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Describes the SCS-PTC-IIIusb as an original development for digital shortwave communication.
Outlines the necessary hardware and software prerequisites for operating PACTOR and the PTC-IIIusb.
Explains the manual's purpose, structure, and how to use it as a reference.
Clarifies font usage for different types of information within the manual.
Discusses the use of the PTC-IIIusb for HF-email and its relation to email clients.
Details the software and USB driver included on the SCS CD-ROM for operating the PTC-IIIusb.
Lists and describes the programs available on the SCS CD-ROM for PTC-IIIusb operation.
Explains how version numbers are used to distinguish components like bootloader, firmware, and software.
Lists common file types and their extensions used with the PTC-IIIusb firmware.
Introduces the extended PTC firmware features for mobile and maritime applications.
Describes PACTOR-3 as a third-generation HF protocol with advanced features and high performance.
Explains the PACTOR-IP-Bridge as an SCS protocol for HF Internet access via PPP.
Details EasyTransfer, a program for binary file transfers and chat over HF.
Describes SCSmail, enabling users to establish their own email system over radio connections.
Recommends SCSupdate for performing modem firmware updates easily and efficiently.
Provides instructions and guidelines for sending SCS products for maintenance and repair.
Explains the two alternative power input options for the PTC-IIIusb and their specifications.
Details the USB 1.1 device connection and the necessary driver installation procedure.
Describes the optional Bluetooth feature as a cable replacement for PC connection and its advantages.
Explains the physical installation of the Bluetooth transceiver and its software setup on the PC.
Details the function of the four-position rear side configuration switch.
Explains the ON setting for the dip switch, enabling continuous power to the PTC-IIIusb.
Describes the BIOS switch function, enabling access to the bootloader for system recovery.
Notes that the SPARE switch position is currently reserved for future extensions.
Explains PACTOR-2 signal requirements and connection procedures to transceivers.
Provides specific wiring details for connecting ICOM transceivers via 8-pin DIN, 13-pin DIN, and 9-pin SUB-D connectors.
Details connection methods for Kenwood transceivers using 13-pin DIN, 6-pin Mini-DIN, and microphone jacks.
Explains connections for Yaesu transceivers using 5-pin DIN and 6-pin Mini-DIN connectors.
Guides on carefully adjusting PTC-IIIusb output amplitude for connected transceivers to avoid signal distortion.
Provides specific advice for optimizing PACTOR-3 data throughput and signal quality.
Explains how the PTC-IIIusb controls modern amateur radio transceivers via a serial interface.
Details connecting to KENWOOD transceivers using 6-pin DIN (TTL) and 9-pin SUB-D (V24) connectors.
Explains connecting to ICOM equipment using 3.5 mm jack sockets for remote control.
Details connecting YAESU transceivers via 6-pin Mini-DIN and 9-pin SUB-D connectors.
Describes connecting a GPS receiver to the PTC-IIIusb for positional data acquisition.
Explains the USB LED's function for indicating data traffic between PTC-IIIusb and PC.
Describes the Bluetooth LED's function for indicating traffic via the Bluetooth connection.
Details the TFC/ERR LED's function as a traffic and error indicator.
Explains the P3/P2/P1 LED's role in indicating the current PACTOR mode.
Describes the QUAL LED's function as a tuning indicator, especially in Unconnected/STBY state.
Explains how the QUAL LED shows connection quality in PACTOR mode.
Describes the Lock/Tune LEDs as a tuning indicator with QUAL LED in Unconnected state.
Explains the Tune and Lock LEDs for frequency and phase correction status in PACTOR.
Details the CON and ISS LEDs indicating connection status and information sending station.
Explains the ON/STBY LED's function for indicating power status and standby mode.
Describes how status LEDs indicate firmware loading progress.
Explains how status LEDs indicate firmware or BIOS update progress.
Explains the general operation of the PACTOR-Controller using commands via the USB interface.
