Topcon SRL-35 Operator's Manual
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Topcon SRL-35 Operator's Manual

Topcon SRL-35 Operator's Manual

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  • Page 3 Rev. B ©Copyright September, 2013 All contents in this manual are copyrighted by Topcon. All rights reserved. The information contained herein may not be used, accessed, copied, stored, displayed, sold, modified, published, distributed, or otherwise reproduced without express written consent from Topcon.

  • Page 4: Table Of Contents

    SRL-35 LCD Display After Power-up ........
  • Page 5 Select Repeater (Set SRL-35 to Act as a Repeater) ....... .
  • Page 6 Activating Tests ............. 72 SRL-35 Operator’s Manual...
  • Page 7 Product Conformity ............78 SRL-35 Operator’s Manual...

  • Page 8: Preface

    Windows® is a registered trademark of Microsoft Corporation. The Bluetooth® word mark and logos are owned by Bluetooth SIG, Inc. and any use of such marks by Topcon Positioning Systems, Inc. is used under license. Other product and company names mentioned herein may be trademarks of their respective owners.

  • Page 9: Restrictions On Use

    Restrictions on Use SRL-35 radio modems have been designed to operate on frequency ranges, the exact use of which differs from one region and/or country to another. The user of a radio modem must take care that the said device is not operated without the permission of the local authorities on frequencies other than those specifically reserved and intended for use without a specific permit.
  • Page 10 The allowed max output power depends on the type of station. SRL-35 is allowed to be used in the following countries, either on license free channels or on channels where the operation requires a license. More detailed information is available at the local frequency management authority.

  • Page 11: Introduction

    • • • • • • The SRL-35 is an IP67 classified UHF radio modem with a high power (35W) transmitter, wide 70 MHz tuning range (403...473 MHz) in one hardware and selectable channel spacing. The SRL-35 can offer radio speeds up to 19.2 kbps and has a selectable serial interface speed between 300 …...

  • Page 12: Components And Accessories

    Notes 20-830301-02 Soft case for Radio modem and cables Soft Carrying Case Please contact your local Topcon dealer to determine the standard kit available in your area and components included in the kit. Components and Accessories SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 13: Default Settings

    Default Settings The SRL-35 is shipped with the following default settings (unless otherwise specifically agreed): Table 6. Default Settings DEFAULT VALUES OF THE ADJUSTABLE SETTINGS (user can change settings later on) Setting Default value Range Radio frequency Operating TX frequency 438.000 MHz...

  • Page 14: Srl-35 Special Features

    SRL-35 Special Features Call Sign The SRL-35 has a CALL SIGN identifier feature required in some countries. A call sign can be formally assigned by a government agency, informally adopted by individuals or organizations, or even cryptographically encoded to disguise identity of a station.

  • Page 15: Temperature Protection Of Rf Power Amplifier

    11.5 A. LCD indicates the actual power level of the transmitter. A new transmission starts always with the nominal power level. The power control scheme is applied only when the nominal power level is 35W. SRL-35 Special Features SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 16: Radio Interface

    • • • • • • The SRL-35 radio has three interfaces; Communication, User, and RF, and the Power connection. The power connector on SRL-35 is a 4-pin mini style ODU connector. This chapter describes three interfaces available on the SRL-35 in detail.

  • Page 17: User Interface

    Display and Push Buttons The SRL-35 includes a LCD Display with a backlight. In the Data Transfer Mode the display will show the operating settings of the radio modem, for example the radio field strength and the supply voltage. By using the push buttons and the LCD Display, it is possible to change most of the settings of the radio modem, without the need for an external terminal.

  • Page 18: Display In Data Transfer Mode (Transmit/Receive Mode)

    FEC OFF Port 1 9600/8N1 Port 1 : Port interface and status  Exit RX Address RX Address RX1 OFF RX2 OFF Exit  TX Address TX Address TX1 OFF TX2 OFF  Exit User Interface SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 19: Display In Setup Mode

    Display in Setup Mode RF Interface The SRL-35 has a single TNC type RF-connector with impedance of 50 Ohm. When the modem is supplied the frequency is set to “default channel”. The user can change the frequency afterwards by 70 MHz. Of course, all local regulations set forth by the authorities must be taken into consideration.

