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Vertex Standard FT-857 manual Weatherfax Monitoring

Models: FT-857

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TRANSMITTER OPERATION

PACKET (1200/9600 BPS FM) OPERATION

ating on 1200 bps, try now to connect to another station or node; you may well find that the drive level needs no further adjustment. If, however, you are having trouble connecting due to insufficient or excessive drive from the TNC to the FT-857, use Menu Mode No-071[PKT 1200] (for 1200 bps Packet) or No-072[PKT 9600] (for 9600 bps Packet) to set the drive. Use your terminal software’s “test” protocol to send out test tones, and adjust the deviation by rotating the DIAL knob, which will vary the data input level to the FT-857’s modulator. Remember to press and hold in the [FUNC] key for one second when adjust- ments are completed, so as to save the new setting for Menu Mode No-071[PKT 1200] or No-072[PKT 9600].

The 9600 bps Packet deviation setting is very critical to successful operation, and it can only be accomplished using a calibrated deviation meter; the optimum set- ting is usually ±2.75 kHz (±0.25 kHz). For 1200 bps, the optimum level is much less

critical, with the optimum deviation being between ±2.5 kHz and ±3.5 kHz.

WEATHERFAX MONITORING

Monitoring of HF WeatherFax broadcasts is easily accomplished using the FT-857.

Before proceeding, be certain that the WeatherFax demodulator is

properly connected to Pins 5 and 2 of the rear panel DATA jack.

DATA OUT

GND

 

1. Set the transceiver to the VFO mode, and set the operating mode

DATA

to “DIG,” setting Menu Mode No-038 [DIG MODE] to “PSK31-U,” as described previ- ously.

2.Now, select the operating frequency of the station transmitting the WeatherFax broad- cast. Note that, in the USB mode, the frequency you should program onto the display is typically 1.90 kHz below the station’s “assigned” frequency. Thus for a WeatherFax station assigned to 8.682.0 MHz, tune to 8.680.1 MHz.

3.When the WeatherFax broadcast begins, no further operator intervention should be needed from the transceiver standpoint. The audio level from the DATA jack on the rear of the transceiver is fixed, and cannot be adjusted.

4.Fine adjustments in the gray-scale and the frame alignment are accomplished using the computer and software connected to your WeatherFax demodulator.

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FT-857 Operating Manual

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Page 68
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Vertex Standard FT-857 manual Weatherfax Monitoring
Page 67 Page 69

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.