Same issue here. If I set the network type ISDB-T, I can´t attach this to the adapter....and if I add DVB-T type and add manually the muxes or add Taiwan Muxes, this don´t find anything....

And the adapters works fine, this is the result from scan:

>>> tune to: 521142857:INVERSION_AUTO:BANDWIDTH_6_MHZ:FEC_3_4:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_NONE
0x0000 0xe720: pmt_pid 0x1000 Arsat -- ENCUENTRO (running, scrambled)
0x0000 0xe722: pmt_pid 0x1010 Arsat -- TATETI (running, scrambled)
0x0000 0xe723: pmt_pid 0x1020 Arsat -- INCAA TV (running, scrambled)
0x0000 0xe724: pmt_pid 0x1030 Arsat -- TEC TV (running, scrambled)
0x0000 0xe738: pmt_pid 0x1fc8 Arsat -- ENCUENTRO PORTABLE (running, scrambled)
0x0000 0xe721: pmt_pid 0x1050 Arsat -- PAKA PAKA (running)
Network Name 'Canal 22'
>>> tune to: 527142857:INVERSION_AUTO:BANDWIDTH_6_MHZ:FEC_3_4:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_NONE
Network Name 'Canal 23'
0x0000 0xe740: pmt_pid 0x1000 Arsat -- TV PUBLICA HD (running, scrambled)
0x0000 0xe741: pmt_pid 0x1010 Arsat -- CONSTRUIR TV (running, scrambled)
0x0000 0xe758: pmt_pid 0x1fc8 Arsat -- TV PUBLICA PORTABLE (running, scrambled)
>>> tune to: 533142857:INVERSION_AUTO:BANDWIDTH_6_MHZ:FEC_3_4:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_NONE
Network Name 'Canal 24'
0x0000 0xe760: pmt_pid 0x1000 Arsat -- DEPORTV HD (running, scrambled)
0x0000 0xe761: pmt_pid 0x1010 Arsat -- VIVRA (running, scrambled)
0x0000 0xe762: pmt_pid 0x1020 Arsat -- ARPEGGIO (running, scrambled)
0x0000 0xe763: pmt_pid 0x1030 Arsat -- VIAJAR (running, scrambled)
0x0000 0xe778: pmt_pid 0x1fc8 Arsat -- DEPORTV PORTABLE (running, scrambled)
>>> tune to: 539142857:INVERSION_AUTO:BANDWIDTH_6_MHZ:FEC_3_4:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_NONE
Network Name 'Canal 25'
0x0000 0xe780: pmt_pid 0x1000 Arsat -- CN23 (running, scrambled)
0x0000 0xe781: pmt_pid 0x1010 Arsat -- C5N (running, scrambled)
0x0000 0xe782: pmt_pid 0x1020 Arsat -- TELESUR (running, scrambled)
0x0000 0xe783: pmt_pid 0x1030 Arsat -- 360 TV (running, scrambled)
0x0000 0xe784: pmt_pid 0x1040 Arsat -- RT (running, scrambled)

0x0000 0xe798: pmt_pid 0x1fc8 Arsat -- CN23 PORTABLE (running, scrambled)