  • Page 20: Transmitter

    The setting and/or using of non- approved power levels may lead to prosecution. Topcon and its distributors are not responsible for any illegal use of its radio equipment, and are not responsible in any way of any claims or penalties arising from the operation of its radio equipment in ways contradictory to local regulations and/or requirements and/or laws.

  • Page 21: Priority Rx/Tx

    Alternatively, weak data transmissions will be rejected, even though they would be otherwise acceptable. Priority RX/TX The SRL-35 offers a Priority setting, which selects the priority between reception and transmission. The setting can be changed in Programming Mode. By default, transmission has higher priority than reception i.e.

  • Page 22: User Data Whitening

    The use of error correction (FEC) is recommended in such cases. If that is not possible, the Data whitening feature can be used to improve the reliability of data transfer. The feature is set on/off in the programming mode. RF Interface SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 23: Transparent Data Transmission

    • • • • • • Serial Interface, Data Format The SRL-35 serial interface uses an asynchronous data format. No external synchronizing signal is needed, since necessary timing information is acquired from the start and stop bits transmitted before and after each data field bits (byte).

  • Page 24: Cts-Line

    CD-line The CD handshaking options are not supported by the SRL-35 modem. The options for CD-line are: 1) RSSI-threshold CD is active whenever a signal with a level exceeding the level required for reception exists on the radio channel.

  • Page 25: Radio Protocol Support

    Use of PDL and Satel protocols is recommended in applications where possible. Compatibility with TrimTalk is subject to some restrictions. The SRL-35 radio modem supports additional to the original SATEL 3AS data transfer also: • Pacific Crest compatible data transfer over the air, if the opponent Pacific Crest modems operate in the transparent mode/FEC ON/Scrambling ON that is the most common setup among RTK applications.

  • Page 26: Timing And Delays During Data Transmission

    However, the use of non-real-time operating systems (frequently used on PC-type hardware) often adds random pauses, which may result in the user data splitting into two or more separate RF transmissions. This may cause problems especially in the systems including repeater stations. Radio Protocol Support SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 27: Tx Delay

    The short data block is repeated continuously after 1 second break. Short data block test is suitable for running data communication tests. Error-free reception of data can be monitored using a suitable terminal program (TRU). Radio Protocol Support SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 28: Long Data Block Test

    68 ms 317 ms 1438 ms 9600 43 ms 52 ms 209 ms 912 ms 19200 40 ms 45 ms 154 ms 650 ms 38400 39 ms 41 ms 127 ms 519 ms Radio Protocol Support SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 29: Transmission Delays Using Pacific Crest Gmsk On 25 Khz Channel

    77 ms 390 ms 1796 ms 9600 52 ms 62 ms 281 ms 1272 ms 19200 50 ms 55 ms 226 ms 1009 ms 38400 48 ms 51 ms 198 ms 878 ms Radio Protocol Support SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 30: Settings

    Changing Parameters using TRU Topcon Receiver Utility (TRU) can be utilized to change parameters on the radio to configure it as per your job requirements. This section introduces basics of configuring the external SRL-35 radio using TRU. Refer to TRU reference manual for details on TRU application, available modes and details on the settings.
  • Page 31 Make sure to uncheck Internal Modem under Receiver Port on the Connection Parameters screen. Figure 4: Connect to Device 5. TRU automatically tries to connect to the SRL-35 radio by detecting default settings for serial port. Serial port parameters of the program as follows: 9600 bits/s, 8 data bits, none parity, 1 stop bit, (default in Programming Mode).

