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7904: Difference between revisions
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===7904A differences=== | ===7904A differences=== | ||
The 7904A ([[:Category:Introduced in 1984 |introduced in 1984]]) re- | The 7904A ([[:Category:Introduced in 1984 |introduced in 1984]]) borrows heavily from the previously introduced [[7104]] in terms of front panel layout, mechanical design, and electronics, re-implementing the vertical amplifier using Hypcon-packaged amplifier chips such as the [[155-0178-00]]. | ||
The 7904 had | The 7904 had the elaborate 5-decade built-in calibrator with variable rate that was common on all first-generation 4-bay [[7000-series scopes]], it was dropped from the 7904A. The [[7000-series remote control connector|rear remote control connector]] unique to early 7000-series scopes was dropped as well. | ||
In the 7904A, The Control Illumination switch moved to the rear panel, and the [[7000 series readout system|readout system]] | In the 7904A, The Control Illumination switch moved to the rear panel, and the [[7000 series readout system|readout system]] | ||
gained a pulsed mode in which it is synchronized with the sweep instead of interrupting the display at random times. | gained a pulsed mode in which it is synchronized with the sweep instead of interrupting the display at random times. | ||
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==Operation== | ==Operation== | ||
The 7904 has many modes of operation. | The 7904 has many modes of operation. | ||
One mode is called "Independent-Pairs Display" in the manual, where the input to the left vertical plug-in is displayed using the B horizontal time-base plug-in, | One mode is called "Independent-Pairs Display" in the manual, where the input to the left vertical plug-in is displayed using the B horizontal time-base plug-in, | ||