Compatibility modes

The TDL510 radio provides the following radio compatibility options:

  • TRIMTALK

    • TRIMTALK v1 at 4800 bps on current Trimble GNSS rover receivers or TRIMTALK 450s radios on legacy models

  • TRIMMARK™ 3

    • TRIMTALK v1 at 9600 bps on current Trimble GNSS rover receivers

  • TRIMTALK 8/16 kbs

    • TRIMTALK v1 at 8000 bps on current Trimble GNSS rover receivers

  • PacCrest-4FSK

    • Transparent mode/FEC ON/Scrambling ON (option 1)

    • PCC EOT4 on current Trimble GNSS rover receivers

  • PacCrest-GMSK

    • Transparent mode/FEC ON/Scrambling ON (option 2)

    • PCC EOT on current Trimble GNSS rover receivers

  • PacCrest-FST

    • Pacific Crest-FST/FEC ON/Scrambling ON (option 5)

    • PCC FST, FEC On on current Trimble GNSS rover receivers

  • SATELLINE-3AS

    • SATEL FEC xx, Auto Rx on current Trimble GNSS rover receivers (xx is ON or OFF as set on the TDL510 radio)

All radio modems of a system must have identical FEC (ON or OFF) and Scrambling (ON or OFF) settings.

Settings in compatibility modes

Pacific Crest modems

Pacific Crest modems must have:

  • Protocol mode

  • Transparent w/EOT Timeout (when using Pacific Crest modulations)

  • TRIMTALK 450s (when using TRIMTALK GMSK modulation)

  • Modulation Type depends on the system

  • GMSK (default, always selected when using TRIMTALK 450s mode)

  • 4-Level-FSK

  • FEC = ON/OFF

  • Scrambling = ON/OFF

  • Data Security Code set to = 0 (=not used)

  • Local Address= 0...254 (0 by default)

    Pacific Crest modems receive messages from SATELLINE modems that have their TX1 address matching the Local Address.

  • Remote address=0...255 (255 by default, that is the broadcast address to be received by all).

The TDL510 radio receives the message from a Pacific Crest radio, provided their RX1 address matches the Remote Address of a Pacific Crest transmitter (or if the message has the broadcast address 255).

The configuration tools and settings are different between the TDL510 radio and Pacific Crest modems:

  • Pacific Crest modems are configured via the serial port using PDLCONF Windows program that sends binary control messages to the serial port of the modem.

  • The TDL510 radio is configured via the serial port using the Configuration Manager PC-program.

The table below shows a comparison of settings between Pacific Crest and the TDL510 radio:

Pacific Crest setting

Corresponding TDL510 setting

Identification: Owner

not implemented

Identification: Channel Bandwidth

Channel spacing

Identification: RF Power

TX power

Radio Link: Channel Selection Type (Manual)

Radio frequency

Radio Link: Current Channel

Radio frequency

Radio Link: Link Rate

Radio compatibility mode and channel spacing determine the link rate

Radio Link: Modulation Mode

Radio compatibility

Radio Link: Scrambling

ON by default

Radio Link: Transmit Retries

not implemented

Radio Link: TX ACK Timeout

not implemented

Radio Link: Csma Monitoring

Priority (RX=ON, TX=OFF) Default: TX

Radio Link: AutoBase/AutoRover

not implemented

Radio Link: Digisquelch

Signal threshold

Radio Link: Forward Error Correction

ON by default

Radio Link: Local Address (0 by default)

Primary RX address (RX1) (OFF by default)

Radio Link: Remote Address (255 by default)

Primary TX address (TX1) (OFF by default)

Serial Interface: Protocol Mode

Radio compatibility

Serial Interface: BREAK to Command

not implemented

Serial Interface: Modem Enable: Yes

N/A

Serial Interface: Soft Break Enable

not implemented

Serial Interface: EOT value (in 0.01s units)

Pause length (in serial port byte intervals)

Serial Interface: Digipeater Delay

not implemented

Serial Interface: Local Node Repeater

not implemented

Frequency Table

Radio frequency

Data Security Code (must be 0=not used)

not implemented

Potential conflicts:

  • The FEC setting applies only to the SATELLINE-3AS mode; the other radio compatibility modes have their own FEC bindings (although some previous or special firmware versions differ in the way the FEC setting is handled. if in doubt, please contact technical support).

  • Error check and Full CRC16 check must be OFF in the TDL510 radio.

  • TDL510 radio RX/TX addressing does not use ARQ scheme like Pacific Crest radios.

SATELLINE modems

SATELLINE modems must have the following key settings:

• FEC OFF (because the FEC here means SATEL 3AS FEC, not Pacific Crest/TRIMTALK FEC)

• Error check OFF

• Error Check mode OFF

• Radio Compatibility Option according to the list (setting dependent)

When TX address is selected ON, then TX1 address is used like PDL Remote address that is the destination address for the transmitted messages. Default value is 0x00FF (=255) (note the hexadecimal format of the setting).

When RX Address is selected ON, then RX1 address is used like PDL Local address. Default value is 0x0000 (=0) (note the hexadecimal format of the setting).

Addresses are NOT applicable in TRIMTALK mode so SATELLINE modems must have their RX/TX addresses OFF with Option3.