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Setting up PSA (w/option 241) to measure EVM

Question asked by tonyB on Jan 15, 2010
Latest reply on Apr 20, 2010 by tabbott
I have programmed my E4443A to measure EVM. The problem is that after issuing the :INIT:EVM command, the analyzer immediately starts taking a measurement and will not process qued commands in the buffer until it has finished with the 10 averages that it starts. After the averaging has finished, then it process the remaining commands. This is quite anoying and hopem there is a simple fix. The command sequence I use is below.

*RST;
:INST DEMODULATION;:FREQ:CENT <nn>;:RAD:STAN:MOD D8PSK;:RAD:STAN:FILT:MEAS NONE;:RAD:STAN:FILT:REF NYQ;
:RAD:STAN:ALPH 0.6;:RAD:STAN:SRAT 10.5e3;
:INIT:EVM;:EVM:TRIG:SOUR EXT;
:TRIG:EXT1:DEL .0005;
:EVM:SWE:POIN 100;
:INIT:CONT OFF;:POW:ATT 25 dB

All in that sequence. Please help. Thanks,  

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