A-A-50761
(c) Vibration: vibrated in three planes for 15 min. each with 0.254 mm (0.010 in.) excursion, 10 to 55 Hz.
3. Main Time Base (Plug-in).
a. Sweep
(1) Ranges: from 0.1 µs/div to 1 s/div (22 positions) in 1, 2, 5 sequence. ± 3% accuracy with vernier in calibrated position.
(2) Vernier: continuously variable between all ranges; extends slowest sweep to at least 2.5 s/div.
(3) Magnifier: (on mainframe) expands fastest sweep to 10 ns/div.
(4) Normal: sweep is triggered by an internal, external, or power line signal.
(5) Automatic bright baseline displayed in absence of input signal. Triggering same as normal except low frequency limit is 40 Hz for internal modes.
(6) Single: sweep occurs once with same triggering as normal, reset pushbutton with indicator light.
b. Delayed Time Base: Delayed time base sweeps after a time delay set by Main time base and Delay controls.
(1) Sweep
(2) Ranges: from 0.1 µs/div to 50 ms/div (18 positions) in 1, 2, 5 sequence. ± 3% accuracy with Vernier in calibrated position.
(3) Vernier: continuously variable between all ranges, extends slowest sweep to at least 125 ms/div.
(4) Magnifier: (on mainframe) expands fastest sweep to 10 ns/div.
c. Triggering:
(1) Main Time Base
(a) Internal: refer to vertical amplifier plug-in specifications.
(b) External: from ac to 50 MHz on signals 0.5V p-p or more, increasing to 100 MHz on signals 1V p-p or more.
(c) Line: power line frequency signal.
(d) Level
INTERNAL: at any point on the vertical waveform displayed.
EXTERNAL: Continuously variable from + 30V in + 10 setting.
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