RECEIVER ACCESSORIES

DSP NOTCH FILTER (DNF) (REQUIRES OPTIONAL DSP-2 UNIT)

The DSP system’s Notch Filter may be helpful in removing one or more offending carrier or heterodyne signals from the audio passband.

1.Press the [DSP] key momentarily. This instantly activates Multi Function Row “p” [DNR, DNF, DBF].

2.Press the [B](DNF) key to activate the Notch Filter. The “u” icon will appear at the left

side of the “DNF” indication, and the “ ” notation will appear at the top on the display. You will notice that the audio level of the carrier signal is now being reduced.

3.Press the [B](DNF) key once more to turn the Notch Filter off.

Do not activate this filter in the CW mode, as incoming CW signals will be notched out of the audio passband!

AM/FM TUNING DIAL OPERATION

In the AM and FM modes, the DIAL knob is locked out (via the setting of Menu Mode No- 004 [AM&FM DIAL]) so as to allow “channelized” tuning on these modes. To adjust the operating frequency, simply rotate the SELECT knob.

If you wish to enable Menu Mode No-004

the DIAL for tuning in the AM and FM modes, change the setting of [AM&FM DIAL]. See page 97 for details.

The “channelized” mode of tuning on AM and FM automatically rounds off the frequency to the next “logical” step when you rotate the SELECT knob one “click” in either direction. This eliminates the inconvenience of having to preset the frequency to

an “even” channel.

FT-857 Operating Manual

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Vertex Standard FT-857 manual AM/FM Tuning Dial Operation
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FT-857 specifications

The Vertex Standard FT-857 is a compact and versatile all-mode transceiver that has become popular among amateur radio operators since its introduction. With its ability to operate in VHF, UHF, and HF bands, the FT-857 caters to a diverse range of communication preferences and provides exceptional performance for both mobile and base station applications.

One of the key features of the FT-857 is its coverage of a broad frequency range, spanning from 160 meters to 2 meters and covering the 70 cm band. This wide frequency coverage allows amateur operators to communicate with fellow enthusiasts across various bands, ensuring versatility in operational environments. The FT-857 offers an output power of up to 100 watts on HF and 50 watts on VHF/UHF, providing sufficient power for effective communication, whether in local or distant contacts.

Another distinctive characteristic of the FT-857 is its all-mode capability. It supports various modes of operation, including SSB, CW, AM, and FM, making it suitable for different operating styles and preferences. The inclusion of advanced digital signal processing (DSP) technology enhances audio clarity and offers noise reduction features, which are crucial in crowded bands. This DSP capability also aids in improving signal quality and overall communication experience.

Portability is a significant advantage of the FT-857. Its compact size and lightweight design make it an excellent choice for field operations and portable setups. Additionally, the transceiver is well-equipped with features such as built-in memory channels, allowing users to save and quickly access frequently used frequencies. The FT-857 also includes a built-in automatic antenna tuner, which makes it easier for operators to set up and optimize their antenna configurations without requiring additional external devices.

The FT-857 is designed with user-friendly controls and a clear LCD display, enabling operators to quickly adjust settings and monitor communication details without confusion. The visibility of the display is especially vital for use in different lighting conditions, ensuring that users can operate efficiently whether in bright sunlight or low light conditions.

In summary, the Vertex Standard FT-857 is a highly capable, compact transceiver that offers an effective solution for amateur radio communication. With its all-band, all-mode capabilities, robust DSP technology, and user-friendly design, the FT-857 remains a popular choice for both enthusiasts and professionals alike, facilitating engaging communication experiences across multiple bands and modes.
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