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operations:documentation.test_tsys [2013/09/16 23:49]
David Horsley
operations:documentation.test_tsys [2013/09/25 06:18] (current)
Jim Lovell
Line 8: Line 8:
  
 Tsys measurements can be found in the ''​SysMon''​ group in the e-RemoteCtrl window; however, these are currently formatted strangely. To view the correct output, open an ssh connection to the fs computer and run ''​monit3''​. Tsys measurements can be found in the ''​SysMon''​ group in the e-RemoteCtrl window; however, these are currently formatted strangely. To view the correct output, open an ssh connection to the fs computer and run ''​monit3''​.
 +
 +===== monit3 output =====
 +
 +Below is an annotated copy of monit3 output for Hb:
 +
 +{{:​operations:​oper_s_x_desktop_pcfshb_1_.png|}}
 +
 +Tsys is measured in each of the four DBBC input bands in two ways:
 +  * Across the whole (up to) 512 MHz band without filtering, i.e. broad-band Tsys
 +  * Across each of the 16 recorded bands (usually 8 or 16 MHz wide), i.e. narrow-band Tsys
 +
 +The top four numbers show the broad-band Tsys values in K. In most cases IFA and IFB are the two X-band inputs and IFC and IFD are S-band.
 +
 +The table below shows the Tsys for each recorded band. //A value of 0.0 means no data.// In some cases (in this example, in BBCs 1 and 8) both Upper and Lower Side-Band (USB and LSB) are recorded but in most cases only USB is recorded.
 +
 +If there is interference then the broad-band Tsys values can be affected, but only the narrow band IFs with interference in their frequency range should show a bad value. In the example here, S-band is affected by interference as can be seen by the negative broadband value for IFC and very high number in BBC-13. The autocorrelation plots give a hint to where the interference is.
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/home/www/auscope/opswiki/data/pages/operations/documentation.test_tsys.txt · Last modified: 2013/09/25 06:18 by Jim Lovell