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discontinued=1972 | | discontinued=1972 | | ||
manuals= | manuals= | ||
* [http://w140.com/tek_1l40.pdf Tektronix 1L40 Manual (PDF, bad-scan)] | |||
* [ | * [[Media:070-0904-00.pdf|Tektronix 1L40 Manual (PDF, OCR, bad-OCR)]] | ||
* [[Media:Tek 1l40 fcp march 1969.pdf|Tektronix 1L40 Factory Calibration Procedure, March 1969]] | |||
}} | }} | ||
The '''Tektronix 1L40''' is a spectrum analyzer plug-in for [[500-series scopes]]. | 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. | ||
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. | ||
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. | * 12.4 GHz to 18 GHz requires the 119-0097-00. | ||
* 18 GHz to 26.5 GHz requires the 119-0098-00. | * 18 GHz to 26.5 GHz requires the 119-0098-00. | ||
* 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 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== | ==Specifications== | ||
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==Pictures== | ==Pictures== | ||
<gallery> | <gallery> | ||
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> | ||
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[https://drive.google.com/open?id=0B-Q3jyZPb-C1VUx2TUlObmpJdHc&authuser=0 Video of Tuning Limit Stop Mechanism] | [https://drive.google.com/open?id=0B-Q3jyZPb-C1VUx2TUlObmpJdHc&authuser=0 Video of Tuning Limit Stop Mechanism] | ||
[[Category:Spectrum | [[Category:Spectrum analyzers]] | ||
[[Category:500 series plugins]] | [[Category:500 series plugins]] |