AIERIT11-450Two Way Radio Transceiver Module

FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 1 of 32 TYPE OF EXHIBIT:INSTRUCTION BOOK (PRELIMINARY) FCC PART:2.983 (d) (8) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-454 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT11-450 DATE:February 2, 1999 Preliminary Instruction Book follows. FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 2 of 32 RITRON, INC. RITRON MODEL DTX-454 PROGRAMMABLE FM TRANSCEIVER MODULE MAINTENANCE & OPERATING MANUAL FOR USE ONLY BY AUTHORIZED SERVICE/MAINTENANCE PERSONNEL FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 3 of 32 DTX454 SPECIFICATIONS GENERAL FCC IdentifierAIERIT11-450 (pending) FCC Rule Parts22, 74, 90, 95 Frequency Range400-420 MHz * 420-440 MHz * 430-450 MHz * 450-470 MHz 470-490 MHz * 490-512 MHz * Number of Channels8 Transmit/Receive Spacing20 MHz max. Mode of OperationSimplex or Half Duplex Frequency ControlPLL Synthesizer Channel Increment (Synthesizer step size)5/6.25 kHz Emissions Bandwidth Narrow Mode11 kHz Wide Mode16 kHz Frequency Stability (-30 to +65C)1.5 ppm Supply Voltage 6 watt version w/o internal regulator7.5 VDC w internal regulator11-16 VDC 10 watt version11.5 to 15 VDC RF Input/Output ConnectorBNC Power/Data Interface15 pin subminiature D type Operating Temperature-30 to +65 C Maximum Dimensions (L x W x H)3.6” x 2.3” x 1.0” including connectors Weight6 oz. * Not Available Yet FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 4 of 32 TRANSMITTER Operating Bandwidth20 MHz RF Output Power 6 watt version1 to 6 watts, adjustable 10 watt version1 to 10 watts, adjustable Duty Cycle5 to 100 % depending upon heatsink and power level RF Load Impedance50 ohms Modulation Distortion (per TIA/EIA 603)5 % max. Modulation Frequency Response (+1/-3 dB ref 1 kHz) At MIC IN (ref pre-emphasis curve)50 Hz to 2500 Hz At AUX IN w/o pre-emphasis50 Hz to 2700 Hz Transmitter Attack Time: To within 2.5 ppm final frequency10 ms max. To within 0.5 ppm final frequency15 ms max. Spurious and Harmonics-20 dBm max. FM Hum and Noise (per TIA/EIA 603) 12.5 kHz channel operation40 dB min. 25 kHz channel operation45 dB min. Group Delay Variation (Within Frequency Response)5 us max. Current Drain 6 watt version at 7.5 VDC supply 1 watt1.0 A max. 6 watts2.4 A max. 10 watt version at 13.7 VDC supply 1 watt0.7 A max. 10 watts2.4 A max. FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 5 of 32 RECEIVER Operating Bandwidth20 MHz Sensitivity (12 SINAD w de-emphasis)0.30 uV (-117.5 dBm) RF Input Impedance50 ohms Adjacent Channel Selectivity +/- 12.5 kHz w narrow IF60 dB min. +/- 25 kHz w wide IF70 dB min. Spurious and Image Rejection70 dB min. Intermodulation Rejection70 dB min. FM Hum and Noise (per TIA/EIA 603) 12.5 kHz channel operation40 dB min. 25 kHz channel operation45 dB min. Conducted Spurious-57 dBm max. Receive Attack Time15 ms max. Audio Distortion (per TIA/EIA 603)5 % max. Audio Response at AUX OUT (+1/-3 dB, ref 1 kHz) 12.5 kHz channel operation100 Hz to 3.5 kHz 25 kHz channel operation100 Hz to 5 kHz Group Delay Variation (Within Frequency Response)20 us max. Receive Current Drain75 mA max. FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 6 of 32 DTX-154/454 INPUT/OUTPUT CONNECTOR Pin NumberNameDescriptionComments 1CS0Channel Select low bit 2CS1Channel Select mid bit 3CS2Channel Select high bit 4MIC INMicrophone InputInput for microphone type signals to be transmitted. Signals at this input are pre-emphasized, limited, and filtered. 5CSNChannel Select 6RAW SUPPLYPower Supply InputPositive Supply voltage input. 7AUX INAuxiliary InputWideband input for data. 8AUX OUTAuxiliary OutputWideband output for data. 9PGN IN/OUTProgramming I/OExternal programmer connects here. 10.CTSClear to SendActive high when transmitter can accept modulation. 11.RX MONMonitorBreaks squelch in receive. 12.AUDIO OUTAudio PA OutputOutput of audio PA. 13.DCDCarrier DetectCarrier detect output. 14.PTT RTSPush to TalkActivates transmitter. 15.GNDGroundNegative supply point and reference for all inputs. FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 7 of 32 Pin NumberDescription 1 CS0-Least significant bit of the channel select lines. Active high 5 volt TTL/CMOS level. 2 CS1-Mid bit of the channel select lines. Active high 5 volt TTL/CMOS level. 3 CS2-Most significant bit of the channel select lines. Active high 5 volt TTL/CMOS level. ChannelCS0CS1CS2 1000 2001 3010 4011 5100 6101 7110 8111 0 = Logic low 1 = Logic high 4 MIC IN-Microphone input. This input accepts microphone type input signals for transmit The signal is amplified, passed through the clipper and the clipper filter and then to the RF board. This input can be programmed to be disabled (muted) if desired. 5 CSN-When enabled through programming, this input selects between channels 1 and 2. This input is TTL/CMOS level type input with a logic low required for channel 1 and a logic high required for channel 2. 6 RAW SUPPLY- The positive supply voltage for the unit is supplied through this pin. The actual supply voltage required depends upon model type. Ensure that the correct supply voltage per the given model is used. 7 AUX IN-This is the broadband input for modulation. The gain through this input to the modulator is programmable as is the use of pre-emphasis. This signal passes through the clipper and clipper filter. 8 AUX OUT-This is the broadband output of the receiver. The gain from the receiver to the output is programmable as is the use of de-emphasis. The choice of AC or DC coupling from the RF board discriminator is also programmable. 9 PGN IN/OUT-Connect via Ritron RPT-PCPK PC Programming Kit to computer for programming the unit. 10 CTS-Clear-To-Send output from the unit which indicates that the unit is transmitting a c…

