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The Tektronix 1L5 is a low-frequency spectrum analyzer for [[500-series scopes]].
{{Plugin Sidebar 2 |
title=Tektronix 1L5 |
summary=1 MHz Spectrum Analyzer |
image=Tek 1l5 front.JPG |
caption=Tektronix 1L5 |
series=[[500-series scopes]] |
introduced=1967 |
discontinued=1975 |
manuals=
* [http://bama.edebris.com/download/tek/1l5/Tek%201L5_v6.pdf Tektronix 1L5 Manual (PDF)]
* [[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]].


Its center frequency is set on a trio of rotary switches and can range from 50Hz to
Its center frequency is set on a trio of rotary switches and can range from 50 Hz to
990kHz.  Minimum resolution bandwidth is 10Hz.  It has a 1 meg input resistance.
990 kHz.  Minimum resolution bandwidth is 10 Hz.  It has a 1 MΩ input resistance.


Type 1L5 was sold from 1967 or 1968 until the end of the classic plugin scope
Type 1L5 was sold from 1967 until the end of the classic plug-in scope
line after 1974.  Not particularly well calibrated in either frequency, bandwidth,
line.  Not particularly accurate in either frequency, bandwidth,
or amplitude, it was no match for HP's 141T/8556A/8552B combination as performance
or amplitude, it was no match for HP's 141T/8556A/8552B combination in performance,
was concerned, but it was a small fraction of the price.
but it was a small fraction of the price.


Although Type 1L5 can operate in any classic plugin scope*, it is by far the
Although Type 1L5 can operate in any 500-series scope*,
most useful in the Type [[549]] storage mainframe, where it's possible to
it is most useful by far in the Type [[549]] storage mainframe
sweep slowly and take advantage of the narrower resolution bandwidths.
which allows slow sweeps needed to match the narrower resolution bandwidths.


<nowiki>*</nowiki> 531/535/541/545 need a wiring mod to alleviate a
In conjunction with the [[015-0107-00]] "Swept Frequency Generator" (tracking generator),
vertical amp instability.
the 1L5 can also measure frequency response.


<nowiki>*</nowiki> [[531]]/[[535]]/[[541]]/[[545]] need a wiring mod
to alleviate vertical amp instability.
==Pictures==
<gallery>
<gallery>
Image:Tek 1l5 1.jpg
Tek 1l5 1.jpg
Image:Tek 1l5 2.jpg
Tek 1l5 2.jpg
Image:Tek 1l5 3.jpg
Tek 1l5 3.jpg
Image:Tek 1l5 4.jpg
Tek 1l5 4.jpg
Image:Tek 1l5 5.jpg
Tek 1l5 5.jpg
549_1L5.JPG| 549 works fine with 1L5
Tek 1l5 top2.JPG|top
Tek 1l5 right.JPG|right
Tek 1l5 rear.JPG|rear
Tek 1l5 left.JPG|left
Tek 1l5 front.JPG|front
Tek 1l5 bottom.JPG|bottom
Tek 1l5 2409.jpg|1L5
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|Dispertion 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
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>
</gallery>
[[Category:Spectrum analyzers]]
[[Category:500 series plugins]]

Revision as of 09:28, 2 November 2019

Template:Plugin Sidebar 2 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 Generator" (tracking generator), the 1L5 can also measure frequency response.

* 531/535/541/545 need a wiring mod to alleviate vertical amp instability.

Pictures

  • 549 works fine with 1L5

    549 works fine with 1L5

  • top

    top

  • right

    right

  • rear

    rear

  • left

    left

  • front

    front

  • bottom

    bottom

  • 1L5

    1L5

  • Block Diagram

    Block Diagram

  • Attenuators and Input

    Attenuators and Input

  • Center Frequency Switching

    Center Frequency Switching

  • Swept Frequency Generator

    Swept Frequency Generator

  • Variable Resolution Amplifier

    Variable Resolution Amplifier

  • Dispertion Warning Light

    Dispertion Warning Light

  • Output Amplifier

    Output Amplifier

  • Calibrator

    Calibrator

  • Interconnecting Plug and Power Distribution

    Interconnecting Plug and Power Distribution

  • Preproduction 1L5 (serial A01)

    Preproduction 1L5 (serial A01)

  • Preproduction 1L5 (serial A01)

    Preproduction 1L5 (serial A01)

  • Preproduction 1L5 (serial A01)

    Preproduction 1L5 (serial A01)

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