. The output of T2-1 in the EIA is connected through

J2-A, through J1-i, through contact 2 and wiper 1 of S3-K,

w. Refer to step 22 in figure 2-6 and in the EIA test

through contact 3 and wiper 1 of S4-H, through contacts 1

table. The output of T3-4, the gunner ac reticle output, is

and 3 of S9 set to position R3, and through contact 2 and

connected through J1-e, through J1-HH, through contact

wiper 1 of S5-A to the meter, and through contact 8 and

10 and wiper 1 of S3-K, and through the contacts described

wiper 2 of S5-A to the phase-determining input of card A2

in o (step 14) to the meter and to the A2 card. R25 in the

at XA2-41.

test set simulates the parallel load of the three lamps in a

typical gunner reticle lamp assembly.

p. Refer to step 15 in figure 2-6 and in the EIA test

table. The output of T2-4 in the EIA is connected through

x. Refer to step 23 in figure 2-6 and in the EIA test

J2-B, through J1-j, through contact 3 and wiper 1 of S3-K,

table. Test signal Gj from the EIA (from XM136) is

and through the contacts described above to the meter and

connected through EIA J1-v, J2-b of the test set, contact

to the A2 card.

11 and wiper 1 of S3-K, and the contacts described in o

(step 14) to the meter and to the A2 card. (Jl-v is not

q. Refer to step 16 in figure 2-6 and in the EIA test

connected in the EIA from XM128.)

table. Test signal A (test signal Pj) in the EIA is connected

through J2-C, through J1-k, through contact 4 and wiper 1

of S3-K, and through the contacts described in o (step 14)

y. Refer to step 24 in figure 2-6 and in the EIA test

to the meter and to the A2 card.

table. The 5 volts ac, phase angle 0 degrees, is connected

through wiper 1 and contact 4 of S4-F, through wiper 1

r. Refer to step 17 in figure 2-6 and in the EIA test

and contact 10 of S3-C, through J1-a, and through J1-BB to

table. Test signal B (test signal Pi) in the EIA is connected

the in-phase end of variable resistors R1 through R4 in the

through J2-D, through J1-m, through contact 5 and wiper 1

EIA. The 5 volts ac, phase angle 180 degrees, is connected

of S3-K, and through the contacts described in o (step 14)

through wiper 1 and contact 4 of 84-G, through wiper 1

to the meter and to the A2 card.

and contact 10 of S3-D, through J1-b, and through J1-CC

to the out-of-phase end of variable resistors R1 through R4

s. Refer to step 18 in figure 2-6 and in the EIA test

in the EIA. The gunner azimuth error signal output from

table. Test signal C (test signal TR) in the EIA is connected

the A13 card in the EIA is connected through J1-P, through

through J2-E, through J1-n, through contact 6 and wiper 1

J1-P in the test set, through contacts 5 and 6 of S9 set to

of S3-K, and through the contacts described in o (step 14)

position R2, and through contact 3 and wiper 1 of S5-A

to the meter and to the A2 card.

and TB1-3 to the meter, and through contact 9 and wiper 2

of S5-A to XA2-41. With no input signal to the A13 card

from the linkage, R2 is adjusted for a null. (The inputs to

t. Refer to step 19 in figure 2-6 and in the EIA test

amplifier card Al3 in the EIA are grounded through EIA

table. Test signal Gk from the EIA (from XM136) is

J3-43 and J4-39 to insure that the readout is not affected

connected through EIA J1-t, J2-A of the test set, contact 7

by these inputs during this zeroing.)

and wiper 1 of S3-K, and the contacts described in o (step

2-19