Qual Tron QTIMIDSMBMCDT MCDT TRANSMITTER User Manual
Qual-Tron, Inc. MCDT TRANSMITTER Users Manual
Users Manual
9409 E. 55th Pl. S. • Tulsa, OK 74145 • Ph: (918) 622-7052 • Fax: (918) 664-8557 MCDT INSTRUCTION MANUAL MCDT Multi-Channel Data Transceiver P/N 10D1067 All rights reserved. No part of this book may be reproduced or utilized in any form or by any means, electronic or mechanical, without the prior written permission of Qual-Tron, Inc. QTI Form #: 30Z0250 Page 1 of 15 Revision: D Effective Date: 1 August 2010 MCDT Instruction Manual Table of Contents Section 1: MCDT Multi-Channel Data Transceiver ............................................................ 3 Description .................................................................................................................................................. 3 Model Numbers (9 models) ......................................................................................................................... 3 Design Features ........................................................................................................................................... 4 Physical Characteristics ............................................................................................................................... 4 Section 2: MCDT Operation................................................................................................... 6 Receiving/Transmitting ............................................................................................................................... 6 ITEMS REQUIRED ................................................................................................................................ 6 SETUP ..................................................................................................................................................... 6 RF Link........................................................................................................................................................ 6 Section 3: Serial Interface ....................................................................................................... 7 Message Serial Format ................................................................................................................................ 7 Command List ............................................................................................................................................. 9 CHECKSUM: .............................................................................................................................................. 13 Section 4: Maintenance ........................................................................................................... 14 OPERATOR MAINTENANCE: ............................................................................................................. 14 DEPOT MAINTENANCE: ..................................................................................................................... 14 EQUIPMENT STORAGE: ...................................................................................................................... 14 WARRANTY: ......................................................................................................................................... 14 RETURN PROCEDURES: ..................................................................................................................... 14 TROUBLESHOOTING GUIDE: ............................................................................................................ 14 Section 5: Frequency/Channel Calculations ......................................................................... 15 Channel to Frequency Calculation .............................................................................................................. 15 Frequency to Channel Calculation .............................................................................................................. 15 Section 6: FCC RF Exposure Limits ..................................................................................... 