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561: Difference between revisions
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The original 561 and RM561 were introduced in 1961. | The original 561 and RM561 were introduced in 1961. | ||
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. Some later plugins intended for use with the 561A or 561B have higher power requirements and may not be compatible with the 561. | ||
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. | 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. | ||