Dhm-2057 dvb-t sd&hd encoder & modulator with usb home use user manual.
Thank you for buying this encoder modulator. Please read this manual carefully to install, use and maintain the encoder modulator in the best conditions of performance. Keep this manual for future reference. Directory chapter 1 product introductions .....................................................
1 chapter 1 product introductions general description qm-products dhm-2057 hd&sd encoder & modulator is designed based on consumer electronics which allow audio/video signal input in tv distributions with applications in home entertainment, surveillance control, hotel digital signage, shops etc. It ...
2 technical specifications hdmi encoding section video encoding h.264 mp@l 3.0/3.1/4.0 interface hdmi*1 input output resolution 480@59.94/60p 480@60p 480@59.94/60i 480@30p 576@50i 576@25p 720@50/59.94/60p 720@50/59.94/60p 1080@50i 1080@25p 1080@59.94/60i 1080@30p 1080@59.94/60p 1080@30p aspect ratio...
3 dvb-t modulator section standard dvb-t cofdm bandwidth 6m, 7m, 8m 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 transmission mode: 2k, 8k mer ≥31db rf frequency 142.5~946 mhz, 1khz step rf output level -14~ +6dbm, 0.1db step system rf mix in...
4 chapter 2 safety instruction and installations safety instructions warning: hot plug is not allowed since it may cause system halted. To prevent fire or electrical shock, do not expose the device to rain or moisture. The encoder modulator is powered with a voltage of 12v dc. The power supply volta...
5 2. Connect the signal input in the respective connectors. The signal source can be from a surveillance monitor, dvd, set-top box, cctv and etc. 3. Optionally, connect the loop-through rf input coaxial cable. 4. Connect cable to rf output to stb/tv. 5. Power supply connection: a) connect the earth ...
6 chapter 3 operations and management dhm-2057 is controlled and managed through the key board and lcd display. Lcd display – it presents the selected menu and the parameter settings. The backlight in the display is on when the power is applied. Led – these lights indicate the working status power: ...
7 main menu modulator modulator constellation modulator fft modulator rf frequency modulator rf level modulator bandwidth constellation ►64qam rf frequency 650.000 mhz rf level -10.0 dbm bandwidth ►6m 8 9 10 11 12 13 initializing dvb-t 650.0mhz 1080i 6.93mbps lock enter menu 1 up down main menu stat...
8 1) dvb-t: modulating standard; xx.Xxx mhz: the current output frequency; 1080i: video resolution of signal source; x.Xx mbps: the current encoding bit rate 2) alarm status: for example, if the signals lose, it will give alarm and display error type under this menu. For example: video not lock 3) u...
9 ensure the output image quality, it is required the output code rate to be higher than 22 mhz. 16) save config: yes/no-to save/give up the adjustment of setting. 17) load saved cfg: yes/no-to load/ not to load the saved configuration. 18) factory reset: yes/no-choose/not choose the factory’s defau...
10 chapter 4 how to upgrade dhm-2057 encoder modulator is embedded with usb port for upgrading. The supported file format is img. Upgrade steps: insert usb device→upgrade automatically(it will need 10-20 seconds to upgrade.) →remove usb device→power off→power on. Usb port for upgrade.
11 appendix australia air channels australia air channels ch. Frequency ch. Frequency start center end start center end vhf c38 596 599.5 603 c39 603 606.5 610 c00 45 48.5 52 c40 610 613.5 617 c01 56 59.5 63 c41 617 620.5 624 c02 63 66.5 70 c42 624 627.5 631 c03 85 88.5 92 c43 631 634.5 638 c04 94 9...
12 modulation constellation fec 6mhz bandwidth 7mhz bandwidth 8mhz bandwidth guard interval guard interval guard interval 1/4 1/8 1/16 1/32 1/4 1/8 1/16 1/32 1/4 1/8 1/16 1/32 qpsk 1/2 the weak ability of error-correcting and anti-interference in this area 6.03 2/3 6.03 5.80 6.45 6.83 7.03 6.64 7.37...
13 declaration of conformity certify and declare under our sole responsibility that the following apparatus: dhm-2056 dhm-2057 dhm-2058 conforms with the essential requirements of the emc directive 2004/108/ec the safety directive 2006/95/ec and 2001/65/eu rohs directive, based on the following spec...
