Table of contents
Overview
Dual-frequency test observations between PV and APEX in conjunction with the GMVA session C242.
System schematics
Setup 86 GHz
Target band: 86.012 - 87.036
1st LO: 93.012 GHz (confirmed OK)
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 (confirmed OK)
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: MPIH%028/48000
slot 2: MPIH%029/48000
recorder3
slot 1: MPIH%034/48000
slot 2: EHT%0036/48000
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
