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The Tektronix 1L40 is a spectrum analyzer plug-in for [[500-series scopes]].
{{Plugin Sidebar 2 |
title=Tektronix 1L40 |
summary=40 GHz Spectrum Analyzer plug-in |
image=Tek 1l40 front.jpg |
caption=1L40 front |
series=[[500-series scopes]] |
introduced=1969 |
discontinued=1972 |
manuals=
* [http://w140.com/tek_1l40.pdf Tektronix 1L40 Manual (PDF)]
}}
The '''Tektronix 1L40''' is a spectrum analyzer plug-in for [[500-series scopes]].
It covers the frequency range from 1.5 GHz to 40 GHz.
It covers the frequency range from 1.5 GHz to 40 GHz.
The front-end mixer of the 1L40 is a removable module.
The front-end mixer of the 1L40 is a removable module.
By default the 1L40 comes with a coaxial mixer, Tek part number 119-0096-00,  
By default the 1L40 comes with a coaxial mixer,
which works up to 12.4 GHz.
Tek part number 119-0096-00, which works up to 12.4 GHz.
12.4 GHz to 18 GHz requires the 119-0097-00.
The 119-0096-00 contains a [[1N415D]] detector diode.
18 GHz to 26.5 GHz requires the 119-0098-00.
 
26.5 GHz to 40 GHz requires the 119-0099-00.
Type 1L40 was produced for only 3 years, making it the shortest-lived letter-series plug-in.
 
* 12.4 GHz to 18 GHz requires the 119-0097-00.
* 18 GHz to 26.5 GHz requires the 119-0098-00.
* 26.5 GHz to 40 GHz requires the 119-0099-00.
 
Note that the 1L40's display of RF signals is actually back-to-front:
lower frequencies are to the right, and higher to the left.
This is because the 1st LO is above the input signal frequency
yet the display shows the IF sweep from low to high left-to-right,
so the displayed spectrum is inverted.


The 1L40 is also capable of displaying signals in its IF range of 150-250MHz,
because its input is unfiltered so everything passes straight through to the second mixer.
In this case, however, the display is left-to-right.


* [http://w140.com/tek_1l40.pdf Tektronix 1L40 Manual (PDF)]
==Specifications==
[[Category:Specifications needed]]''please add''


==Pictures==
<gallery>
<gallery>
File:Tek 1l40 cat.jpg
Tek 1l40 front.jpg|1L40 Front
Tek 1l40 cat.jpg|Front View from Catalog
Bent tooth gear and screw.jpg|Bent tooth on 1L40 tuning gear provides limit stop in both directions.
Tek 1L40 1.jpg
Tek 1L40 2.jpg
Tek 1L40 3.jpg
Tek 1L40 4.jpg
Tek 1L40 5.jpg
Tek 1L40 6.jpg
Tek 1L40 7.jpg
Tek 1L40 8.jpg
Tek 1L40 9.jpg
Tek 1l40 mixers.png|External Mixers and Adaptor
Tek 119-0097-00 1.jpg|119-0097-00
Tek 119-0097-00 2.jpg|119-0097-00
Tek 119-0098-00 1.jpg|119-0098-00
Tek 119-0098-00 2.jpg|119-0098-00
Tek 119-0099-00 1.jpg|119-0099-00
Tek 119-0099-00 2.jpg|119-0099-00
1L40_front.jpg|Front view
1L40_threequarter.jpg|Threequarter view
1L40_right.jpg|Right side view. Note the housing for the removable input mixer at bottom left, and the tuned cavity for the 1st local oscillator at the top.
1L40_left.jpg|Left side view.
1L40_rear.jpg|Rear view. Note the selector switch to adapt the sweep input voltage to different models in the 500 series range.
1L40_bottom.jpg|Bottom view.
1L40_top.jpg|Top view. Cavity for the 1st local oscillator is on the right, and the tuning mechanism is visible. IF filters and attenuators are in the can in the middle.
1L40_input_closeup.jpg|Input connector. This is the basic 1.5-12.4GHz input, which can be removed and replaced with an extension cable to waveguide mixers for higher frequencies.
1L40_dial_closeup.jpg|Closeup of RF centre frequency dial. Fundamental range is at the bottom with harmonics above.
1L40_dispersion_switch_closeup.jpg|Closeup of part of the dispersion range switch assembly. Note the two little fingers attached to the shaft which operate the toggle switch.
1L40_in_535A_2100MHz.jpg|1L40 in 535A mainframe tuned to 2100MHz cellular band showing signals. 5MHz/div dispersion.
1L40_2100MHz_closeup.jpg|Tuned to 2100MHz cellular band (5MHz/div dispersion) showing 3G data downlinks from various operators. From the right: Orange, T-Mobile, Plus and Play. Photo taken in Warsaw, Poland, January 2018.
1L40_IF.jpg|Signals displayed straight through the plugin's 150-250MHz IF. Dispersion 5MHz/div, centre frequency 200MHz. The peak on the left is the local DAB radio multiplex on channel 6B, 183.648MHz. The hump to the right of that is the local DVB-T multiplex 'Mux 8' on channel 7. Photo taken in Warsaw, Poland, January 2018.
</gallery>
</gallery>
==Video==
[https://drive.google.com/open?id=0B-Q3jyZPb-C1VUx2TUlObmpJdHc&authuser=0 Video of Tuning Limit Stop Mechanism]
[[Category:Spectrum Analyzers]]
[[Category:500 series plugins]]

Revision as of 08:29, 4 February 2018

Template:Plugin Sidebar 2 The Tektronix 1L40 is a spectrum analyzer plug-in for 500-series scopes. It covers the frequency range from 1.5 GHz to 40 GHz.

The front-end mixer of the 1L40 is a removable module. By default the 1L40 comes with a coaxial mixer, Tek part number 119-0096-00, which works up to 12.4 GHz. The 119-0096-00 contains a 1N415D detector diode.

Type 1L40 was produced for only 3 years, making it the shortest-lived letter-series plug-in.

  • 12.4 GHz to 18 GHz requires the 119-0097-00.
  • 18 GHz to 26.5 GHz requires the 119-0098-00.
  • 26.5 GHz to 40 GHz requires the 119-0099-00.

Note that the 1L40's display of RF signals is actually back-to-front: lower frequencies are to the right, and higher to the left. This is because the 1st LO is above the input signal frequency yet the display shows the IF sweep from low to high left-to-right, so the displayed spectrum is inverted.

The 1L40 is also capable of displaying signals in its IF range of 150-250MHz, because its input is unfiltered so everything passes straight through to the second mixer. In this case, however, the display is left-to-right.

Specifications

please add

Pictures

Video

Video of Tuning Limit Stop Mechanism