But with tvheadend don´t find anything

2016-05-06 18:25:26.573 [ INFO] mpegts: 521.142MHz in TDA - tuning on DiBcom 8000 ISDB-T : DVB-T #0
2016-05-06 18:25:26.573 [ INFO] subscription: 0010: "scan" subscribing to mux "521.142MHz", weight: 6, adapter: "DiBcom 8000 ISDB-T : DVB-T #0", network: "TDA", service: "Raw PID Subscription"
2016-05-06 18:25:36.382 [ INFO] mpegts: 521.142MHz in TDA - scan no data, failed
2016-05-06 18:25:36.382 [ INFO] subscription: 0010: "scan" unsubscribing
2016-05-06 18:26:04.259 [ INFO] mpegts: 521.142MHz in TDA - tuning on DiBcom 8000 ISDB-T : DVB-T #0
2016-05-06 18:26:04.260 [ INFO] subscription: 0011: "scan" subscribing to mux "521.142MHz", weight: 6, adapter: "DiBcom 8000 ISDB-T : DVB-T #0", network: "TDA", service: "Raw PID Subscription"
2016-05-06 18:26:14.071 [ INFO] mpegts: 521.142MHz in TDA - scan no data, failed
2016-05-06 18:26:14.071 [ INFO] subscription: 0011: "scan" unsubscribing
2016-05-06 18:29:47.753 [ INFO] mpegts: 521.142MHz in TDA - tuning on DiBcom 8000 ISDB-T : DVB-T #0
2016-05-06 18:29:47.769 [ INFO] subscription: 0012: "scan" subscribing to mux "521.142MHz", weight: 6, adapter: "DiBcom 8000 ISDB-T : DVB-T #0", network: "TDA", service: "Raw PID Subscription"
2016-05-06 18:29:57.579 [ INFO] mpegts: 521.142MHz in TDA - scan no data, failed
2016-05-06 18:29:57.579 [ INFO] subscription: 0012: "scan" unsubscribing
2016-05-06 18:31:28.502 [ INFO] mpegts: 521.142MHz in TDA - tuning on DiBcom 8000 ISDB-T : DVB-T #0
2016-05-06 18:31:28.502 [ INFO] subscription: 0013: "scan" subscribing to mux "521.142MHz", weight: 6, adapter: "DiBcom 8000 ISDB-T : DVB-T #0", network: "TDA", service: "Raw PID Subscription"
2016-05-06 18:31:38.310 [ INFO] mpegts: 521.142MHz in TDA - scan no data, failed
2016-05-06 18:31:38.310 [ INFO] subscription: 0013: "scan" unsubscribing
2016-05-06 18:32:28.414 [ INFO] mpegts: 521.142MHz in TDA - tuning on DiBcom 8000 ISDB-T : DVB-T #0
2016-05-06 18:32:28.414 [ INFO] subscription: 0014: "scan" subscribing to mux "521.142MHz", weight: 6, adapter: "DiBcom 8000 ISDB-T : DVB-T #0", network: "TDA", service: "Raw PID Subscription"
2016-05-06 18:32:38.247 [ INFO] mpegts: 521.142MHz in TDA - scan no data, failed
2016-05-06 18:32:38.247 [ INFO] subscription: 0014: "scan" unsubscribing
2016-05-06 18:32:57.793 [ INFO] mpegts: 521.142MHz in TDA - tuning on DiBcom 8000 ISDB-T : DVB-T #0
2016-05-06 18:32:57.794 [ INFO] subscription: 0015: "scan" subscribing to mux "521.142MHz", weight: 6, adapter: "DiBcom 8000 ISDB-T : DVB-T #0", network: "TDA", service: "Raw PID Subscription"
2016-05-06 18:33:07.603 [ INFO] mpegts: 521.142MHz in TDA - scan no data, failed
2016-05-06 18:33:07.603 [ INFO] subscription: 0015: "scan" unsubscribing
2016-05-06 18:33:10.389 [ INFO] mpegts: 521.142MHz in TDA - tuning on DiBcom 8000 ISDB-T : DVB-T #0
2016-05-06 18:33:10.389 [ INFO] subscription: 0016: "scan" subscribing to mux "521.142MHz", weight: 6, adapter: "DiBcom 8000 ISDB-T : DVB-T #0", network: "TDA", service: "Raw PID Subscription"
2016-05-06 18:33:20.199 [ INFO] mpegts: 521.142MHz in TDA - scan no data, failed
2016-05-06 18:33:20.199 [ INFO] subscription: 0016: "scan" unsubscribing
2016-05-06 18:33:49.591 [ INFO] mpegts: 521.142MHz in TDA - tuning on DiBcom 8000 ISDB-T : DVB-T #0
2016-05-06 18:33:49.592 [ INFO] subscription: 0017: "scan" subscribing to mux "521.142MHz", weight: 6, adapter: "DiBcom 8000 ISDB-T : DVB-T #0", network: "TDA", service: "Raw PID Subscription"
2016-05-06 18:33:59.397 [ INFO] mpegts: 521.142MHz in TDA - scan no data, failed
2016-05-06 18:33:59.397 [ INFO] subscription: 0017: "scan" unsubscribing
2016-05-06 18:35:18.174 [ INFO] mpegts: 521.142MHz in TDA - tuning on DiBcom 8000 ISDB-T : DVB-T #0
2016-05-06 18:35:18.174 [ INFO] subscription: 0018: "scan" subscribing to mux "521.142MHz", weight: 6, adapter: "DiBcom 8000 ISDB-T : DVB-T #0", network: "TDA", service: "Raw PID Subscription"
2016-05-06 18:35:27.983 [ INFO] mpegts: 521.142MHz in TDA - scan no data, failed
2016-05-06 18:35:27.983 [ INFO] subscription: 0018: "scan" unsubscribing
2016-05-06 18:35:53.695 [ INFO] mpegts: 527.142MHz in TDA - tuning on DiBcom 8000 ISDB-T : DVB-T #0
2016-05-06 18:35:53.695 [ INFO] subscription: 0019: "scan" subscribing to mux "527.142MHz", weight: 6, adapter: "DiBcom 8000 ISDB-T : DVB-T #0", network: "TDA", service: "Raw PID Subscription"
2016-05-06 18:36:03.564 [ INFO] mpegts: 527.142MHz in TDA - scan no data, failed
2016-05-06 18:36:03.564 [ INFO] subscription: 0019: "scan" unsubscribing