===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|||
|1. IF Frequency|19.5 - 22.5 GHz|||
|1. Synthesizer|Holzworth HSM12001|Frequency = 7875.0 - 9375.0 MHz (f0 = 8156.25 MHz)||
|Local Oscillator 1|->|LO1=8*(7875.0 - 9375.0) MHz = 63-75 GHZ ||
|2. IF Frequency|2-4GHz|||
|2. Synthesizer|Valon 5009, Synth. 1|f0=6000 MHz||
|Local Oscillators|->|LO2=3*6000 MHz = 18 GHz||
|3.IF Frequency|0.5-1.0 GHz|||
|3. Synthesizer|Valon 5009, Synth. 2|f0=2250 MHz||
|Local Oscillators|->|LO3=2250 MHz||

=== Block Diagram ===
{{ :electronics:rx:techinfo:bsb_hsm_valon_p3mm_pm1.jpg?600 |}}

ULO Frequencies:
>fLO1 = (fsky– 21,0 GHz) / 16
>fLO2 = 2250MHz

>Simplified Block Diagram of   the complete receiver,{{ :electronics:rx:techinfo:3mm_receiver_hsm_valon.pdf |}} (RK on 21.09.2021)

> Simplified Block Diagram {{ :electronics:rx:techinfo:3mm_blockdiagramm_2021.pdf |(alternative design)}} (RK on 21.09.2021)

>Local Frequency Generation for 3mm Receiver using Holzworth HSM12001B Synthesizer 

{{:electronics:rx:techinfo:holzworth_as_lo.pdf|}}

>Local Frequency Generation for 3mm Receiver using a Valon 5009 Dual Frequency 


>Synthesizer{{:electronics:rx:techinfo:protocol_of_new_oul1_generation_for_3mm_receiver.pdf|}}

>Valon5009 synthesizer’s Frequency Response Consideration {{:electronics:rx:techinfo:valon5009_frequency_response.pdf|}}

=== Charts===


{{:electronics:rx:techinfo:3mm_recnoisetemp.gif|}}

{{:electronics:rx:techinfo:3mm_recnoisetemp.gif|}}



=== 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).