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* [[Media:070-236.pdf|524AD Instruction Manual 070-236]] | * [[Media:070-236.pdf|524AD Instruction Manual 070-236]] | ||
* [[Media:Tek_524AD_OCRed.pdf|524AD Instruction Manual]] (OCR) | * [[Media:Tek_524AD_OCRed.pdf|524AD Instruction Manual]] (OCR) | ||
* [[Media:Tek 524 cal procedure.pdf|524 | * [[Media:Tek 524 cal procedure.pdf|524 Calibration Procedure]] | ||
* [[Media:Tek 524 calibration checklist.pdf|524 Calibration Checklist]] | |||
}} | }} | ||
The '''Tektronix 524AD''' is a monolithic oscilloscope [[introduced in 1953]] for monitoring television waveforms, designed by [[Cliff Moulton]]. | The '''Tektronix 524AD''' is a monolithic oscilloscope [[introduced in 1953]] for monitoring television waveforms, designed by [[Cliff Moulton]]. | ||
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In a 1972 interview, [[Charlie Rhodes]] recalled: | In a 1972 interview, [[Charlie Rhodes]] recalled: | ||
<blockquote> | <blockquote> | ||
In 1953 Cliff Moulton re-designed the [[514]] for TV station needs. This became the 524, the first TV-oriented instrument. It looked like a market of 200 or so in those days, but wound up producing 10,000 of this model. | In 1953 Cliff Moulton re-designed the [[514]] for TV station needs. | ||
This became the 524, the first TV-oriented instrument. | |||
It looked like a market of 200 or so in those days, but wound up producing 10,000 of this model. | |||
</blockquote> | </blockquote> | ||
Interestingly, the 524 appears on page 31 of the [https://www.w140.com/RCA-Test-Equip-1966.pdf 1966 RCA Test Equipment Catalog]. | Interestingly, the 524 appears on page 31 of the [https://www.w140.com/RCA-Test-Equip-1966.pdf 1966 RCA Test Equipment Catalog]. | ||
{{ | {{BeginSpecs}} | ||
{{Spec | Bandwidth | DC to 10 MHz @ ≥150 mV/div; with preamp, 2 Hz to 10 MHz down to 15 mV/div }} | |||
{{Spec | Rise time | 40 ns }} | |||
{{Spec | Deflection | variable from 15 mV/div to 50 V/div }} | |||
{{Spec | Input | 1 MΩ // 45 pF; 10 MΩ // 15 pF with [[P510A]] ×10 probe }} | |||
{{Spec | Sweep | 100 ns/div to 10 ms/div, ×3 and ×10 magnifier }} | |||
{{Spec | Time markers | 1 μs, 100 ns, 50 ns, 318 ns, 1.59 μs (200 or 40 markers per TV line) }} | |||
{{Spec | CRT | [[5ABP1]] (P1 [[phosphor]]) standard, P7 and P11 optional; 4 kV total acceleration (−1.5 kV/+2.5 kV) }} | |||
{{Spec | Power | 500 W }} | |||
{{Spec | Weight | 27.7 kg / 61 lbs }} | |||
{{EndSpecs}} | |||
It uses [[selenium rectifiers]] in the low-voltage power supply. | |||
power supply. | |||
The 524AD has a 56°C/133°F [[thermal cutoff]]. | |||
==Links== | ==Links== | ||
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The vertical signal path of the 524 is similar to that of the [[514]]. | The vertical signal path of the 524 is similar to that of the [[514]]. | ||
They have similar front-ends and similar [[distributed amplifier|distributed vertical output amplifiers]]. | They have similar front-ends and similar [[distributed amplifier|distributed vertical output amplifiers]]. | ||
The vertical amplifier has a three-stage [[distributed amplifier]] section (6×[[6AG7]]). | |||
The video trigger circuitry present in the 524 distinguish it from the 514. | The video trigger circuitry present in the 524 distinguish it from the 514. | ||
Just before the L-C [[delay line]] in the vertical signal path, there is a | Just before the L-C [[delay line]] in the vertical signal path, there is a cathode follower, V15A, that serves as the trigger pickoff buffer. | ||
cathode follower, V15A, that serves as the trigger pickoff buffer. | |||
The resulting trigger signal goes to a video sync separator circuit. | The resulting trigger signal goes to a video sync separator circuit. | ||
Here, the there is clamping and amplification and, | Here, the there is clamping and amplification and, most importantly, a non-retriggerable multivibrator. | ||
most importantly, a non-retriggerable multivibrator. | |||
The multivibrator is triggered by the vertical sync of the NTSC waveform. | The multivibrator is triggered by the vertical sync of the NTSC waveform. | ||
After being triggered, it is not triggerable again for about about 25 ms, so it | After being triggered, it is not triggerable again for about about 25 ms, so it misses the vertical sync of the next interlaced field and instead triggers on the vertical sync of one following that. | ||
misses the vertical sync of the next interlaced field and instead triggers on | So it consistently shows the "even" field or the "odd" field. | ||
the vertical sync of one following that. So it consistently shows the "even" field | There is a switch that perturbs the multivibrator so it can be switched between even and odd fields. | ||
or the "odd" field. There is a switch that perturbs the multivibrator so it can be | The video trigger circuit drives a conventional trigger circuit and sweep circuit similar to that of the 514. | ||
switched between even and odd fields. The video trigger circuit drives a | |||
conventional trigger circuit and sweep circuit similar to that of the 514. | |||
The 524 uses a cylindrical style of ceramic terminal strip, which is less common than the straight style. | The 524 uses a cylindrical style of [[ceramic strips|ceramic terminal strip]], which is less common than the straight style. | ||
The cylindrical style is also used in the [[C|Type C]], [[CA|Type CA]], and [[315]]. | The cylindrical style is also used in the [[C|Type C]], [[CA|Type CA]], and [[315]]. | ||
==Pictures== | ==Pictures== | ||