Tips on radio waves

What is SSB (Single Side Band)?

SSB is very popular among ham and business radio transmissions, and is commonly used in many amateur bands because of its superiority in signal intelligibility. Its impressive signal intelligibility is achieved with minimum interferences when compared to DSB (Double Side Band) owing to its half bandwidth structure.

In general, SSB transmissions employ the USB (Upper Side Band) modulation, while amateur band transmissions below 10 MHz employ the LSB (Lower Side Band) modulation.

Conventional radios without a BFO (Beat Frequency Oscillator) circuit cannot receive SSB transmissions successfully. This unit can receive SSB transmissions successfully with the built-in BFO (Beat Frequency Oscillator) circuit.

Amplitude Carrier

LSB USB

Frequency

What is CW (Continuous Wave)?

CW is also popular among ham and business radio transmissions. Unlike other signals, the amplitude of a carrier is not modulated for CW transmissions. CW transmissions convey information by interrupting the carrier and use Morse code as a means of communication.

This unit can receive CW transmissions successfully with the built-in BFO (Beat Frequency Oscillator) circuit as beat sound only. To fully comprehend the information transmitted by CW transmissions, an understanding of the Morse code is prerequisite.

What is synchronous detection?

There are two underlying obstacles in optimum AM reception: distortions due to fading and interferences from adjacent broadcast stations.

The synchronous detection is effective in solving these obstacles.

Distortions due to fading are generally caused by over-modulation which occurs when a carrier component of the received signal is attenuated along the way. The synchronous detection circuit of this unit generates a pure carrier frequency with no level variation which is ideally synchronized with the original carrier to compensate for the attenuated carrier component, thus dramatically reducing distortion.

Likewise, AM (LW, MW, and SW) broadcast generally employs DSB (Double Side Band) signals for transmissions in which the modulated signals are transmitted using both the upper and lower side bands (USB and LSB). In most cases, one of the side bands is affected by interferences from adjacent broadcast stations (i.e., beats). The synchronous detection circuit of this unit extracts one of the two sides (USB or LSB) of the DSB (Double Side Band) signal which is free from interferences. This allows clear reception without the interferences from adjacent broadcast stations.

Interferences from adjacent

Carrier broadcast stations.

LSB

USB

This side is received only.

Additional Information

Additional Information

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Sony ICF-SW1000TS Tips on radio waves, 45EN, What is SSB Single Side Band?, What is CW Continuous Wave?
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ICF-SW1000TS, ICF-SW1000T specifications

The Sony ICF-SW1000T and its subsequent model, the ICF-SW1000TS, are portable shortwave radios that have become favorites among enthusiasts and casual users alike. Designed for those who seek to explore the vast world of amateur radio and shortwave broadcasts, these models compress advanced technologies into a compact and user-friendly format.

One of the standout features of the ICF-SW1000T is its exceptional sensitivity and selectivity. Equipped with a high-performance digital signal processing technology, it can pick up distant and weak signals with remarkable clarity. The radio covers an extensive frequency range from 150 kHz to 30 MHz, enabling access to a diverse array of international broadcasts, amateur radio stations, and utility signals. This makes it an ideal tool for individuals interested in global news, educational content, and cultural programming.

The ICF-SW1000T series is notable for its dual conversion superheterodyne receiver, which enhances the radio's ability to filter out unwanted signals and provide a clearer listening experience. Its advanced tuning system also offers both manual and preset options, allowing users to easily navigate across frequencies. With a large LCD display, users can effortlessly track frequency, signal strength, battery level, and time, ensuring a pleasurable user experience.

Another key characteristic of the ICF-SW1000T/TS is its comprehensive memory capacity. Users can store up to 100 stations, which makes switching between favorite broadcasts convenient and quick. Additionally, the built-in timer and alarm functions allow the radio to serve as a bedside companion, waking users to their favorite station.

The ICF-SW1000TS model further enhances usability with upgraded features such as the inclusion of a built-in rechargeable battery, an enhancement over its predecessor. The radio’s robust audio output ensures that users experience quality sound, making listening enjoyable even in noisy environments.

Finally, with its compact size, the ICF-SW1000T and ICF-SW1000TS are designed for portability, allowing users to carry them easily during travels or field operations. These models have solidified their reputation for durability, reliability, and performance, making them an excellent choice for anyone keen on exploring the spectrum of shortwave radio. Whether you are a seasoned operator or a curious novice, the Sony ICF-SW1000T and ICF-SW1000TS promise an enriching listening experience.
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