  • Page 32: Configuring Radio In Modem Managing Mode

    Satel FEC ON/OFF has an effect to Satel-3AS protocol only. It is necessary to make sure that FEC is off for the radio to transmit correctly if using protocol other than Satel-3AS. Changing Parameters using TRU SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 33: Loading Frequencies/Channels

    Loading Frequencies/Channels Channels/frequencies on the SRL-35 radio can be loaded using the Functions tab. You will need to inform your local dealer about licensed frequencies and dealer will supply you .mcf file (channel file for SRL-35 radio). Licensed frequencies are obtained by your local radio regulatory authority.
  • Page 34 Figure 7: Choose Frequency Editing ModeClick the MCF Creator icon to create MCF Files for user distribution. Figure 8: MCF Creator Icon 5. When MCF Creator dialog appears, click Add to add a frequency (along with channel number, spacing, and max power). Changing Parameters using TRU SRL-35 Operator’s Manual P/N: 1003224-01...
  • Page 35 Figure 9: MCF Creator - Add Figure 10: MCF Entry Dialogue Box Maximum power is the power level in mW to the particular channel. Changing Parameters using TRU SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 36: Changing Parameters Using The Lcd Display

    Figure 11: Save the MCF File Changing Parameters using the LCD Display The SRL-35 contains an LCD display that shows the valid functions and allows modification of the settings. On standby mode the LCD display shortly displays the basic information. The following settings are shown: TX and RX frequencies, TX Power, and Channel Spacing.

  • Page 37: Changing Channel (Channel Of The Active Tx/Rx Radio With Preset Frequencies)

    Press “CANCEL” if not modifying channel and CANCEL ▲▼ SET return to previous menu. Save changes? If channel is modified press “YES” to save settings or “NO” to discard changes and return to previous menu. Changing Parameters using the LCD Display SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 38: Changing Protocol (Radio Protocol Of The Active Radio)

    Save changes? If protocol is modified press “YES” to save settings or “NO” to discard changes and return to previous menu. Select Repeater (Set SRL-35 to Act as a Repeater) Press ▲ or ▼ until the display panel and the SELECT cursor >...

  • Page 39: Select Fec

    Press “NO” to disregard changes and return to Data Transfer Mode screen. TrimTalk, and Pacific Crest Mode Settings In order to use the Pacific Crest/TRIMTALK modes implemented in the SRL-35 modem: PACIFIC CREST modems must have: Protocol Mode = •^: Transparent w/EOT Timeout (when using Pacific Crest modulations)
  • Page 40 •^: Data Security Code set to = 0 (=not used) •^: Local Address= 0…254 (0 by default) Pacific Crest modem receives messages from the SRL-35 modem that has its TX1 address matching the Local Address. •^: Remote address=0…255 (255 by default, that is the broadcast address to be received by all).
  • Page 41 • The SRL-35 radio modem is configured via the serial port using TRU. The table below shows the analogy of settings between Pacific Crest radio modems and the SRL-35 radio modem. Table 16. PacCrest and SRL-35 Settings Pacific Crest setting...
  • Page 42 Data Security Code (must be 0=not used) (not implemented) Potential conflicts: - Error check and Full CRC16 check must be OFF in SRL-35 modem - SRL-35 RX/TX addressing does not use ARQ scheme like Pacific Crest radios. Changing Parameters using the LCD Display SRL-35 Operator’s Manual...

  • Page 43: Installation

    The radio modem should be installed with the installation accessories supplied with the radio modem. RS-232 Wiring Refer to “Data Connector” on page 47. In the SRL-35, the voltage is limited to 16V. Fuse A proper fuse must be connected in between the radio modem and the power supply. The correct value is 15A for the SRL-35.

  • Page 44: Power Supply

    Odu-connector are connected to the positive power supply line. The pins 3 and 4 are connected to negative power supply line (ground). Antenna Installation Because of the great transmission power of the SRL-35 radio modem, only an external antenna is allowed. A whip-antenna directly connected to the antenna connector must not be used. Mobile Equipment •...
  • Page 45 The radio modem antenna cannot be mounted on the same level as the other substation antennas in the same building. The Antenna Installation SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 46: Factors Affecting The Quality And Distance Of The Radio Connection

    Topcon recommends the use of a band-pass filter with a large Q in the antenna cable of the base station. By using amplifying antennas (G=Gain) and by installing the antenna high, long connection distances can be realized using the SRL-35 radio modem.

