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1401: Difference between revisions
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of 1 MHz to 500 MHz, designed to be used with an external oscilloscope, typically a [[323]], | of 1 MHz to 500 MHz, designed to be used with an external oscilloscope, typically a [[323]], | ||
[[324]] or [[326]]. It has internal rechargable NiCd batteries and can also operate | [[324]] or [[326]]. It has internal rechargable NiCd batteries and can also operate | ||
from AC power (using an unusual power cord) or external DC from 6 V to 16 V. | from AC power (using an unusual power cord) or external DC from 6 V to 16 V. | ||
The 1401's case, like the [[1501|1501 TDR]]'s, is the same size as the 323/324 case and designed to be stacked with the scope. | |||
The | The external oscilloscope is assumed to have 10 horizontal divisions and 6 vertical divisions. Tektronix says it is compatible with any oscilloscope having 0.5 V/div horizontal deflection factor and 1.2 V full screen vertical deflection. | ||
divisions and 6 vertical divisions. Tektronix says it is compatible with any | Note that most full sized Tektronix oscilloscopes have 8 vertical divisions so use care when doing the initial setup and reading the scale in dBm. Also note the lack of a Z-axis output. | ||
oscilloscope having 0.5 V/div horizontal deflection factor and 1.2 V full screen | |||
vertical deflection. Note that most full sized Tektronix | |||
oscilloscopes have 8 vertical divisions so use care when doing the | |||
initial setup and reading the scale in dBm. Also note the lack of a Z-axis | |||
output. | |||
There appear to be two variants of the 1401A, both the manual and | There appear to be two variants of the 1401A, both the manual and catalog specify the resolution bandwidth selector as 1000, 100 and 3 kHz, but the later versions are 1000, 100, and 10 kHz. | ||
catalog specify the resolution bandwidth selector as 1000, 100 and 3 kHz, | There is also a 1401A-1 which has a 75 Ω input impedance. | ||
but the later versions are 1000, 100, and 10 kHz. There is also a 1401A-1 | The predecessor 1401 did not have the BNC "cal output" or "cal on" pushbutton switch. | ||
which has a 75 Ω input impedance. The predecessor 1401 did not have | |||
the BNC "cal output" or "cal on" pushbutton switch. | |||
==Internals== | ==Internals== | ||
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==Pictures== | ==Pictures== | ||
<gallery> | <gallery> | ||
Tek1401a-front.jpg|Front panel | |||
Tek1401a-top.jpg|Top PCB: IF board | |||
Tek1401a-bottom.jpg|Bottom PCBs:gate/cal, power supply | |||
Tek1401a-batterypcb.jpg|PCB on the battery pack | |||
Tek1401a-logamp.jpg | [[Tektronix Cartoons | Cartoon in schematic diagram]]: "Log Amp" | |||
</gallery> | </gallery> | ||