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-{{Oscilloscope Sidebar |
+{{Instrument Sidebar
-title=Tektronix 2794 |
+|class=Spectrum Analyzer
-summary=Spectrum Analyzer 10 kHz to 21 GHz |
+|manufacturer=Tektronix
-image= Tek 2794 1.jpg |
+|model=2794
-caption=Tektronix 2794 |
+|summary=21 GHz Spectrum Analyzer
-introduced=1993 |
+|image=Tek 2794 1.jpg
-discontinued=1996 |
+|caption=Tektronix 2794
-manuals=
+|introduced=1993
-Need Operator’s and Service Manuals
+|discontinued=1996
-* [[Media:tek_2790_series_programming_manual.pdf| Tektronix 2790 Series Programming Manual (PDF)]]
+|designers=
-*[[Media:Tektronix_279X_Catalog_Datasheet.pdf| Tektronix 279X Datasheet (PDF)]]
+|manuals=
+* Operator's and Service Manuals needed [[Category:Manual needed]]
+* [[Media:070-8643-00.pdf|Tektronix 2790 Series Programming Manual]]
+* [[Media:Tek 2792 schematics.pdf|Tektronix 2792 Schematics]]
+* [[Media:tek_2790_series_programming_manual.pdf|Tektronix 2790 Series Programming Manual]]
+* [[Media:Tektronix_279X_Catalog_Datasheet.pdf|Tektronix 279x Datasheet]]
+{{ROM Images}}
+For Firmware 1.2 or 1.3 see [[ROM_images|ROM images]] for each EPROM that may need updating or refreshing.
 }}
 The '''Tektronix 2794''' is a spectrum analyzer with a frequency range of 10 kHz to 21 GHz in coax, to 325 GHz with external waveguide mixers.  The minimum resolution bandwidth is 10 Hz, and provides measurement resolution proportional to the frequency accuracy or span.   In addition to conventional digital storage features, non-volatile memory (NVRAM) stores up to 9 separate waveforms with their readouts and markers, for later recall for additional analysis and comparison.  Also, store up to 10 different front-panel control setups for future recall.  The instrument can selectively count one particular signal out of several that may be present at its input.
@@ Line 23: / Line 32: @@
 {{BeginSpecs}}
-{{Spec | Frequency Range |
+{{Spec | Frequency |
-* Coaxial Input Bands: 10 kHz to 21 GHz;
+Coaxial Input Bands: 10 kHz to 21 GHz,<br />
-* External Waveguide mixer: 10 kHz to 325 GHz }}
+External Waveguide mixer: 10 kHz to 325 GHz }}
-{{Spec | Frequency Span Range (plus 0 Hz and MAX) | 100 Hz to 150 GHz }}
+{{Spec | Frequency Span  | 100 Hz to 150 GHz (plus 0 Hz and MAX)}}
-{{Spec | Resolution Bandwidth Range | 6 dB bandwidths from 3 Hz to 10 MHz }}
+{{Spec | Resolution Bandwidth | 6 dB bandwidths from 3 Hz to 10 MHz }}
 {{Spec | RF Input impedance | 50 Ω }}
-{{Spec | Maximum Safe Input Power |
+{{Spec | Maximum Safe Input Power | 1 Watt (+30 dBm) CW, 75 W peak, 1 µs, 0.1% duty factor pulse }}
-* CW Power: 1 Watt (+30 dBm);
+{{Spec | External Mixer Input | 50 Ω with VSWR ≤1.3:1 at <2.5 GHz, and ≤3.5:1 at 21 GHz }}
-* Pulse Power: 75 W peak, 1 µS, 0.1% duty factor }}
+{{Spec | RF Attenuator | 0 dB to 60 dB, 10 dB steps }}
-{{Spec | External Mixer Input | 50Ω with VSWR ≤1.3:1 at <2.5 GHz, and ≤3.5:1 at 21 GHz }}
