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561: Difference between revisions
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Similar to the 560, also [[introduced in 1961]], the 561 has a round CRT. | Similar to the 560, also [[introduced in 1961]], the 561 has a round CRT. | ||
It supports the 50, 60 and 70 series of plug-ins, with the highest system bandwidth of 4 MHz. | It supports the 50, 60 and 70 series of plug-ins, with the highest system bandwidth of 4 MHz. | ||
The 561 uses the [[T5032]] CRT, which has a glass envelope. The 561 and later versions also had a front panel calibrator signal for calibrating the plugins to the mainframe. The calibrator has 18 attenuation steps and can output a square wave with an amplitude of 200μV to 100V. | The 561 uses the [[T5032]] CRT, which has a glass envelope. The 561 and later versions also had a front panel calibrator signal for calibrating the plugins to the mainframe. The 561 calibrator has 18 attenuation steps and can output a square wave with an amplitude of 200μV to 100V. | ||
===561A=== | ===561A=== | ||