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Version from 13:56, 11 Feb 2020
TJAN24 Correlation Report
General information
- Fringe test between PV and NOEMA at 3mm
- Done with the EHT setup 4x2GHz dual-pol
- Pico with 2-of-4 x R2DBE and 1 x DBBC3; on sky demonstration of DBBC3 GMVA fringes
Fringes
| Baseline | Band | Fringes | Plots | Comments |
|---|---|---|---|---|
| Na -Pv | band1 | OK | No0030_b1.pdf ..._32x64M.pdf | Na:r2dbe1 x Pv:dbbc |
| Na -Pv | band2 | OK | No0030_b2.pdf ..._32x64.pdf | Na:r2dbe2 x Pv:dbbc |
| Na -Pv | band3 | OK | No0030_b3.pdf ..._32x64M.pdf | Na:r2dbe3 x Pv:r2dbe2 |
| Na -Pv | band4 | OK | No0030_b4.pdf ..._32x64M.pdf | Na:r2dbe4 x Pv:r2dbe1 |
A-list files
Entire 3-scan tjan24 correlated with 2 x 512 MHz zoombands: alist for b1 b2 b3 b4
Entire 3-scan tjan24 correlated with 32 x 64 MHz zoombands: alist for b1 b2 b3 b4
Notes
- Email Bremer (28.1.2020) :
...Wenn ich Olivier richtig verstanden habe, sollte die Richtung der R2DBE Spektren im LSB invers zu der Himmelsfrequenz laufen (da gab es mal ein Mißverständnis), im USB mit der Himmelsfrequenz, und wir sollten Signal auf 100-1700 MHz haben in dem 0-2048 MHz Band. LO1 Frequenz war 92.101000 GHz, wir sind also 1 MHz verschoben relativ zu Pico. Unser 1PPS Signal sollte einen mittleren Null Offset relativ zu GPS haben, ich hoffe, die Zero Crossings werden Euch nicht stören. Drift sollte sehr klein sein, unser Fit gab zero Drift. VLBI antenna war A9, auf Pad Position E03 4523999.442, 468067.530, 4460310.069 (nach Dave Graham's Skript). Wir waren für alle 3 Scans auf der 5 MHz Referenz der Masers, genau wie für die 1.3 mm Daten. Die Quellen wurden lokal sehr gut detektiert.
- Email Bremer (5.2.2020) :
LSB: B1:Fsky=LO1-7000-IF_R2DBE, B2:Fsky=LO1-5000-IF_R2DBE B1: in the R2DBE [0, 2048] MHz => on the sky [85101, 83053] MHz B2: in the R2DBE [0, 2048] MHz => on the sky [87101, 85053] MHz USB: B3:Fsky=LO1+5000+IF_R2DBE, B4:Fsky=LO1+7000+IF_R2DBE B3: in the R2DBE [0, 2048] MHz => on the sky [97101, 99149] MHz B4: in the R2DBE [0, 2048] MHz => on the sky [99101, 101149] MHz
- Gino Tuccari (5.2.2020) :
The 0-2G|2-4G FIRs do not flip the baseband orientation. The baseband orientation depends on the 4-12G IF, Valon LO tuning, analog filtering. --tjan24: in practice, oct2-4 is flipped by FIR/shift, oct0-2 is not flipped! Also seen at Pico with spectral line.
Basebands
- NOEMA signal chain
| Band | backend | recorder | sky | netSB | |
|---|---|---|---|---|---|
| b1: LSB hi | r2dbe1 | recorder1 (Mark6-4129); collected | 83053 - 85101 | lsb | |
| b2: LSB_lo | r2dbe2 | recorder2 (Mark6-4124); collected | 85053 - 87101 | lsb | |
| b3: USB_lo | r2dbe3 | recorder3 (Mark6-4130); collected | 97101 - 99149 | usb | |
| b4: USB_hi | r2dbe4 | recorder4 (Mark6-4131); collected | 99101 - 101149 | usb |
- Pico calculations
1st LO 92100 B3,B4 : 1st USB : bdc1 5-7|7-9 at 99100M mid : 5-7:97052..99100 | 7-9:99100..101148 B1,B2 : 1st LSB : LO 9.048G lsb : net usb start at 83052M : oct0-2:83052-85100 | 2-4:85100-87148
- PV signal chain
| Band | backend | recorder | sky | netSB | |
|---|---|---|---|---|---|
| b1: LSB hi | DBBC3 | recorder4; collected | 83052 - 85100 | usb | |
| b2: LSB_lo | DBBC3 | recorder3, as-is | 85100 - 87148 | lsb | |
| b3: USB_lo | r2dbe2 | recorder2; collected | 97052 - 99100 | lsb | |
| b4: USB_hi | r2dbe1 | recorder1; collected | 99100 - 101148 | usb |
Issues
- Data weights for PV-RR are reduced. On the 4-module set containing "hand-carry" copies of the other 4-set modules, copied modules have 6 out of the 16 fragment files per scan missing. Apparantly the copy procedure was incomplete. Affects bands 1, 3, and 4.
