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The 7904A re-implements the vertical amplifier using Hypcon-packaged amplifier chips designed for the [[7104]], such as the [[155-0178-00]]. | The 7904A re-implements the vertical amplifier using Hypcon-packaged amplifier chips designed for the [[7104]], such as the [[155-0178-00]]. | ||
The 7904 had an elaborate 5-decade built-in calibrator with variable rate that was dropped from the 7904A. The [[7904 remote control connector|rear remote control connector]] unique to | The 7904 had an elaborate 5-decade built-in calibrator with variable rate that was dropped from the 7904A. The [[7904 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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