ViewSonic VS10848-1M Service Manual page 15

Antenna Circuit:
Tuner (TUV1236D) has two RF inputs. Upwards was the connector of Terrestrial Input, Downwards was the
connector of CATV Input.
Terrestrial Input Connector ：
A.
Connects to your ATSC antenna and receives broadcasting signals. There are two signals, Analog TV
(NTSC signal) and Digital TV (ATSC signal) could be received.
Analog TV（NTSC signal）
Tuner TUV1236D receive the signal come from RF NTSC signal，Selects desired channel and
demodulate image composite signal (signal mark T1CVBS) by pin 14 of Tuner output to U19 PW328
decoder via path C224 and audio SIF signal (signal mark T1SND) by pin15 of Tuner output to U29
MSP4450G via C396 for demodulating MTS/SAP of Digital TV signal (ATSC
Digital TV (ATSC signal)
Tuner TUV1236D receive the signal come from ATSC signal，Selects desired channel and converts
analog signal into MPEG Transport Stream via Tuner TS1( Transport stream TS1DATA0-TS1DATA7)
bus into U35 PW2000 to separates MPEG video and AC3 digital
ViewSonic Corporation
audio.
14
Confidential - Do Not Copy
signal).
N3260w_N3760w
N4060w