Problem

Probable Cause

Corrective Action

Ref. Page

 

 

 

 

Operating the

1 Too large distance between the

1 Operate the Commander within a

—

Commander simply

Commander and Transporter

distance that allows the two

 

causes it to output an

prevents correct data

transceivers to show a full-scale

 

error beep and does not

communications.

S-meter reading.

 

allow you to control the

2 Bad radio wave conditions prevent

2 Press [SYNC] occasionally to read the

87

HF transceiver.

control commands from being

status of the HF transceiver.

 

 

correctly transmitted.

 

 

You cannot hear audio

You switched ON the CTCSS on the

Press [F], [3] to switch OFF the CTCSS.

40

received by the HF

144 MHz band of the Commander.

 

 

transceiver.

 

 

 

 

 

 

 

You cannot

You failed to correctly enter

Use Menu 3–1 to 3–6 to correctly enter

58, 59

superimpose

information to be superimposed.

the desired information.

 

information onto the

 

 

 

VC-H1 monitor.

 

 

 

 

 

 

 

You cannot program

Bad cable connections.

Refer to the instruction manual for the

57

the VC-H1 with a SSTV

 

VC-H1 and correctly connect the VC-H1

 

mode.

 

to the transceiver.

 

Note: When two received frequencies have relationships per the equation below or other similar relationships, an internal heterodyne may be heard. This is not a defect.

2 (fU – 45.05) – 4 (fV + 38.85) = 38.85 or 45.05 (fU – 45.05) – 2 (fV + 38.85) = 38.85

n (fSV – 45.05) – n (fV + 38.85) = 38.85 or 45.05 where n = 3, 4, or 5. fV = VHF frequency (band A)

fU = UHF frequency (band B) fSV = VHF frequency (band B)

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Kenwood TH-D7E, TH-D7A instruction manual Problem Probable Cause Corrective Action
Page 98 Page 100

TH-D7E, TH-D7A specifications

The Kenwood TH-D7A is a sophisticated handheld transceiver designed especially for amateur radio enthusiasts. It combines advanced features with user-friendly operation, making it a popular choice among both beginners and seasoned operators.

One of the standout features of the TH-D7A is its dual-band capability, allowing users to operate on both the 2-meter (144 MHz) and 70-centimeter (440 MHz) bands. This dual-band functionality gives operators increased flexibility and access to a wider range of communication channels. Additionally, the transceiver supports the simultaneous transmission and reception of two different frequencies, allowing for efficient monitoring of multiple communications.

The TH-D7A is equipped with an impressive 1,000 memory channels, which can be organized into 100 memory groups. This allows users to store a vast amount of frequencies and access them easily when needed. The transceiver also provides a wide frequency coverage, extending from 144 to 148 MHz and from 430 to 450 MHz in the VHF and UHF bands, respectively.

Another remarkable feature of the TH-D7A is its built-in Automatic Packet Reporting System (APRS) capabilities. This technology enables users to share real-time location data, send and receive messages, and provide status updates, making it an invaluable tool for outdoor activities and emergency communication.

In terms of construction, the TH-D7A features a durable and compact design, making it suitable for both portable and mobile use. The large, easy-to-read LCD display provides clear visibility in various lighting conditions. Additionally, the transceiver supports a variety of advanced voice modes, including FM, AM, and SSB (Single Side Band), offering a versatile communication experience.

The TH-D7A also incorporates a wide range of digital modes, enhancing its operational capabilities. With the included programming software, users can easily customize their settings, manage memory channels, and update firmware, ensuring the transceiver remains compatible with evolving technologies.

Power management is another highlight, as the TH-D7A provides adjustable output power levels, enabling users to conserve battery life when needed. Overall, the Kenwood TH-D7A is a feature-rich handheld transceiver that combines robust performance with innovative technology, making it a top choice for amateur radio operators seeking reliable communication in diverse environments. Its versatility, combined with its intuitive design, ensures it meets the needs of users across all experience levels.
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