Programming a Packet Path

1A packet path specifies how APRS data should be transferred via one or more repeaters. A repeater, which

2is used for packet transfer, is commonly called a

3digipeater. This came from a digital repeater. A

4digipeater is usually located on a mountain top or high building. Unlike a voice repeater, it operates on a

5simplex frequency. Each volunteer who installs a

6digipeater declares his (or her) digipeater to be a “wide”

1Press [MENU] to enter Menu mode.

2Press [2], [8] to select “2–8 (PACKET PATH)”.

•The display for entering characters appears; the first digit blinks.

STA CON

96 BCONDUP

5 7 9

type or “relay” type. Generally a wide-type digipeater transmits packets over much greater distances than a

8relay-type one.

9The APRS supports various methods for specifying a

10 packet path. Some of those methods are described on

11the next page. This transceiver allows you to edit a path using a maximum of 32 alphanumeric characters. The

12default is “RELAY,WIDE” that is one of the common

13settings. A comma must be put between each

14parameter.

15Note: This transceiver is incapable of functioning as a digipeater.

17
18
19
20
21
22
23	Wide-type

Relay-type

3Press [UP]/ [DWN] to select a character.

•You can enter 0 to 9, A to Z, , (comma), and –.

4Press [OK].

•The cursor moves to the next digit.

5Repeat steps 3 and 4 to enter up to 32 digits.

•Pressing [OK] after selecting the 32nd digit completes the programming.

•To complete programming after entering less than 32 digits, press [OK] twice.

•Each press of [ESC] causes the cursor to move backward.

•Pressing [A/B] deletes the digit at which the cursor is blinking.

6Press [MENU] to exit Menu mode.

You can also use the keypad to enter alphanumeric characters in step 3. For example, each press of [TNC] switches entry as A, B, C, then 2. Press [ENT] to switch between , and –.

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.

Kenwood 144, TH-D7A Programming a Packet Path, Repeat steps 3 and 4 to enter up to 32 digits

Models: 144 440 MHz TH-D7A TH-D7A