Tvheadend

Hi,
I am new to DVB-T and TVheadend system and I need your help for setting it properly.
I have Raspberry Pi 3 and installed LibreElec including Kodi on it. It works properly, it streams videos from youtube etc.
So I want to add TV functionality to system. I installed TVheadend 4.0 Add-on and try to scan channels.
It shows "FAIL" as scan result in Muxes tab.
What can be the problem?
I am posting dmesg output and status messages in tvheadend as well.

[ 1314.684013] usb 1-1.2: new high-speed USB device number 5 using dwc_otg
[ 1314.780661] usb 1-1.2: New USB device found, idVendor=eb1a, idProduct=2881
[ 1314.780684] usb 1-1.2: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[ 1314.780696] usb 1-1.2: Product: USB 2881 Video
[ 1314.810477] Linux video capture interface: v2.00
[ 1314.828397] em28xx: New device USB 2881 Video [at] 480 Mbps (eb1a:2881, interface 0, class 0)
[ 1314.828417] em28xx: Video interface 0 found: isoc
[ 1314.828426] em28xx: DVB interface 0 found: isoc
[ 1314.828767] em28xx: chip ID is em2882/3
[ 1314.904255] em2882/3 #0: EEPROM ID = 56 ae 11 85, EEPROM hash = 0x56741226
[ 1314.904274] em2882/3 #0: EEPROM info:
[ 1314.904282] em2882/3 #0: AC97 audio (5 sample rates)
[ 1314.904290] em2882/3 #0: USB Remote wakeup capable
[ 1314.904298] em2882/3 #0: 500mA max power
[ 1314.904309] em2882/3 #0: Table at offset 0x04, strings=0x206a, 0x006a, 0x0000
[ 1314.906839] em2882/3 #0: No sensor detected
[ 1314.906845] em2882/3 #0: Your board has no unique USB ID.
[ 1314.906850] em2882/3 #0: A hint were successfully done, based on eeprom hash.
[ 1314.906854] em2882/3 #0: This method is not 100% failproof.
[ 1314.906859] em2882/3 #0: If the board were missdetected, please email this log to:
[ 1314.906862] em2882/3 #0: V4L Mailing List <[email protected]>
[ 1314.906867] em2882/3 #0: Board detected as Pinnacle Hybrid Pro
[ 1315.020635] em2882/3 #0: Identified as Pinnacle Hybrid Pro (card=53)
[ 1315.020650] em2882/3 #0: analog set to isoc mode.
[ 1315.020655] em2882/3 #0: dvb set to isoc mode.
[ 1315.020793] em28xx audio device (eb1a:2881): interface 1, class 1
[ 1315.020827] em28xx audio device (eb1a:2881): interface 2, class 1
[ 1315.020923] usbcore: registered new interface driver em28xx
[ 1315.062057] usbcore: registered new interface driver snd-usb-audio
[ 1315.094387] em2882/3 #0: Binding DVB extension
[ 1315.250963] xc2028 3-0061: creating new instance
[ 1315.250977] xc2028 3-0061: type set to XCeive xc2028/xc3028 tuner
[ 1315.250994] em2882/3 #0: em2882/3 #0/2: xc3028 attached
[ 1315.251001] DVB: registering new adapter (em2882/3 #0)
[ 1315.251016] usb 1-1.2: DVB: registering adapter 0 frontend 0 (Zarlink ZL10353 DVB-T)...
[ 1315.252341] em2882/3 #0: DVB extension successfully initialized
[ 1315.252358] em28xx: Registered (Em28xx dvb Extension) extension
[ 1315.259772] xc2028 3-0061: Loading 80 firmware images from *xc3028-v27.fw*, type: xc2028 firmware, ver 2.7
[ 3194.360213] usb 1-1.2: DVB: adapter 0 frontend 0 frequency 0 out of range (174000000..862000000)
[ 3242.059548] TCP: request_sock_TCP: Possible SYN flooding on port 9981. Dropping request. Check SNMP counters.
[ 3462.180944] xc2028 3-0061: Loading firmware for type=BASE F8MHZ (3), id 0000000000000000.
[ 3463.164968] xc2028 3-0061: Loading firmware for type=D2633 DTV8 (210), id 0000000000000000.
[ 3463.179171] xc2028 3-0061: Loading SCODE for type=DTV6 QAM DTV7 DTV78 DTV8 ZARLINK456 SCODE HAS_IF_4760 (620003e0), id 0000000000000000.

