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7A19: Difference between revisions
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no gain control
(year per July 1971 catalog) |
(no gain control) |
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| Line 14: | Line 14: | ||
The 7A19 is a one-channel vertical plug-in for [[7000-series scopes]]. | The 7A19 is a one-channel vertical plug-in for [[7000-series scopes]]. | ||
An option (#4) was available that added a variable signal delay, intended to match timing between multiple channels. | It has no variable gain control. An option (#4) was available that added a variable signal delay, intended to match timing between multiple channels. | ||
The pre-charge setting on the input coupling switch is intended for situations where there might be residual charge on the input coupling capacitor that could overload the input. To use it, one sets the switch to PRE-CHG before connecting the | The pre-charge setting on the input coupling switch is intended for situations where there might be residual charge on the input coupling capacitor that could overload the input. To use it, one sets the switch to PRE-CHG before connecting the input signal, then waits two seconds before switching to AC (LF point is 1 kHz). The PRE-CHG setting also serves as a ×100 attenuator having a 5 kΩ input impedance in series with 2 μF, extending LF cutoff down to 20 Hz. In the AC GND position, the input is disconnected from the amplifier and terminated in a capacitively coupled 50 Ω load. | ||
The 7A19 uses the [[155-0068-00]] amplifier IC. | The 7A19 uses the [[155-0068-00]] amplifier IC. | ||