Doubt regarding fft_sink_c

Hello.

I am trying to use a FFT as an spectrum analyzer so I chose the*
fft_sink_c*class into the module
wxgui.fftsink2.py*. *I couldn’t find an option in the constructor to
set
the time per division (horizontal axis) and everytime I tried, it has a
value of 50 kHz.

I would like to ask you if it is possible to set the time per division
with
another value or if this setting depends on another variables.

I am using Ubuntu 10.10, Python 2.6 and GNU Radio driver.

Greetings.

Eduardo.