And Status window in tvheadend (IP:9981)


....
2016-12-08 13:29:12.025 subscription: 0056: "scan" subscribing to mux "570MHz", weight: 5, adapter: "Zarlink ZL10353 DVB-T : DVB-T #0", network: "NetworkName", service: "Raw PID Subscription"
2016-12-08 13:29:17.000 mpegts: 570MHz in NetworkName - scan no data, failed
2016-12-08 13:29:17.000 subscription: 0056: "scan" unsubscribing
2016-12-08 13:29:17.001 mpegts: 562MHz in NetworkName - tuning on Zarlink ZL10353 DVB-T : DVB-T #0
2016-12-08 13:29:17.002 opentv-skyit: registering mux 562MHz in NetworkName
2016-12-08 13:29:17.024 subscription: 0058: "scan" subscribing to mux "562MHz", weight: 5, adapter: "Zarlink ZL10353 DVB-T : DVB-T #0", network: "NetworkName", service: "Raw PID Subscription"
2016-12-08 13:29:22.000 mpegts: 562MHz in NetworkName - scan no data, failed
2016-12-08 13:29:22.000 subscription: 0058: "scan" unsubscribing
2016-12-08 13:29:22.002 mpegts: 554MHz in NetworkName - tuning on Zarlink ZL10353 DVB-T : DVB-T #0
2016-12-08 13:29:22.002 opentv-skyit: registering mux 554MHz in NetworkName
2016-12-08 13:29:22.025 subscription: 005A: "scan" subscribing to mux "554MHz", weight: 5, adapter: "Zarlink ZL10353 DVB-T : DVB-T #0", network: "NetworkName", service: "Raw PID Subscription"
2016-12-08 13:29:27.000 mpegts: 554MHz in NetworkName - scan no data, failed
2016-12-08 13:29:27.000 subscription: 005A: "scan" unsubscribing
2016-12-08 13:29:27.001 mpegts: 546MHz in NetworkName - tuning on Zarlink ZL10353 DVB-T : DVB-T #0
2016-12-08 13:29:27.001 opentv-skyit: registering mux 546MHz in NetworkName
2016-12-08 13:29:27.023 subscription: 005C: "scan" subscribing to mux "546MHz", weight: 5, adapter: "Zarlink ZL10353 DVB-T : DVB-T #0", network: "NetworkName", service: "Raw PID Subscription"
2016-12-08 13:29:32.000 mpegts: 546MHz in NetworkName - scan no data, failed
2016-12-08 13:29:32.000 subscription: 005C: "scan" unsubscribing
2016-12-08 13:29:32.001 mpegts: 538MHz in NetworkName - tuning on Zarlink ZL10353 DVB-T : DVB-T #0
2016-12-08 13:29:32.002 opentv-skyit: registering mux 538MHz in NetworkName
2016-12-08 13:29:32.025 subscription: 005E: "scan" subscribing to mux "538MHz", weight: 5, adapter: "Zarlink ZL10353 DVB-T : DVB-T #0", network: "NetworkName", service: "Raw PID Subscription"
2016-12-08 13:29:37.001 mpegts: 538MHz in NetworkName - scan no data, failed
2016-12-08 13:29:37.001 subscription: 005E: "scan" unsubscribing
2016-12-08 13:29:37.003 mpegts: 530MHz in NetworkName - tuning on Zarlink ZL10353 DVB-T : DVB-T #0
2016-12-08 13:29:37.003 opentv-skyit: registering mux 530MHz in NetworkName
2016-12-08 13:29:37.025 subscription: 0060: "scan" subscribing to mux "530MHz", weight: 5, adapter: "Zarlink ZL10353 DVB-T : DVB-T #0", network: "NetworkName", service: "Raw PID Subscription"
2016-12-08 13:29:42.000 mpegts: 530MHz in NetworkName - scan no data, failed
2016-12-08 13:29:42.001 subscription: 0060: "scan" unsubscribing
2016-12-08 13:29:42.002 mpegts: 522MHz in NetworkName - tuning on Zarlink ZL10353 DVB-T : DVB-T #0
2016-12-08 13:29:42.002 opentv-skyit: registering mux 522MHz in NetworkName
2016-12-08 13:29:42.027 subscription: 0062: "scan" subscribing to mux "522MHz", weight: 5, adapter: "Zarlink ZL10353 DVB-T : DVB-T #0", network: "NetworkName", service: "Raw PID Subscription"
2016-12-08 13:29:47.001 mpegts: 522MHz in NetworkName - scan no data, failed
2016-12-08 13:29:47.001 subscription: 0062: "scan" unsubscribing
2016-12-08 13:29:47.002 mpegts: 514MHz in NetworkName - tuning on Zarlink ZL10353 DVB-T : DVB-T #0
