| Type | HEMT, cooled |
|---|---|
| Channels | 3 |
| Receiver Noise Temperature | 85 K (Channel A) 100K (Channel B) 135 K (Channel C) |
| Frequency Range | 84 - 96 GHz |
| Bandwidth RF-Filters | no RF Filter |
| Polarization | Horn I: LHC (Channel A) and RHC (Channel B) Horn II: LHC (Channel C) |
| Calibration | Noise diode and pulse cal injection in IF |
| Feed | Primary fokus horns |
| 1. IF | 19.5 - 22.5 GHz |
| 1. Oscillator | Frequency Multiplier ULO1*48 (59 -75 GHz) ULO1 = 1312.5 - 1562.5 MHz |
| 2. IF | 2 - 4 GHz |
| 2. Oscillator | Frequency Multiplier ULO2*32 (18 GHz) ULO2 = 562.5 MHz |
| 3. IF | 0.5 - 1.0 GHz |
| 3. Oscillator | Frequency Multiplier ULO2*4 (2.25 GHz) ULO2 = 562.5 MHz |
|
|
| - to enlarge, click into block diagram - |
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).
| ULO Frequencies: |
fULO1 = (fsky– 21,0 GHz) / 48 fULO2 = 562,5 MHz |
|---|
