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FPT Test Oct 2024

Modified 10:11, 24 Sep 2024 by rottmann | Page History
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Version as of 17:46, 4 Apr 2025

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Overview

Dual-frequency test observations between PV and APEX in conjunction with the GMVA session C242.

System schematics

FPT_TEST_PV.png

Setup 86 GHz

Target band: 86.012 - 87.036

1st LO:     93.012 GHz (confirm that this is possible)

RF:           E90LI (4-9GHz LSB)   

2nd LO (DBBC3): 9.048 GHz

Sky freq:    83.964 - 88.060 GHz

 

sky 83964 84988 86012 87036
after 1st DC 9048 8024 7000 5976
after 2nd DC 0 1024 2048 3072

=> DBBC3 should use filter1= 2000-3000

Setup 260 GHz

Target band: 258.036 - 259.060

1st LO:     267.084 GHz (confirm that this is possible)

RF: ?? (assuming LSB 4-9 GHz)

2nd LO (DBBC3): 9048 GHz

Sky freq:    258.036 - 262132 GHz
 

sky 258036 259060 260084 261108
after 1st DC 9048 8024 7000 5976
after 2nd DC 0 1024 2048 3072

=> DBBC3 should use filter1 = 0-1000

DBBC3 setup

  • load normally the OCT_120 firmware
  • run:
/home/oper/rottmann/dbbc3/utilities/dbbc3ctl.py dbbc3
and do 
check system all
  • run /home/oper/rottmann/dbbc3/utilities/setupFPT_Oct24.py dbbc3  (sets the 1GHz filters and the LO freqs)

Modules & Recorders

recorder2

slot 1: ??

slot 2: ??

recorder3

slot 1: ??

slot 2: ??

 

module setup (do on both recorders)

group=new:12
input_stream=add:stream1:vdif:8224:50:42:eth3:::1
input_stream=add:stream2:vdif:8224:50:42:eth5:::2
input_stream=commit
group=open:12

Action

  •