Interad 7121R: Difference between revisions
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The '''Interad 7121R''' is a VHF/UHF Spectrum Receiver made by [[Interad Ltd]] based on a modified [[5111|Tektronix 5111 storage scope]], with an application-specific plug-in. | The '''Interad 7121R''' is a VHF/UHF Spectrum Receiver made by [[Interad Ltd]] based on a modified [[5111|Tektronix 5111 storage scope]], with an application-specific plug-in. | ||
This system was a Spectrum Surveillance system used by spooks to monitor and intercept RF emissions back in the good ol' Cold War days. The unit in question is early '70's vintage. You could sweep 1-1000 MHz and stare at the screen to see what was popping up, then narrow the span to "home in" in on the emitter, finally switching to a manual fixed tune mode and actually demodulate and listen to the offending signal to see if it was a "bug" or some other undesirable covert emitter. | This system was a Spectrum Surveillance system used by spooks to monitor and intercept RF emissions back in the good ol' Cold War days. The unit in question is early '70's vintage. You could sweep 1-1000 MHz and stare at the screen to see what was popping up, then narrow the span to "home in" in on the emitter, finally switching to a manual fixed tune mode and actually demodulate and listen to the offending signal to see if it was a "bug" or some other undesirable covert emitter. | ||
Latest revision as of 14:52, 9 August 2021
The Interad 7121R is a VHF/UHF Spectrum Receiver made by Interad Ltd based on a modified Tektronix 5111 storage scope, with an application-specific plug-in.
This system was a Spectrum Surveillance system used by spooks to monitor and intercept RF emissions back in the good ol' Cold War days. The unit in question is early '70's vintage. You could sweep 1-1000 MHz and stare at the screen to see what was popping up, then narrow the span to "home in" in on the emitter, finally switching to a manual fixed tune mode and actually demodulate and listen to the offending signal to see if it was a "bug" or some other undesirable covert emitter.
Key Specifications
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Prices
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See Also
5000 Series plug-in interface
5103
5111 (5103/D11)
5113 (5103/D13)
5115 (5103/D15)
Pictures
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Interad 7121R front view
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Interad 7121R front mainframe view
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Interad 7121R front panel view
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Interad 7121R left side mainframe view
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Interad 7121R right side mainframe view
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Interad 7121R rear left panel view
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Interad 7121R rear right panel view
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Interad 7121R rear view
