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517: Difference between revisions
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The 517 uses 24 kV total acceleration voltage on the CRT. | The 517 uses 24 kV total acceleration voltage on the CRT. | ||
This is generated by the [[420|Type 420]] High Voltage Power Supply subsystem in the 517. | This is generated by the [[420|Type 420]] High Voltage Power Supply subsystem in the 517. | ||
It uses a 1.8 kHz oscillator to produce the high voltage, | It uses a 1.8 kHz oscillator to produce the high voltage, unlike other Tek scopes which use HV oscillators in the ultrasonic range. | ||
unlike other Tek scopes which use HV oscillators in the ultrasonic range. | |||
The 517 has a switch on the front panel that selects between | The 517 has a switch on the front panel that selects between normal vertical sensitivity, which uses the full 24 kV acceleration voltage, | ||
normal vertical sensitivity, which uses the full 24 kV acceleration voltage, | and "X2" mode, which drops the acceleration voltage to 12 kV for a doubling of the vertical sensitivity. | ||
and "X2" mode, which drops the acceleration voltage to 12 kV | The control works by switching the voltage division ratio of the feedback to the error amplifier in the HV supply. | ||
for a doubling of the vertical sensitivity. | |||
The control works by switching | |||
of the feedback to the error amplifier in the HV supply. | |||
== CRTs Used in the 517 == | == CRTs Used in the 517 == | ||