2 INSTALLATION

Computer Interface (COM)

This connector allows you to directly connect a computer or dumb terminal by using an RS-232C cable terminated with a female 9-pin connector. No external hardware interface is required between your computer and the transceiver if your computer has an unused RS-232C serial communications port. See Appendix D on page 83 for information relating to this connector.

RS-232C serial port

 

TS-870S

Personal computer/

COM connector

 

dumb terminal

 

RTTY Equipment (RTTY and ACC 2)

To operate Frequency Shift Keyed RTTY, connect your RTTY equipment as shown below. Connect the RTTY key output from your RTTY equipment to RTTY, and connect the demodulation input of your RTTY equipment to ACC 2, Pin 3. By default, a short condition generates a space; an open generates a mark. However, this can be reversed via Menu settings.

Do not share a single power supply between the transceiver and the RTTY equipment. Keep as wide a separation as possible between the transceiver and the RTTY equipment as practical to reduce noise-pickup by the transceiver.

MCP

power supply

Demod input(RX)

 

MCP

RTTY

TS-870S

 

 

key

ACC 2

RTTY

Personal computer/

 

 

output

 

 

dumb terminal

 

 

 

 

(TX)

 

 

 

 

 

 

Linear Amplifier (REMOTE)

The REMOTE connector allows connection of an external transmit power amplifier. If using an amplifier, confirm that Menu No. 51 (LINEAR) is set to Ò1Ó (Fast) or Ò2Ó (Slow) {pages 24, 27}. This Menu item controls the linear amplifier TX/RX relay response time. Use the Fast setting unless you experience switching problems when using your amplifier for semi break-in operation.

Note: The TX/RX control method differs depending on external amplifier models. Some amplifiers enter the TX mode when the control terminal is grounded. For those amplifiers, connect pin 2 of the REMOTE connector to the GND terminal of the amplifier and connect pin 4 of the connector to the control terminal of the amplifier.

TS-870S

Linear amplifier

 

REMOTE connector

 

 

 

Pin

Function

 

 

 

No.

 

 

 

 

 

 

 

1

Speaker output

 

Black

 

2

Common terminal

 

Red

 

3

Standby; when grounded, the

 

 

AC LINE

 

 

 

transceiver enters TX mode.

 

 

 

 

 

RF OUTPUT

4 When connected with the common

 

 

 

 

Control relay

 

terminal, the amplifier enters TX mode.

 

R

 

5 When connected with the common

 

T

 

 

2

 

terminal, the amplifier enters RX mode.

 

4

5

 

 

 

 

 

1

3

6 ALC input from amplifier

 

6

7

 

GND

 

7

Approx. +12 V DC is output when in

 

REMOTE Connector

 

TX mode (10 mA max.).

 

 

 

 

(Rear Panel view)

 

 

5

Page 11
Image 11
Kenwood TS-870S Computer Interface COM, Rtty Equipment Rtty and ACC, Linear Amplifier Remote, Pin Function

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.