SD-170E RF Data User Manual July 2012
Contents
1. D Type Function Description Signal Type Input Pin No Output 1 Data modulation IN Signal is directly injected to MOD through data Analog signal I P Tx Mod low pass filter without pre emphasis 1KHz audio at 60 peak system deviation input level 100 to 120mVrms 2 Data unfiltered OUT Discriminator audio from the SD 170E This is Analog signal O P RX disc the unprocessed AF signal prior to tone 1KHz audio at 60 filtering and de emphasis peak system deviation produces 200 to 300mVrms 3 PTT In Signal from the external device to key the TTL level UP Tx Key SD 170 transmitter OV Tx This line has an internal pull up resistor to 5V o c Rx Pulling the line to OV turns on the transmitter Note If you installed option modem board RS 232 level option you can select RS 232 signal level by 12V Tx Jumper CON407 on the digital board 12V Rx 4 Power B power connection DC 12V nominal 5 Serial Data Out Serial data output for radio control or program TTL level O P TXD It uses asynchronous data format 6 Busy Logic level output from SD 170 to indicate TTL level O P CD whether a carrier is present or not OV carrier Note If you installed an option modem 5V no carrier board you can select RS 232 signal level by Jumper CON407 on the digital RS 232 level option board 12V carrier 12V no carrier 7 Microphone filtered This signal is injected to th2. 0x66 0x00 1 Channel 0x66 0x00 From Radio 0x01 2 Channel 0x66 0x01 To Pc 0x02 3 Channel Only for Unmute Channel OxOf 16 Channel Correct Call Channel 0x65 t occurs when Scan Delete command comes except for Busy Correct Call Error t occurs when PTT key is pushed except for Message Busy Correct Call t occurs when channel change command exists during Scanning Control of 0x6a 0x00 GPS Power Off 0x6a 0x00 GPS Power 0x01 GPS Power On 0x6a 0x01 GPS 0x63 0x00 GPS Data Disable 0x63 0x00 0x01 Release GPS Data 0x63 0x01 mode Control of GPS Data Dee 0x02 Release GPS Data 0x63 0x02 to Modem 0x75 0x78 Enable test data 0x75 0x78 radii nee 0x79 Disable testdata 0x75 0x79 GMSK Ox7a 0x00 Disable Ox7a 0x00 Modem 0x01 Enable 0x7a 0x01 Ox7c 0x00 Disable Ox7c 0x00 nis ES 0x01 Enable Mark data Ox7c 0x01 mode Ox7e 0x00 Disable Ox7e 0x00 0x01 Enable Space data 0x7e 0x01 RSSI 0x41 0x00 None 0x41 0x00 Data SQLC Data Squelch 0x42 0x00 None 0x42 0x00 UP Squelch 0x43 0x00 None 0x43 0x00 Down Receive Command amp data Mode Transmit Transmit data BYTE1 Check sum BYTE2 Command Transmit Command data BYTEO 1 Process Complete Oxaa ACK Commands 0x55 NACK Note This command is return signal for receiving command If Byte2 and sum of Byt
3. Asynchronous Serial Data Transfer Baud Rate 4 800 bit sec Data Bit 8bit Non Parity Stop Bit 1bit MSB first transmission Each serial command is consist of 3 bytes 1st byte is command and 2na is data required by command and 3 is check sum to decide validity of total contents Byte0 ST 1st Byte Command SP Byte1 ST 2na Byte Data SP Byte2 ST 3 Byte Check Sum SP 12 Data Protocol Protocol for input Serial command Protocol of data transmission from external equipment or device PC to radio External equipment or device Protocol for output data Input serial command Receive response Protocol of data transmission from radio to external equipment or device PC External equipment or device Serial Commands Transmit Command amp data Receive Data Response Radio Radio Output Data with command Output Data with command Mode Transmit Transmit data BYTE Check sum BYTE2 Command Transmit Command data BYTEO 1 Channel Change 0x64 0x Current channel 0x64 Channel 2 0x61 R 0x72 Rx mode 0x61 0x72 STE Mode pend T 0x74 TX mode 0x61 0x74 3 0x62 F 0x46 Scan Stop 0x62 0x46 Scan From PC S 0x73 Scan Start 0x62 0x73 Mode To Radio O 0x4F Scan Delete 0x62 Ox4F 13
4. Nous d clarons que le produit r f renc ci dessus satisfait aux exigences R amp TTE 1999 5 EC qui lui sont applicables Nous d clarons que le produit r f renc ci dessus satisfait aux exigences R amp TTE 1999 5 EC qui lui sont applicables 23