Clarifies font usage for different types of information within the manual.
Describes the structure of PTC commands, including arguments, abbreviations, and case insensitivity.
Explains how PTC-IIIusb commands are grouped into menus and the corresponding prompt indicators.
Explains the STBY condition and how the PTC automatically handles AMTOR/PACTOR calls.
Highlights PTC-IIIusb features like USB connection behavior and single-port limitations.
Lists PTC commands available for remote station control via HF link with two control possibilities.
Describes the PTC's built-in mailbox, its storage, limitations, and access methods.
Details file operations within the mailbox, including batch access and file numbering.
Explains special handling for file reads, including automatic case conversion for speed.
Explains how PR users access the PTC mailbox simultaneously via PACTOR or AMTOR.
Describes practical operation of the PR mailbox, including help commands and alternative inputs.
Explains how PR connects can be passed to the PTC-IIIusb PR-mailbox.
Details properties of mailbox commands, including file input termination and directory setting.
Introduces the NAVTEX processor for receiving maritime safety information via SITOR-B.
Provides general information about the NAVTEX service and its technical aspects.
Explains the NAVTEX message structure, including message identifiers and types.
Details how to configure and activate the automatic NAVTEX processor and its commands.
Offers practical advice for NAVTEX reception, including frequency settings and parameters.
Describes the AMTEX system, an amateur radio adaptation of NAVTEX, and its message types.
Explains the PTC-IIIusb's capability to link with GPS receivers for positional information.
Details connecting a GPS receiver and its compatibility with TTL and RS232/V24 signal levels.
Explains how to request GPS position data using the POSition command and its formats.
Introduces APRS (Automatic Position Reporting System) for automatic position data transfer.
Describes how to set a comment text for APRS datagrams, including length limits and deletion.
Explains defining the AX.25 transmit path with target callsign and digipeaters.
Details entering position data for FIX operation in the correct format.
Explains activating or deactivating compression of position data in APRS datagrams.
Describes setting the graphic APRS symbol for display by receiving stations.
Explains setting the beacon interval in seconds for transmitting position data.
Explains setting or checking the radio link baud rate for Packet-Radio operation.
Describes how to turn the connect bell on or off.
Explains setting the T3 or link activity timer for querying link status.
Explains enabling or disabling the transmission of connect text.
Details establishing an AX.25 link to a target callsign, including digipeaters and port usage.
Describes activating or deactivating the display of time stamps on connect and disconnect messages.
Explains manual activation of the converse mode, used for direct communication.
Describes listing the channel condition and link status.
Explains setting the connect text transmitted when a connect is received.
Explains enabling or disabling digipeating using the user's own station.
Details ending an AX.25 link, including data transmission before disconnect.
Explains setting the acknowledgment time for packets and its dynamic recalculation.
Lists all available Packet-Radio commands for reference.
Explains switching to or exiting hostmode, and its usage for hostmode programs.
Describes activating KISS mode, which degrades the PTC to a pure modem for AX.25 processing on PC.
Sets the maximum number of unacknowledged info packets in a link.
Controls whether the monitor remains switched on and sets the type of frames displayed.
Removes specified characters from the data stream for PR-terminal mode.
Switches the monitor on or off and selects which frame types to monitor.
Activates or deactivates time stamping for packets displayed via the monitor.
Sets the connect-text for the PR-mailbox, identical to CText command.
Handles alternative station callsigns for incoming connects and digipeater functions.
Defines the PTC's callsign for Packet mode and its interaction with PACTOR callsigns.
Sets the callsign for the PR mailbox, automatically assigning SSID-8 or using PACTOR MYCALL.
Sets the maximum PR transmit packet length in Terminal mode.
Sets the persistence value, probability of transmitting after channel is free.
Enables or disables the PR-mailbox and configures it as a maildrop.
Exits Packet mode and returns to the cmd: input prompt.
Sets the AX.25 timer-2 (T2) value in milliseconds for response time delay.
