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Through
our Company Headquarters in Riga, Latvia, we have won
European Tender for supplying six microwave dowmconverters
for Diagnostics KK3 (ECE Radiometer) of EFDA-JET. JET,
the Joint European Torus, is the flagship of the European
Community Fusion Program. Knowledge gained from JET
provides valuable input into the design of "next
step" devices such as ITER. The success of the
JET program is seen as an important step forward in
developing commercial fusion power.
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The JET Facility operates a multi-channel heterodyne radiometer
for measuring the evolution of the electron temperature profile
of the JET plasma. This instrument operates over RF range
70-140GHz, which is divided into six RF bands. The signal
in each RF band is downconverted to 6-18Ghz IF band by means
of a mixer and microwave source acting as a local oscillator.
Six ELVA's local oscillators have center frequencies of 63.0,
73.50, 84.90, 97.20, 109.35, 121.40 GHz, that covers required
69.00 - 139.40GHz range. These downconverters will play a
key role in diagnostics upgrade of JET. For more info on JET
please visit http://www.jet.efda.org.
For
more information on downconverters, please download
Instructional Manual that includes schemes, illustrations
and diagrams (Zipped Word, 87K).
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Downconverter
Specifications
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Passband
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Bands
to be suppressed
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System
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WG
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Local
Oscillator
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1st harmonic
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1st harmonic
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2nd
harmonic
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3/2
harmonic
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size
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Centre
frequency
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Upper
sideband
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Lower
sideband
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Lower
sideband
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Lower
sideband
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Lower
sideband
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Upper
sideband
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#
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[GHz](a)
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[GHz]
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[GHz]
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[GHz]
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[GHz]
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[GHz]
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[GHz]
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1
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WR-12
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63,00
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69,00
- 81,00
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45,00
- 57,00
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108,00
- 120,00
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132,00
- 144,00
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76,50
- 88,50
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100,50
- 112,50
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2
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WR-12
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73,50
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79,50
- 91,50
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55,50
- 67,50
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129,00
- 141,00
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153,00
- 165,00
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92,25
- 104,25
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116,25
- 128,25
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3
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WR-8
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84,90
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90,90
- 102,90
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66,90
- 78,90
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151,80
- 163,80
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175,80
- 187,80
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109,35
- 121,35
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133,35
- 145,35
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4
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WR-8
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97,20
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103,20
- 115,20
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79,20
- 91,20
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176,40
- 188,40
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200,40
- 212,40
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127,80
- 139,80
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151,80
- 163,80
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5
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WR-8
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109,35
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115,35
- 127,35
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91,35
- 103,35<
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200,70
- 212,70
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224,70
- 236,70
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146,03
- 158,03
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170,03
- 182,03
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6
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WR-8
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121,40
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127,40
- 139,40
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103,40
- 115,40
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224,80
- 236,80
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248,80
- 260,80
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164,10
- 176,10
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188,10
- 200,10
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A
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B
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C
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D
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E
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F
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G
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H
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I
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