2016-12-08 13:29:47.003 opentv-skyit: registering mux 514MHz in NetworkName
2016-12-08 13:29:47.039 subscription: 0064: "scan" subscribing to mux "514MHz", weight: 5, adapter: "Zarlink ZL10353 DVB-T : DVB-T #0", network: "NetworkName", service: "Raw PID Subscription"
2016-12-08 13:29:52.001 mpegts: 514MHz in NetworkName - scan no data, failed
2016-12-08 13:29:52.001 subscription: 0064: "scan" unsubscribing
2016-12-08 13:29:52.002 mpegts: 506MHz in NetworkName - tuning on Zarlink ZL10353 DVB-T : DVB-T #0
2016-12-08 13:29:52.003 opentv-skyit: registering mux 506MHz in NetworkName
2016-12-08 13:29:52.026 subscription: 0066: "scan" subscribing to mux "506MHz", weight: 5, adapter: "Zarlink ZL10353 DVB-T : DVB-T #0", network: "NetworkName", service: "Raw PID Subscription"
2016-12-08 13:29:57.000 mpegts: 506MHz in NetworkName - scan no data, failed
2016-12-08 13:29:57.000 subscription: 0066: "scan" unsubscribing
2016-12-08 13:29:57.001 mpegts: 498MHz in NetworkName - tuning on Zarlink ZL10353 DVB-T : DVB-T #0
2016-12-08 13:29:57.002 opentv-skyit: registering mux 498MHz in NetworkName
2016-12-08 13:29:57.026 subscription: 0068: "scan" subscribing to mux "498MHz", weight: 5, adapter: "Zarlink ZL10353 DVB-T : DVB-T #0", network: "NetworkName", service: "Raw PID Subscription"
2016-12-08 13:30:02.001 mpegts: 498MHz in NetworkName - scan no data, failed
2016-12-08 13:30:02.001 subscription: 0068: "scan" unsubscribing
2016-12-08 13:30:02.003 mpegts: 490MHz in NetworkName - tuning on Zarlink ZL10353 DVB-T : DVB-T #0
2016-12-08 13:30:02.003 opentv-skyit: registering mux 490MHz in NetworkName
2016-12-08 13:30:02.025 subscription: 006A: "scan" subscribing to mux "490MHz", weight: 5, adapter: "Zarlink ZL10353 DVB-T : DVB-T #0", network: "NetworkName", service: "Raw PID Subscription"
2016-12-08 13:30:07.000 mpegts: 490MHz in NetworkName - scan no data, failed
2016-12-08 13:30:07.000 subscription: 006A: "scan" unsubscribing
2016-12-08 13:30:07.001 mpegts: 482MHz in NetworkName - tuning on Zarlink ZL10353 DVB-T : DVB-T #0
2016-12-08 13:30:07.002 opentv-skyit: registering mux 482MHz in NetworkName
2016-12-08 13:30:07.023 subscription: 006C: "scan" subscribing to mux "482MHz", weight: 5, adapter: "Zarlink ZL10353 DVB-T : DVB-T #0", network: "NetworkName", service: "Raw PID Subscription"
2016-12-08 13:30:12.000 mpegts: 482MHz in NetworkName - scan no data, failed
2016-12-08 13:30:12.000 subscription: 006C: "scan" unsubscribing
2016-12-08 13:30:12.001 mpegts: 474MHz in NetworkName - tuning on Zarlink ZL10353 DVB-T : DVB-T #0
2016-12-08 13:30:12.001 opentv-skyit: registering mux 474MHz in NetworkName
2016-12-08 13:30:12.025 subscription: 006E: "scan" subscribing to mux "474MHz", weight: 5, adapter: "Zarlink ZL10353 DVB-T : DVB-T #0", network: "NetworkName", service: "Raw PID Subscription"
2016-12-08 13:30:17.000 mpegts: 474MHz in NetworkName - scan no data, failed
2016-12-08 13:30:17.000 subscription: 006E: "scan" unsubscribing
2016-12-08 13:30:17.001 mpegts: 794MHz in NetworkName - tuning on Zarlink ZL10353 DVB-T : DVB-T #0
2016-12-08 13:30:17.001 subscription: 0070: "scan" subscribing to mux "794MHz", weight: 5, adapter: "Zarlink ZL10353 DVB-T : DVB-T #0", network: "NetworkName", service: "Raw PID Subscription"
2016-12-08 13:30:22.000 mpegts: 794MHz in NetworkName - scan no data, failed
2016-12-08 13:30:22.000 subscription: 0070: "scan" unsubscribing


What is "scan no data, failed" in status window? Does it mean that it doesn't receive anything?