diff options
| -rw-r--r-- | Documentation/DocBook/media/v4l/vidioc-g-modulator.xml | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-modulator.xml b/Documentation/DocBook/media/v4l/vidioc-g-modulator.xml index 80167fc4483d..96e17b344c5d 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-modulator.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-modulator.xml @@ -78,6 +78,12 @@ different audio modulation if the request cannot be satisfied. However this is a write-only ioctl, it does not return the actual audio modulation selected.</para> + <para><link linkend="sdr">SDR</link> specific modulator types are +<constant>V4L2_TUNER_SDR</constant> and <constant>V4L2_TUNER_RF</constant>. +For SDR devices <structfield>txsubchans</structfield> field must be +initialized to zero. +The term 'modulator' means SDR transmitter in this context.</para> + <para>To change the radio frequency the &VIDIOC-S-FREQUENCY; ioctl is available.</para> |