  • Page 47: Radio Field Strength

    The SRL-35 operates in the 450 MHz band, where man made interference is insignificant. Long distance interference needs not to be taken into account even in special weather conditions. The SRL-35 tolerates normal levels of interference that occur. However, exceptionally high levels of interference can break through the safeguards and thus cause errors in data transfer.

  • Page 48: Repeater Mode And Addressing

    Repeater In circumstances where it is necessary to extend the coverage area of a radio modem network, the SRL-35 can be used as a repeater station. The maximum size of a repeated data packet is 1kB (kilobyte). The Repeater Function is switched on using the Programming Mode.

  • Page 49: Addressing

    In networks with repeaters it is usually necessary to use addresses to prevent data messages from ending up in loops formed by repeaters. The SRL-35 allows the use of individual addresses both for reception and transmission. Addresses can be switched on separately, or simultaneously, in both data transfer directions.

  • Page 50: Transmission

    Data does not appear on the RS-232 - send the actual data to the RS-232 interface. interface. However, if the ”RX Address to RX-line” setting is on, the radio modem does not remove the address. Addressing SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 51: Connection Between Two Points

    In a similar way, the substation will add when transmitting to the base station its address characters into the Addressing SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 52: Using Repeaters And Addresses In The Same System

    DATA In the above, R2 ADD is address of repeater 2, R1 ADD is address of repeater 1 and M ADD is the address of the base-station. Using Repeaters and Addresses in the Same System SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 53: Repeater Chain Using Address Pairs

    Repeaters may also act as ordinary substations; in that case the terminal device must wait until the message has reached the end of the repeater chain before sending data. Figure 13: Repeater Chain Using Dual Addressing Using Repeaters and Addresses in the Same System SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 54: Redundant Repeater Chain

    Pacific Crest PDL modems. The default value is 0x0000 (0 in decimal format). SRL-35 modem needs to have TX Delay 50ms or more in order to avoid messages from colliding in case it is to be placed in a Pacific Crest system that uses addressing and acknowledging scheme.

  • Page 55: Specifications

    Adjacent Channel > 47 dB @12.5 kHz Selectivity > 52 dB @ 25 kHz Selectivity 67 dB @ ±50 kHz Intermodulation > 60 dB Attenuation Blocking > 86 dB Spurious Rejection > 60 dB Specifications SRL-35 Operator’s Manual P/N: 1003224-01...
  • Page 56 4800 9600 TrimTalk450s(P) GMSK 4800 9600 TrimTalk450s(T) GMSK 4800 9600 PCC-FST GMSK 9600 19200 a. Use of PDL and Satel protocols is recommended in applications where possible. Compatibility with TrimTalk is subject to some restrictions. SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 57: Connectors

    Not connected Not connected Programming Mode is for changing the settings of the radio modem via Programming menu. Normally the MODE line is NOT connected i.e. the radio modem is in Data Transfer Mode. Connectors SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 58: Power Connector

    Operation Voltage +9 … +16 VDC Note Ground Note*** Ground Note*** Both PWR pins 1&2 must be connected! Both GND and pins 3&4 must be connected! Antenna Connector The antenna connector is a 50 Ohm TNC Female. Connectors SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 59: Warranty And Safety Instructions

    A letter should accompany the package furnishing a description of the problem and/or defect. The purchaser’s sole remedy shall be replacement as provided above. In no event shall Topcon be liable for any damages or other claim including any claim for lost profits, lost savings or other incidental or consequential damages arising out of the use of, or inability to use, the product.
  • Page 60 If this product has been dropped, altered, transported or shipped without proper packaging, or otherwise treated without care, erroneous measurements may occur. The owner should periodically test this product to ensure it provides accurate measurements. Inform TPS immediately if this product does not function properly. General Warnings SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 61: Appendix A

    61 3D 62 3E > 63 3F 64 40 65 41 66 42 67 43 68 44 69 45 70 46 71 47 72 48 73 49 74 4A 75 4B 76 4C Appendix A SRL-35 Operator’s Manual P/N: 1003224-01...
  • Page 62 " 77 4D 78 4E 79 4F 80 50 & 81 51 82 52 83 53 84 54 85 55 SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 63: Functional Delays

