#######################################################################
# 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