Rf Chart (fig. 69)

m o d u l a t i o n . Since tuning unit 3 does not

c. Rf Chart (fig. 69). After the tests in

use band switching, set tuning unit 3 signal

b above show that the trouble is not in the

generator and the TUNING dial of tuning

i f . amplifier, the if. step attenuator, and

u n i t 3 to 300 mc (the center of the fre-

the if. preamplifier, proceed with the tests

q u e n c y range). R e f e r t o f i g u r e 6 9 a n d

listed in the chart below. Use tuning unit

proceed as follows:

3 signal generator (para 65) with 400-cps

161