5. SD 170E RF Data User Manual July 2012 V Maxon www maxon com au australia About your SD 170E Series Data Radio The SD 170E Series of RF Link Modules utilize the latest technology in their designs and manufacturing SD 170E models are Phase Lock Loop Synthesizer PLL microprocessor controlled and offers 1 5 watt Low High programmable output power with 16 channel capability Multiple functions including 1200 to 9600 baud rates AC and or DC audio coupling GMSK FFSK and FSK modulation are standard in these fully programmable RF Link Module units Programmable sub audio squelch system CTCSS amp DCS and two tone squelch system are added to the signal level detect squelch system RSSI GPS Data handling is provided to interface and control an internal GPS receiver To assure satisfaction from the radio we urge you to thoroughly read the operation and function information in this manual before operating your SD 171E SD 174E Applications of some of the functions described in this manual are determined by the system you use Your dealer will program your radio so that you have the greatest number of functions possible relative to your needs Should you have questions regarding the operation of the radio please consult your Dealer Specifications GENERAL Equipment Types ienaa e p Ett es Data radio Performance Specifications TIA EIA 603 ETS 300 113 Band te b mai E ER pi bed VHF SD 171E UHF SD 174E Channel Sp
6. 11 CMD_CLK Clock Input for Modem programming UP 12 MODEM SEL It Indicates modem type to Master MCU for programming O P 13 RX IN The FFSK MSK signal input for the receiver of modem IC UP 14 TX OUT The FFSK MSK signal output when the transmitter is OIP enabled 1 Serial_IN The Serial data to be transmitted is input to this pin VP 5 Serial OUT The recovered asynchronous serial data output from the OIP receiver 3 Busy To eliminate data loss according to buffer overrun of slave O P MCU s memory it indicates buffer status Connector 2 3 Carrier_Detect Handshake signal for RTS control mode It indicates OlP whether Slave MCU of modem has decoded data or not 5 PTT IN Handshake signal for RTS control mode It requests data uP transmission to Slave MCU of modem 6 PROGRAM It s reserved input for firmware upgrade I P 20 GMSK Modem Option board Connector Pin dy Input Function Description No No Output 1 VCC 6V to 12V Power Input VP 2 GND Ground 3 PTT Signal from the digital board to enable transmitter circuit of up modem board 4 TXD_EN It ensures that the radio has stabilized in transmission IP before the data is processed for modulation 5 TX_END To finish transmission it indicates memory buffer of Master OIP MCU of digital board is empty 6 MUTE Logic level input from digital board to indicate whether a 7 Busy carrier is pr
7. To overcome these problems and provide maximum flexibility an FFSK Fast Frequency Shift Keying internal option board can be used COMMUNICATION BETWEEN DTE AND OPTION BOARD Our internal modem options consist of Slave MCU Modem IC and extra circuitry These option boards directly communicate with DTE Data Terminal Equipment to send and receive meaningful data through the DB 15 connector on the digital board of the SD 170E These modems are designed to accept RS232 serial data format and are also capable of high speed wireless data transmission between two or more devices More detailed information for the modem option boards is given in the technical manual for the ACC 513E 514E Your dealer will help you define a TX On Off delay time RX On delay time Baud Rate Modem Enabled Modem Baud Rate Data flow control and Test Mode Table for modem speed Channel Space DTE Baud Rate Modem Baud Rate 1200 1200 Narrow 12 5KHz 2400 2400 1200 1200 Standard 25KHz 2400 2400 4800 4800 Table 1 Available Baud rate for FFSK modem 18 Channel Space DTE Baud Rate Modem Baud Rate Narrow 12 5KHz 4800 4800 4800 4800 Standard 25KHz 9600 9600 Table 2 Available Baud rate for GMSK modem Transmission GPS Data through Modem The SD 170E supports GPS data handling That may help your implementation for a system related to GPS If it is not enough for your application received position
8. Sinad ssssssssss Standard B W 118 dBm Narrow B W 117 dBm Nom Condition Standard B W 115 dBm Narrow B W 114 dBm Extreme Condition Amplitude Characteristic 0c ccc eee eee eee ees lt 3 dB Adjacent Channel Selectivity 25 kHz Channel Spacing 0 ccccccceeceeeeeeeteeeeeeeeseeees 12 5 kHz Channel Spacing sssssesss Spurious Response Rejection ssssssssse Image Response ssssmHH He IF Response 5o eter ete ttal da d Others ost t e te etu ede dee tut Intermodulation Response Rejection X25 kHz 50 KHZ eniinn ape niana e E N a RaR 50 kHz 100 KHZ 0 Conducted Spurious Emission Nominal Conditions 9KHz 1 GHZ ina a T T GHz 4 GHz rere neben et B RO EROS RX Spurious Emissions Radiated Nominal Conditions 9 KHz d GHz eee nete ee tees 1 GHz 12 75 GHz ne e hien etes AF Distortion e dr e e eu RX Hum amp Noise 25 0 kHz CP ect bem E phat e ree e utis 12 5 kHz CP rtt Pre delia ees Receiver Response Time c cccceceeceeeeeesesteeeeees Squelch Opening Range eerren Squelch Closing Range Hysteresis Squelch Attack Time RF Level at Threshold RF Level at Threshold 20 dB ssessssss Squelch Decay Time sssssssseee Antenna Socket Input Match sssssee
