QUADRANT DVB-T Modulator USER GUIDE. Quadrant DVB A N T E N N A I R. Copyright 2012 Antennair Limited, Neo House, Shaw Road, OLDHAM OL1 4AW. Issue 1.

Transcription

1 QUADRANT DVB-T Modulator USER GUIDE Quadrant DVB A N T E N N A I R Copyright 2012 Antennair Limited, Neo House, Shaw Road, OLDHAM OL1 4AW Issue 1.1

2 This user guide contains basic instructions for installation and operation of both Single and Dual Channel QUADRANT Modulators. Please read through this document to determine how best to deploy the unit (location, connections & settings) to suit your intended application. Hardware Installation The unit should be located indoors, in a reasonably well ventilated location and away from direct sources of heat such as radiators, direct sunlight, or excessively hot electronic equipment. The rear of a dual unit is arranged like this: Connections are arranged in two horizontal rows. The lower row is always present on both Single and Dual units, whereas the upper row is only present on Dual units. On the bottom row, connections from left to right are as follows: 1. F Connector - UHF Output into 75 Ohms coaxial cable. 2. Barrel ROKA Plug - 12V 1A DC PSU Input, centre Positive (+). 3. Yellow PHONO socket - Composite Video Input, PAL/ NTSC 75 Ohms 4. Mini DIN Socket - S-Video Input, PAL/ NTSC 75 Ohms 5. White PHONO Socket - Audio Channel LEFT input 10K Ohms 6. Red PHONO Socket - Audio Channel RIGHT input 10K Ohms 7. RJ45 Socket - Serial Connection to host - reserved. N.B. The group AV1 are the primary input feed. On the top row from left to right connections are the secondary feed AV2 as follows: 1. Yellow PHONO socket - Composite Video Input, PAL/ NTSC 75 Ohms 2. Mini DIN Socket - S-Video Input, PAL/ NTSC 75 Ohms 3. White PHONO Socket - Audio Channel LEFT input 10K Ohms 4. Red PHONO Socket - Audio Channel RIGHT input 10K Ohms

3 In the majority of cases, the only connections used will be DC Power, UHF RF output, and Video and Sound inputs. You may select whether to use S Video or PHONO video inputs in the menu options (see later). If a Stereo sound source is not available, using just one of the two inputs for a Mono source will automatically feed audio to both LEFT and RIGHT channels of the modulated output, but with reduced input impedance. For best picture quality choose an S- Video picture source as opposed to composite video where possible. In all cases use good quality screened leads. Make all connections before powering up the unit. The RF Output can be fed directly to a TV (or group of TV s) aerial socket, with appropriate distribution amplifiers as required, or mixed with off-air RF so as to allow the TV sets to tune in to broadcast DVB channels as well as the modulator output. In the latter case you will need to choose a free TV Channel that doesn t clash with local broadcast channels. You will also have to choose a logical channel number which does not clash with any locally available broadcast programs. The TV set(s) will then find and add the modulator output to its list of available viewing, as if it were just one more off-air broadcast. If for any reason the TV doesn t find the signal, do a manual scan of the RF channel used. If you are mixing the RF out from two or more units together, possibly with an offair RF feed as well, you need to set the NETWORK ID of all the boxes to something different. So for example leave the first unit s ID alone, and increment the subsequent ones from the one previous. This is so the receiving TV s know how to deal with the logical channel numbers (LCN s). i.e. the numbers of the programs that the TV will when it searches for new content. So just to make sure, no two boxes network ID should be the same or the same as any broadcast network ID, to avoid a clash. Menu Navigation The menu system allows the user to set up various operating details such as Channel Number, (E21 to E69) Logical Channel Number (e.g. 92), Time and Date, Video source type and Channel Name e.g. Hotel TV, and so on. This is described a little later on. You can set up these parameters off site if required, as no video or audio input is needed to do this; you will get a blue screen with no sound if you tune in to the modulator when nothing is fed in, but the logical channel number and name will still appear. The menu is navigated by a simple 5-button arrangement, whilst observing the LCD at the left of the front panel. The centre key is the OK or Enter function. The left, right, up and down buttons will be referred to as <, >, ^ & v respectively.

