Operating Aids, VOX VOICE-OPERATED Transmit

7 OPERATING AIDS

TRANSMITTING

VOX (VOICE-OPERATED TRANSMIT)

VOX eliminates the necessity of manually switching to the transmit mode each time that you want to transmit. The transceiver automatically switches to transmit when the VOX circuitry senses that you have begun speaking into the microphone.

When using VOX, get into the habit of pausing between thoughts to let the transceiver drop back to receive briefly. You will then hear if anybody wants to interrupt, plus you will have a short period to gather your thoughts before speaking again. Your listener will appreciate your consideration as well as respect your more articulate conversation.

Press [VOX] to toggle the VOX function ON or OFF.

•“VOX” lights when the function is ON.

VOX

AGC AUTO

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■Delay Time Adjustment

1 Select a voice mode, switch ON the VOX function, and begin speaking into your microphone using your normal level of voice.

2Adjust the DELAY control so that the transceiver changes back to receive a brief time after you stop talking.

•The DELAY control has a range from

150 ~ 2700 ms. Each step equals 10.6 ms.

Note: Setting the delay time by computer overrides any setting of the DELAY control. The control then has no effect. To restore functionality to the DELAY control, turn the control. The newly selected setting becomes effective.

TRANSMIT INHIBIT

Transmit Inhibit prevents the transceiver from being placed in the transmit mode. No signals can be transmitted if this function is ON. When the transceiver is inhibited from transmitting, the graduations on the PWR meter go out as a visual reminder.

•TX Inhibit OFF: Transmissions are possible.

•TX Inhibit ON: Transmissions are not possible.

Switch the function ON or OFF via Menu No. 27 (TX INH). The default is OFF.

■Microphone Input Level Adjustment

To enjoy the VOX mode, take time to set the gain of the VOX circuit to the correct level.

1Select a voice mode, switch ON the VOX function, and begin speaking into your microphone using your normal level of voice.

2Access Menu No. 28 (VOX.GAIN), then select different settings (default is 4) until the transceiver reliably switches to transmit each time you speak.

•The best setting will allow the transceiver to switch between receive and transmit; however, background noises near your operating position should not falsely switch the transceiver.

•This Menu item is configurable even if the VOX function is OFF or while you are transmitting.

Note: This transceiver does not have an ANTI-VOX control. DSP is able to automatically lower the input sensitivity for received audio that is output from the speaker.

XIT (TRANSMIT INCREMENTAL TUNING)

Similar to RIT, XIT provides the ability to change your transmit frequency by ±9.99 kHz in steps of 10 Hz without changing your receive frequency. If the Fine Tuning ([FINE]) function is ON, the step size is 1 Hz.

1Press [XIT].

• “XIT” and the XIT frequency display appear.

AGC AUTO	TONE
	XIT

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2Press [CLEAR] to reset, if required, the XIT offset to 0.

3Turn the RIT/XIT control to change your transmit frequency.

AGC AUTO			TONE
			XIT

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4To cancel the XIT function, press [XIT].

Note: The frequency shift set by the RIT/XIT control is also used by the RIT function. Therefore, changing or clearing the XIT frequency also affects the RIT frequency.

TS-870S specifications

The Kenwood TS-870S is a distinguished transceiver that stands out in the world of amateur radio, particularly for enthusiasts who seek a blend of advanced technology and user-friendly features. Introduced in the early 1990s, this HF transceiver quickly gained a reputation for its exceptional performance, versatility, and reliability, making it a favorite among operators worldwide.

One of the most noteworthy features of the TS-870S is its direct-sampling technology, which allows for superior signal fidelity and processing. This technology enables the transceiver to operate across a range of 160 meters to 10 meters, catering to both casual and serious operators. Its high-performance 16-bit digital signal processing (DSP) facilitates effective noise reduction and filtering capabilities, enhancing the overall clarity during transmission and reception.

In terms of power, the TS-870S boasts an output of 100 watts, providing ample power for various communication needs. The transceiver is equipped with an automatic antenna tuner, which simplifies the task of matching the antenna to the operating frequency, ensuring optimal performance without the hassle of manual adjustments.

Another significant aspect of the Kenwood TS-870S is its user interface, featuring a large, easy-to-read display, and a logically arranged control layout. This makes it accessible for both novice and experienced operators. The built-in memories allow for quick storage and access to favorite frequencies and settings, enhancing operational efficiency.

The Kenwood TS-870S also includes various advanced features such as an optional 2.4 kHz and 6 kHz roofing filter which provides improved performance in crowded band conditions. The receiver's dual VFOs (Variable Frequency Oscillators) enable simultaneous monitoring of two frequencies, which is particularly useful for operators who need to keep track of multiple signals or engage in cross-band communication.

Apart from its technical specifications, the TS-870S is constructed with durability in mind, ensuring that it can withstand the rigors of frequent use. It supports various operating modes, including SSB, CW, AM, and FM, making it a versatile choice for diverse amateur radio activities.

In conclusion, the Kenwood TS-870S combines advanced technology with user-friendly characteristics, offering amateur radio operators an exceptional tool for communication. With its innovative features, robust performance, and flexibility, it continues to be a respected choice among radio enthusiasts, solidifying its legacy in the realm of amateur radio.