15 HISTORY Revision Changes O/I Original Issue General Corrections General Corrections New shields; different connector pin outs for Receiver/Transmitter differences. Removed battery references in “Equipment Storage” in Section 4 Added model numbers. Corrected the description of pins 4 & 5 on the RS485 connection to match RS-485 standards. Pin 4 is B+ and Pin 5 is AAdded RS-485 schematic. Added “CMB” and “PSH 2” commands. QTI Form #: 30Z0250 Page 2 of 15 Date 04/13/2009 03/02/2010 04/08/2010 06/17/2010 8/01/2010 Revision: D Effective Date: 1 August 2010 Section 1: MCDT Multi-Channel Data Transceiver Description The Multi-Channel Data Transceiver (MCDT) is an OEM modular modem for users who need lowpower and small size with serial communications. The MCDT can be constructed as a transmitter, a receiver or as a transceiver. The MCDT is equipped with a RS-485 communications port which is a simple, low-cost interface, utilizing few components and allows for daisy-chaining multiple receivers. The MCDT is capable of transmitting or receiving SEIWG-005 data messages which includes a distinct ID and a status code, over a selectable frequency range. This frequency is selectable via the synthesizer control circuit, providing a selection of up to 1920 RF channels, depending on the model’s frequency range. The MCDT comes in Low-Band, Mid-Band, and High-Band models, having the following frequency ranges: Low Band Channel 001 = 138.025 MHz Channel 600 = 153.000 MHz Channel Spacing: 25 kHz Medium Band Channel 001 = 154.005 MHz Channel 1600 = 162.000 MHz Channel Spacing: 5 kHz High Band Channel 001 = 162.00625 MHz Channel 1920 = 174.000 MHz Channel Spacing: 6.25 kHz Model Numbers (9 models) 10D1067-RL, -RM, -RH 10D1067-TL, -TM, -TH 10D1067-XL, -XM, -XH MCDT Receiver only, low, mid, or high band MCDT Transmitter only, low, mid, or high band MCDT Transceiver, low, mid, or high band Antenna: MMCX plug 50 ohm (J1) (10D1984 MMCX to TNC 3” cable available) Power Supply: 4.0 VDC to 16.5 VDC nominal 4.0 VDC to 16.5 VDC 1W Transmit 4.4 VDC to 16.5 VDC 2W Transmit 3.5 VDC to 16.5 VDC Receive MCDT Receiver Connections: J2 - Header Pin (10-pin TFM-105) 1, 2 8, 9, 10 QTI Form #: 30Z0250 Receiver Only Function Transmitter & Transceiver Function Vin [Input] 3.5 to 16.5 VDC Not Used RS485 – B(+) [I/O] RS485 – A(-) [I/O] Same as pins 1,2 General I/O GND Vin [Input] 4.0 to 16.5 VDC Transmit Drive [Output] Active low RS485 – B(+) [I/O] RS485 – A(-) [I/O] VCC [Out] 5.4VDC 50mA/3A General I/O GND Page 3 of 15 Revision: D Effective Date: 1 August 2010 Current Draw Approximations: Mode Current Sleep 20uA Active 5.0mA Transmission(1Watt) 57ms @ 1.5A Transmission(2Watt) 57ms @ 3A Receiver On 11 to 12.6mA Receiver Active 16.9mA Comments MCDT wakes up on RS485 bus activity Receiver Off / Microprocessor On Pulse Current Provided by Super Caps Pulse Current Provided by Super Caps Receiver On – Waiting for valid RF message RF message received – Microprocessor On Design Features ID Code Selection 000-999 for EMIDS, 000-063 for all other formats Directional, sensor fault, low battery, tamper, and test status codes for EMIDS format Able to receive and transmit MIDS 20-bit or MMIDS / EMIDS 29-bit messages MMCX antenna port matched to 50 ohms Conformal-coated and shielded circuit assembly Physical Characteristics The MCDT is light weight and comes in a compact size. This makes it ideal for mobile applications as well as applications with tight space constraints. Weight Height Length Width Receiver Only 62 g (2.2 oz) 1.38 cm (0.544 in) Transmitter Only Transceiver 89 g (3.1oz) 104 g (3.7oz) 2.36 cm (0.929 in) 5.60 cm (2.206 in) 5.10 cm (2.006 in) The shielding on the MCDT has been designed in a way to promote easy PCB integration. The top of the MCDT is equipped with three alignment tabs that can be used as standoffs. The alignment tabs are delivered down on the transmitter and can be bent upward if needed. By utilizing these pins and a proper connector you are able to design a board that connects to the MCDT. Dimensions for the transmitter, transceiver and receiver MCDTs are shown in figures 1 & 2 below. The receiver MCDT has identical dimensions except for height. Connections to the MCDT can be made by connecting to the J2 header. The header as used on the MCDT is SAMTEC part TFM-105-XX-X-D. The recommended mate is SFM-105-T2-L-D-P from SAMTEC. These are 2 x 5 pin headers with a 50 mil pitch. See Connections table above to determine pin outs. The serial RS485 I/O driver IC used by Qual-tron is a MAXIM part. The part number is MAX3471EUA+. If the customer also includes this IC from MAXIM in their design, connect pin 6 of the IC to pin 4 on J2 and connect pin 7 to pin 5 on J2. Note: Sometimes RS485 devices are marked with the polarity reversed from normal RS485 standards. If a new or unknown device cannot communicate, try reversing the differential lines usually marked A & B. QTI Form #: 30Z0250 Page 4 of 15 Revision: D Effective Date: 1 August 2010 Fig. 1 MCDT Transmitter/Transceiver Fig. 2 MCDT Receiver QTI Form #: 30Z0250 Page 5 of 15 Revision: D Effective Date: 1 August 2010 Section 2: MCDT Operation Using the settings provided in Section 3: Serial Interface, open a serial communication program such as HyperTerminal and supply power to the MCDT. A USB to RS485 cable is available that can connect directly to the MCDT. The USB port from a computer is capable of powering the “receiver only” version. However, it is not recommended that the MCDT “transmitter only” and transceiver units be powered from the USB port. The current draw during the initial super-capacitor charging period and during transmission may cause damage to the cable and/or computer. Start Up When the MCDT is initially powered on, a “BL” output string is sent to indicate the opportunity for entering the “Boot Loader” mode. The ability to enter the boot loader mode will timeout after 1 second. The next serial output that is sent after the BL timeout is the reason for the reset or restart. It can be one of the following messages: "PWR-ON RST", "EXT RST PIN", "COP RST", "ILLEGAL OP RST", "ICG RST", "LVD RST", or "UNKNOWN RST". After the reset message, the version information is sent “MCDT 028A 003G ” for example. (See the VER command for the description). NOTE: The “BL” (Boot Loader) response provides the opportunity to enter the programming mode for one (1) second at start up. Sending a “P” (no “ ”) will enter the firmware upgrade mode and could cause the firmware to be erased. Therefore, the user is advised not to send any characters to the unit, especially not a character “P” followed by a character “Y” to the MCDT before the version information is received. Receiving/Transmitting During normal operation, the MCDT is capable of sending and receiving SEIWG-005 messages via the serial port and via radio frequency. The MCDT assumes a low-power shut-down mode to conserve power when not in use. ITEMS REQUIRED 1. 2. 3. 4. DC Power Source: 4.0 to 16.5 Volts Personal Computer with USB or RS232 port 10-pin connector to RS-485 USB cable (QTI part# 10D1978) Serial Communications Program such as HyperTerminal SETUP 1. Set the Channel. (Default CHR 001) 2. Enable receiver, if desired. Transmit is always enabled. (Default RCV 1) 3. Enable Push to send messages out serial port, or disable to poll for messages. (Default PSH 1) RF Link The operational range of the RF link is dependent upon various conditions. The high frequency of the RF link works best under line of sight conditions. RF range may vary from 0.5 kilometer to 5 kilometers for open areas using the 1-Watt setting. Greater range may be expected using the 2-Watt setting. QTI Form #: 30Z0250 Page 6 of 15 Revision: D Effective Date: 1 August 2010 NOTE: Elevating an antenna will increase transmission and/or reception range significantly. The use of relays/repeaters can also be used to increase transmission ranges. Also transmitting and receiving antennas should both point in the same direction (typically up) so they have the same polarization. Section 3: Serial Interface The MCDT defaults to a low-power shut down mode with the receiver still operating (if installed). If push is enabled (“PSH 1”), the MCDT will send the message via the serial port upon receiving an RF message, and then return to shut-down immediately. The user may initiate serial communication by sending the MCDT two carriage returns. This is to allow the MCDT time to wake-up from the powerdown mode. After 1 minute of inactivity on the serial port, the MCDT returns to low-power shut down mode. If the user has disabled the PUSH setting (“PSH 0”), and a new message is received, the MCDT will send its RS485 ID. See the SID command. This is used to wake-up the user’s application processor. Once awake the user can poll to get the new message. See the NEW command. If the MCDT is still awake and the MCDT receives a new message, the shut-down mode will not occur until the RS485 serial ID has been sent and acknowledged. The user’s application must respond or an infinite loop condition would occur causing the MCDT to never shut-down. The MCDT communicates over RS-485. Commands must be followed by a carriage return ( ). Settings are retained only until power is turned off unless the SAV command is used to store them to the unit’s flash memory. When sending commands and queries, a two-digit hexadecimal checksum (cs) can be used to check data integrity, refer to Checksum section after command list. SETTINGS 38400 baud [fixed], No parity, 8 bit, 1 stop bit, No flow control Message Serial Format Decoded message is sent via RS-485: RXM XX YYY ZZ R - Received message TXM XX YYY ZZ - Transmitted message XX = Message Type, YYY = ID code, and ZZ = status code; XX and ZZ are hexadecimal, and YYY is decimal. R is the receive signal strength indicator, see RSS command. Example: TXM 0D 244 0B Message sent by user – Transmits message type “EMIDS” with an ID code of 244 and a status code of TEST, FAULT. MESSAGE TYPE (XX) The message type consists of two (2) hexadecimal characters. The first character shows the parity; the most significant bit will be set if the parity is bad. The second character identifies the type. QTI Form #: 30Z0250 Page 7 of 15 Revision: D Effective Date: 1 August 2010 Good Parity Bad Parity MIDS 07h 87h EMIDS 0Dh 8Dh TRSS 1Dh 9Dh REMBASS 06h 86h Message Type Table NOTE: TRSS and REMBASS message formats available upon request. STATUS ALARM TAMP/TEST LOBATT R>L L>R MEANING CODE 00 RESERVED 01 RESERVED 02 RESERVED 03 FAULT 04 RESERVED 05 RESERVED 06 RESERVED 07 FAULT, LOBATT 08 TEST 09 RESERVED 0A RESERVED 0B TEST, FAULT 0C TEST, LOBATT 0D RESERVED 0E RESERVED 0F TEST, FAULT, LOBATT 10 ALARM 11 ALARM, L>R 12 ALARM, R>L 13 ALARM, FAULT 14 ALARM, LOBATT 15 ALARM, L>R, LOBATT 16 ALARM, R>L, LOBATT 17 ALARM, FAULT, LOBATT 18 TAMP 19 RESERVED 1A RESERVED 1B TAMP, FAULT 1C TAMP, LOBATT 1D RESERVED 1E RESERVED 1F TAMP, FAULT, LOBATT Status Code Table QTI Form #: 30Z0250 Page 8 of 15 Revision: D Effective Date: 1 August 2010 ID CODE (YYY) The unit ID code consists of three (3) decimal characters, but only EMIDS messages use all three. MIDS, TRSS and REMBASS are limited to ID codes 000-063. EMIDS uses 000-999. STATUS CODE (ZZ) Status Codes depend upon the message format. MIDS has no status code, and these characters will always be 00. EMIDS status codes are listed in the previous table. MCDT Serial Commands: Note: It is recommended that when using a processor to control the MCDT that the format described under Checksum be used. This format helps ensure data integrity by greatly reducing communication errors and is more robust for machine to machine (M2M) applications. Valid commands will return the command and the argument followed by the word “OK”. Invalid commands return “SYNTAX ERROR”. Invalid command arguments will return “ERR” at the end of the command and argument. Carriage Return represents end of line and causes the line to be processed. If command is given with “#” at the beginning, then a two digit checksum is expected before . Returned string has a checksum if checksum sent. Checksum is two’s compliment of the command string (everything before checksum). A space is always included between the command and the argument: “CHR 101 ”. Command List ? … Brings up the help menu The current help menu (without checksums) appears as follows: Commands List: HELP/?: Show this menu CHR: Get/Set rcv Chan CHT: Get/Set xmit Chan CMB: Clear message buffer CRF: Get receive channel in Hz CTF: Get transmit channel in Hz MSG: Get rcvd msg NEW: Get new messages PSH: Get/Set push mode PWR: Get/Set xmt pwr level RCV: Get/Set receive mode RSS: Get receive signal strength RST: Reset SAV: Save Current Parameters SID: Get/Set the RS485 ID SLP: Enter Sleep mode SRN: Get unit serial num TMP: Read Temp TXM: Xmit msg, type, ID, stat VER: Show versions QTI Form #: 30Z0250 Page 9 of 15 Revision: D Effective Date: 1 August 2010 CHR… Get/Set the receive channel. (Follow with SAV command.) Z is the channel number, [1 = DEFAULT]: Low Band 0-600; Mid Band 0-1600; High Band 0-1920 Get the channel: CHR Returns: CHR Z Set the channel: CHR Z Returns: CHR Z OK Invalid returns: CHR Z ERR CHT… Get/Set the transmit channel. (Follow with SAV command.) Z is the channel number, [1 = DEFAULT]: Low Band 0-600; Mid Band 0-1600; High Band 0-1920 Get the channel: CHT Returns: CHT Z Set the channel: CHT Z Returns: CHT Z OK Invalid returns: CHT Z ERR CMB… Clear Message Buffer; see MSG command. Get the frequency: CMB Returns: CMB OK CRF… Get the receive channel as a frequency in Hz. (138000000-174000000) Get the frequency: CRF Returns: CRF Z CTF… Get the transmit channel as a frequency in Hz. (138000000-174000000) Get the frequency: CTF Returns: CTF Z MSG… Recall a previous message. Z (decimal 0-9) is the message with 0 being most recent message and 9 being the oldest message. If the requested message is empty, all the fields will return with zeroes. Returned values: TT (hexadecimal) is the message type, III (decimal) is the ID, SS (hexadecimal) is the status code and R (decimal) is the RSSI (see RSS command) Get a message: MSG Z Returns: RXM TT III SS R Invalid returns: MSG Z ERR NEW… Read New messages. Use when PUSH is OFF. This returns the oldest not read message. Send “NEW 1” to mark the message as read, so it will no longer be returned with the “NEW” command. Note: This command can also be used if the PUSH is enabled. Returned values: TT (hexadecimal) is the message type, III (decimal) is the