AF Function

The AF (Alternative Frequencies search) function is used to search for other frequencies in the same network as the currently tuned station. It automatically retunes the receiver to another frequency in the network which is broadcasting a stronger signal when there are problems with reception of the currently tuned station or better reception is possible on

a different frequency.

Note:

AF tunes the receiver only to RDS stations when you use Seek tuning or BSM Auto Memory with the “AF ” indicator ON.

When you recall a preset station, the tuner may update the preset station with a new frequency from the station’s AF list. (This is only available when using presets on the FM1 band.) No preset number appears on the display if the RDS data for the station received differs from that for the originally stored station.

Sound may be temporarily interrupted by another program during an AF frequency search.

When the tuner is tuned to a non-RDS station, the “AF ” indicator flashes.

AF can be switched ON or OFF independently for each FM band.

Activating/Deactivating the AF Function

AF is set to ON by default.

• Turn AF to OFF.

Hold for 2 seconds

“AF” disappears

To turn AF back ON, repeat the preceding operation.

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Pioneer KEH-3900R, KEH-3930R operation manual Activating/Deactivating the AF Function, Turn AF to OFF

KEH-3900R, KEH-3930R specifications

The Pioneer KEH-3900R and KEH-3930R are classic car audio receivers that reflect Pioneer’s commitment to sound quality and user-friendly design. Known for their sophisticated technology and feature-rich layouts, these models have gained popularity among car enthusiasts and everyday users alike.

One of the standout features of the KEH-3900R and KEH-3930R is their high-quality audio performance. Both models support a wide range of formats, including CD, radio, and cassette playback. They feature an integrated FM/AM tuner with a strong reception capability that allows drivers to effortlessly tune into their favorite stations while on the road. The dual-band radio ensures a varied selection of local and regional channels.

Sound customization is a vital component of both receivers. The KEH-3900R and KEH-3930R are equipped with a 3-band equalizer, enabling users to tailor the audio output to their listening preferences. The bass boost feature further enhances the low-end frequencies, providing a richer listening experience, especially for bass-heavy music genres. Additionally, the built-in high-pass and low-pass filters help users manage speaker performance, resulting in clearer sounds and minimized distortion.

Connectivity is another area where these models shine. The KEH-3930R features an auxiliary input, allowing users to connect external devices such as smartphones or portable media players. This compatibility broadens the audio source options, making it easier to enjoy various playlists and audio content on the go. The KEH-3900R may not have this direct input but can be paired with aftermarket accessories to achieve similar functionality.

Both models boast user-friendly interfaces with intuitive controls. The large LCD display features an easy-to-read design, showing relevant information such as song title, artist, and radio frequencies. Backlit buttons enhance visibility at night, ensuring smooth navigation without distraction.

Durability and reliability are key characteristics of the KEH-3900R and KEH-3930R. Built to withstand the rigors of daily use, these receivers come with a robust casing designed to resist wear and tear. Their straightforward installation process makes them accessible for both professionals and DIY enthusiasts.

In summary, the Pioneer KEH-3900R and KEH-3930R stand out in the car audio market for their excellent sound quality, customizable audio settings, and robust design. Whether for casual listening or serious audio exploration, these receivers offer features that cater to the needs of diverse drivers, making them a solid choice for car audio pleasure.