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3L5: Difference between revisions
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|series=560-series scopes | |series=560-series scopes | ||
|type=3L5 | |type=3L5 | ||
|summary=1 MHz Spectrum Analyzer | |summary=50 Hz - 1 MHz Spectrum Analyzer Plug-In | ||
|image=Tek 3L5 front2.jpeg | |image=Tek 3L5 front2.jpeg | ||
|caption=Tektronix 3L5 Spectrum Analyzer | |caption=Tektronix 3L5 Spectrum Analyzer | ||
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* [[Media:Tek 3l5 fcp aug 1967.pdf|Tektronix 3L5 Factory Calibration Procedure, August 1967]] | * [[Media:Tek 3l5 fcp aug 1967.pdf|Tektronix 3L5 Factory Calibration Procedure, August 1967]] | ||
}} | }} | ||
The '''Tektronix 3L5''' is a 50 Hz | The '''Tektronix 3L5''' is a 50 Hz − 1 MHz spectrum analyzer plug-in for [[560-series scopes]]. It is very similar to the [[1L5]]. | ||
In conjunction with the [[015-0107-00]] Swept Frequency Converter (tracking generator), the 3L5 can also be used to make scalar frequency response measurements. | In conjunction with the [[015-0107-00]] Swept Frequency Converter (tracking generator), the 3L5 can also be used to make scalar frequency response measurements. | ||
{{BeginSpecs}} | |||
{{Spec | Center Frequency | 50 Hz to 990 kHz }} | |||
{{Spec | Dispersion | 10 Hz to 100 kHz }} | |||
{{Spec | Input Impedance | 1 MΩ // 30 pF }} | |||
{{Spec | Input Voltage | Max. 300 V (DC + peak AC) }} | |||
{{Spec | Vertical Resolution | Video: 100 mV/div to 100 V/div, LIN: 1 mV to 2 V<sub>RMS</sub> }} | |||
{{Spec | Internal Cal Signal | 5 kHz ±1% }} | |||
{{Spec | First LO Out | ≥1 MHz (Sweep), ≥1 V<sub>p-p</sub> into ≥1 kΩ }} | |||
{{Spec | Recorder Out | 5 mV to 15 mV into 600 Ω }} | |||
{{Spec | Weight | 2.7 kg / 6 lbs }} | |||
{{EndSpecs}} | |||
A video filter switch was added to the later SNs (1971 Catalog). | A video filter switch was added to the later SNs (1971 Catalog). | ||
The 3L5 | |||
==Internals== | |||
The 3L5 is a full semiconductor design except for the final output amplifier, which uses a [[8416]] vacuum tube. The circuit is based on the swept-frontend design, i.e. the first local oscillator is swept for the spectrum scan. | |||
=== 75 Ω Version === | === 75 Ω Version === | ||
There is also a 75 Ω version of the 3L5. Its input is on the rear, via a coaxial connector. | There is also a 75 Ω version of the 3L5. Its input is on the rear, via a coaxial connector. | ||
A lever on the front panel switches between two frequency ranges: | A lever on the front panel switches between two frequency ranges: | ||
* 10 kHz | * 10 kHz − 1 MHz | ||
* 18.010 MHz | * 18.010 MHz − 19 MHz | ||
===Timebase Support=== | ===Timebase Support=== | ||
3L5 requires a timebase plug-in in the horizontal compartment to operate. | The 3L5 requires a timebase plug-in in the horizontal compartment to operate. | ||
Timebase plug-in units with serial numbers listed below require modification [[040-0413-00]] to provide the sweep signal to the 3L5 (To pin 18 of the [[560_Series_plug-in_interface|plug-in connector]]). | Timebase plug-in units with serial numbers listed below require modification [[040-0413-00]] to provide the sweep signal to the 3L5 (To pin 18 of the [[560_Series_plug-in_interface|plug-in connector]]). | ||
| Line 44: | Line 57: | ||
| [[3B4]] || <740 | | [[3B4]] || <740 | ||
|} | |} | ||
==Pictures== | ==Pictures== | ||
'''1 MΩ version''' | '''1 MΩ version''' | ||
<gallery> | <gallery> | ||
Tek 3L5 front2.jpeg | Tek 3L5 front2.jpeg | Front | ||
Tek 3L5 left2.jpeg | Tek 3L5 left2.jpeg | Left | ||
Tek 3L5 right2.jpeg | Tek 3L5 right2.jpeg | Right | ||
Image:Tek 3l5 front.jpg | 1 MΩ Version | Image:Tek 3l5 front.jpg | 1 MΩ Version | ||
Tek_3L5_LateSN.jpeg | 1 MΩ | Tek_3L5_LateSN.jpeg | 1 MΩ Later Version with Video Filter Switch | ||
3L5_LHS.jpeg | LHS | 3L5_LHS.jpeg | LHS | ||
3L5_RHS.jpeg | RHS | 3L5_RHS.jpeg | RHS | ||
3L5_Top.jpeg | Top | 3L5_Top.jpeg | Top | ||
3L5_Bottom.jpeg | Bottom | 3L5_Bottom.jpeg | Bottom | ||
3L5_Filter-Chassis_1.jpeg|Internals - 3 MHz Filter, 2nd LO (3.1 MHz) and 2nd | 3L5_Filter-Chassis_1.jpeg|Internals - 3 MHz Filter, 2nd LO (3.1 MHz) and 2nd Mixer. | ||
3L5_Filter-Chassis_2.jpeg|Internals - | 3L5_Filter-Chassis_2.jpeg|Internals - 3 MHz Filter, 2nd LO (3.1 MHz) and 2nd Mixer. | ||
158-0022-00_1.jpeg | Internals - 100 kHz | 158-0022-00_1.jpeg | Internals - 100 kHz Crystal from Variable Resolution Amp [[158-0022-00]] | ||
158-0022-00_2.jpeg | Internals - 100 kHz crystal from | 158-0022-00_2.jpeg | Internals - 100 kHz crystal from Variable Resolution Amp [[158-0022-00]] | ||
</gallery> | </gallery> | ||
'''75 Ω version''' | '''75 Ω version''' | ||
<gallery> | <gallery> | ||
3l5 18mhz fr2.JPG|75 Ω | 3l5 18mhz fr2.JPG | 75 Ω Version of 3L5, Front | ||
Tek 3l5 75ohm 1.jpg|75 Ω | Tek 3l5 75ohm 1.jpg | 75 Ω Version, Front/Top | ||
Tek 3l5 75ohm 4.jpg|75 Ω | Tek 3l5 75ohm 4.jpg | 75 Ω Version, Left | ||
Tek 3l5 75ohm 5.jpg|75 Ω | Tek 3l5 75ohm 5.jpg | 75 Ω Version, Top | ||
Tek 3l5 75ohm 6.jpg|75 Ω | Tek 3l5 75ohm 6.jpg | 75 Ω Version, Bottom/Left | ||
3l5 18mhz l.JPG|75 Ω | 3l5 18mhz l.JPG | 75 Ω Version | ||
3l5 18mhz l2.JPG|75 Ω | 3l5 18mhz l2.JPG | 75 Ω Version | ||
3l5 18mhz rr2.JPG|75 Ω | 3l5 18mhz rr2.JPG | 75 Ω Version, Back | ||
</gallery> | </gallery> | ||