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647A: Difference between revisions
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The '''Tektronix 647A''' is an improved version of the [[647]], with the main enhancement being doubling the bandwidth to 100 MHz. | The '''Tektronix 647A''' is an improved version of the [[647]], with the main enhancement being doubling the bandwidth to 100 MHz. | ||
Tek also introduced | Tek also introduced two new plug-ins with the 647A. | ||
The [[10A2A]] is an improved version of the dual channel [[10A2]] vertical plug-in, with bandwidth extended to 100 MHz. | The [[10A2A]] is an improved version of the dual channel [[10A2]] vertical plug-in, with bandwidth extended to 100 MHz. | ||
The [[11B2A]] is similar to the [[11B2]] dual time base, but triggers up to 100 MHz. | The [[11B2A]] is similar to the [[11B2]] dual time base, but triggers up to 100 MHz. | ||
The [[10A1]] differential comparator amplifier, first introduced in 1965 for the [[647]], has a maximum bandwidth of 55 MHz for sensitivities of 5 mV/div and higher in the 647A. | |||
It operates down to 1 mV/div sensitivity, and includes a comparison voltage mode with a calibrated DC offset similar to that first offered in the [[W|type W]] plug-in. | It operates down to 1 mV/div sensitivity, and includes a comparison voltage mode with a calibrated DC offset similar to that first offered in the [[W|type W]] plug-in. | ||
In total, only | In total, only 6 plug-ins were developed for the 647 series – the generic dual trace vertical [[10A2]] and [[10A2A]] amplifiers, | ||
a differential vertical, and a single and | a differential comparator vertical [[10A1]] amplifier, and a single [[11B1]] and dual [[11B2]] and [[11B2A]] time bases. | ||
Although it combined high performance with rugged reliability and compactness, the 647 series was one of Tek’s “orphan” scope series, a result of when it was introduced. | Although it combined high performance with rugged reliability and compactness, the 647 series was one of Tek’s “orphan” scope series, a result of when it was introduced. | ||
By the time the 100 MHz 647A was announced, the majority of the R&D effort at Tek was devoted to the [[7000-series scopes|7000 series]], which introduced just two years later, in 1969. | By the time the 100 MHz 647A was announced, the majority of the R&D effort at Tek was devoted to the [[7000-series scopes|7000 series]], which introduced just two years later, in 1969. | ||