Sets the maximum number of repeats allowed before a link failure message.
Switches between the various logical channels available for Packet-Radio.
Sets the slot time in milliseconds for transmitter control and defines periods between transmissions.
Activates or deactivates Trace mode for a special display of frames in the monitor channel.
Sets the time delay in milliseconds between keying PTT and initial data transmission.
Sets the audio output level for FSK and AFSK modes independently.
Sets the target callsign for Unproto operation and starts transmission in Converse mode.
Limits the number of channels available for remote users and allows PR-connects to the mailbox.
Explains the hostmode functionality and its compatibility with TNC/PTC and PC control programs.
Explains the PTC-IIIusb's hostmode compatibility with WA8DED standard for TNC/PTC and PC control.
Warns that PTC-IIIusb expects time parameters in milliseconds, not TNC2's 10 ms steps.
States PTC-IIIusb's full compatibility with the DAMA standard for Packet-Radio.
Compares hostmode commands with terminal mode commands in a table.
Details the 'C' command for establishing an AX.25 link to a target callsign in hostmode.
Explains the 'D' command for disconnecting an AX.25 link in hostmode.
Describes the 'F' command for setting the Frack-Timer (T1) value in milliseconds.
Notes that 'G' is a special hostmode command for getting channel information, not user-entered.
Explains setting the station callsign for each channel in hostmode.
Details the JHOST command for switching to or exiting hostmode.
Describes switching the time stamp display for connect and disconnect messages on/off.
Mentions the 'L' command requests link-status for channels (hostmode program only).
Sets which frame types are displayed in the monitor.
Sets the maximum number of repeats before a link failure message.
Sets the maximum number of unacknowledged info packets in a link.
Sets the persistence value, probability of transmitting after channel is free.
Switches PTC-IIIusb to Packet-Radio mode and loads DSP program code.
Explains reading GPS position data in NMEA format using the PS command.
Switches PTC-IIIusb to PACTOR mode and loads DSP code.
Sets the TxDelay in milliseconds for the PTT and initial data transmission.
Enables or disables the connect text and defines its content.
Gives a longer version string.
Defines the slot time for transmitter control in milliseconds.
Limits the number of channels available for remote users.
Shows the free buffer available in the PTC-IIIusb.
Allows setup of FAX reception under hostmode control and buffer management.
Activates KISS mode via commands KISS or @K, which terminates via system reset or software sequence.
Allows access to 16-bit audio samples from the HF port for frequency spectrum display.
Sets the AX.25 timer 2 (T2) value in milliseconds for response time delay.
Sets the T3 or link activity timer for polling link status.
Sets or checks the radio link baud rate for Packet-Radio.
Identical to CLR command in terminal mode, works on PACTOR channel.
Identical to BRightn command, sets LED display brightness.
Initiates a BREAKIN, works only in the receiving condition (IRS).
Turns PACTOR listen mode on or off.
Activates hostmode terminal expansion or switches it off.
Performs a CHANGEOVER or initiates a BREAKIN in receiving condition.
Puts an "over token" to PACTOR transmit buffer, transitions ISS to IRS state.
Displays total bytes sent and confirmed in PACTOR, can be reset.
Displays firmware and BIOS version numbers.
Enables synchronizing PTC with external frequency scanners.
Explains the extended WA8DED hostmode for easier channel polling and reduced overhead.
Describes JHOST5 enabling extended CRC-hostmode for reliable data transfer.
Explains the fundamental principles of the extended hostmode protocol and data packet structure.
Details the CRC hostmode's ability to detect and retransmit erroneous data packets.
Describes JHOST5 enabling extended CRC-hostmode for reliable data transfer.
Explains the fundamental principles of the extended hostmode protocol and data packet structure.
Defines the MASTER condition in the CRC hostmode, including NACK and ACK conditions.
Defines the SLAVE condition in the CRC hostmode, including NACK, ACK, and Request conditions.
