1L40: Difference between revisions

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discontinued=1972 |
discontinued=1972 |
manuals=
manuals=
* [http://w140.com/tek_1l40.pdf Tektronix 1L40 Manual (PDF)]
* [http://w140.com/tek_1l40.pdf Tektronix 1L40 Manual (PDF)]
}}
}}
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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. By default the 1L40 comes with  
The front-end mixer of the 1L40 is a removable module.
a coaxial mixer, Tek part number 119-0096-00, which works up to 12.4 GHz.
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.
The 119-0096-00 contains a [[1N415D]] detector diode.


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* 26.5 GHz to 40 GHz requires the 119-0099-00.
* 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
Note that the 1L40's display of RF signals is actually back-to-front:
right, and higher to the left. This is because the 1st LO is above the input signal frequency
lower frequencies are to the right, and higher to the left.
yet the display shows the IF sweep from low to high left-to-right, so the displayed
This is because the 1st LO is above the input signal frequency
spectrum is inverted.
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
The 1L40 is also capable of displaying signals in its IF range of 150-250MHz,
is unfiltered so everything passes straight through to the second mixer. In this case, however,
because its input is unfiltered so everything passes straight through to the second mixer.
the display is left-to-right.
In this case, however, the display is left-to-right.


==Specifications==
==Specifications==
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1L40_in_535A_2100MHz.jpg|1L40 in 535A mainframe tuned to 2100MHz cellular band showing signals. 5MHz/div dispersion.
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_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 looks like a DVB-T multiplex on channel 7, but I can't identify it. 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>



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