Оценок - 4, средний балл: 4.3
(
)
)
|
Фрагмент инструкции
They are needed to tune the Delta 150 to the required TV channels in your area. By pressing down one of the 'tune' buttons all the available TV channels from 21 to 69 are scanned in a period of approximately one minute, after which the cycle repeats itself. Most people will wish to assign BBC 1 to preset 1 on the Delta 150, BBC2 to preset 2, ITV to preset 3 and so on. To do this speedily when first setting up the Delta 150 proceed as follows: Use the set up procedure described on page 7 to tune your TV into the remodulated output of the Delta 150. Then use the TV normally to check the programme content of a desired station (e.g. Channel 4). Now use the Delta 150's channel buttons or remote control to select preset number 4, shown by the display on the front panel. Switch the TV back to channel 5 (displaying the Delta 150's remodulated output), and hold down one of the tune buttons on the Delta 150 until the same programme appears on the TV screen. When the picture is tuned in as clearly as possible, press the 'store' button on the Delta 150. Preset number 4 on the Delta 150 is now assigned to your local Channel 4 transmitter. Repeat the procedure for as many other channels as you wish, up to 8. Please note that the Delta 150 employs a powerful Automatic Frequency Control (AFC). This circuitry is used to compensate for minor tuning drift with time and temperature. The AFC function is defeated during tuning and remains defeated for approximately 1 second after a channel has been tuned. The effects of this are noticeable as the Delta 150 will 'pull in' a slightly mistuned programme back into the optimum position. This means that it is possible to obtain a good picture on a programme that is badly tuned in. When tuning the programme in, care should be taken to ensure that the initial effects of the AFC are minimised: this is done by tuning the programme in and waiting for about I second for the AFC function to be enabled. If the picture does not change when the AFC is enabled, then the programme will be close to its optimum tuning point. To achieve precise tuning you may find it helpful to use two fingers to 'rock' between the tune up and down buttons. If this is done quickly then the AFC remains disabled, making it easy to see when optimum tuning (i.e. the best picture) has been achieved. Delta 150 N1 CAM stereo TV tuner handbook Stereo LED This LED (light emitting diode) will glow green when the stereo flag is switched on at the transmitter You may find that the stereo LED will be illuminated even when a mono broadcast is transmitted. This is not indicative of a fault, merely of the practice of the broadcasting station. L1, L2 Dual language mode LEDs. The LI LED will glow green when a dual language programme is transmitted. English is always transmitted as the main language (LI), and the second language is transmitted as L2. The English language will be received automatically - there is no need to select it. However, if you wish to receive the second language, simply press the NICAM button once and the second language will be received instead. The L2 LED will now glow green. Pressing the NIC AM button a second time will return the programme to LI. When a dual language programme is transmitted, the stereo LED is not illuminated. Note When a dual language programme is transmitted, both languages are in mono - although the chosen language will automatically be heard through both loudspeakers of your TV or hi fi system. It is not possible to receive English on the left channel and the second language on the right channel simultaneously. Channel buttons These two buttons select any of the 8 preset channels by pressing the up button to change sequentially from channels 1 to 8, and the down button to change sequentially from channels 8 to 1. 9 NICAM button and LED The NICAM LED uses a 'traffic light'sequence to indicate the status of the sound track of the programme being transmitted. If the LED glows red, only a mono FM programme is being transmitted. This is automatically routed equally to both the left and right audio outputs. If the LED glows amber, a NICAM encoded programme is being transmitted, but the tuner is switched to mono FM reception. Press the NICAM button once and the LED will now glow green, to indicate that the NICAM version of the transmission is being routed to the audio outputs. Press the NIC AM button again to revert to the mono FM mode. Only if the LED glows green, are you receiving and listening to a NICAM broadcast. Tuning tip When tuning in the channels of your Delta 150, please observe the status of the NICAM LED. If it glows amber, press the NICAM button before pressing the store button, so that the NICAM LED now glows green. This will ensure that every time this channel is selected, it will be automatically received in NICAM (when transmitted). Similarly, if a programme, which was originally available only in mono FM (red LED), is now available in NICAM, ...