ACOUSTIC SOLUTIONS SP110 Посібник - Сторінка 13

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d) The fourth option from the 'station order menu' is 'Tidy stations'. This allows the station list to be sorted, and those DAB stations within the list which

cannot be received within your area can be removed. From the 'station order menu', scroll through the sub menu options until 'Tidy stations' is displayed on

line 2. Press the function control knob to select this option.

2) Manual tune. It is possible to manually tune SP110 to a specific channel allowing this multiplex to be added to the service order list. This feature can be

used to assist positioning an antenna to gain optimum reception for a specific channel.To activate this mode, press the function key to display the menu

options on line 2. Scroll up/down until 'manual tune' is displayed. Press the function control knob to select this feature. Scroll up/down to choose a specific

channel and frequency from the list. When you have located the specific channel you require, press the function control knob to select this channel. On line 1

the signal strength bar graph will be displayed. As the antenna is moved this bar graph will alter, and when the minimum signal threshold is reached, the name

of the multiplex will be added to the station order list. Press the function control knob again to resume normal service.

3) DRC value. Radio stations generally use signal compression to reduce the gap between the high and low volumes of audio material, and to reduce the

difference in dynamics between music and microphone links. Some stations (such as Radio One) are heavily compressed as the music format is generally

popular music with the emphasis on a constantly high listening level. Other radio stations (such as Radio 4) use little or no compression and work on the

premise that its listeners require all the highs and lows in music to define detail. This type of radio station would probably be broadcasting music such as

classical which benefits from wide dynamics.

The SP110 is fitted with 3 levels of dynamic range control which apply compression to an audio signal in an attempt to reduce the difference in levels between

these stations. This means that when changing between radio stations, large volume changes can be avoided.

To activate this mode, press the function key to display the menu options on line 2. Scroll up/down until 'DRC value' is displayed. Press the function control

knob to select this feature.

Use the function control knob to scroll up and down through the 3 numerical values available.These are: 0- Which is zero compression (DRC off), 1/2 -

medium compression or 1 for maximum compression.

For listeners of mainly classical music or speech programs that contain wide dynamics to emphasise content, a DRC value of 0 is recommended. However

please be aware that other radio stations may be far louder, and care should be taken that amplification levels are not set too high when changing radio

stations.

4) SW (software) Version. This is provided as a reference when servicing may be necessary. It allows an engineer to determine a fault quicker if this

information is available.

To activate this mode, press the function key to display menu options on line 2. Scroll up/down until 'SW version' is displayed. Press the function control knob

to select this feature, the software version installed on this product will then be displayed.

5) Signal error rate. Because of the nature of digital radio, the SP110 will apply an amount of correction to an audio signal if parts of the transmission are

affected. The amount of signal correction can be shown as a numeric value between 0 (no correction) and 99 (maximum correction). This is obviously directly

proportional to the strength of signal in your area and the quality of your antenna.

To display the amount of signal error rate being applied, press the function key to display menu options on line 2. Scroll up/down until 'Signal error' is

displayed. Press the function control knob once to select this feature. A numerical value will be shown, and as a guide any value up to 50 is deemed

acceptable. For values above this please check the quality of antenna connections and positioning.