<div dir="ltr">How do I force QAM256 for tuning? <br><br>After fighting with the cable and digital tuners (present in both a HDHR and pcHDTV-5500) for a while, I have found that it appears that when I tune a channel it is automatically determining the frequency. <br>
When issuing the following commands<br>hdhomerun_config FFFFFFFF set /tuner0/channel 105<br>hdhomerun_config FFFFFFFF set /tuner0/channel qam256:105<br>the results differ drastically. If I do not specify the modulation as in the first example, the process of auto-identifying can take anywhere from a couple seconds to minutes. If I specify the modulation, it locks on within a couple seconds. By comparing the observed behavior, it appears that tuning from MythTV is setting it in the auto mode. Looking in mythtv-setup, I could not find an option to force the modulation. Is this a supported configuration value somehow?<br>
<br>My other channels seem to lock on to QAM256 right away but only channel 105 gives me trouble very frequently. My signals are acceptable and once locked it plays a strong stream. Am I misdiagnosing the problem and I should be looking somewhere else?<br>
<br>Thanks,<br>LT<br></div>