36,756
edits
7A19: Difference between revisions
Jump to navigation
Jump to search
m
no edit summary
No edit summary |
mNo edit summary |
||
| Line 16: | Line 16: | ||
==Operation== | ==Operation== | ||
The 7A19 has no variable gain control. An option (#4) was available that added a variable signal delay ( | The 7A19 has no variable gain control. An option (#4) was available that added a variable signal delay (±0.5 ns implemented using a mechanically variable passive delay line), 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 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 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. | ||
| Line 23: | Line 23: | ||
{{Spec | Input impedance | 50 Ω }} | {{Spec | Input impedance | 50 Ω }} | ||
{{Spec | Bandwidth | 600 MHz (500 MHz in [[7904]]) }} | {{Spec | Bandwidth | 600 MHz (500 MHz in [[7904]]) }} | ||
{{Spec | Deflection | 10 mV/Div to 1 V/Div, | {{Spec | Deflection | 10 mV/Div to 1 V/Div, 1−2−5. Pre-charge circuit may be used as a calibrated ×100 attenuator. }} | ||
{{Spec | Maximum input | 2 W average or 50 Div, in AC mode 100 V DC+peak AC }} | {{Spec | Maximum input | 2 W average or 50 Div, in AC mode 100 V DC+peak AC }} | ||
{{Spec | Variable delay (Opt.4) | | {{Spec | Variable delay (Opt.4) | −0.5 ns to +0.5 ns}} | ||
{{EndSpecs}} | {{EndSpecs}} | ||
| Line 45: | Line 45: | ||
<gallery> | <gallery> | ||
7a19-front.jpg | 7A19 without option | |||
Tek 7a19 front.jpg | 7A19 with Opt. 4 (Variable Delay). | |||
</gallery> | </gallery> | ||
===Earlier model === | ===Earlier model === | ||
<gallery> | <gallery> | ||
7a19-early-left.jpg | Left side (early model with Weinschel attenuator, without Opt. 4) | |||
7a19-early-right.jpg | Right side (early model with Weinschel attenuator) | |||
</gallery> | </gallery> | ||