# Method DVB.dvb()->tune()

Method tune

  `int tune(int(2bit) lnb, int freq, bool|string pol, int sr)`

Description

  Tunes to apropriate transponder's parameters.

Parameter `lnb`

  DiSeQc number of LNB.

Parameter `freq`

  Frequency divided by 1000.

Parameter `pol`

  Polarization. `0` or `"v"` for vertical type, `1` or `"h"` for horizontal one.

Parameter `sr`

  The service rate parameter.