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7912: Difference between revisions
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==R7912== | ==R7912== | ||
The '''R7912''', introduced in 1974, achieved a bandwidth of 500 MHz with a [[7A19]] vertical amplifier plug-in. It was also possible, like in the [[7904]] scope, to access the CRT deflection plates directly through a [[7A21N]] plug-in and achieve a bandwidth of 1 GHz, albeit at reduced sensitivity and loss of triggering and readout functions. | The '''R7912''', introduced in 1974, achieved a bandwidth of 500 MHz with a [[7A19]] vertical amplifier plug-in. It was also possible, like in the [[7904]] scope, to access the CRT deflection plates directly through a [[7A21N]] plug-in and achieve a bandwidth of 1 GHz, albeit at reduced sensitivity (4 V/Div) and loss of triggering and readout functions. | ||
The R7912 had a proprietary digital interface. A card for interfacing to a DEC PDP-11 was available. | The R7912 had a proprietary digital interface. A card for interfacing to a DEC PDP-11 was available. | ||
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The reading of the target is asynchronous to the sweep and therefore the tube can be considered a form of scan converter. | The reading of the target is asynchronous to the sweep and therefore the tube can be considered a form of scan converter. | ||
Three output methods are provided: NTSC-out, X-Y low-speed analog, and a [[GPIB interface]] | Three output methods are provided: NTSC-out, X-Y low-speed analog, and a [[GPIB interface]]. | ||
With aftermarket modifications to the electronics, 7912AD bandwidths have been extended up to 3 GHz in special cases. | With aftermarket modifications to the electronics, 7912AD bandwidths have been extended up to 3 GHz in special cases. | ||