ID, SS (hexadecimal) is the status code and R (decimal) is the RSSI. QTI Form #: 30Z0250 Page 10 of 15 Revision: D Effective Date: 1 August 2010 NEW cont… Poll for a new message: Returns: If no new message Returns: Mark message as read: Returns: NEW RXM TT III SS R RXM NEW 1 NEW 1 OK PSH… Get/Set to push new messages out the serial port. [1 = DEFAULT] Z = 2; ON (Pushes prior to sending the new message) Version 0.2.8.A and above. Z = 1: ON (New messages pushed out the serial port when received) Z = 0; OFF (Master must poll for new messages – Receiver sends RS485 ID on receipt of new message when in power-down mode). Get PUSH mode: PSH Returns: PSH Z Set PUSH mode: PSH Z Returns: PSH Z OK Invalid returns: PSH Z ERR PWR… Get/Set the transmitter power level. [1 = DEFAULT] Z = 1: One watt transmit power Z = 2: Two watt transmit power Get power level: PWR Returns: PWR Z Set power level: PWR Z Returns: PWR Z OK Invalid returns: PWR Z ERR RCV…Get/Set receive mode. [1 = DEFAULT] Z = 1: ON (receiver enabled); CAUTION: If no receiver has been installed, the receiver should be disabled to conserve power. Z = 0: OFF (receiver disabled) Get receive mode: RCV Returns: RCV Z Set receive mode: RCV Z Returns: RCV Z OK Invalid returns: RCV Z ERR RSS… Get the receive signal strength indicator (RSSI). Returns a positive decimal number (0-9), where higher numbers indicate stronger signal. 6+ is good signal strength. Note: This command immediately reads the RSSI value, which is useful to determine if a frequency is being used or jammed. The “MSG” command appends the RSSI value that occurred while receiving the message, which is useful in site selection and deployment. Get RSSI: RSS Returns: RSS R QTI Form #: 30Z0250 Page 11 of 15 Revision: D Effective Date: 1 August 2010 RST… Reset the unit. On start up the MCDT outputs version. Reset the unit: RST Returns: RST OK SAV… Save the current parameters in flash memory. Use this to store any parameter changes. Save current settings: SAV Returns: SAV OK MCDT SID… Get/Set the RS-485 serial identifier. [T = DEFAULT] Capital character (A-Z). All MCDT’s will respond to X so it should not be used. The purpose and use of this command is described below in Checksum. Get protection: SID Returns: SID Z Set protection: SID Z Returns: SID Z OK Invalid returns: SID Z ERR SLP… Shut down the serial port to conserve power. The MCDT goes to power-down mode immediately after returning the SLP OK command. Note: To reactivate the serial port, send a carriage return or some other ASCII character. Use “SLP 0” when RS-485 bus is shared. Enter low power mode: SLP Returns: SLP OK Enter low power mode: SLP 0 Returns: SRN… Get the unit serial number. The serial number is a string up to 8 characters long. Get serial number: SRN Returns: SRN Z TMP… Get the board temperature in degrees Celsius (decimal), with a tenth degree precision (250 = 25.0C). Get temperature: TMP Returns: TMP Z TXM… Transmit Message; TT (hexadecimal) is the message type, III (decimal) is the ID, and SS (hexadecimal) is the status code. Note: The only two allowed messages types are MIDS (07h) or EMIDS (0Dh). Send RF message: TXM TT III SS Returns: TXM TT III SS OK Invalid type returns: TXM TT III SS ERR QTI Form #: 30Z0250 Page 12 of 15 Revision: D Effective Date: 1 August 2010 VER… Get the unit version. MCDT is the model, , VVVV is the firmware version (Major.Minor.Build.Rev), , M is the message types supported (0 = standard [MIDS/EMIDS], 1 = custom), B is the frequency band (0 = low, 1 = mid, 2 = high), H is the hardware capabilities (1 = receive only, 2 = transmit only, 3 = both), R is the hardware board revision. Get version: VER Returns: MCDT VVVV MBHR Checksum To use checksum begin the command with “#” plus the unit serial ID and end the command with the calculated checksum (cs) value followed by the carriage return . A command with an invalid checksum or invalid serial ID is ignored and no reply is sent. The checksum is a 2 digit hexadecimal calculated as the 2’s compliment of the sum of the command string including the “#” and serial ID. Using the checksum also allows and requires using the serial ID. The universal serial ID is X, so all units will acknowledge these commands. The unit will respond with its specific serial ID. Sample syntax: Action With Checksum Without Checksum Get receive channel: #XCHRA8 CHR Returns: #ACHR 196FF CHR 196 Set transmit channel to 2: #XCHT 254 CHT 2 Returns: #ACHT 2 OKB1 CHT 2 Note: “A” is just a sample serial ID, and may be different. Example checksum calculator char CRC2sComp( char *buffr, int end) { //creates 2's complement int c; int calcSum = 0; for( c = 0; c <= end; c ++ ) { calcSum += buffr[c]; } calcSum ^= 0xFF; //1's complement calcSum += 1; //now 2's complement return (char)(calcSum); Example: Line to send is “#ACHR 597 ” Convert characters to ASCII values: # (35) + A (65) + C (67) + H (72) + R (82) + (32) + 5 (53) + 9 (57) + 7 (55) NOTE: is not included in calculation. Sum: 35+65+67+72+82+32+53+57+55 = 518T (206h) 1’s Complement is bit inversion: = [10 0000 0110] [01 1111 1001] = 1F9h 2’s complement is adding 1 to the 1’s complement: 1F9 + 1 = 1FAh Drop anything higher than the lowest 8 bits: [1 1111 1010] [1111 1010] = FAh The result is FAh, so send line as “#ACHR 597FA ” Note: Adding the checksum will result in zero for the low byte. (206h + FAh = 300h) QTI Form #: 30Z0250 Page 13 of 15 Revision: D Effective Date: 1 August 2010 Section 4: Maintenance OPERATOR MAINTENANCE: The MCDT has been designed as low cost low maintenance equipment. All components are conformal coated which reduces the amount of maintenance required. The only required operator maintenance is to inspect the equipment for damage and keep the equipment clean of dirt, grime, and caked on mud. NOTE: Do not submerge the equipment in water. This could result in damage. DEPOT MAINTENANCE: Upper echelon maintenance will be performed by the supplier of the equipment. If the equipment is beyond the user capability to repair, it can be returned to the supplier for test and evaluation. Upon completion of the inspection, the supplier will notify the user if the unit can be repaired. If the equipment is not covered by the warranty, an estimate will be provided for repair costs. If the equipment is not repairable, the supplier will specify replacement costs. (Note: See warranty below for return procedures.) EQUIPMENT STORAGE: Upon return to the facility, clean equipment as noted in operator maintenance above. After cleaning, return the equipment to the storage cases. Store the unit in a dry environment, preferably at room temperature. WARRANTY: Qual-Tron, Inc. guarantees all products to be free from defects in materials and workmanship for 12 months from the date of purchase. Damage due to misuse, accidents, lightning strikes, unauthorized service, environmental conditions beyond the equipment specifications, acts of war or damage other than fair, wear and tear is excluded from this warranty. RETURN PROCEDURES: For support and service, please contact the following. To return any material, contact Qual-Tron, Inc. to receive a Return Material Authorization (RMA) number. Once an RMA number has been assigned, ship the material to the address below and reference the RMA number on the packing slip. Qual-Tron will return the equipment as quickly as possible to the user. QUAL-TRON, INC. Attn: Sales 9409 E. 55th Place Tulsa, OK 74145 Ph: 918-622-7052 Fax: 918-664-8557 email: sales@qual-tron.com TROUBLESHOOTING GUIDE: Defect Possible Cause Will not turn on Does not receive/transmit alarms Corrective Action Low voltage Low voltage Transmitter & receiver too close to each other Frequency Receiver not enabled Wrong message format QTI Form #: 30Z0250 Check power supply Check power supply Experiment with antenna combinations (with & without) Verify transmitter and receiver are on the same frequency Verify receive mode is on Check TRSS mode Page 14 of 15 Stage Area Empl Site Revision: D Effective Date: 1 August 2010 Section 5: Frequency Range Low Mid High Frequency/Channel Calculations Frequency Ranges Frequency Min Max 138 MHz 153 MHz 154 MHz 162 MHz 162 MHz 174 MHz Channel Steps 25 kHz 5 kHz 6.25 kHz Max Channels 600 1600 1920 Channel to Frequency Calculation Channel * Channel Step + Min Frequency = Frequency for Channel Examples: - Low Band Channel 20 - 20 * 0.025 +138 =138.5 MHz - Mid Band Channel 300 - 300 * 0.005 + 154 = 155.5 MHz Frequency to Channel Calculation (Frequency – Min Frequency) / Channel Step = Channel for Frequency Examples: - Low Band 151.5 MHz - (151.5 – 138) / 0.025 = Channel 540 - High Band 172.5 MHz - (172.5 – 162) / 0.00625 = Channel 1680 Section 6: FCC RF Exposure Limits This device complies with the MPE requirements by providing a safe separation distance of 30 cm between the antenna, including any radiating structure, and any persons when normally operated. CAUTION: The antenna(s) used for this transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. This device is approved with emissions having a source-based timeaveraging duty factor not exceeding 50%. Operating at a lower duty cycle than 50% will allow proportionately shorter exposure distance than 30 cm. QTI Form #: 30Z0250 Page 15 of 15 Revision: D Effective Date: 1 August 2010
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