Radio Shack DX-398 Owner's Manual

25AM RF GAIN on the left side of the re-ceiver lets you tune a received signalfor the best SW reception. If the signalis weak, turn AM RF GAIN toward +. Ifthe sound is distorted, turn AM RF GAINtoward –.TUNING SSB STATIONSSSB (single sideband) is very popularamong amateur radio and business ra-dio users because of its superior signalquality. Many amateurs who operateSSB and transmit below 10 MHz gen-erally use LSB (lower sideband), whileamateur and commercial stations whotransmit above 10 MHz generally useUSB (upper sideband). Your receiverreceives both USB and LSB transmis-sions.Follow these steps to receive SSBstations.1. Select an SW band (see “Select-ing a Band” on Page 18).2. If you know the frequency of anSSB station, enter that frequency.Or, scan the band for SSB stationsby slowly rotating MANUAL TUN-ING, tuning through the selectedband until you hear an SSB sta-tion. Or, scan the band for USB orLSB stations by holding downTUNING or TUNING forabout 2 seconds until you hear anUSB or LSB stationNote: SSB stations sound dis-torted when you tune to them inthe normal SW band. To help youfind SSB stations, watch fordeflections on the signal strengthindicator. Since SSB is transmit-ted with a suppressed carrier, thesignal strength indicator will movemore quickly when there is atransmission and more slowly dur-ing pauses in the transmission.3. When you have located an SSBstation, press AM MODE to receivethe transmission. Repeatedlypress AM MODE to switch betweenUSB or LSB transmissions (tryLSB for frequencies below 10MHz or USB for frequenciesabove 10 MHz).4. Set STEP to SLOW then readjustMANUAL TUNING for maximumintelligibility.USING RDSThe receiver displays informationabout FM radio stations that transmit aRadio Data System (RDS) signal.When the receiver receives an RDSstation, the station’s call letters appearon the display. Also, if the stationbroadcasts CT (clock time) informa-tion, the receiver automatically cor-rects the displayed time.