Block Diagram
| Type | HEMT uncooled |
|---|---|
| Channels | 2 |
| Tsys | ≈ 300 K (Trec ≈ 150 K) |
| Frequency Range | 300 - 900 MHz |
| Bandwidth RF-Filters | 300 - 505 MHz 608 - 685 MHz 790 - 915 MHz |
| Polarization | LHC and RHC |
| Calibration | Noise Diode |
| Feed | 11-Feed from DRAO |
| Output | 300 - 900 MHz |
This receiver is a straight forward 300 MHz to 900 MHz receiver with no down
conversion. Due to intensive RFI in this broad frequency band three filter bands
are installed to prevent the system from sturation by the strongest interferer.
Nevertheless there is much more RFI in the band that has to be filtered in the
backend. For a dedicated project a switchable RF filter plus LNA has been inserted.
The filter has a bandwidth of 7 MHz and its frequency is fixed from 399 to 406 MHz.
For continuum measurements an analogue filtering down converter
module to an IF of 100 MHz to 180 MHz for both channels is available:
IF Downconverter Data
| Channels | 2 |
|---|---|
| Frequency Range | 300 - 900 MHz |
| 1. IF | 2100 - 2200 MHz |
| 1. LO | ULO1 = 1250-1850 MHz |
| 2. IF | 100 - 180 MHz |
| 2. LO | ULO2 = 1000 MHz x 2 |