9. acings sssssss 25 kHz 12 5 kHz programmable RF Output Power ssssssse m 1 watt 5 watt programmable Modulation Type sssssse F2D F3E Intermediate Frequency sssse 45 1 MHz amp 455 kHz Number of Channels sssssssme 16 Frequency Source eieren eeen Synthesizer Operation Rating ssssssem Intermittent 90 5 5 Standby RX TX Power Supply s esee ebat De elas Ext Power Supply 12 VDC Nominal 9V 18 0V DC EXTREME Temperature Range Storage 2h oram ad LE Led from 40 C to 80 C Operating isch 2 rette ae wid Une entes from 30 C to 60 C Current Consumption Standby Muted ssssssssssem lt 65mA Transmit 5 Watt RF power a e lt 2 0A Transmit 1 Watt RF power a e ereere lt 1 0A Frequency Bands RX TX VHF V2146 000 174 000MHz 146 000 174 000 MHz UHF U2450 000 490 000 MHz 450 000 490 000 MHz Lock Time etit t rt bete Porta b 10 mS TX to RX attack time eraen aa a a iaa i lt 20 mS No Power Saving RX to TX attack time eana a lt 20 mS Dimensions Hem 118mm H x 63 mm W x 35 mm D 266 5 grams TRANSMITTER Specification Carrier POWER riaan eite eth met eda Nom Max Min n REEERE PE EA PERERA T ate on tbh E T aa Et En eu 5W lt 6W gt 4 5W m LL 1W 1 5W gt 0 8W Sustained Transmission ssennness Nominal conditions Time 5 10 30Sec Power gt 90
10. continuous PTT signal input is required If you use Tx serial command for transmission normally it s released by Rx serial command If RF activity is present it will not be illuminated if the radio indicates a clear channel When the channel is clear input the PTT signal or Tx serial command and transmit data or audio Remove the PTT signal or input Rx serial command when you have finished transmission CAUTION Operation of the transmitter without a proper antenna installed may result in permanent damage to the radio Receive When you have finished transmission remove the PTT signal or input Rx serial command You will receive data from another radio or hear another person talking from the connected external speaker 10 Scan modes Scanning is a dealer programmable feature that allows you to monitor a number of channels Your dealer will help you define a scanning mode and your channel scan list Channel scan Once the scan list has been established initiate scan by serial commands If a conversation is detected on any of the channels in the scan list the radio will stop on that channel and you will be able to hear the conversation At that time busy channel data is sent to external equipment or device through serial command So you can identify busy channel data as decoding of received serial command from your radio in the external equipment or device Normally if you try to transmit during scanning the transmi
11. data from the GPS module placed in an SD 170E can be reprocessed by your own application The ACC 515E is a GPS module for the SD 170E which releases 11 different output data according to the NMEA 0183 format which can be selected by you the available data should be processed by your application Received data from the ACC 515E will be released via the DB 15 connector of the SD 170E and or transmitted to another system through an installed modem More detailed information for the GPS option board is given in the technical manual for the ACC 515E 19 Option board pin out chart FFSK Modem Option board Connector Pin a Input Function Description No No Output 1 VCC 6V to 12V Power Input VP 2 GND Ground 3 PTT Signal from the digital board to transmit data key the SD up 170 transmitter 4 TXD_EN It ensures that the radio has stabilized in transmission 7 before the data is processed for modulation 5 TX END To finish transmission it indicates memory buffer of Master p MCU of digital board is empty 6 MUTE Logic level input from digital board to indicate whether a 7 Busy carrier is present or not Connector 1 7 MODEM EN Modem Enable input I P 8 POWER_SAVE Power save input for modem board VP 9 CMD EN It indicates that command for Modem programming is 7 effective 10 CMD IN OUT Data Input and Output for Modem programming I P O P
