TRANSMITTER OPERATION

TIME-OUT TIMER

Most often used on FM, the transmitter’s Time-Out Timer (TOT) feature disables the trans- mitter after a user-defined period of transmission. This feature may be useful in preventing a “stuck microphone” (accidental closure of the PTT switch) from causing interference to other users, and it will also force you to keep your transmissions short, thereby conserving battery power.

To activate the Time-Out Timer:

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-084[TOT TIME].

3.The default setting for this feature is “OFF.” Rotate the DIAL knob to set a new time-out setting (from 1 minute to 20 minutes).

4.When you have made your selection, press and hold in the [FUNC] key for one second to save the new setting and exit to normal operation.

SPLIT FREQUENCY OPERATION

This transceiver provides convenient split-frequency operation, using VFO-A and VFO-B, for DX working and other operating situations requiring unique split frequency pairs.

The example below will describe a typical split-frequency DX situation on the 20-meter band, with a DX station transmitting on 14.025 MHz, listening 10 kHz higher in the band.

1.Set VFO-A to 14.035.00 MHz CW (DX station’s listening frequency).

2.Press the [FUNC] key momentarily, then rotate the SELECT knob, as needed, until Multi Function Row “a” [A/B, A=B, SPL] appears on the display.

3.Press the [B](A=B) key momentarily (to set VFOs A and B to 14.035.00 MHz).

4.Press the [A](A/B) key momentarily to select VFO-B, then tune the VFO-B frequency to 14.025.00 MHz (DX station’s transmitting frequency).

5.Press the [C](SPL) key momentarily. The transceiver will now transmit using the VFO- A frequency, and will receive using the VFO-B frequency.

The “u” icon will appear at the left side of the “SPL” indication, and the “SPL” icon will appear at the upper left corner of the display.

6.To listen to the pile-up calling the DX station (so as to align your frequency more closely to that of the station being worked by the DX), press the [A](A/B) key to reverse the VFOs. You will now be tuning in the vicinity of 14.035 MHz, and you can zero in on the DX station’s listening frequency by tuning in on the station in QSO with the DX. Press the [A](A/B) key again to return to reception on the DX station’s frequency.

7.Press the [C](SPL) key once more to cancel split operation; the “u” icon and “SPL” icon will disappear from the display.

FT-857 Operating Manual

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Vertex Standard FT-857 manual TIME-OUT Timer, Split Frequency 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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