usning SMASPLT to get the spectral windows only.
the usage is given in the example script:
http://www.cfa.harvard.edu/sma/miriad/spec/SMAscripts/modes/1RxPolar/4GHz/Ver1.0/sma4GHz1Rx_poltst.txt
#####################################
#Separate the ch0 from spectral windows
#####################################
SMASPLT:
\rm -r $fname.tsys.$nw
smasplt vis=$fname.tsys  out=$fname.tsys.$nw

JHZ




On Thu, 7 Jul 2011 girart@ice.cat wrote:

Below is the result of the form submission.  It was submitted by
 (girart@ice.cat) on Thursday, July 7, 2011 at 16:49:19
---------------------------------------------------------------------------

Logging to SMAMBugRpt

Bug Tracking No 	 22

User_Name: Josep M Girart

Report_Type: Bug

Severity: Normal

Priority: Medium

Linux: CentOS

Linux_Other:

Linux_Ver:

Kernel:

Hardware: neptune.cfa.harvard.edu

Occured_When: Task

Occured_Notes: smalod version beta 1.3.1. 2011-06-15

Description: SMALOD created an extra window (a total of 49 instead of 48), with just one channel, which makes bandpass calibration not possible. This happened when reading a 4 GHz pol observations taken on 110618. Fortunately, this can be easliy corrected using:
uvaver select=-win(1)
and from here proceed with the standard reduction

Terminal:  guesta59 neptune 33 uvlist options=spec vis=110618_rx1.usb.tsys
UVLIST: version beta 28-Jul-10
  UV Listing for 110618_rx1.usb.tsys
  Options: brief,spectra
------------------------------------------------------------
rest frequency     : 345.79600 345.79600 345.79600 345.79600 345.79600 345.79600
starting channel   :         1         2       130       258       386       514
number of channels :         1       128       128       128       128       128
starting frequency : 345.80641 344.02322 344.10522 344.18041 344.26241 344.35122
frequency interval :   0.41600   0.00081   0.00081   0.00081   0.00081   0.00081
starting velocity  :    -3.270  1542.658  1471.569  1406.385  1335.295  1258.300
ending velocity    :    -3.270  1453.200  1382.110  1316.927  1245.837  1168.842
velocity interval  :  -360.657    -0.704    -0.704    -0.704    -0.704    -0.704
...

Supplied_Code:

---------------------------------------------------------------------------