7CT1N: Difference between revisions
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Internally, a variable-amplitude 55 Hz triangle-wave source supplies a transformer to step up the drive voltage and | Internally, a variable-amplitude 55 Hz triangle-wave source supplies a transformer to step up the drive voltage and | ||
decouple it from ground (Emitter terminal). A step source supplies base current or gate voltage to the DUT. | decouple it from ground (Emitter terminal). A step source supplies base current or gate voltage to the DUT. | ||
The amplifier for the current axis can be switched into a | |||
The amplifier for the current axis can be switched into a ×1000 mode | |||
to detect leakage currents (of typical 1970s semiconductors, anyway). | to detect leakage currents (of typical 1970s semiconductors, anyway). | ||
{{BeginSpecs}} | {{BeginSpecs}} | ||
{{Spec | DUT drive voltage (C-E) | | {{Spec | DUT drive voltage (C-E) | | ||
* positive (NPN or N channel) or negative (PNP or P channel) half-waves | * positive (NPN or N-channel) or negative (PNP or P-channel) half-waves | ||
* 7.5 V, 0.5 V/Div, 240 mA peak | * 7.5 V, 0.5 V/Div, 240 mA peak | ||
* 30 V, 2 V/Div, 60 mA peak | * 30 V, 2 V/Div, 60 mA peak | ||
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* peak power 500 mW}} | * peak power 500 mW}} | ||
{{Spec | DUT current display | | {{Spec | DUT current display | | ||
* | * 10 μA/Div to 20 mA/Div, 1−2−5 steps (×1 mode) | ||
* 10 nA/Div to | * 10 nA/Div to 20 μA/Div, 1−2−5 steps (×1000 mode)}} | ||
{{Spec | Base/Gate drive | | {{Spec | Base/Gate drive | | ||
* 0 to at least 10 steps | * 0 to at least 10 steps | ||
* dual polarity | * dual polarity | ||
* variable offset, at least +/ | * variable offset, at least +/− 5 steps | ||
* current mode: | * current mode: 1 μA/Step to 1 mA/Step in 1−2−5 sequence | ||
* voltage mode: 1 mV/ | * voltage mode: 1 mV/Step to 1 V/Step in 1−2−5 sequence (via 1 kΩ current limiting resistor) | ||
}} | }} | ||
{{Spec | DUT connection | Three 4 mm jacks / binding posts}} | {{Spec | DUT connection | Three 4 mm jacks / binding posts}} | ||
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<gallery> | <gallery> | ||
tek-7ct1n-front.jpg | 7CT1N front | tek-7ct1n-front.jpg | 7CT1N front | ||
tek-7ct1n-left.jpg | tek-7ct1n-left.jpg | 7CT1N left side | ||
tek-7ct1n-right.jpg | 7CT1N right side | tek-7ct1n-right.jpg | 7CT1N right side | ||
7ct1n-bc337.jpg | 7ct1n-bc337.jpg | 7CT1N tracing a BC337 NPN Si transistor | ||
Tek 7ct1n trace.jpg | Tek 7ct1n trace.jpg | ||
Tek 7ct1n schematic2.png | Tek 7ct1n schematic2.png | ||
Tek 7ct1n td.jpg| | Tek 7ct1n td.jpg | 10 mA tunnel diode. 7A13 is set to 10 mV/div for ×10 horizontal expansion. | ||
</gallery> | </gallery> | ||