    SL-Ping response time from remote modem 222 ms, modem to modem w/o repeaters Transmission Related Delays Delay from the end of transmission to the end of reception on the serial interface: Figure 14: Transmission Delay Appendix B SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 64: Transmission Delays When The Radio Tx Frequency Is Changed

    Transmission Delays without FEC-function (Forward Error Correction) Table 27. Number of Bytes Sent 1200 4800 9600 19200 38400 Delays are in milliseconds and with a 10% margin. Figure 15: 12.5 kHz Radio Channel without Error Correction Transmission Related Delays SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 65: Transmission Delays With Fec-Function (Forward Error Correction)

    Transmission Delays with FEC-function (Forward Error Correction) Table 28. Number of Bytes Sent 1200 4800 9600 19200 38400 Delays are in milliseconds and with a 10% margin. Figure 16: 12.5 kHz Radio Channel with Error Correction Transmission Related Delays SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 66: Transmission Delays Using A 25 Khz Radio Channel

    Transmission Delays without FEC Function (Forward Error Correction) Table 29. Number of Bytes Sent 1200 4800 9600 19200 38400 Delays are in milliseconds and with a 10% margin. Figure 17: 25 kHz Radio Channel without Error Correction Transmission Related Delays SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 67: Transmission Delays With Fec Function (Forward Error Correction)

    Transmission Delays with FEC Function (Forward Error Correction) Table 30. Number of Bytes Sent 1200 4800 9600 19200 38400 Delays are in milliseconds and with a 10% margin. Figure 18: 25 kHz Radio Channel with Error Correction Transmission Related Delays SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 68: Changing Parameters Using A Terminal Device

    Appendix C • • • • • • It is highly recommended to use TRU or SRL-35 display to change the radio settings. Changing parameters using SL Commands and Terminal mode is only suggested for advanced users. Changing Parameters Using a Terminal Device Changing the Settings 1.

  • Page 69: Restoring Factory Settings

    Factory settings are restored by selecting ”Y” (YES). By pressing “N” (NO) or any other button no changes is done and current settings will remain active. The modem will ask this question twice to make ensure that this is a valid command. Changing Parameters Using a Terminal Device SRL-35 Operator’s Manual P/N: 1003224-01...
  • Page 70 9600 bps, none parity, data length 8 bits and one (1) stop bit). Following this the radio modem will transmit the following message to the terminal (certain configuration settings might differ from the ones shown): ***** SRL-35 ***** FW: 06.18.x.xx / HW: SPL0005d+EPT / PV: 05.00 / IM: 05 /...

  • Page 71: Changing Frequency (Active Radio Channel Frequency)

    The frequency band limiting values are factory set and the user cannot change them. Changing Parameters Using a Terminal Device SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 72: Changing Reference Frequency

    473.00000 MHz Enter new frequency (MHz) or ESC to cancel > To get back to the main menu press ESC, ESC, ESC and then E for Exiting and saving. Changing Parameters Using a Terminal Device SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 73: Changing Channel Spacing

    Enter selection or ESC to previous menu > ESC Radio frequency setup --------------------- 1) Radio frequency 2) Channel spacing 12,5 kHz To get back to the main menu press ESC and then E for Exiting and saving. Changing Parameters Using a Terminal Device SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 74: Changing Radio Settings

    To get back to the main menu press ESC (and then E for Exiting and saving). The maximum useable sensitivity of the receiver is determined by the channel spacing (=radio interface data transfer speed) and also by error correction (utilised or not). Changing Parameters Using a Terminal Device SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 75: Changing Addressing Settings (Primary And Secondary Rx And Tx Addresses)

    (within allowed limits). Modification of all other primary and secondary transmitter and receiver addresses is done in similar way. Changing Parameters Using a Terminal Device SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 76: Changing Serial Port Settings (Port 1)

