TRANSMITTER OPERATION

SSB/AM TRANSMISSION

VOX Operation

The VOX system provides automatic transmit/receive switching based on voice input to the microphone. With the VOX system enabled, you do not need to press the PTT switch in order to transmit.

1.Press the [FUNC] key momentarily, then rotate the SELECT knob, as needed, until Multi Function Row “d” [RPT, REV, VOX] appears on the display.

2.Press the [C](VOX) key to activate the VOX circuitry. The “u” icon will appear at the left side of the “VOX” notation, and the “” icon will appear on the display.

3.Without pressing the PTT switch, speak into the microphone in a normal voice level. When you start speaking, the transmitter should be activated automatically. When you finish speaking, the transceiver should return to the receive mode (after a short delay).

4.To cancel VOX and return to PTT operation, again press the [C](VOX) key. The “u” icon and “” icon will disappear, signifying that the VOX system has been turned off.

5.The VOX Gain may be adjusted, so as to prevent accidental transmitter activation in a noisy environment. To adjust the VOX Gain:

ŸWhile still in Multi Function Row “d” [RPT, REV, VOX], press and hold in the [C](VOX) key for one second. This is a “hot key” feature which will instantly recall Menu Mode No-088[VOX GAIN].

ŸWhile speaking into the microphone, rotate the DIAL to the point where the transmit- ter is quickly activated by your voice, without causing background noise to activate the transmitter.

ŸWhen you have selected the optimum setting, press and hold in the [FUNC] key for one second to save the new settings and return to normal operation.

6.The “Hang-Time” of the VOX system (the transmit-receive delay after the cessation of speech) may also be adjusted via the Menu. The default delay is 500 ms. To set a differ- ent delay time:

ŸPress and hold in the [FUNC] key for one second to activate the Menu mode.

ŸRotate the SELECT knob to recall Menu Mode No-001[EXT MENU], then rotate the DIAL to change the setting to “ON” to enable the extended Menu Mode.

ŸRotate the SELECT knob to select Menu Mode No-087[VOX DELAY].

ŸRotate the DIAL while saying a brief syllable like “Ah” and listening to the hang time, so as to set the desired delay.

ŸWhen your adjustments are complete, press and hold in the [FUNC] key for one second to save the new setting and return to normal operation.

The delay time for return to the receive mode is set independently on CW and voice modes; for CW, use Menu Mode No-024 [CW DELAY] (see next chapter).

FT-857 Operating Manual

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Vertex Standard FT-857 manual VOX 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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