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 fsl_operatingmanual_en_12.pdf