12. e MOD at the point Audio UP audio IN through audio amplification pre emphasis and 1KHz audio at 60 high pass filtering where sub audio tone is peak system deviation mixed with audio input level 6 to 8Vrms 8 Serial data IN Serial command or data input for radio control TTL level I P RXD or program It uses asynchronous data format 9 Speaker filtered OUT Audio output from the audio amplifier Audio O P It s filtered by tone filter de emphasis circuit 1KHz audio at 60 peak system deviation produces Nominal 1Vrms 822 10 Serial data IN for The Serial data to be transmitted is input to RS 232 level I P option modem this pin It s only available when option modem board is installed Inputted data are modulated by modem IC and then injected to MOD It uses asynchronous data format 11 Serial data Out for The recovered asynchronous serial data RS 232 level O P option modem output from the receiver It s only available when option modem board is installed It uses asynchronous data format 12 Serial data busy for To eliminate data loss according to buffer RS 232 level O P option modem reserved overrun of slave MCU s memory it indicates buffer status 16 13 GPS data input Data input for initial setting of GPS module TTL level It follows NMEA 0183 format and uses asynchronous data format UP 14 DGPS data input Data input for DGPS Correction of GPS TTL level I P module It fo
13. e0 and Byte1 among received data are same Radio would send ACK data and execute command If not Radio sends Nack data User would go into next step if receives ACK data If user receives Nack data user should send command again example If user changes from 1st Channel to 2 Channel 14 User should send Channel Change Command 0x64 0x02 0x64 0x2 to Radio If Byte2 and sum of Byte0 and Byte1 among received data are same Radio sends ACK data to user and changes to 2 channel If not Radio would send Nack data Audible alert tones Your SD 170E series data radio has a sophisticated microprocessor control which provides a range of audible tone If you connect the Speaker filtered OUT Pin 9 of DB 15 connector to an external speaker you can hear audible tones at the following conditions Attempt to transmit on a channel that is already in use when busy channel lockout has been programmed into the radio Transmission time has exceeded time out timer programmed length When the other group or people finished transmission using repeater See the status audible alert tones chart for full details STATUS DESCRIPTION AUDIBLE TONE Busy Channel lockout Single Beep Tone 800Hz WARNING Before 5S T O T Single Beep Tone 800Hz Transmit Hang on time Single Beep Tone 800Hz ERROR PLL Unlock Error Single Beep Tone 640Hz 15 DB 15 PIN descriptions with input output level
14. esent or not Connector 1 7 MODEM EN Modem Enable input I P 8 POWER_SAVE Power save input for modem board VP 9 CMD EN It indicates that command for Modem programming is uP effective 10 CMD IN OUT Data Input and Output for Modem programming I P O P 11 CMD CLK Clock Input for Modem programming UP 12 MODEM SEL It Indicates modem type to Master MCU for programming O P 13 RX_IN The GMSK signal input for the receiver of modem IC UP 14 TX OUT The GMSK filtered Tx output signal O P 1 Serial_IN The Serial data to be transmitted is input to this pin I P 2 Serial OUT The recovered asynchronous serial data output from the OIP receiver 3 Busy To eliminate data loss according to buffer overrun of slave OIP MCU s memory it indicates buffer status Connector 2 Carrier Detect Handshake signal for RTS control mode It indicates OIP whether Slave MCU of modem has decoded data or not 5 PTT_IN Handshake signal for RTS control mode It requests data 7 transmission to Slave MCU of modem 6 PROGRAM It s reserved input for firmware upgrade I P 21 GPS Option board Pin ae Input Function Description No Output 1 VCC 6V to 12V Power Input I P 2 VBAT Backup Power Input 3 3V UP 3 ENABLE GPS Data Out Enable VP 4 PSAVE GPS Power Enable amp Power save input for GPS I P 5 GND Ground 6 GPS_OUT Position Data Output O P 7 DGPS IN DGPS Correction Data Input VP 8 GPS IN Initial Setti
