- Information for Astronomers
- General Topics*
- Gruppen Seiten*
* Log-in required
User Tools
Sidebar
electronics:rx:techinfo:documentation_p3mm
This is an old revision of the document!
Table of Contents
Technical Documentation of the 3mm Receiver 84 - 96 GHz (P3mm)
| Type | HEMT cooled | ||
| Channels | 3 | ||
| Receiver Noise Temperature | Channel A | Channel B | Channel C |
| → | 85K | 100K | 135K |
| Bandwidth RF-Filters | No RF Filter | No RF Filter | No RF Filter |
| Polarization | Horn I | Horn I | Horn II |
| → | LHC (Channel A) | RHC (Channel B) | LHC (Channel C) |
| Calibration | Noise diode and pulse cal injection in IF | ||
| Feed | Primary fokus horns | ||
| RF Frequency Range | 84-96 GHz | ||
| Synthesizers | Holzworth HSM12001 | Frequency = 7875.0 - 9375.0 MHz (f0 = 8156.25 MHz) | |
| Local Oscillators | → | LO1=8*(7875.0 - 9375.0) MHz = 63-75 GHZ | |
| 1.IF Frequency | 19.5 - 22.5 GHz | ||
| Synthesizers | Valon 5009, Synth. 1 | LO2=4500 MHz | |
| Local Oscillators | → | 4*LO2=4*4500MHz=18GHz | |
| 2.IF Frequency | 2-4GHz | ||
| Synthesizers | Valon 5009, Synth. 2 | LO3=2250 MHz | |
| Local Oscillators | → | LO2=2250MHz | |
| 3.IF Frequency | 0.5-1.0GHz | ||
Block Diagram
ULO Frequencies:
fLO1 = (fsky– 21,0 GHz) / 16
fLO2 = 2250MHz
Simplified Block Diagram of 3mm_receiver_modified.pdf the complete receiver, (ZMK on 16.08.2019)
Simplified Block Diagram of3mm_block_diagram_second_version.pdf (RK on 15.08.2019)
Local Frequency Generation for 3mm Receiver using a Valon 5009 Dual Frequency
Valon5009 synthesizer’s Frequency Response Consideration valon5009_frequency_response.pdf
Charts
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 #1 (PM 1).
electronics/rx/techinfo/documentation_p3mm.1616421393.txt.gz · Last modified: 2021/03/22 14:56 by rkeller
Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Noncommercial-Share Alike 4.0 International
