12 MAINTENANCE

The transceiver has low

1

The MIC gain control and/or CAR

1

Increase the MIC gain control and/or

29, 30,

transmit power.

 

control is set too low.

 

CAR control clockwise depending on

38, 40,

 

 

 

 

the mode being used. Review the

41

 

 

 

 

appropriate section of the

 

 

 

 

 

"COMMUNICATING" chapter for the

 

 

 

 

 

mode being used.

 

 

2

Poor antenna system connections are

2

Check antenna connections. Confirm

49

 

 

causing high SWR.

 

that the antenna tuner is reporting a low

 

 

 

 

 

SWR.

 

 

 

 

 

VOX does not operate.

The VOX gain is set too low.

Increase Menu No. 28 (VOX.GAIN).

45

Linear amplifier does not

1

The LINEAR Menu setting is incorrect.

1

Set Menu No. 51 (LINEAR) according to

5

operate.

 

 

 

instructions in "INSTALLATION".

 

 

2

The REMOTE connector wiring is wrong

2

Inspect the REMOTE connector wiring

5

 

 

or faulty.

 

and correct.

 

 

 

 

 

Turning the RIT/XIT

The Transmit Incremental Tuning function is

Press [XIT] to switch ON the function.

45

control has no affect on

switched OFF.

Using the XIT function does not change the

 

the transmit frequency.

 

 

main frequency display; XIT only changes

 

 

 

 

the RIT/XIT display.

 

 

 

 

 

 

 

You cannot access and

1

The repeater requires a Tone frequency

1

Review "FM REPEATER OPERATION"

38

use 10 meter band

 

for access.

 

and select the correct frequency and

 

repeaters.

 

 

 

type of Tone.

 

 

2

You are not operating split frequency.

2

You must transmit on the repeaterÕs

38

 

 

 

 

input frequency and receive on the

 

 

 

 

 

repeaterÕs output frequency. Refer to

 

 

 

 

 

"FM REPEATER OPERATION".

 

 

 

 

 

 

 

Digital operation results

1

Physical connections between the

1

Re-check all connections using this

6, 7

in few or no connects or

 

transceiver, computer, and TNC or MCP

 

manual, your TNC/MCP manual, and

 

contacts with other

 

are incorrect, or software settings in the

 

your computer hardware manual as

 

stations.

 

TNC or MCP are wrong.

 

references.

 

 

2

Different transmit and receive

2

Confirm that the RIT and XIT functions

44, 45

 

 

frequencies are being used.

 

are switched OFF. Confirm that you are

 

 

 

 

 

NOT operating split frequency.

 

 

3

The levels between the transceiver and

3

Adjust TX and RX levels using Menu

25, 41

 

 

the TNC/MCP are incorrect.

 

Nos. 20 (PKT.IN) and 21 (PKT.OUT) and

 

 

 

 

 

level controls on your TNC/MCP.

 

 

4

Your transmitted signal or the incoming

4

Reorient/relocate your antenna or

Ð

 

 

receive signal is too weak.

 

increase your antenna gain.

 

 

5

The TX delay time parameter in your

5

Set the TNC/MCP TX delay time to

Ð

 

 

TNC/MCP is set incorrectly.

 

more than 300 ms.

 

 

 

 

 

 

 

Attempts at controlling

1

Your RS-232C cable that connects the

1

Correct the cable.

83

the transceiver by a

 

transceiver with the computer is wired

 

 

 

computer have failed.

 

incorrectly.

 

 

 

 

2

Communications parameters set in your

2

Use the same parameters in the

50

 

 

terminal program do not match the

 

terminal program and the transceiver.

 

 

 

parameters in the transceiver.

 

Refer to "COMMUNICATION

 

 

 

 

 

PARAMETERS".

 

 

3

If using a third party terminal program

3

Obtain a terminal program that fully

85, 89

 

 

(not supplied by KENWOOD) on your

 

supports the TS-870S protocol. If

 

 

 

 

 

 

computer, it is not accurately interfacing

 

designing your own program, refer to

 

 

 

with the transceiver COM port protocol.

 

information in "COMPUTER CONTROL

 

 

 

 

 

COMMANDS".

 

 

4

The serial port on your computer is not

4

Disconnect the computer from the

Ð

 

 

functioning correctly.

 

transceiver, and run a utility program to

 

 

 

 

 

 

 

 

test the computer serial port. Loop back

 

 

 

 

 

the computer serial port transmit and

 

 

 

 

 

receive pins to test the port fully.

 

 

 

 

 

 

 

73

Page 78 Page 80
Page 79
Image 79
Kenwood TS-870S instruction manual Swr
Page 78 Page 80

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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