User Manual
Revision 1.03
3-2 ChannelMaster TX7 Transmitter
Modulation Modes
Modulation 1: .......................................... COFDM (DVB-T)
Carriers: ............................................... 2K
Constellation:....................................... QPSK, 16QAM, 64QAM
Code Rate:........................................... 1/2, 2/3, 3/4, 5/6, 7/8
Guard Interval: ..................................... 1/32, 1/16, 1/8, 1/4
Bandwidth: ........................................... 6 MHz, 7 MHz, and 8 MHz
Modulation 2: ........................................... Analog FM
2 field tunable sub-carriers (optional 4)
Modulation Deviation (field selectable): 3 MHz/volt or 4 MHz/volt
Modulation 3 (Optional):........................... VSB
Constellation:....................................... 2VSB, 8VSB, 8TVSB (ATSC)
Bandwidth: ........................................... 6 MHz
MPEG Encoder:
Video
SD Profile:............................................ MP@ML(4:2:0) 1-15MBPS
............................................................. 422@ML(4:2:2) 3-50MBPS
HD Profile:............................................ MP@HL
MP@H14L
GOP:.................................................... Front panel selectable, (I, IP, IBP, IBBP)
Latency: ............................................... Standard (GOP:1-5) ~250mS
Low Delay(GOP:0) ~90mS
Frame Size: ......................................... NTSC:720x480(4:2:0)/720x525(4:2:2)
PAL:720x576(4:2:0)/720x625(4:2:2)
720p(1280x720) 59.94,50,29.97,25,23.97Hz)
1080i(1920x1080) 29.97,25Hz
1080i(1440x1080) 29.97,25Hz
SDI input: ............................................. ANSI/SMPTE 259M(SD), 292M(HD)
Audio
Audio Coding: ...................................... ISO/IEC 11172-3(Layer II)
Audio Bit Rate:..................................... 128, 256kbps, 384kbps
Audio Sample Rate:............................. 48Khz
Audio Channels: .................................. 2 Standard (4 Optional)
Audio Input:.......................................... Line; Gain selectable (10dB), 600Ω Balanced
(18dBm = 0dBFS)
AES/EBU; 150Ω Balanced
DeEmbedded from SDI; (4 channels)
Tone; (-10dBfs/8dBm) Level Adjustable (-10 to
26dBfs)
Line/Mic; Input range: -4dB and 41dB
with selectable 10V Phantom Power
Frequency Response: ......................... 40Hz – 20KHz: ± 0.5dB
Audio THD: .......................................... 0.25% @ 1KHz, +8dBm
Signal-Noise: ....................................... >70dB