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FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 1 of 1 TYPE OF EXHIBIT:ATTESTATION FOR TESTING AND COMPLIANCE MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-454 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT11-450 DATE:February 2, 1999 This equipment has been tested in accordance with the requirements contained in the appropriate Commission regulations. To the best of my knowledge, these tests were performed using measurement procedures consistent with industry or Commission standards and the results demonstrate that the equipment complies with the appropriate standards. Each unit manufactured, imported, or marketed as defined in the Commission’s regulations will conform to the samples tested within the variations that can be expected due to quantity production and testing on a statistical basis. All units, however, will comply with the appropriate standards. I further certify that the necessary measurements were made at the facilities of Ritron, Inc., either by myself or, by a qualified individual under my direct supervision. Sam L. Dulaney Engineering Group Manager

FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 1 of 3 TYPE OF EXHIBIT:BLOCK DIAGARAM FCC PART: MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-454 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT11-450 DATE:February 2, 1999 Block Diagram follows: FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 2 of 3 RF Board Block Diagram IC102 Q102 Q101 LNAMixer I.F. Amp. Back-end Processor Squelc h Amp. Discriminato r Amp. RSSI DISC. OUT IC104 Q104 Q105 Q106 Q107 VCO VCO Buffers PA Drivers PA Q108 IC101 Q103 IC103 VCO MOD. MOD. IN X 3 Q112 Multiplie r IC108 Synthesize T/R Switch IC106 IC107 +5V +5V RX Voltage Regulator Reference Oscillator Y101 Antenna FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 3 of 3 Loader Board Block Diagram Receive Audio Path Transmit Audio Path IC310 B/C IC310AIC310D Buffe r Clipper Clipper IC308 C/D IC308 A/B IC306A IC306 C/D IC30 Audio Power Amplifier Aux. Output Amplifier Buffer Mic-In Amplifier Aux-In Amplifier Modulation Out Audio Out Auxiliary Out Mic IN Auxiliary In Disc. In IC 314 IC316 IC317 Voltage Regulators +5VA +5VD +7.2VDC IC302 Microprocesso r

FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 1 of 4 TYPE OF EXHIBIT:PHOTOGRAPHS-EXTERNAL FCC PART:2.983 (g) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-454 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT11-450 DATE:February 2, 1999 Photographs follow: FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 2 of 4 FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 3 of 4 FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 4 of 4

FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 1 of 3 TYPE OF EXHIBIT:FCC LABEL DRAWING FCC PART:2.983 (f) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-454 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT11-450 DATE:February 2, 1999 Label drawing follows: FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 2 of 3 FCC LABEL FCC Label Location FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 3 of 3

FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 1 of 6 TYPE OF EXHIBIT:PHOTOGRAPHS-INTERNAL FCC PART:2.983 (g) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-454 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT11-450 DATE:February 2, 1999 Photographs follow: FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 2 of 6 FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 3 of 6 FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 4 of 6 FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 5 of 6 FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 6 of 6

FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 1 of 10 TYPE OF EXHIBIT:OPERATIONAL DESCRIPTION FCC PART:2.983 (d) (1,2,3,4,5,6,10,11) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-454 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT11-450 DATE:February 2, 1999 This exhibit includes a description of the DTX-454 along with some of the items required by FCC part 2.983 (d). The items of part 2.983 (d) not included here exist as separate exhibits which are a part of this type acceptance application. The DTX-454 is a UHF two-way radio designed for either voice or data transmission. The deviation can be adjusted so that operation on either 12.5 kHz or 25 kHz channels is possible. The maximum power output can be either 6 watts or 10 watts, depending upon model. The device is designed for an external power supply, whose voltage can be either 7.5 VDC or range from 11 to 15 VDC depending upon model. A more detailed description of the device, including specifications, theory of operation, and input/output definition can be found in the user/maintenance manual, which is a separate exhibit. FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 2 of 10 TYPE OF EXHIBIT:TYPES OF EMISSION FREQUENCY RANGE OPERATING POWER VALUES MAXIMUM POWER RATING FCC PART:2.983 (d) (1, 2, 3, 4) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-454 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT11-450 DATE:February 2, 1999 EMISSION TYPES: 12.5 kHz Channel Spacing 11K0F3E 11K0F1D 25 kHz Channel Spacing 16K0F3E FREQUENCY RANGE 450 to 470 MHz OPERATING POWER VALUES 6 watt version:1 to 6 watts 10 watt version: 1 to 10 watts Power is controlled by adjusting the bias voltage on the PA stage of the RF power module. This voltage typically varies between 1.5 and 3 volts. Typical values are shown in the DC voltage chart which follows. MAXIMUM POWER RATING 6 watt version:6 watts 10 watt version:10 watts FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 3 of 10 TYPE OF TEST:DC VOLTAGE CHART 6 Watt Maximum Output Power Version FCC PART:2.983 (d) (5) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-454 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT11-450 DATE:January 28, 1999 TEST RESULTS: Nominal Power Supply Voltage = 7.5 VDC FrequencyOutput PowerFinal Stage VoltageFinal Stage CurrentControl Voltage (MHz)(W)(VDC)(IDC)(VDC) 450.01251.07.40.781.46 2.07.31.131.71 3.07.31.442.00 4.07.31.722.30 5.07.21.992.63 6.07.22.283.01 461.75001.07.40.731.35 2.07.31.061.63 3.07.31.351.90 4.07.31.622.20 5.07.21.862.52 6.07.22.153.03 469.98751.07.40.721.33 2.07.31.031.60 3.07.31.291.87 4.07.31.562.21 5.07.21.862.68 6.07.22.143.25 FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 4 of 10 TYPE OF TEST:DC VOLTAGE CHART 10 Watt Maximum Output Power Version FCC PART:2.983 (d) (5) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-454 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT11-450 DATE:January 28, 1999 TEST RESULTS: Nominal Supply Voltage = 13.7 VDC FrequencyOutput PowerFinal Stage VoltageFinal Stage CurrentControl Voltage (MHz)(W)(VDC)(IDC)(VDC) 450.01251.013.60.591.64 2.013.60.851.90 3.013.61.062.11 4.013.51.192.25 5.013.51.352.40 6.013.51.532.60 7.013.41.732.77 8.013.41.882.93 9.013.42.053.16 10.013.42.163.38 461.7500113.60.511.39 2.013.60.721.61 3.013.60.911.80 4.013.51.101.97 5.013.51.262.23 6.013.51.472.49 7.013.41.692.72 8.013.41.822.95 9.013.42.043.30 10.013.42.203.45 Note: Results at 469.9875 MHz shown on following page. FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 5 of 10 TYPE OF TEST:DC VOLTAGE CHART 10 Watt Maximum Output Power Version FCC PART:2.983 (d) (5) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-454 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT11-450 DATE:January 28, 1999 TEST RESULTS: Nominal Supply Voltage = 13.7 VDC FrequencyOutput PowerFinal Stage VoltageFinal Stage CurrentControl Voltage (MHz)(W)(VDC)(IDC)(VDC) 469.9875113.60.541.38 2.013.60.741.64 3.013.60.941.86 4.013.51.092.02 5.013.51.252.22 6.013.51.432.44 7.013.41.552.63 8.013.41.732.79 9.013.41.912.97 10.013.42.063.30 FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 6 of 10 TYPE OF EXHIBIT:CIRCUIT DESCRIPTION: SPURIOUS RADIATON SUPPRESSION MODULATION LIMITING POWER LIMITING FCC PART:2.983 (d) (11) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-454 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT11-450 DATE:February 2, 1999 SPURIOUS RADIATION SUPPRESION CIRCUITRY Occupied Bandwidth The occupied bandwidth of the transmitted signal is controlled by a combination of modulation limiter (described below) and clipper filter. The limiter is followed by a five pole active filter formed around IC310B and IC310C. This filter is of quasi-raised cosine design and removes high frequency audio components either from the input signal or from the limiting process itself. Transmitter Spurious The voltage controlled oscillator in the unit operates at the carrier frequency, thus no sub- harmonics of the carrier exist. The type of synthesizer used (fractional-N) along with a well designed synthesizer loop filter ensure that synthesizer reference spurs are well suppressed. The harmonics of the transmitter carrier are attenuated by an Elliptic RF lowpass filter formed around a buried stripline on the RF board and capacitors C164, C165, C166, and C168. MODULATION LIMITING CIRCUITRY The transmitter modulation is limited by passing the audio signal to be transmitted through an amplitude limiter based around operational amplifier, IC310A, on the loader board. This device is allowed to be driven to its output voltage limits which provides a very stable and repeatable clamp on its output signal amplitude. POWER LIMITING CI…

