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Table of Contents
Related Manuals for QM-products DHM-2057
Summary of Contents for QM-products DHM-2057
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Page 1: User Manual
DHM-2057 DVB-T SD&HD Encoder & Modulator with USB Home Use User Manual... -
Page 2: Table Of Contents
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 General Description ....................1 Working Principle .................... -
Page 3: Chapter 1 Product Introductions
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 is an all-in-one device integrating MPEG-4 AVC/H.264 encoding and modulating to convert audio/video signals into DVB-T RF out. -
Page 4: Technical Specifications
Technical Specifications HDMI Encoding Section Encoding H.264 MP@L 3.0/3.1/4.0 Interface HDMI*1 Input Output 480@59.94/60p 480@60p 480@59.94/60i 480@30p 576@50i 576@25p Video Resolution 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 16:9, 4:3 Bit rate 1.000~18.000 Mbps Encoding MPEGI layer 2 Audio Sample rate 48KHz... - Page 5 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 ≥31dB RF frequency 142.5~946 MHz, 1KHz step RF output level -14~ +6dBm, 0.1db step System RF mix in ATT...
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Page 6: Chapter 2 Safety Instruction And Installations
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 voltage must not exceed the recommended voltage, which otherwise may cause irreparable damage to the device and the invalidation of the warranty. - Page 7 5. Power supply connection: a) Connect the earth cable; b) Connect the power plug to the unit mains connector; c) Connect the power plug to the mains socket. Cascade Installation DHM-2057 unit has 1 TV signal to RF output encoded as DVB-T Digital TV signal. Several DHM-2057 units can be cascaded in order to increase the capacity.
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Page 8: Chapter 3 Operations And Management
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. - Page 9 Initializing Down Enter Menu Lock DVB-T 650.0MHz 1080i 6.93Mbps Main Menu Status Status Alarm Status Uptime Encoder Main Menu Inputface Encoder Video In Status Resolution Video Bitrate Audio Bitrate Main Menu Stream Stream TSID ONID Network ID Network Name Private data NIT insert NIT Ver Mode Service Name...
- Page 10 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.
- Page 11 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 default configuration.
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Page 12: Chapter 4 How To Upgrade
CHAPTER 4 How to Upgrade DHM-2057 encoder modulator is embedded with USB Port for upgrading. The supported file format is IMG. USB Port for Upgrade Upgrade steps: Insert USB device→Upgrade automatically(It will need 10-20 seconds to upgrade.) →Remove USB device→Power off→Power on. -
Page 13: Appendix
Appendix Australia Air Channels Australia Air Channels Frequency Frequency Start Center Start Center 599.5 606.5 48.5 613.5 59.5 620.5 66.5 627.5 88.5 634.5 97.5 641.5 104.5 648.5 140.5 655.5 177.5 662.5 184.5 669.5 191.5 676.5 198.5 683.5 205.5 690.5 212.5 697.5 219.5 704.5... - Page 14 6MHz Bandwidth 7MHz Bandwidth 8MHz Bandwidth Modulation Guard Interval Guard Interval Guard Interval Constellation 1/16 1/32 1/16 1/32 1/16 1/32 The weak ability of error-correcting and anti-interference in this area 6.03 6.03 5.80 6.45 6.83 7.03 6.64 7.37 7.81 8.04 QPSK 6.22 6.58...
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Page 15: Declaration Of Conformity
ΕΝ 61000-3-2:2006+A1:2009+A2:2009, EN61000-3-3:2008 EN:55024:2010 ΕΝ 50083-2:2006, IEC60728-2:2010 EN 61000-4-2:2009, EN61000-4-3:2006+A1:2008+A2:2010 EN 61000-4-4:2012, EN61000-4-5:2006 EN 61000-4-6:2009, EN61000-4-8:2010, EN 61000-4-11:2004 EN 60950-1:2006+A11:2009+A1:2010+A12:2011+AC:2011 Signed N.Gounalakis Place: Baarle-Nassau Managing Director Dated:16-02-2015 *QM-products is TM of Digital-Innovations B.V. *The Technical documentation is kept by the manufacturer...
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