User manual RADIOSHACK DX-440

[. . . ] In the longwave (LW) band, you can hear ship-to-shore calls, other marine and aeronautical services, and sometimes even hurricane reports. You can also tune to local broadcasts in the FM and medium-wave (MW) bands. (In the United States, we commonly call the MW band the AM band. ) In addition, you can connect a cassette recorder to the receiver's record line out and standby jacks so you can directly record your favorite programs live or at a preset time. Your receiver's features include: Digital Synthesized Radio -- ensures accurate, stable tuning. [. . . ] To change how quickly the frequencies change as you rotate the knob, repeatedly press STEP on the front of the receiver so the arrow on the right side of the display points to FAST or SLOW. 18 If you set STEP to FAST, the tuning increments are the same as when you press TUNING or . If you select SLOW, the tuning increments are smaller so you can fine tune the frequency. Band FM LW MW SW AM Mode set to USB or LSB Fast 0. 1 MHz 9 kHz 9/10 kHz 5 kHz 1 kHz Slow 0. 05 MHz 1 kHz 1 kHz 1 kHz 40 Hz 1. The frequency display disappears and FREQ flashes for about 30 seconds. Use the number keys and · to enter the frequency, then press ENTER . Notes: · If you wait more than 30 seconds to press a button, the previous frequency returns to the display. · If you make a mistake, press C (cancel) to erase the last digit, then enter the correct digit. Note: You can tune standard AM, upper sideband (USB), and lower sideband (LSB) frequencies. If you set STEP to STOP, turning MANUAL TUNING has no effect at all, so you cannot accidentally change the frequency. For information about locking the front panel buttons, see "Locking the Controls" on Page 15. Scan Tuning To automatically tune up or down to the next active frequency in the selected band, hold down TUNING or for about 1 second. The receiver scans up or down the selected band and tunes to the first frequency it finds with a strong signal. To scan for an SW (shortwave) frequency in one of the 14 meter bands, press SW, press the number button with the meter range you want to scan, then press TUNING or to scan the band. Direct Access Tuning Follow these steps if you know a station's frequency and want to directly tune to that station. 19 Notes: · When scanning, the receiver only searches for frequencies with strong signals. To search for stations with weaker signals, use one of the manual tuning methods. Many amateurs who operate SSB and transmit below 10 MHz generally use LSB (lower sideband), while amateur and commercial stations who transmit above 10 MHz generally use USB (upper sideband). Or, scan the band for SSB stations by slowly rotating MANUAL TUNING, tuning through the selected band until you hear an SSB station. Or, scan the band for USB or LSB stations by holding down TUNING or TUNING for about 2 seconds until you hear an USB or LSB station Note: SSB stations sound distorted when you tune to them in the normal SW band. To help you find SSB stations, watch for deflections on the signal strength indicator. Since SSB is transmitted with a suppressed carrier, the signal strength indicator will move more quickly when there is a transmission and more slowly during pauses in the transmission. When you have located an SSB station, press AM MODE to receive the transmission. Repeatedly press AM MODE to switch between USB or LSB transmissions (try LSB for frequencies below 10 MHz or USB for frequencies above 10 MHz). Set STEP to SLOW then readjust MANUAL TUNING for maximum intelligibility. USING RDS The receiver displays information about FM radio stations that transmit a Radio Data System (RDS) signal. When the receiver receives an RDS station, the station's call letters appear on the display. Also, if the station broadcasts CT (clock time) information, the receiver automatically corrects the displayed time. 25 Follow these steps to use RDS. Tune the receiver to an FM station that transmits RDS (and CT) information. [. . . ] 1. 711­29. 999 MHz SW Sub-Bands: 2. 300 ­ 2. 495 MHz (120 meters) 11. 600 ­ 12. 100 MHz (25 meters) 3. 200 ­ 3. 400 MHz (90 meters) 13. 500 ­ 13. 870 MHz (21 meters) 3. 900 ­ 4. 000 MHz (75 meters) 15. 100 ­ 15. 800 MHz (19 meters) 4. 750 ­ 5. 060 MHz (60 meters) 17. 480 ­ 17. 900 MHz (16 meters) 5. 900 ­ 6. 200 MHz (49 meters) 18. 900 ­ 19. 020 MHz (15 meters) 7. 100 ­ 7. 350 MHz (41 meters) 21. 450 ­ 21. 750 MHz (13 meters) 9. 400 ­ 9. 990 MHz (31 meters) 25. 600 ­ 26. 100 MHz (11 meters) Antenna: LW/MW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Built-In SW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Telescoping or Optional External FM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Telescoping Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]