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{{Oscilloscope Sidebar |
{{Instrument Sidebar  
title=Tektronix 1705A |
|manufacturer=Tektronix
summary=Spectrum Monitor 45 MHz to 100 MHz, and 950 MHz to 1.8 GHz |
|model=1705A  
image= Tek_1705a_front.jpg |
|class=Spectrum Analyzer
caption=Tektronix 1705A |
|summary=Spectrum Monitor
introduced=1988 |
|image= Tek_1705a_front.jpg  
discontinued=2000+ |
|caption=Tektronix 1705A  
manuals=
|introduced=1988  
Need Service Manual
|discontinued=2000+  
|manuals=
* [[Media:070-8222-08.pdf| Tektronix 1705A Instruction Manual (PDF)]]
* [[Media:070-8222-08.pdf| Tektronix 1705A Instruction Manual (PDF)]]
* [[Media:Tek_1705_Catalog_1988.pdf| Tektronix 1705 Introduction Spec (PDF, OCR)]]
* [[Media:Tek_1705_Catalog_1988.pdf| Tektronix 1705 Introduction Spec (PDF, OCR)]]
* [[Media:Tek_1705A_Catalog_1993.pdf| Tektronix 1705A Introduction Spec (PDF, OCR)]]
* [[Media:Tek_1705A_Catalog_1993.pdf| Tektronix 1705A Introduction Spec (PDF, OCR)]]
* ''Service Manual needed''  [[Category:Manual needed]]
}}
}}
The '''Tektronix 1705A''' is a spectrum monitor designed primarily for locating Ku or C-Band satellites and monitoring their signals with a 3 X 4 in. (80 X 100 mm) monochrome CRT display.  It operates by using LNB down converters to the L-Band (950 MHz to 1.8 GHz), and monitoring up link transmissions utilizing an Upconverter to the 70 MHz IF (45 MHz to 100 MHz).  The resolution bandwidths 10 kHz and 300 kHz provides measurement resolution proportional to the frequency accuracy or span.
The '''Tektronix 1705A''' is a spectrum monitor designed primarily for locating Ku or C-Band satellites and monitoring their signals with a 3 X 4 in. (80 X 100 mm) monochrome CRT display.  It operates by using LNB down converters to the L-Band (950 MHz to 1.8 GHz), and monitoring up link transmissions utilizing an Upconverter to the 70 MHz IF (45 MHz to 100 MHz).  The resolution bandwidths 10 kHz and 300 kHz provides measurement resolution proportional to the frequency accuracy or span.


The CRT has a graticule that can be lit up or not depending on the internal jumper position.  With non-volatile memory (NVRAM) you can save the current front-panel switch settings, at power down, so that the 1705A can come back with the last front-panel setup.  The user interface has on-screen frequency readout, as well as, setup menus.  The L-Band readout may be reconfigured to display a satellite frequency in the range of 0.9 GHz to 20 GHz.
The CRT has a graticule that can be lit up or not depending on the internal jumper position.  With non-volatile memory (NVRAM) the current front-panel switch settings can be saved, at power down, so that the 1705A can come back with the last front-panel setup.  The user interface has on-screen frequency readout, as well as, setup menus.  The L-Band readout may be reconfigured to display a satellite frequency in the range of 0.9 GHz to 20 GHz.


Rear panel inputs/outputs are: L-BAND INPUT [[F-Type connector]] (Female connector used for the 900 – 2000 MHz input of the L-Band rf, which is down converted by a Low-Noise Amplifier/Block Down Converted (LNB) from the received satellite signal; The LNB POWER switch enables or disables an 18 V supply for the Block Down Converted through the L-BAND INPUT connector); 70 MHz INPUT [[BNC connector]] (Female connector used for the input of the 45MHz – 100 MHz rf).
Rear panel inputs/outputs are: L-BAND INPUT [[F connector]] (Female connector used for the 900 – 2000 MHz input of the L-Band rf, which is down converted by a Low-Noise Amplifier/Block Down Converted (LNB) from the received satellite signal; The LNB POWER switch enables or disables an 18 V supply for the Block Down Converted through the L-BAND INPUT connector); 70 MHz INPUT [[BNC connector]] (Female connector used for the input of the 45MHz – 100 MHz rf).


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{{Spec | RF Attenuator Range | No built-in internal attenuation.  Apply an external attenuator to keep the maximum safe input power below the rating listed above }}
{{Spec | RF Attenuator Range | No built-in internal attenuation.  Apply an external attenuator to keep the maximum safe input power below the rating listed above }}
{{Spec | Sweep Speed Range | 20 ms to 200ms, variable }}
{{Spec | Sweep Speed Range | 20 ms to 200ms, variable }}
{{Spec | Displayed Frequencies in FULL Span/Div |
* L-Band: Left Grat. Edge = 900 MHz; Mid Grat. Line = 100 MHz; Right Grat. Edge = 1900 MHz;
* 70 MHz: Left Grat. Edge = 45 MHz; Mid Grat. Line = 70 MHz; Right Grat. Edge = 95 MHz }}
{{Spec | Included Accessories | Instruction Manual; F-type Male Connector to BNC Female Connector Adapter; and Power Cord }}
{{Spec | Included Accessories | Instruction Manual; F-type Male Connector to BNC Female Connector Adapter; and Power Cord }}
{{Spec | Weight | Standard accessories: 3.8 kg (8.5 lbs) }}
{{Spec | Weight | Standard accessories: 3.8 kg (8.5 lbs) }}
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</gallery>
</gallery>


[[Category: Spectrum Analyzers]]
[[Category:Spectrum analyzers]]
Retrieved from "https://w140.com/tekwiki/wiki/Special:MobileDiff/49002...68764"

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