User manual KENWOOD TH-D7A

[. . . ] INSTRUCTION MANUAL 144/440 MHz FM DUAL BANDER TH-D7A TH-D7E 144/430 MHz FM DUAL BANDER STA CON 5 7 PACKET96BCONDUP 9 KENWOOD CORPORATION © B62-1004-00 (K, E) (A) 09 08 07 06 05 04 03 02 01 00 THANK YOU! We are grateful you decided to purchase this KENWOOD FM Dual Bander. KENWOOD always provides Amateur Radio products which surprise and excite serious hobbyists. This time KENWOOD presents a handheld with a built-in TNC to make data communications much more convenient than before. KENWOOD believes that this product will satisfy your requests on both voice and data communications. FEATURES This transceiver has the following main features. [. . . ] Access Menu 1­5­4 (TUNE ENABLE) and select "ON". 50 TX INHIBIT You can disable the transmit function to prevent unauthorized individuals from transmitting, or to eliminate the risk of accidentally transmitting by yourself. Access Menu 1­5­5 (TX INHIBIT) and select "ON". ADVANCED INTERCEPT POINT (AIP) The VHF band is often crowded in urban areas. AIP helps eliminate interference and reduce audio distortion caused by intermodulation. Access Menu 1­5­6 (TH-D7A) or Menu 1­5­8 (TH-D7E) and select "ON". 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Note: When using the VHF band to transmit packets, do not switch the function ON. · Pressing the PTT switch after switching TX Inhibit ON causes the transceiver to generate an error beep and display "TX INHIBIT!". Note: x This transceiver does not allow you to use the AIP on the UHF band. x Switching ON the AIP also affects the VHF sub-band on band B. SWITCHING AM/FM MODE (TH-D7A ONLY) This transceiver allows you to select AM or FM mode to receive on the 118 MHz band. 2 Press [F], [6] to switch between AM and FM. · The 1 MHz decimal becomes long when AM mode is selected. SWITCHING TX DEVIATION (TH-D7E ONLY) This transceiver is capable of switching the VHF band to narrow transmit deviation. Access Menu 1­5­7 (144Tx NARROW) and select "ON". 21 22 23 51 PACKET OPERATION 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Packet is a unit of data transmitted as a whole from one computer to another on a network. Packets can be transmitted on radio waves as well as on communications lines. Besides a transceiver and a computer, all you need is a terminal node controller (TNC). A TNC converts packets to audio tones and vice versa as one of its tasks. A variety of packet applications developed by hams include packet bulletin board systems (PBBSs). PBBSs are created and maintained by volunteers called a System Operator (SysOp). You may access one of your local PBBSs to send e-mail, download a file, or obtain various useful information. Thousands of PBBSs, which have formed a worldwide network, relay e-mail to its intended destination around the world. First find out the call signs and frequencies used by your local PBBSs. Reference material for starting packet operation should be available at any store that handles Amateur Radio equipment. Note: x Not all functions available via conventional TNCs are supported by the TNC built in this transceiver. x Packet operation, easily affected by transmit and receive conditions, requires a full-scale S-meter reading for reliable communication. When the S-meter reads less than maximum during 9600 bps operation, communication errors are frequent. x" " indicates packets to be transmitted still remain in the buffer. select the narrow transmit deviation {page 51}. PBBS Mail box Bulletin board Data library 23 TH-D7E Only: When using the VHF band to transmit packets, do not 52 CONNECTING WITH A PERSONAL COMPUTER You can use an optional PG-4W cable to connect the transceiver with a personal computer. For this cable, contact your authorized KENWOOD dealer. Note: Turn OFF the transceiver power before making the connection. OPERATING TNC This transceiver has a built-in TNC which conforms to the AX. 25 protocol. The TNC accepts data from your personal computer and assembles it into packets. [. . . ] When ON, starting key entry causes the computer to stop displaying received packets. Specifies the interval from one transmission until retry of transmission. Selects 4800 or 9600 bps as the transfer rate between the TNC and the GPS receiver. Specifies the content of data to be output to the GPS receiver; this data is used to program the default settings on the receiver. [. . . ]