===Technical Documentation of the 1cm Receiver 27 - 38 GHz (P10mm)===
|Type|HEMT cooled|
|Channel|1|
|Receiver Noise Temperature|10-40 K|
|Bandwidth RF-Filters|See below filter combination|
|Polarization|Linear|
|Calibration|Noise Diode|
|Feed|	Primary Focus Horn|

|Frequency Range|26.5 - 38.7 GHz|
|1.IF|2 - 4 GHz (Broadband)|
|1.Synthesizer|Holzworth HSM12001|Frequency 9.75 - 11.95 GHz|
|//Filter Band//|//Frequency Band//|//Frequency Synthesizer and LO1//|//Side Band//|
|Band 1| 26.4 - 29.1 GHz |F = 3*(9.75 - 10.7 GHz) = 29.25 - 32.1 GHz| LSB|
|Band 2| 28.5 - 33.7 GHz |F = 3*(10.5 - 11.9 GHz) = 31.50 - 35.7 GHz| LSB|
|Band 3| 32.3 - 38.7 GHz |F = 3*(9.77 - 11.9 GHz) = 29.31 - 35.7 GHz| USB|
|2.IF|500 - 1000 MHz|
|2.Local Oscillator|fixed Phase Locked Oscillator|LO2=3.75 GHz|
=== Block Diagram ===
{{:electronics:rx:techinfo:bsb_1cm_pm1.jpg?1100|}}

>Simplified Block Diagram of {{:electronics:rx:techinfo:p10mm_receiver_withholzworth.pdf|}}, (ZMK on 26.03.2021) 

===Receiver Noise Temperature===
{{:electronics:rx:techinfo:diagramme_eigenrauschen_1cm_rx_seite_1.jpg|}}
{{:electronics:rx:techinfo:diagramme_eigenrauschen_1cm_rx_seite_2.jpg|}}
{{:electronics:rx:techinfo:diagramme_eigenrauschen_1cm_rx_seite_3.jpg|}}
=== Comments ===
This  system  is  equipped  with  3  RF-Filters  to  suppress  mirror  frequency  reception.  During  observation,  the  filter  and  ULO  settings  have  to  be  selected according to the observation frequency (see block diagram).In March 2007 the LNA was replaced by an InP-HEMT MMIC-amplifier designed for the 9mm receiver. Therefore the noise figure at low frequencies is not ideal.This system is part of the Primary Focus Multi Frequency Box #1 (PM 1).