Generator is automatically switching off above 207mV

[mikelm345]

Hi All,

I have just started using REW to measure my DIY audio amlpifier designs - Really great software, thanks. But I am having one problem.

I have REW installed of two PCs a Desktop and a Laptop. Works just fine on the Desktop.

However, on the laptop when I increase the level of the signal on the generator to over 207mV it is regularly resetting ( swtching off ) with an error message saying that the SPL is too high.

I have calibrated the generator with the external sound card ( Xonar U7) line output so that part is OK.

I need to generate about 300mV to get the desired test level on the amplifier.

The initial test O/P of the amp ( 5v peak ) is attenuated down to 0.455V with a 1k / 100 ohm divider before being fed into the line input of the sound card ( well within the limits of the soundcard line input )

So on the face of it there is no reason for the generator to be automatically reset - but yet it is resetting repeatedly.

If someone can pont me in the right direction to fix this problem, that would be great.

Many thanks

mike mears

 

[John Mulcahy]

Just uncheck this box on the generator:

If you wanted to use an SPL limit (or measure SPL) at some point then go through the SPL meter SPL calibration.

 

[mikelm345]

Just uncheck this box on the generator:

Many thanks