4 The menu structure is shown below. Continued...

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6 Note that although there are lots of settings available, you mostly only need a few if any changing, as everything is pre-loaded in the factory to suit most applications! When you first power up the unit, the RED LED will be illuminated and there will be a delay of 10 seconds or so before any display appears. This is normal. After the internal firmware has loaded you should see the default display: Antennair DVB-T Ch:50 [706MHz]---> N.B. The final part of this screen shows whether you have a single or dual channel unit. Single channel units show a single arrow in the middle of the char on the display, the dual channel unit will show two arrows (one above the other) in the char on the display. This means the unit is up and running, in this case on TV Channel 50, frequency 706 MHz. The GREEN LED will be illuminated. Note : the LCD font depends on the panel used, and so may vary somewhat. To change any parameter, press the OK button, which will invoke the menu system as per previous diagram. The message ** EXIT SETUP ** will appear, which invites you to cancel, either by doing nothing (timeout 20 seconds) or by pressing the OK button once more. In this case the message Exited Setup will be displayed momentarily before returning to the default display. Let s assume you want to change the default RF channel number from 50 to 36. Press the OK button then press the v (= down!) button until you get MODULATOR Then press the OK button again which will take you to the menu section dealing with modulator parameters. You should see RF CHANNEL 50 [0706 MHz]

7 Press the OK button once more; the 50 will flash, inviting you to alter it. Use the ^ or v buttons to increment or decrement the channel number to the one you want to use, and then press the OK button followed by the < button to take you back to the Modulator menu, and < once more then OK to return to the default display, which will now show the new RF channel of your choice. The above example demonstrates the way the menu system can be navigated. Up and Down buttons change parameters, and Left and Right buttons select various options within sub-menus, with the OK button confirming actions. After using it a few times you should find it quite straightforward. Don t be put off by all the various modulator and encoder options, which are provided for specialist users; the factory defaults will provide a viable system out of the box. Furthermore, if you suspect that you have made some unwanted changes but aren t sure what they were, you have the option of returning the unit to factory defaults. This will undo all the changes you have made, so use with caution. To invoke factory reset, switch off power to the unit. Now press and hold the ^ and v buttons at once, while re-applying power. Keep these two buttons pressed until the default display shows, then release them. You should see the message then eventually Defaults Loaded Antennair DVB-T Ch:50 [706MHz]---> N.B. For Dual units, there will be TWO arrows shown! General Notes on Menu Options and Useage Your basic task when doing an installation is to determine a free RF channel for the modulator, choose the 'Logical Channel Number' (or numbers if a dual unit) you want the TV to put the signals on, (i.e. the 'digital channels' you select on your TV(s) when changing programmes) and then just make sure if you have more than one unit on your system that the network ID's are all different. This might seem obvious, but choose an RF channel that is away from local TV channels, and avoids the RF output channel of e.g. Sky boxes or VCR's etc. that might be present in legacy installations.

8 Next, choose your channel numbers (LCN) so they don't clash with locally broadcast LCN's. You can usually see what ones are used by channel hopping on your TV! If in doubt, choose high numbers that are very likely to be to be spare like 808,809 or some such. Under GENERAL, set the unit's time to the time of day in GMT, and date to the present date at that time, if required. Under INPUT, choose the VIDEO SOURCE i.e. S Video or PHONO, for each AV input. The Quadrant cannot auto detect which input to use. Also select whether you have a PAL or NTSC source (the Quadrant cannot auto detect TV Standards, but it can have different standards set on the two AV inputs, which is rather neat). For ASPECT RATIO the usual (default) is AUTO. This will read the wide screen signalling information (WSS, where present) in the video input (e.g. a SKY box has it) and set up the picture accordingly. If you source has no WSS present (half a line of dashes at the picture top left) then set manually to 4:3 or 16:9 as required. Under MODULATOR, set the required RF output channel, but leave the RF level setting alone unless for some reason it overloads any distribution amplifier you may be using. (Unlikely). Leave all ENCODER settings alone, unless for any reason you have a picture which is noisy at source in which case you can try lower VIDEO FILTER settings, which affect picture sharpness. Under NAMES, choose and enter the displayed CHANNEL NAME for each video input (AV1, AV2) and if required the common NETWORK NAME. If more than one unit is deployed use different network names. Under SERVICE, only edit the LCN as described above, for each AV input. (Just to re-cap, these are the channel numbers as shown on a DVB TV). Everything else you can ignore. Under NETWORK make sure second and subsequent units (if used) all have different ones, and none the same as any broadcast networks. STATUS is an engineering readout of system performance and can be ignored. LED Indicators RED LED is Power ON. GREEN LED is STATUS (presently transmitting). YELLOW is reserved for factory use presently. E & O.E.