Discusses interpretation of errors and header sequences during CRC hostmode operation.
Explains how to start the CRC-hostmode using the JHOST4 command.
Provides example source code in Turbo Pascal for CCITT CRC16 calculation.
Introduces PSK31 as a modern RTTY variation with reduced bandwidth and interference resistance.
Explains how to activate the PSK31 mode using the PSKTerm command and its usage.
Details how audio carrier frequencies are calculated and adjusted for PSK31 operation.
Guides on adjusting the PSK31 output level using the FSKA command, warning against over-driving.
Describes the PSK31 prompt and status display, noting compatibility features.
Explains the control codes (Hot-keys) used for PSK31 terminal operation, including Ctrl-L, Ctrl-K, Ctrl-X, Ctrl-C/I, Ctrl-N.
Explains using QUAL and LOCK/TUNE LEDs for tuning PSK31 signals and automatic frequency adjustment.
Describes the CWID feature in PSK31 terminal, activated during Audio Only mode.
Describes the Audio loop test function to check analogue I/O stages and DSP performance.
Allows permanent activation of audio output, useful as an AF filter/denoiser.
Serves to end the sys:-menu, returning to the cmd: prompt.
Activates the FSK test routine, toggling between Mark and Space tones.
Lists sys:-menu commands and provides descriptions for specific commands.
Enables stepping through PTC mailbox directories and removing entries.
Performs an LED test to check the PTC-IIIusb's lighting console.
Tests the DSP PLL, providing OK or NOT OK status.
Activates the PTT test routine by toggling the PTT switching transistor.
Exits the sys:-menu and returns to the cmd: prompt.
Displays the measured RAM available in the PTC-IIIusb.
Displays the PTC-IIIusb's serial number, which is always 16 digits.
Tests the transceiver control port, requiring a special test adapter.
Explains how to define up to 32 channels, each with frequency, scan status, gate status, and an optional comment.
Serves to leave the trx:-menu, returning to the cmd: prompt.
Enables transceiver dump mode for direct communication, acting as a level/baudrate converter.
Sets the dwell time for the PTC scanner on each channel in 100 ms steps.
Allows direct setting of the TRX frequency without defining a scan channel.
Provides a short list of trx:-menu commands and descriptions for specific commands.
Selects the Kenwood protocol or modified protocol for newer Yaesu transceivers.
Lists the entire defined PTC frequency list, referring to the Channel command.
Applies an offset value to frequencies for transceiver tuning, especially for SSB mode.
Allows inserting a parity bit for transceiver remote control port communication, affecting Kenwood format.
Sets the pulse time in milliseconds for Up and Down keying initiated by commands.
Serves to leave the trx:-menu, returning to the normal prompt.
Selects R&S transceiver models XK-2000 or XK-852 for remote control.
Controls the scanner (start/stop) and toggles the scan status for individual channels.
Defines up to 10 timers with start and stop times for channel scanning.
Sends character sequences to the transceiver via the command interpreter, supporting KENWOOD and other types.
Enables configuration of the PTC-IIIusb TRX interface, specifying transceiver, baudrate, and ICOM ID/VFO.
Defines the time in seconds the scanner waits after a link ends before switching channels.
Allows setting the Scan parameter for a channel defined in the TRX list.
Specifies special YAESU transceiver sub-types for frequency readback and control.
Transfers a scan stop signal via USB to external scanners, managing frequency changes.
Introduces special features related to transceiver control.
Explains direct channel selection for YAESU transceivers, using Recall Memory commands.
Details how to define channel attributes in the comment field for scan activation and antenna selection.
Explains automatic preamp switching for R&S XK-2000 and how to override it with channel attributes.
Describes timer attributes T and P for controlling channel scan based on time windows.
Explains the #:h attribute for transferring arbitrary binary data in hexadecimal format.
Details the #:L2 attribute for limiting a channel to PACTOR-1/2 operation.
