####################################################################### # Summary of MD tests carried out on 18/19 July 2014 ###################################################################### # Antennas : 11 CM Antennas # Correlator: ACA # Setup Pointing & Focus done in Band 3 # Antenna Tested in MD mode: CM01 ###################################################################### # Test 3.2.1 ###################################################################### # CCL commands for manual detuning

ant='CM01'

c3=ColdCart3(ant)

status(c3)

# other screen

ant='CM01'

c3=ColdCart3(ant)

c3.SET_POL0_SB1_SIS_VOLTAGE(8.5e-3)

c3.SET_POL0_SB2_SIS_VOLTAGE(8.5e-3)

c3.SET_POL1_SB1_SIS_VOLTAGE(8.5e-3)

c3.SET_POL1_SB2_SIS_VOLTAGE(8.5e-3)

################################### # First delaycal, SD mode ###################################

DelayCal.py -b 3 -s 1924-292 -a Array012 -d 30 -T -r 1

ASDM =uid://A002/X8719c8/X11bd

################################### # 2nd delaycal with MD ###################################

DelayCal.py -b 3 -s 1924-292 -a Array012 -d 600 -T -r 2

ASDM =uid://A002/X8719c8/X11ca

1) First Scan, delay measurements on 1924-292.

After 8 mins going to MD:

c3.SET_POL0_SB1_SIS_VOLTAGE(8.5e-3)

c3.SET_POL0_SB2_SIS_VOLTAGE(8.5e-3)

c3.SET_POL1_SB1_SIS_VOLTAGE(8.5e-3)

c3.SET_POL1_SB2_SIS_VOLTAGE(8.5e-3)

After 2 mins back to SM:

c3.SET_POL0_SB1_SIS_VOLTAGE(10.35e-3)

c3.SET_POL0_SB2_SIS_VOLTAGE(10.35e-3)

c3.SET_POL1_SB1_SIS_VOLTAGE(10.35e-3)

c3.SET_POL1_SB2_SIS_VOLTAGE(10.35e-3)

2) Then ATM Cal scan is performed by the script ( -T option)

3) Third scan, delay measurements on 1924-292:

Changing: SM -> DM -> SM -> DM -> SM -> DM (roughly every 2 mins)

######################################################################## # Second Test on how control system behaves with MD mode #######################################################################

1) Delay cal without ATM cal and with MD hardcoded in the script. The de-tuning commands is executed before the delayCal.execute(mode) command, which is the one that performes the delay mesurements.

Optimization of the IF attenuators are done only during the first occurrence of delayCal.execute(mode). That is, the attenuators are optimized in MD mode on the calibrator.

/users/ahales/SolarCampaign2014/DelayCal_MD.py -b 3 -s 1924-292 -a Array012 -d 30 -r 4

ASDM =uid://A002/X8719c8/X1282

We confirm that the delayCal.execute(mode) command does optimize the attenuations settings on the first sub-scan (to 1 V as normal), but does not change the SIS mixer Voltage values:

SIS USB Mode: Closed LoopV: 8.5373[mV] I: 17.1509[uA] SIS LSB Mode: Closed LoopV: 8.5487[mV] I: 15.6250[uA] SIS USB Mode: Closed LoopV: 8.5197[mV] I: 19.2871[uA] SIS LSB Mode: Closed LoopV: 8.5197[mV] I: 27.6489[uA]

2) Delay cal with ATM cal and with MD hardcoded in the script (before the delayCal.execute(mode) command)

/users/ahales/SolarCampaign2014/DelayCal_MD.py -b 3 -s 1924-292 -a Array012 -d 60 -T -r 4

ASDM = uid://A002/X8719c8/X12f0

The SIS mixer Voltage values remain detuned throughout the entire observation, including the ATM calibrations.


Note:

We ran SimpleContinuumTest.py on Uranus afterwards, and this does change the SIS Voltage values to the system defaults:

SimpleContinuumTest.py -b 3 -s Uranus

ASDM = uid://A002/X8719c8/X13b5

/ SIS USB Mode: Closed LoopV: 10.3416[mV] I: 37.5977[uA] / / SIS LSB Mode: Closed LoopV: 10.4218[mV] I: 40.7104[uA] / / SIS LSB Mode: Closed LoopV: 10.3149[mV] I: 51.2695[uA] / / SIS LSB Mode: Closed LoopV: 10.3180[mV] I: 52.1851[uA] /

The same happens if we do normal DelayCal.py. So, it appears that the system does set the mixer voltage values to default when starting any new observation (as expected). These default settings are read from lookup file that is harcoded somewhere in the ALMA software. It is easy to find out what these values are (using a script Giorgio showed me).

######################################################################## # Test 3.2.2: Observe Sun and phase cal in MD mode #######################################################################

1) simple delayCal on quasar (~3.8 Jy in Band3)

/users/ahales/SolarCampaign2014/DelayCal.py -b 3 -s 1058+015 -a Array012 -d 30

2) delayCal on quasar in MD mode

/users/ahales/SolarCampaign2014/DelayCal_MD.py -b 3 -s Sun,1058+015 -a Array012 -d 30 -r 4

ASDM = uid://A002/X872bbc/Xcdb

###################### # Final test on Sun ######################

1) delayCal on Sun and quasar in MD mode. The scripts first maximizes attenuators (for safety) then points to the, Sun de-tunes the mixer, then points to Sun, then optimzes Attenuators on Sun, and then observes the Sun and then 2 calibrators on detuned mode.

/users/ahales/SolarCampaign2014/SunDelayCal-internalEphem-MD.py -W Sun --calibrator1 1058+015 --calibrator2 0854+201 -d 30 -b 3

uid://A002/X872bbc/Xe68

/users/ahales/SolarCampaign2014/SunDelayCal-internalEphem-MD.py -W Sun --calibrator1 1058+015 --calibrator2 0854+201 -d 60 -b 3 -r 2

uid://A002/X872bbc/Xea6

-- AnthonyRemijan - 2014-09-13
Topic revision: r1 - 2014-09-13, AnthonyRemijan
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