User manual KENWOOD TH-42E

[. . . ] · Has a built-in TNC which conforms to the AX. 25 protocol. With a portable computer, allows you to enjoy Packet operation quite easily. · Includes a program for dealing with data formats supported by Automatic Packet/ Position Reporting System (APRS®) . · Is capable of receiving packet data on one band while receiving audio on another band. [. . . ] 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 This transceiver is incapable of functioning as a digipeater. 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-42E 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. This protocol is used for communications between TNCs. The TNC accepts data from your personal computer and assembles it into packets. The TNC cannot transmit in such a situation. e Access Menu 1­4­1 to select band A or B as the data band {page 55}. r Press [TNC] to switch ON the TNC. ·" " appears. t Press [TNC] again to enter Packet mode. · "PACKET" also appears. !0 Send appropriate commands and, if necessary, messages to the target station via the TNC. 54 SELECTING DATA BAND This transceiver is capable of receiving packet data on one band (data band) while receiving audio on another band. Select band A or B as the data band for receiving or transmitting packets. " " indicates the current data band; the default is band A. Access Menu 1­4­1 (DATA BAND) and select band A or B. FULL DUPLEX This transceiver is also capable of simultaneously transmitting and receiving signals. So, it is possible to transmit audio on the current band while receiving packet data on another band (data band). Press [DUP] to enter Full Duplex mode. · "DUP" appears. STA ST CON 5 1 2 3 4 5 6 7 PACKET96BCON ACKET96 9 7 8 9 10 You can also select the method for inhibiting the built-in TNC from transmitting. Access Menu 1­4­2 (DCD SENSE) and select one of the two methods. To exit Full Duplex mode, press [DUP] again. Note: x You cannot use the Full Duplex function after recalling the VHF band on band B or blanking one band. x When using the Full Duplex function, connect an earphone to the SP jack. Using an earphone will prevent feedback that can cause the transceiver to emit a howling sound. 11 12 13 14 15 16 17 18 D BAND ONLY: The TNC does not transmit when signals are present on the data band. BOTH BANDS: The TNC does not transmit when signals are present on the data band or another band. [. . . ] 21 Packet Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 Power-ON Message . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Programmable VFO . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Repeater Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]