Problem

 

Probable Cause

 

Corrective Action

Ref. Page

 

 

 

 

 

 

 

 

You cannot transmit by

1

You selected a frequency outside

1

Select a frequency within the

7

 

pressing the PTT

 

the allowable transmit frequency

 

allowable transmit frequency range.

 

 

switch.

 

range.

 

 

 

 

 

2

You selected a transmit offset that

2

Press [F], [MHz] repeatedly so neither

21

 

 

 

places the transmit frequency

 

“+” nor “–” is visible.

 

 

 

 

outside the allowable range.

 

 

 

 

 

3

TX Inhibit is ON.

3

Access Menu 1–5–5 and select “OFF”.

51

 

 

4

Tone Alert is ON.

4

Press [F], [ENT] to switch OFF Tone

47

 

 

 

 

 

Alert.

 

 

 

5

Packet data was being transmitted

5

Press the PTT switch after transmitting

—

 

 

 

using the data band.

 

of packet data is completed.

 

 

 

 

 

 

 

The transceiver

The Automatic Power Off (APO)

Switch OFF the APO function.

49

 

switches OFF for no

function is ON.

 

 

 

 

apparent reason.

 

 

 

 

 

 

Turning the VOL control

The speaker for the band you wanted

Press [BAL], then [UP]/ [DWN] to

48

 

does not allow you to

to monitor was muted.

correctly adjust the volume balance

 

 

hear audio.

 

 

between the two bands.

 

 

 

 

 

 

 

 

 

Packet operation results

1

The squelch is open.

1

Select the correct squelch level so that

8

 

in no connects with

 

 

 

the squelch is opened only when

 

 

other stations.

 

 

 

signals are present.

 

 

 

2

You did not select the same

2

Use HBAUD command to select the

54

 

 

 

transfer rate as the target station.

 

appropriate transfer rate.

 

 

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

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Page 98 Page 100
Page 99
Image 99
Kenwood 440 MHz TH-D7A, 144 instruction manual Press BAL, then UP/ DWN to
Page 98 Page 100

144, 440 MHz TH-D7A, 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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