Version as of 12:15, 12 Feb 2020
TJAN24 Correlation Report
General information
- Fringe test between PV and NOEMA at 3mm
- Done with the EHT setup 4x2GHz dual-pol
- Pico with 2-of-4 x R2DBE and 1 x DBBC3; on sky demonstration of DBBC3 GMVA fringes
Fringes
| Baseline | Band | Fringes | Plots | Comments |
|---|---|---|---|---|
| Na -Pv | band1 | OK | No0030_b1.pdf ..._32x64M.pdf | Na:r2dbe1 x Pv:dbbc |
| Na -Pv | band2 | OK | No0030_b2.pdf ..._32x64.pdf | Na:r2dbe2 x Pv:dbbc |
| Na -Pv | band3 | OK | No0030_b3.pdf ..._32x64M.pdf | Na:r2dbe3 x Pv:r2dbe2 |
| Na -Pv | band4 | OK | No0030_b4.pdf ..._32x64M.pdf | Na:r2dbe4 x Pv:r2dbe1 |
A-list files
Entire 3-scan tjan24 correlated with 2 x 512 MHz zoombands: alist for b1 b2 b3 b4
Entire 3-scan tjan24 correlated with 32 x 64 MHz zoombands: alist for b1 b2 b3 b4
Notes
- Email Bremer (28.1.2020) :
...Wenn ich Olivier richtig verstanden habe, sollte die Richtung der R2DBE Spektren im LSB invers zu der Himmelsfrequenz laufen (da gab es mal ein Mißverständnis), im USB mit der Himmelsfrequenz, und wir sollten Signal auf 100-1700 MHz haben in dem 0-2048 MHz Band. LO1 Frequenz war 92.101000 GHz, wir sind also 1 MHz verschoben relativ zu Pico. Unser 1PPS Signal sollte einen mittleren Null Offset relativ zu GPS haben, ich hoffe, die Zero Crossings werden Euch nicht stören. Drift sollte sehr klein sein, unser Fit gab zero Drift. VLBI antenna war A9, auf Pad Position E03 4523999.442, 468067.530, 4460310.069 (nach Dave Graham's Skript). Wir waren für alle 3 Scans auf der 5 MHz Referenz der Masers, genau wie für die 1.3 mm Daten. Die Quellen wurden lokal sehr gut detektiert.
- Email Bremer (5.2.2020) :
LSB: B1:Fsky=LO1-7000-IF_R2DBE, B2:Fsky=LO1-5000-IF_R2DBE B1: in the R2DBE [0, 2048] MHz => on the sky [85101, 83053] MHz B2: in the R2DBE [0, 2048] MHz => on the sky [87101, 85053] MHz USB: B3:Fsky=LO1+5000+IF_R2DBE, B4:Fsky=LO1+7000+IF_R2DBE B3: in the R2DBE [0, 2048] MHz => on the sky [97101, 99149] MHz B4: in the R2DBE [0, 2048] MHz => on the sky [99101, 101149] MHz
- Gino Tuccari (5.2.2020) :
The 0-2G|2-4G FIRs do not flip the baseband orientation. The baseband orientation depends on the 4-12G IF, Valon LO tuning, analog filtering. --tjan24: in practice, oct2-4 is flipped by FIR/shift, oct0-2 is not flipped! Also seen at Pico with spectral line.
Basebands
- NOEMA signal chain
| Band | backend | recorder | sky | netSB | |
|---|---|---|---|---|---|
| b1: LSB hi | r2dbe1 | recorder1 (Mark6-4129); collected | 83053 - 85101 | lsb | |
| b2: LSB_lo | r2dbe2 | recorder2 (Mark6-4124); collected | 85053 - 87101 | lsb | |
| b3: USB_lo | r2dbe3 | recorder3 (Mark6-4130); collected | 97101 - 99149 | usb | |
| b4: USB_hi | r2dbe4 | recorder4 (Mark6-4131); collected | 99101 - 101149 | usb |
- Pico calculations
1st LO 92100 B3,B4 : 1st USB : bdc1 5-7|7-9 at 99100M mid : 5-7:97052..99100 | 7-9:99100..101148 B1,B2 : 1st LSB : LO 9.048G lsb : net usb start at 83052M : oct0-2:83052-85100 | 2-4:85100-87148
- PV signal chain
| Band | backend | recorder | sky | netSB | |
|---|---|---|---|---|---|
| b1: LSB hi | DBBC3 | recorder4; collected | 83052 - 85100 | usb | |
| b2: LSB_lo | DBBC3 | recorder3, as-is | 85100 - 87148 | lsb | |
| b3: USB_lo | r2dbe2 | recorder2; collected | 97052 - 99100 | lsb | |
| b4: USB_hi | r2dbe1 | recorder1; collected | 99100 - 101148 | usb |
Issues
- Data weights for PV-RR are reduced. On the 4-module set containing "hand-carry" copies of the other 4-set modules, copied modules have 6 out of the 16 fragment files per scan missing. Apparantly the copy procedure was incomplete. Affects bands 1, 3, and 4.
