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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]].
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 plug-in scope
Type 1L5 was sold from 1967 until the end of the classic plug-in scope
line after 1974.  Not particularly accurate 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 in performance,
or amplitude, it was no match for HP's 141T/8556A/8552B combination in performance,
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 plug-in scope*, it is most useful by far
Although Type 1L5 can operate in any 500-series scope*,
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 with the narrower resolution bandwidths.   
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.   


<nowiki>*</nowiki> [[531]]/[[535]]/[[541]]/[[545]] need a wiring mod  
<nowiki>*</nowiki> [[531]]/[[535]]/[[541]]/[[545]] need a wiring mod  
to alleviate vertical amp instability.
to alleviate vertical amp instability.


* [http://bama.edebris.com/download/tek/1l5/Tek%201L5_v6.pdf Tektronix 1L5 Manual (PDF)]
==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
Image:549_1L5.JPG| 549 works fine with 1L5
549_1L5.JPG| 549 works fine with 1L5
File:Tek 1l5 top2.JPG|top
Tek 1l5 top2.JPG|top
File:Tek 1l5 right.JPG|right
Tek 1l5 right.JPG|right
File:Tek 1l5 rear.JPG|rear
Tek 1l5 rear.JPG|rear
File:Tek 1l5 left.JPG|left
Tek 1l5 left.JPG|left
File:Tek 1l5 front.JPG|front
Tek 1l5 front.JPG|front
File:Tek 1l5 bottom.JPG|bottom
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