OPERATION

ADJUSTING THE RF GAIN AND SQUELCH The SQL/RF Gain control is configured differently, SQL/RF depending on the country to which the FT-857has been

exported. In the U.S. version, the default function of this control is “RF Gain.” The configuration of the SQL/RF Gain control is set via Menu Mode No-080[SQL/RF GAIN]; see page 110 for details.

If your transceiver is configured for “RF Gain” use, rotating this control fully clockwise in the SSB/CW/Digital modes will provide best sensitivity. To reduce the receiver’s RF Gain somewhat, rotate this control counter-clockwise slightly. You will observe an increasing number of bars on the S-meter as you rotate the RF Gain control counter-clockwise; this indicates increasing AGC voltage, which is causing the front-end gain to be reduced. In the FM and Packet modes, this control will automatically be set to “Squelch,” even though the setting of Menu Mode No-080[SQL/RF GAIN] is “RF Gain.”

If this control is configured for “SQL” operation, the FT-857’s RF Gain will be set for maximum sensitivity in all modes, and the SQL/RF Gain control will function solely as a Squelch control. In this case, rotate the SQL/RF Gain control to the point where the back- ground noise is just silenced; this will provide the best sensitivity to weak signals, while keeping the receiver quiet when no signal is received. The LED just above the Main DIAL will glow Green when the squelch is opened by an incoming signal or noise.

 

SETTING THE OPERATING FREQUENCY

 

1.

In the “SSB/CW/DIG” modes, rotate the DIAL knob to set the frequency. Clockwise

 

rotation of the DIAL increases the operating fre-

 

 

 

quency.

 

 

2.

In the “AM/FM/PKT” modes, rotate the SELECT

 

 

 

knob to set the frequency. Clockwise rotation of

 

 

 

the SELECT knob increases the operating fre-

SELECT

DIAL

 

quency.

3.You may also use the SELECT knob to adjust the operating frequency in the “SSB/CW/ DIG” modes. The SELECT knob provides faster tuning, ideal for making quick changes in frequency when you want to move across the band in a hurry. You can then use the DIAL knob to make fine frequency adjustments.

The synthesizer steps for the SELECT knob may be adjusted independently by mode. Use Menu Mode No-006[AM STEP] for AM, No-052[FM STEP] for FM, and No-082[SSB STEP] for SSB/CW/DIG. See pages 97, 105, and 110 for details.

If you press the SELECT knob momentarily, then rotate the SELECT knob, you can now

36

FT-857 Operating Manual

Page 37 Page 39
Page 38
Image 38
Vertex Standard FT-857 manual Setting the Operating Frequency
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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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