+{{Spec | Reference Level | -117 dBm to +30 dBm }}
-{{Spec | RF Attenuator Range | 0 dB to 60 dB, 10 dB steps }}
-{{Spec | Reference Level Range | -117 dBm to +30 dBm }}
 {{Spec | LO Output Power (2 to 6 GHz) | 1st LO: +7.5 dBm to +20 dBm; 2nd LO: -12 dBm to +5 dBm }}
-{{Spec | Sweep Speed Range | 100 s to 200 µs in 1, 2, 5 sequence }}
+{{Spec | Sweep Speed | 100 s to 200 µs in 1, 2, 5 sequence }}
-{{Spec | Video Bandwidth Range | 0.3 Hz to 30 kHz }}
+{{Spec | Video Bandwidth | 0.3 Hz to 30 kHz }}
 {{Spec | Triggering Modes | Free Run, Line, Video, Single, Ext }}
 {{Spec | Displayed Average Noise | −80 dBm to −134 dBm }}
 {{Spec | Display Dynamic Range | 90 dB }}
-{{Spec | Included Accessories |Operator’s Manual; Programmer’s Manual; 6-ft, 50Ω coaxial cable, N-N; 18-inch, 50Ω coaxial cable, BNC-BNC; N male to BNC female adapter; rear connector shield; power cord and spare fuses; CRT filter set consisting of amber and gray light filters plus mesh filter }}
+{{Spec | Dynamic Range (Compression to noise) | 134 dBm }}
 {{Spec | Weight | 22.2 kg (48 lbs) }}
-{{Spec | Power | 90 − 132 V<sub>AC</sub>, 47 −63 Hz; 180 – 250 V<sub>AC</sub>, 47 to 63 Hz.  At 115 V<sub>AC</sub>, 60 Hz, 210 W max }}
+{{Spec | Power | 90 − 132 V<sub>AC</sub>, 47 to 63 Hz; 180 – 250 V<sub>AC</sub>, 47 to 63 Hz.  At 115 V<sub>AC</sub>, 60 Hz, 210 W max }}
 {{EndSpecs}}
+==Internals==
+The A54 memory board and A70 Z-axis board bear microswitches to select certain options or configure the respective cards for proper operation in the 2794. Switch position 5 on A70S1010 enables the service mode adjustments in the utility (UTIL) menu. For further info see the switch settings in the figure below.
 ==Options==
+* Opt. 07: External Mixer input replaced by low frequency 75 Ω input (dBmV calibrated)
 * Opt. 10: Frequency range extension to 26.5 GHz
 * Opt. 11: Frequency range extension to 40 GHz
@@ Line 60: / Line 71: @@
 ==Pictures==
 <gallery>
-Tek 2794 trace.jpg
+Tek 2794 trace.jpg |2794 front
-Tek 2794 controls.jpg
+Tek 2794 controls.jpg|2794 front
-Tek 2794 1.jpg
+Tek 2794 1.jpg|2794 front
-Tek 2794 3.jpg
+Tek 2794 3.jpg|2794 front
-Tek 2794 4.jpg
+Tek 2794 4.jpg|2794 rear with cover
-Tek 2794 5.jpg
+Tek 2794 5.jpg|2794 front
+_rear.jpg| 2794 rear without cover (note red voltage selector switch barely visible through plastic grill, top left)
+_internal_top.jpg| 2794 internal top
+_internal_bottom.jpg|2794 internal bottom
+_A70_671-2618-00.jpg|A70 Z-axis & RF interface board 0671-2618-00 with S1010 switch and [[Elapsed time meter]]
+-8636-01_page_6-92.png| Switch settings of A54A1050 and A70S1010 for the 2794.
 </gallery>
-[[Category: Spectrum Analyzers]]
+[[Category:Spectrum analyzers]]

2794: Difference between revisions

2794 (view source)

Revision as of 05:41, 1 February 2023

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