PACKET OPERATION

1Packet is a unit of data transmitted as a whole from one

2computer to another on a network. Packets can be

3transmitted on radio waves as well as on communications lines. Besides a transceiver and a

4computer, all you need is a terminal node controller

5(TNC). A TNC converts packets to audio tones and vice

6versa as one of its tasks. This transceiver has a built-in TNC.

7

A variety of packet applications developed by hams

8include packet bulletin board systems (PBBSs). PBBSs

9are created and maintained by volunteers called a

10System Operator (SysOp). You may access one of your local PBBSs to send e-mail, download a file, or obtain

11various useful information. Thousands of PBBSs, which

12have formed a worldwide network, relay e-mail to its

13intended destination around the world. First find out the call signs and frequencies used by your local PBBSs.

14

Reference material for starting packet operation should

15

be available at any store that handles Amateur Radio

16

equipment.

17

Note:

 

◆ Not all functions available via conventional TNCs are supported by

18

the TNC built in this transceiver.

19

◆ Packet operation, easily affected by transmit and receive conditions,

requires a full-scale S-meter reading for reliable communication.

20

When the S-meter reads less than maximum during 9600 bps

21

operation, communication errors are frequent.

◆ This transceiver is incapable of functioning as a digipeater.

22

◆ “

” indicates packets to be transmitted still remain in the buffer.

23

TH-D7E Only: When using the VHF band to transmit packets, do not

 

select the narrow transmit deviation {page 51}.

PBBS

Mail box

Bulletin board

Data library

52

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Kenwood 440 MHz TH-D7A, 144 Packet Operation, Reference material for starting packet operation should, Equipment
Page 59 Page 61

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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