15. gt 85 gt 80 Frequency Emori aA mme lt 0 75 kHz Nominal condition for UHF 5 0 ppm Extreme condition for UHF Frequency Deviation 25 kHz Channel Spacing Peak 5 0 Min x3 8KHz 12 5 kHz Channel Spacing Peak 2 5 Min x1 9KHz Audio Frequency Response Within 1 3dB of 6dB octave 300 Hz to 2 55 kHz for 12 5 kHz C S 300 Hz to 3 0 kHz for 25 kHz C S Adjacent Channel Power 25 kHz toed lait eek ante ies ne lt 70 dBc Nominal Condition lt 65 dBc Extreme Condition 12 5 kHz inca E RE nius 60 dBc Nominal Condition 55 dBc Extreme Condition Conducted Spurious Emission ssssssss 36 dBm 1GHz 30 dBm 1GHz Modulation Sensitivity sssssse 100mV RMS 60 Peak Dev Hum amp Noise 25 kHz Channel Spacing ssssesess gt 40 dB with no PSOPH 12 5 kHz Channel Spacing sssssssss gt 40 dB with PSOPH Modulation Symmetry sssssssnese 10 Peak Dev 1 kHz input for nominal dev 20dB Load Stability cepa dad ena ts No osc at 10 1 VSWR all phase angles and suitable antenna No destroy at 20 1 all phase angle Peak Deviation Range Adjustment 1 kHz Nom Dev 20dB 25 kHz Channel Spacing ssssees Min 3 5 Max 6 0KHz 12 5 kHz Channel Spacing ssssssesess Min 1 5 Max 4 0KHz RECEIVER Specification Sensitivity 12dB
16. llows NMEA 0183 format and uses asynchronous data format 15 GPS data output Position data output from the GPS module It TTL level O P follows NMEA 0183 format and uses asynchronous data format When building a cable to interface with the SD 170E the ground connection is made by grounding the outer shell of the DB 15 connector Make sure the securing screws are tight on the connector when installing it to the unit 17 Modem option for data communication DESCRIPTION The ACC 513E and ACC 514E are internal option modems which are applied to the SD 170E series to increase capability for data applications The goal of an internal modem is to improve the efficiency for data transmission and provide maximum flexibility for user applications The most obvious method of increasing the data efficiency is to maximize the data signaling speed in the limited channel bandwidth But FSK called direct FM modulation has a very wide transmission bandwidth requirement To solve this problem a GMSK Gaussian Filtered Minimum Shift Keying internal option board can be used Generally data has a wider bandwidth than audio So direct application of data is not matched with an audio system and its application For instance if sub audio Tone SQ system applied to a data application its frequency conflicts with that of sub audio Moreover the inputted data is filtered by the audio filter circuit resulting in broken data transmission
17. ng Data Input UP 9 5V 5V Power Input VP Compatible accessory list ACC 513E ACC 514E ACC 515E ACC 516E ACC 160E ACC 916E ACC 2016E 9600 baud GMSK modem 4800 baud FFSK modem GPS receiver PCB Interface used to separate digital and RF board for alignment GPS antenna Personality programming software Individual USB programming cable 22 SD170E Series This product is marked with 0678 0 in accordance with the Class II product requirement specified in the R amp TTE Directive 1999 5 EC This equipment is intended for use in Austria Belgium Bulgaria Cyprus Czech Republic Denmark Estonia Finland France Germany Greece Hungary Iceland Ireland Italy Latvia Liechtenstein Lithuania Luxembourg Malta Netherlands Norway Poland Portugal Romania Slovakia Slovenia Spain Sweden Switzerland amp United Kingdom and requires authorization individual license for use We hereby declare that the above named product is in conformity to all the essential requirements of Directive 1999 5 EC Con la presente si dichiara che il prodotto sopra menzionato conforme ai requisiti essenziali della Direttiva 1999 5 CE Declaramos que el producto mencionado m s arriba cumple todos los requisitos esenciales de la Directiva 1999 5 CE Wir m chten hiermit bekanntgeben da das oben genannte Produkt in bereinstimmung mit allen erforderlichen Bed rfnissen der 1999 5 EC Direktive seht
18. ntenna to the radio by turning the antenna cable clockwise into the receptacle on left of radio when looking at front of radio Powering the data radio Your data radio accepts many sources of DC power to permit more versatile use This radio operates from 9 0V to 18V DC and standard voltage for test is 12V DC SD 170E Series Operation Channel select SCAN Your radio s channel can be selected by inner DIP S W or serial command inputted from external control system To change channel by inner DIP S W you should open the upper cover and then look for the DIP S W on the digital board of the bottom cover Once located change the DIP S W to select wanted channel according to channel dip switch chart To use a serial command for channel selection it should be inputted by external equipment or device ex Personal computer through Pin 8 of DB 15 connector See the message format for serial command for full details If your radio has been programmed the channel scan you must enter the scan mode by serial command Transmit The transmission will be made by various inputs such as PTT signal Pin 3 of DB 15 connector TX serial command and Serial data input Pin 10 of DB 15 connector This input is only available when a modem option board is installed TTL level is used as PTT signal and is active low If you installed an option modem board you can use RS 232 level as a PTT signal instead of TTL level To maintain transmission
