1L5: Difference between revisions
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The Tektronix 1L5 is a low-frequency spectrum analyzer for [[500-series scopes]]. | {{Plugin Sidebar | ||
|manufacturer=Tektronix | |||
|series=500-series scopes | |||
|type=1L5 | |||
|summary=1 MHz Spectrum Analyzer | |||
|image=Tek 1L5 front4.jpeg | |||
|caption=Tektronix 1L5 | |||
|introduced=1967 | |||
|discontinued=1975 | |||
|manuals= | |||
* [[Media:070-0600-01.pdf|Tektronix 1L5 Manual]] | |||
* [[Media:Tek 1l5 fcp sep 1967.pdf|Tektronix 1L5 Factory Calibration Procedure, September 1967]] | |||
}} | |||
The '''Tektronix 1L5''' is a low-frequency spectrum analyzer for [[500-series scopes]]. | |||
It is very similar to the [[3L5]]. | It is very similar to the [[3L5]]. | ||
Its center frequency is set on a trio of rotary switches and can range from | Its center frequency is set on a trio of rotary switches and can range from 50 Hz to 990 kHz. Minimum resolution bandwidth is 10 Hz. It has a 1 MΩ input resistance. | ||
Type 1L5 was sold from 1967 | Type 1L5 was [[introduced in 1967|sold from 1967]] until the end of the classic plug-in scope line. | ||
line | Not particularly accurate in either frequency, bandwidth, or amplitude, it was no match for HP's 141T/8556A/8552B combination in performance, but it was a small fraction of the price. | ||
or amplitude, it was no match for HP's 141T/8556A/8552B combination in performance, | |||
but it was a small fraction of the price. | |||
Although Type 1L5 can operate in any | Although Type 1L5 can operate in any 500-series scope*, it is most useful by far in the Type [[549]] storage mainframe which allows slow sweeps needed to match the narrower resolution bandwidths. | ||
in the Type [[549]] storage mainframe | |||
In conjunction with the [[015-0107-00]] Swept Frequency Converter (tracking generator), the 1L5 can also measure frequency response. | |||
* [ | <nowiki>*</nowiki> [[531]]/[[535]]/[[541]]/[[545]] need a wiring mod to alleviate vertical amp instability. | ||
{{MissingSpecs}} | |||
==Links== | |||
{{Documents|Link=1L5}} | |||
==Pictures== | |||
'''External''' | |||
<gallery> | |||
Tek 1L5 front2.jpeg | Front panel | |||
Tek 1l5 front.JPG | |||
Tek 1l5 2409.jpg | |||
Tek 1l5 1.jpg | |||
Tek 1l5 2.jpg | |||
Tek 1l5 3.jpg | |||
Tek 1l5 4.jpg | |||
Tek 1l5 5.jpg | |||
Tek 1l5 rear.JPG | Rear | |||
Tek 1L5 rear2.jpeg | |||
</gallery> | |||
'''Internal''' | |||
<gallery> | <gallery> | ||
Tek 1L5 bottom2.jpeg | |||
Tek 1L5 left2.jpeg | |||
Tek 1L5 right2.jpeg | |||
Tek 1L5 top2.jpeg | |||
Tek 1l5 top2.JPG|top | |||
Tek 1l5 right.JPG|right | |||
Tek 1l5 left.JPG|left | |||
Tek 1l5 bottom.JPG|bottom | |||
</gallery> | </gallery> | ||
'''Pre-production unit''' | |||
<gallery> | |||
Preproduction incomplete 1L5.jpg|Preproduction 1L5 (serial A01) | |||
Preproduction incomplete 1L5 left.jpg|Preproduction 1L5 (serial A01) | |||
Preproduction incomplete 1L5 right.jpg|Preproduction 1L5 (serial A01) | |||
</gallery> | |||
'''Measurements, Diagrams''' | |||
<gallery> | |||
549_1L5.JPG | 1L5 works fine in [[549]] | |||
Tek 1L5 3MHz filter response 10db div.jpg|Measured frequency response of 3 MHz filter from P90 to P280 with Q290 removed to disable 3.1 MHz oscillator, but powered up. 10 dB/div. | |||
Tek 1L5 3MHz filter response 1db div.jpg|Measured frequency response of 3 MHz filter. 1 dB/div. | |||
Tek 1l5 block diagram.png|Block Diagram | |||
Tek 1l5 attenuators and input.png|Attenuators and Input | |||
Tek 1l5 center freq switching.png|Center Frequency Switching | |||
Tek 1l5 swept freq gen.png|Swept Frequency Generator | |||
Tek 1l5 var res amp.png|Variable Resolution Amplifier | |||
Tek 1l5 dispersion warning.png|Dispersion Warning Light | |||
Tek 1l5 output amp.png|Output Amplifier | |||
Tek 1l5 calibrator.png|Calibrator | |||
Tek 1l5 plug and power.png|Interconnecting Plug and Power Distribution | |||
</gallery> | |||
==Components== | |||
{{Parts|1L5}} | |||
[[Category:500 series spectrum analyzer plugins]] |
Latest revision as of 02:37, 15 March 2024
The Tektronix 1L5 is a low-frequency spectrum analyzer for 500-series scopes. It is very similar to the 3L5.
Its center frequency is set on a trio of rotary switches and can range from 50 Hz to 990 kHz. Minimum resolution bandwidth is 10 Hz. It has a 1 MΩ input resistance.
Type 1L5 was sold from 1967 until the end of the classic plug-in scope line. Not particularly accurate in either frequency, bandwidth, or amplitude, it was no match for HP's 141T/8556A/8552B combination in performance, but it was a small fraction of the price.
Although Type 1L5 can operate in any 500-series scope*, it is most useful by far in the Type 549 storage mainframe which allows slow sweeps needed to match the narrower resolution bandwidths.
In conjunction with the 015-0107-00 Swept Frequency Converter (tracking generator), the 1L5 can also measure frequency response.
* 531/535/541/545 need a wiring mod to alleviate vertical amp instability.
Key Specifications
- please add
Links
Documents Referencing 1L5
- (no results)
Pictures
External
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Front panel
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Rear
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Internal
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top
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right
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left
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bottom
Pre-production unit
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Preproduction 1L5 (serial A01)
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Preproduction 1L5 (serial A01)
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Preproduction 1L5 (serial A01)
Measurements, Diagrams
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1L5 works fine in 549
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Measured frequency response of 3 MHz filter from P90 to P280 with Q290 removed to disable 3.1 MHz oscillator, but powered up. 10 dB/div.
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Measured frequency response of 3 MHz filter. 1 dB/div.
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Block Diagram
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Attenuators and Input
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Center Frequency Switching
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Swept Frequency Generator
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Variable Resolution Amplifier
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Dispersion Warning Light
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Output Amplifier
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Calibrator
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Interconnecting Plug and Power Distribution
Components
Some Parts Used in the 1L5
Part | Part Number(s) | Class | Description | Used in |
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1N3182 | 152-0269-00 | Discrete component | varactor diode | 3L5 • 1L5 • 3T7 • 492 • 465M • 7844 • 2465 |