EXTENSION COURSE OF THE US ARMY SIGNAL SCHOOL
LESSON SOLUTIONS
SIGNAL SUBCOURSE 333...................... Telephone System Characteristics
LESSON 4 .................................. Equalization
1. d--para 4-1a(3)
2. d--para 4-1b(2)
3. a--para 4-lb(3)
4. a--para 4-1b(3), (4)
5. b--para 4-2b(l), (2); fig. 4-2
6. c--para 4-2a(3)
7. c--para 4-2a
8. c--para 4-3a, fig. 4-7
9. c--para 4-3a, fig. 4-7
10. b--para 4-3a, fig. 4-7
11. d--para 4-3a(3)
Parameter limits lie between 1.5 and 2.5 ms. The maximum variation of the
uncorrected circuit curve lies between 1.8 and 2.0 ms over the range of 1,000
to 2,000 Hz, well within limits. The circuit conditioner need take no action
to equalize the circuit.
12. c--para 4-3c, fig. 4-4
The 10-db fixed-gain amplifier will compensate for the 10-db loss in the
equalizer sections. The 25-db amplifier must raise the input level of -16 dbm
to the output level of +5 dbm, a total of 21 db. Therefore, 21-db gain of the
25-db amplifier is needed.
13. d--para 4-3b, c
14. d--para 4-4
15. c--para 4-5a
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