Alcad DMH-141 Manual De Usuario página 35

1) DVB-T: modulating standard; XX.XXX M: the current output frequency; U: symbol of the
USB disk insertion; 1080i: video resolution of signal source; X.XX Mbps: the current
encoding bit rate
2) Alarm Status: For example, if the signal cable disconnected, it will display Video 1 Not
Lock under this menu.
3) Uptime: It displays the working time duration of the device. It times upon power on.
4) Video Parameters: User can enter the items respectively to view the video status and set
video norm. User can also adjust values of rest items (Bit rate: 0.500~19.500 Mbps;
Brightness & Contrast & Saturation: 0-255; Hue: -128 - +127).
5) Audio Bit rate: Select audio bit rate among 64, 96, 128, 192, 256, 320, 384 kbps.
Audio Broadcast: Enable – the output program will broadcast only audio without the
picture; Disable – cancel broadcast mode to resume both audio and video.
6) Program Information: User can enable or disable the program output under menu
Program Output. User can also enter the other items to edit the Service Name, Program
Name, Program Number, and PIDs of PMT, PCR, Video and Audio, and edit LCN (Logical
channel number). EIT Event – User can enter this menu to setup EIT (Event Information Table)
for the current and next program event. The EIT contains Start Year, Start Time, Duration,
and Event Name of the event. All the EIT information can be displayed on the TV screen on
condition that the EIT is chosen to insert (see explanation 18.). VCN – virtual channel
number
7) Bandwidth: choose between 6M, 7M and 8M.
8) Constellation: DVB-T modulator contains 3 constellation modes – 64 QAM, QPSK and
16 QAM.
9) FFT (Transmission Mode): 2K
10) Guard Interval: Select among 1/32, 1/16, 1/8 and 1/4.
11) Code Rate: It refers to FEC-Forward Error Correction rate. It contains 1/2, 2/3, 3/4,
5/6 and 7/8.
NOTE: The different combination of bandwidth, constellation, guard interval and
code rate (FEC) will form a different output code rate. Please refer to appendix table
2.
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