====Instructions for commands to control the Rohde and Schwarz FSL18 over the ethernet====

These instructions should work for the 3 GHz spectrum analysers as well, however, they have not been tested and there seem to be some variations as to how different models of the Rohde and Schwarz spectrum analysers interpret these commands (or at least different generations).

You can view the spectrum analyser through a VNC connection to spechb.phys.utas.edu.au:5900 (usual password)\\

Once the instrument has the ethernet connected \\
''telnet spechb.phys.utas.edu.au 5025''\\
No password is required and you can then start entering commands to the spectrum analyser.  This interface has some limitations in that no error messages are returned, so if you type an invalid command, nothing happens, but there is no indication (if you aren't looking at the spectrum analyser) that there is a problem **NOTE:** It seems that there can only be one active connection at a time, so if valid commands are performing as expected, make sure that there are no competing connections:

==Setting the observed band==
To look at the range 1-3 GHz\\
''FREQ:START 1GHZ''\\
''FREQ:STOP 3GHZ''\\
To query settings replace the value with a ? right at the end of the command\\
''FREQ:STOP?''

==To set the reference level and range==
To set the reference level to -60 dB with a 20 dB range\\
''DISP:TRAC:Y:RLEV -60''\\
''DISP:TRAC:Y 20DB''

==To measure different things with different traces==
To look at maxhold on trace2 and the average of 1000 sweeps on trace 3
''DISP:TRAC2:MODE MAXH''\\
''DISP:TRAC3:MODE AVERAGE''\\
''SWE:COUNT 1000''

==To change sweep times, resolution and video bandwidth==
''SWE:TIME:AUTO ON''\\
''SWE:TIME 1s''\\
''BAND:RES:AUTO ON''\\
''BAND:RES 100KHZ''\\
''BAND:VID 100KHZ''\\

==To change the input attenuation (probably best left on auto)==
''INP:ATT 0''\\
''INP:ATT:AUTO ON''\\

The PDF of the manual {{hardware:fsl_operatingmanual_en_12.pdf?linkonly}}