3 mm (84 - 96 GHz, Primary Focus) Receiver

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Receiver Data

TypeHEMT, cooled
Channels3
Receiver Noise Temperature85 K (Channel A)
100K (Channel B)
135 K (Channel C)
Frequency Range84 - 96 GHz
Bandwidth RF-Filtersno RF Filter
PolarizationHorn I: LHC (Channel A) and RHC (Channel B)
Horn II: LHC (Channel C)
CalibrationNoise diode and pulse cal injection in IF
Feed Primary fokus horns
1. IF19.5 - 22.5 GHz
1. OscillatorFrequency Multiplier ULO1*48 (59 -75 GHz)
ULO1 = 1312.5 - 1562.5 MHz
2. IF2 - 4 GHz
2. OscillatorFrequency Multiplier ULO2*32 (18 GHz)
ULO2 = 562.5 MHz
3. IF0.5 - 1.0 GHz
3. OscillatorFrequency Multiplier ULO2*4 (2.25 GHz)
ULO2 = 562.5 MHz


Block Diagram

- to enlarge, click into block diagram -


Comments

This is a tunable single sideaband superheterodyne system fo line and total power observations. For frequency dependent receiver and calibration temperatures see diagramm below.
The Receiver provides two horns for beam switching. The geometric distance of the horns is d = 9,7 mm, the beam seperation at sky is 55 Arcsec.

This system is part of the Primary Focus Multi Frequency Box #2 (PM 2).


Charts

ULO Frequencies: fULO1 = (fsky– 21,0 GHz) / 48
fULO2 = 562,5 MHz