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|  MIL-R-48577(AR)
AMENDMENT 1
The-frequency of applied vibration shall be swept
logarithmically in 15 minute 1 minute sweep cycles for a
total of two hours per axis.
PAGE 3
Paragraph 3.3.5, Delete and substitute:
"3.3.5 Vibration "B".-This requirement shall be met with
24 6 Vdc applied and an output current of 500 ma 25 ma.
The vibration shall be sinusoidal as follows:
At a frequency of 5 Hertz (Hz), the acceleration
shall be l.O G 10%.
b. During a frequency sweep of 5 to 500 Hz, maintain
constant acceleration of 1.0 G 10%.
During a frequency sweep of 500 to 5 Hz, maintain
constant acceleration of 1.0 G 10%.
At 5 Hz, the acceleration shall be 1.0 G 10%.
d.
The frequency of applied vibration shall be swept logarith-
mically in 15 minute 1 minute sweep for a total of 15 minutes
1 minute along each of the three mutually perpendicular axes
(total vibration time 45 minutes + 3 minutes). Following the
vibration test, the regulator shall meet the requirements of
3.4."
Paragraph 3.4.4.1, Delete and substitute:
"3.4.4.1 Input voltage surge.-The regulator shall show no
evidence of damage and the output voltage shall remain within
2.0 to 3.0 volts during the application of 100 millisecond
positive square wave pulses having an amplitude of 80.0 1.0
DC volts. The output voltage shall return to the level speci-
fied in 3.4.4.3 within 125 milliseconds after removal of
pulses."
Paragraph 3.4.4.3, Delete and substitute:
"3.4.4.3 Output voltage.-The regulator shall deliver a dc
voltage of 2.5 .3 volts with a rise time of 0.3 seconds or
less upon opening test shutter switch."
Page 2 of 4
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