Describes virtual hostmode channel 253 for transparent data exchange between PC and TRX port.
Explains the behavior of the Bootloader and firmware after switching on the PTC-IIIusb.
Details how to activate the Bootloader using the rear DIP switch labeled "BIOS".
Lists and describes commands available within the Bootloader mode.
Explains checking and setting the flash call (callsign) permanently in FLASH ROM.
Explains checking and setting the flash selcall permanently in FLASH ROM.
Displays usable commands and provides further help on commands in Bootloader mode.
Switches to SYStest commands within the Bootloader, changing the prompt to sys:.
Renews PACTOR firmware in Flash ROM, used with corresponding PC software.
Displays the version number of the Bootloader.
Lists SYStest commands available within the Bootloader mode.
Checks Flash-ROM for valid PACTOR firmware.
Calculates RAM checksum and displays it in hexadecimal form.
Displays usable commands and provides help on commands in Bootloader SYStest mode.
Checks the LED's, testing the whole lighting console.
Ends the SYStest and returns to the Bootloader command prompt.
Starts the PACTOR firmware, loading it from Flash ROM into RAM.
Explains PACTOR as a modern radio teletype mode developed to improve on AMTOR and PACKET-RADIO in weak shortwave conditions.
Discusses improvements in PACTOR-2 over PACTOR-1, focusing on adaptability and performance.
Details the PACTOR-2 protocol, including modulation system and synchronous ARQ.
Provides a general overview of the PACTOR-2 protocol, its modulation, and error correction.
Explains the DPSK modulation system used in PACTOR-2, including pulse shaping and bandwidth characteristics.
Discusses error correcting codes, block codes, and convolutional codes used in PACTOR-2.
Explains online data compression techniques like Huffman and Markov coding used in PACTOR-2.
Offers practical advice for using PACTOR-2, including initial setup and checks.
Provides essential points for PACTOR-2 operation, including callsign loading and AF level settings.
Compares PACTOR-2's speed and robustness to PACTOR-1, highlighting improvements in weak signal conditions.
Recommends UNPROTO modes for CQ calls and broadcasts, suggesting DPSK for Level-2 systems.
Details the Packet-Radio 9k6 cable for connecting VHF/UHF transceivers.
Describes the ICOM 8 pin audio cable for connecting ICOM transceivers.
Details the ICOM 9 pin audio cable for connecting ICOM GMDSS versions.
Describes the ICOM 13 pin audio cable for connecting ICOM transceivers.
Details the YAESU audio cable for connecting YAESU transceivers and 1k2 Packet-Radio.
Describes the KENWOOD audio cable for connecting KENWOOD transceivers.
Lists a 2m audio extension cable with 8-pin DIN connectors.
Lists a 3m audio extension cable with 8-pin DIN connectors.
Details the TRX-Control V24 cable for connecting transceivers with 9-pin SUB-D and speaker connectors.
Details the TRX-Control V24 cable for YAESU transceivers.
Describes the TRX-Control cable for YAESU transceivers with 8-pin Mini-DIN.
Details the TRX-Control cable for ICOM CIV ports.
Lists the USB cable for connecting the PTC-IIIusb to the PC.
Mentions a Bluetooth USB stick for computers without onboard Bluetooth.
Lists a cable with a 5-pin DIN connector.
Lists a cable with an 8-pin DIN connector.
Lists a cable with a 13-pin DIN connector.
Describes the two-pin screw terminal for PTC power supply connection.
Shows the type B USB connector used for connecting the PTC-IIIusb to a computer.
Details the pinout of the 13-pin DIN transceiver remote-control socket with TTL and V24 levels.
Explains the pinout of the 8-pole DIN socket for transceiver connections.
Shows the GPS connector pinout and its compatibility with TTL and V24 signals.
Provides cable color codes for 8-pole DIN, 5-pole DIN, and 13-pole DIN connectors.
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