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The Tektronix 7B92A Dual Time Base is recommended for use only in the 7800 and 7900 Series Mainframes. Features: 0.5 ns/div to 0.2 s/div Calibrated Time Base. Triggering to 500 MHz. Alternate Display of Intensified. Delaying and Delayed Sweeps. Contrast Regulation between. Delaying and Delayed Sweeps. Sweep Rate - 0.2 s/div to 10 ns/div in 23 calibrated steps (1-2-5 sequence) . An uncalibrated variable rate is continuous between steps, and extends sweep rate to at least 0.5 s/div. The VARIABLE control is internally switchable between delaying and delayed sweeps. Delay Time Multiplier Range - 0 to 9.8 times the DLY TIME/DIV setting from 0.2 s/div to 10 ns/div (0 to 1.96 seconds). Internal Trigger Jitter - 50 ps or less at 500 MHz. External Trigger Input - Selectable 50 ohm or 1 M-ohm inputs (1 M-ohm is paralleled by approx 20 pF). Max safe input is 250 V (dc + peak ac) for 1 M-ohm input, and 1 W average for 50 ohm input. Range of trigger level is at least ±3.5 V in EXT, and at least ±35 V in EXT + 10.
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