TRANSMITTER OPERATION

DIGITAL MODE OPERATION (SSB-BASED AFSK)

The FT-857provides extensive capability for digital mode operation on the HF, VHF, and UHF bands. The use of AFSK (Audio Frequency-Shifted Keying) configurations allows a wide variety of different communication modes to be utilized. The Menu provides for spe- cific digital mode selections, which include custom BFO offsets to optimize the receive and transmit passbands for the mode selected.

Before beginning Digital operation, you need to define which Digital mode will be utilized. To do this, use Menu #38 as follows (in this example, we will set up RTTY as the Digital mode):

1.Press and hold in the [FUNC] key for one second to enter the Menu mode.

2.Rotate 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.

3.Rotate the SELECT knob to select Menu Mode No-038[DIG MODE].

4.Rotate the DIAL knob to select “RTTY-L” or “RTTY-U” (see discussion below).

5.Press and hold in the [FUNC] key for one second to save the new setting and exit.

Use this basic technique to set up any digital mode.

RTTY (Radio TeleType) Operation

The “RTTY” mode on the FT-857is available in either LSB-side or USB-side BFO injec- tion. Long-standing Amateur practice calls for the use of LSB-side injection, but some ap- plications require that you use USB-side injection.

1.Connect your TNC (Terminal Node Controller) or termi- nal modem to the FT-857’s rear-panel DATA jack, per the illustration. Be sure to use the “TX AUDIO” line, not an “FSK” line, for the transmit data connection to the

FT-857.

2.Press the [MODE(t)] or [MODE(u)] key, as needed, to select the DIG mode (the “DIG” icon will appear on the display). You should now be able to tune around the band, and any RTTY signals heard should be capable of being decoded.

3.If the optional YF-122C500 Hz filter or YF-122CN300 Hz filter has been installed, it may be used for RTTY work. Recall Multi Function Row “n” [CFIL, – – –,– – –], then press the [B](–) or [C](–) key to engage the narrow filter.

4.To set up the transmit side, be sure that the Meter is set to

AFSK

AF IN OUT PTT

GND

DATA OUT

DATAIN

PTT

FT-857 Operating Manual

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Vertex Standard FT-857 manual Rtty Radio TeleType Operation, Digital Mode Operation SSB-BASED Afsk
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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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