I have the following two USB tuners connected to my Mac Mini:
- Cinergy T Stick DUAL RC (2xDVB-T)
- Terratec H7 (1xDVB-C, recently added)
- All tuners show good signal quality (98-100) for almost all channels.
- When timeshifting on two tuners simultaneously (2xDVB-T or DVB-T+DVB-C), no discontinuities are logged.
- When timeshifting on all three tuners simultaneously, many discontinuities are logged for the second DVB-T tuner. The first DVB-T tuner and the DVB-C tuner show no discontinuities. All tuners still show good signal quality. I have tried many different channel/tuner combinations; every time only the second DVB-T tuner shows these discontinuities.