===Technical Documentation of the 18/21 cm Receiver 1.3 - 1.7 GHz (P200mm)===

||Type|HEMT cooled| 
||Channels|2 |
||Receiver Noise Temprature | 10 K |
||Feed |  Prime Focus Horn |
||Frequency Range |  1.2 - 1.8 GHz |
|Bandwidth available |Narrow Band on Coax IF |Broad Band on Optical IF|
|Bandwidth RF-Filters |1290 - 1430 MHz and 1580 - 1725 MHz |1.2 - 1.8 GHz and 1.5 - 1.8 GHz|
|Calibration|Noise diode |Noise diode|
|Polarization|LHC and RHC|LHC and RHC|
|Phaseshifter|in LO-system|no |
|1.IF|80 - 220 MHz|No down conversion|
|Local Oscillator|ULO1 or LO 1.2 - 1.8 GHz| No|
=== Block Diagram ===

{{:electronics:rx:techinfo:p200mm.jpg|}}

>Simplified Block Diagram of {{:electronics:rx:techinfo:p200mm_receiver.pdf|}} the complete receiver, (ZMK on 03.06.2019) 
=== Comments ===
The 1.2-1.8 GHz system is a prime focus receiver with cooled HEMT amplifiers. The system is built to observe circular polarization, the transducer comprises a cooled linear transducer (design NRAO) followed by a cooled hybrid.This system is part of Primary Focus Multi Frequency Box #1 (PM 1).