19. or injury to personnel and will invalidate warranty The outlet must not be obstructed and must be easily accessible at all times Never attempt to disassemble modify or repair the unit unless the work is carried out by a Maxon approved Dealer Incorrect assembly modification or repair may cause irreparable damage to your unit and will invalidate warranty For service or repair always return your radio to an authorized Maxon Dealer Unpacking information Remove and carefully inspect the contents of your package s for the following items Radio User manual If any items are missing please contact the dealer from which you purchased the radios or contact us at phone number 913 859 9515 or if call within the U S toll free at 800 993 9476 SD 171 SD 174 Features Synthesized Operation with 16 channel capability 1 5 Watt programmable output power Programmable 12 5 25KHz channel spacing Channel scan Busy channel lockout Tx Time out timer Power Save Marked Idle Tx Delay Data transmission and reception through GMSK modem Data transmission and reception through FFSK modem Support transmission of global position data Description of radio components Antenna connector 6 DB 15 connector 6 GPS Antenna connector option DIP S W Jumper selector Exterior View 2 e SW401 CC E Q Digital Board Antenna installation Fasten the a
20. se L O Frequency Temperature Stability L O Frequency Aging Rate eee gt 70 dB Nom gt 60 dB Extreme Condition gt 60 dB Nom gt 50 dB Extreme Condition 70 dB 100 kHz 4 GHz 70 dB 70 dB 70 dB 70 dB 70 dB lt 57 dBm lt 47 dBm lt 57 dBm lt 47 dBm lt 3 Nom lt 10 Extreme condition lt 40 dB No PSOPH lt 40 dB with PSOPH lt 16 mS 113dBm 2 Nom Condition 116dBm x2 Nom Condition 40 mS 30 mS 5 mS Min 20 mS Max gt 10 dB Return Loss 1st lt 5 ppm 2nd 15 ppm from 30 to 60 C 2 ppm year Safety Information WARNING gt gt DO NOT hold the radio in such a manner that the antenna is next to or touching exposed parts of the body while transmitting DO NOT allow children to operate transmitter equipped radio equipment CAUTION gt DO NOT operate the radio near unshielded electrical blasting caps or in an explosive atmosphere unless it is a type especially designed and qualified for such use NEVER use the radio in an aircraft NEVER use the radio near to sensitive medical equipment or in areas where instructed not to do so e g Petrol filling stations When used in a vehicle do not mount the radio unit on or near the Airbag or Airbag activation device The use of an accessory not recommended or supplied by Maxon may cause damage to equipment
21. ssion will be made on the channel that the call was received during the programmable scan delay time The scan delay time is the amount of time the radio will stay on that channel once activity has ceased Dealer programming of 4 7 seconds is typical The radio will resume scanning once the scan delay time has expired and will continue to scan until the serial command for scan stop is inputted by external equipment After the scan resumes if a transmission is made the radio will transmit on the selected priority channel This feature is similar to priority scan TX except for selection of priority channel You can assign a priority channel by inner dip switch only Scan channel delete To temporarily delete a channel from the scan list simply input the serial command for scan deletion to the radio while scanning and stopped on the channel to be deleted This will temporarily remove that channel from the scan list until the scan is closed or the radio s power is reset CTCSS DCS Scanning To help to block out unwanted calls to your radio the SD 170E series can be programmed by your dealer to scan for tones 11 Channel dip switch chart Serial m camet w T mam uunr am Mu URRE WEAF apua Mag REED MUAF maggi mapa mmm mmmm a SW401 command Serial RX TX Data Format CHANNEL SELECT SWITCH
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