[\
AGC AUTO
CW

7 OPERATING AIDS

AT-300 EXTERNAL TUNER (OPTIONAL)

from another room, or, when coupled with other

Note:

commercially available products and where lawful, from

another city via a telephone connection.

◆The AT-300 must be connected while the transceiver power is switched OFF.

◆There is a 4 A fuse inside the TS-870S for the AT-300 Antenna Tuner.

1Press [ANT] to select Antenna 1.

2Press [THRU/AUTO].

•This places the tuner in the bypass state until tuning begins in the next step. If tuning fails, the tuner returns to the bypass state.

•[AT TUNE] is disabled if [THRU/AUTO] is not pressed.

3Press [AT TUNE].

•When tuning completes successfully, the AT TUNE light goes out, and “– AT – TX RX” lights.

•If tuning doesn’t finish within about 20 sec, an alarm sounds. You may stop the alarm and the tuning by pressing [AT TUNE]. The alarm can be either a triple beep or the Morse code “CHECK” depending on the Menu No. 37 (WARN. BP) setting.

•“RX” lights on the Display even if Menu No. 08 (RX AT) is OFF.

•Each time after changing frequency or after removing then restoring the power, you must press [AT TUNE] since there is no Preset data stored when using the external tuner.

COMPUTER TRANSCEIVER INTERFACE

The TS-870S interfaces easily with a computer. Computer interfaces on transceivers have encouraged the development of software applications by many companies.

Now available are electronic logbook applications that are partially self-completing. Information transferred between the transceiver and the computer is written into the logbook. These applications can automatically track awards and look up callbook information too.

Imagine using a mouse click to change your TS-870S to the correct DX frequency and mode of a DX station after the arrival of a report from your local DX packetcluster.

Efficient operating technique is the key to winning in pileups and is essential when operating contests.

Other applications can change your computer into an electronic console from which you can remotely control functions on the TS-870S without physically touching its Front Panel. This capability makes possible remote operation of your transceiver from across the room,

The list of applications is large and expanding, and is limited only by the imagination of software programmers. In short, the COM connector adds a new level of flexibility and opportunity to enjoy Amateur radio when a transceiver control application that supports the TS-870S and a computer are used.

Before using a computer for transceiver control, you should be aware of a few points. After you manually switch OFF the transceiver power, you can then switch ON the transceiver power using commands from the computer. Similarly, after switching OFF the power from the computer, it is then possible to switch ON the power from the Front Panel.

You can use the Front Panel controls while using computer control. Settings done from the Front Panel are effective immediately. After power is switched OFF from the computer, all values and settings per the Front Panel controls are restored.

COMMUNICATION PARAMETERS

In order to control the transceiver with your computer, you must first choose the communication parameters that you require. Configure your transceiver control application for 8 data bits and no parity. The communication speed and number of stop bits must match the settings in the TS-870S. The transceiver is configured via Menu No. 56 (COM.RATE). After changing Menu No. 56, the TS-870S must be switched OFF and then ON again for the new parameters to become effective. The defaults in the TS-870S are 9600 bps and 1 stop bit.

Menu No. 56

Baud Rate

Stop Bits

Setting

(bps)

 

12 1

1200

1

 

 

 

24 1

2400

1

 

 

 

48 1

4800

1

 

 

 

48 2

4800

2

 

 

 

96 1

9600

1

192 1

19200

1

384 1

38400

1

 

 

 

576 1

57600

1

 

 

 

Note:

◆Before connecting the TS-870S to a computer, switch OFF the power to the TS-870S and the computer.

◆To reliably use the 38400 or 57600 bps transfer rates, the serial port of your computer must support these high-speed communications parameters.

◆More information on controlling the TS-870S by a computer is included in Appendix D “COM CONNECTOR PROTOCOL” {page 83}.

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Kenwood TS-870S Operating Aids AT-300 External Tuner Optional, Communication Parameters, Menu No Baud Rate Stop Bits
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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.
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