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Model 415E
Section V
Table 5-2
Table 5-2. Performance Tests (Cont'd)
g. Switch 355D to 60 db and 415E to 30.
415E
should read 1. 0 db ±0.1 db.
h. Switch 355D to 40 and set 415E GAIN control
to minimum. Adjust Oscillator for 1.0 reading
on 415E meter. Switch 415E to 40 db and 355D to
60. 415E should read 1.0 ±0.05 db.
i. Switch 355D to 80 db and 415E to 50.
415E
should read 1. 0 db ±0.1 db.
j. Switch 355D to 100 db and 415E to 60.
415E
should read 1. 0 db ±0.1 db.
_____
3B.
EXPANDED RANGE ACCURACY:
Maximum cumulative error between any two 2 db steps: ±0. 05 db Accuracy on any 0 to 2 db scale:
±0.02 db
Procedure.
Readings
a. Set 415E as in steps a and b of procedure 3A
above.
b.
Set 355D to 10 dband 35*5£ to 0 db. (See Note 1)
c. Adjust Oscillator output and 415E VERNIER
for 0 db meter reading on 0 to 2 db scale.
d. Switch355C fromO to 4 db in 1-db steps. The
Model 415E meter reading should be as given below:
Model 355C
Model 415E
b_Q..,...5, i.Q.,,.0.2.db.
b
1.0 ±0.02 db
b
1. 5 ±6. OlTdb
b
2. 0 ±0. 02 db
e. Change 355C to 0, adjust 200CD for 415E
reading of 1.0 on 0 to 2 db scale. Change expand
to 2 and 355Cto4. The Model 415E should indicate
1 db ±0.05 db on 0 to 2 db scale.
f. Change 355C to 8 db and EXPAND to 4. The
415E should read 1 db ±0.05 db.
g. Switch 355D to 20 db and 355C to 2 db and EX¬
PAND to 6. The 415E should read 1 db ±0.05 db.
h. Switch 355C to 6 db and EXPAND to 8.
The
415E should read 1 db ±0.05 db.___
4, INPUT FREQUENCY: 1000 cps, adjustable 7% (±35 g
Procedure.
a. Connect equipment as shown in Figure 5-1
(omit 355D and AC Voltmeter from setup).
b. Set 355C to 10 db.
c. Set 415E to LOW, ON, 0 (EXPAND), with GAIN,
FREQ, and VERNIER full clockwise.
0. 48 db
0,98 db
1. 48 db
1.98 db
1.95 db
3.95 db
6 . s ?
ls_L_
Readings
1020 cps
0.52 db
1. 02 db
1.52 db
2. 05 db
4.05 db
6. 05 db
8.05 db
ioZu.
980 cps
d. Tune Oscillator to peak 415E (meter needle
to right).
Record Counter reading.
e. Turn FREQ full counterclockwise.
f. Tune Oscillator to peak 415E. Record Counter
reading.
The difference between the recorder fre¬
quency readings of steps d and f must be at least
70 cps with 1000 cps between the two frequencies.
02152-3
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