1L5: Difference between revisions

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The Tektronix 1L5 is a low-frequency spectrum analyzer for [[500-series scopes]].
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 or 1968 until the end of the classic plug-in scope
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Although Type 1L5 can operate in any classic plug-in scope*, it is most useful by far
Although Type 1L5 can operate in any classic plug-in scope*, it is most useful by far
in the Type [[549]] storage mainframe, where it's possible to
in the Type [[549]] storage mainframe which allows slow
sweep slowly with the narrower resolution bandwidths.   
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.


==Manuals==
* [http://bama.edebris.com/download/tek/1l5/Tek%201L5_v6.pdf Tektronix 1L5 Manual (PDF)]
* [http://bama.edebris.com/download/tek/1l5/Tek%201L5_v6.pdf Tektronix 1L5 Manual (PDF)]


==Pictures==
<gallery>
<gallery>
Image:Tek 1l5 1.jpg
Image:Tek 1l5 1.jpg

Revision as of 02:42, 12 July 2014

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 or 1968 until the end of the classic plug-in scope line after 1974. 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 classic plug-in 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.

Manuals

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

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