    The radio modem has one serial port, PORT 1 which complies with the RS-232 standard. PORT 2 is not in use and the settings of serial PORT 2 cannot be changed. Number 4 is pressed in the Main menu. Changing Parameters Using a Terminal Device SRL-35 Operator’s Manual P/N: 1003224-01...
  • Page 77 Serial port 1 Settings -------------- 1) Port status 2) Data speed 19200 bit/s 3) Data bits 8 bit data 4) Parity bits None parity 5) Stop bits 1 stop bit Changing Parameters Using a Terminal Device SRL-35 Operator’s Manual P/N: 1003224-01...
  • Page 78 5) Stop bits 2 stop bits Enter selection or ESC to previous menu > To get back to the main menu press ESC (and then E for Exiting and saving). Changing Parameters Using a Terminal Device SRL-35 Operator’s Manual P/N: 1003224-01...
  • Page 79 3) Data bits 8 bit data 4) Parity bits None parity 5) Stop bits 1 stop bit ***** SRL-35 ***** FW: 06.18.x.xx / HW: SPL0005d+EPT / PV: 05.00 / IM: 05 / S/N: YYMMxxxx ------------------------------------------------------------------------------- Current settings ---------------- 1) Radio frequency TX: 468.50000 MHz / RX: 437.00000 MHz /...

  • Page 80: Modification Of Handshaking Functions

    Serial ports 1 and 2 Handshaking -------------------------------- 1) CTS line property TX buffer state 2) CD line property Data on channel 3) RTS line property Ignored 4) Pause length 3 bytes Changing Parameters Using a Terminal Device SRL-35 Operator’s Manual P/N: 1003224-01...
  • Page 81 Now all of the modifications of the example have been performed and the new values are displayed on the menu as follows: ***** SRL-35 ***** FW: 06.18.x.xx / HW: SPL0005d+EPT / PV: 05.00 / IM: 05 / /N: YYMMxxxx -------------------------------------------------------------------------------...

  • Page 82: Special Functions

    The settings that the modem was delivered from the factory are called “factory settings”. Selecting main menu selection “A” can restore factory settings. Enter selection >A Restore factory settings ------------------------ Do you want to restore factory settings? (Y/N)> Changing Parameters Using a Terminal Device SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 83: Info

    MUST NOT be connected to ground (GND). SL-command is properly recognized also in the case when the command string is terminated in <CR> (=ASCII character no. 13, Carriage Return, Changing Parameters Using the SL Commands SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 84: Frequency

    S = Single Channel D = Dual Channel R = Reverse Dual Channel Note! Use this command only, if the setup of the frequency bands matches the Dual Channel operation. Changing Parameters Using the SL Commands SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 85: Addressing

    Get secondary transmit address (TX2) and receive address (RX2) (response ‘xxxx;yyyy’) SL#A=xxxx,yyyy,ww Set addresses to values TX1=xxxx TX2=yyyy RX1=wwww RX2=zzzz ww,zzzz SL#A? Get all addresses (response ´xxxx, yyyy, wwww, zzzz) Changing Parameters Using the SL Commands SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 86: Radio Parameters

    • “3” if the mode is TRIMTALK GMSK, RX fitted to Pacific Crest transmitters • “4” if the mode is TRIMTALK GMSK, RX fitted to Trimble transmitters • “5” if the mode is PCC-FST Changing Parameters Using the SL Commands SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 87: Other Functions

    Note, SL-ping is a very short message so it may not give accurate results from the link condition. Even if the responses are good, channel interference may cause problems with longer data messages. Changing Parameters Using the SL Commands SRL-35 Operator’s Manual P/N: 1003224-01...

  • Page 88: Regulatory

    • FCC CFR47 part 90 Product Conformity The SRL-35 radio modem is in compliance with the essential requirements (radio performance, electromagnetic compatibility and electrical safety) and other relevant provisions of Directive 1999/5/EC. Therefore the equipment is labeled with the following CE-marking. The notification sign informs users that the operating frequency range of the device is not harmonized throughout the market area, and the local spectrum authority should be contacted before the usage of the radio modem is used.

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