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FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 1 of 5 TYPE OF EXHIBIT:TUNE-UP PROCEDURE FCC PART:2.983 (d) (9) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-454 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT11-450 DATE:February 2, 1999 ALL ADJUSTMENTS REQUIRED FOR ALIGNMENT ARE EFFECTED ELECTRONICALLY THROUGH COMPUTER INTERFACE USING RPT-PCPK SOFTWARE. THE DTX-154/454 COVER DOES NOT HAVE TO BE REMOVED FROM THE UNIT FOR ALIGNMENT. RECOMMENDED EQUIPMENT 1. Power Supply-0 to 15 volts, 3 ampere current capability. 2. FM Service Monitor (500 MHz RF capability). 3. Oscilloscope (100 kHz min.) 4. FM Deviation Meter. 5. RF Wattmeter, 10 watts full scale. 6. Frequency Counter (500 MHz min.) 7. SINAD measuring device. 8. VTVM or DMM. 9. 30 dB RF Power Attenuator. 10. Audio Generator, 300 to 300 Hz, 0 to 1V RMS output. 11. RITRON model RTX-SRVBD adapter 12. RSM-3X 13. PC computer and RITRON PC programmer kit. Note: The FM Service Monitor may contain include many of the other instruments required. RADIO PREPARATION FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 2 of 5 Connect the programming adapter to pin 9 of the radio’s DB-15 connector. Install the programming software and open the program. Select the DTX-154/454 radio from the radio menu. If the unit has never been programmed before, the settings should be at their default settings as shipped. If any changes have been made, however, for alignment, the settings should be placed at the default value as shown below: FunctionValue TX Frequency Trim0 RX Frequency Trim0 Modulation Balance0 TX Deviation`20 AUX IN Audio Gain20 AUX OUT Audio Gain20 AUDIO OUT Gain20 TX Output Power12 Squelch Lower Limit40 Squelch Upper Limit45 TX Timeout Timer60 Clipper Filter EnableOn RX De-emphasis EnableOff Audio PA RX EnableOn RX AC/DC CoupledAC TX Pre-emphasis EnableOff AUDIO OUT Squelch EnableOn AUX OUT Squelch EnableOn AUDIO MON EnableOn AUX OUT MON EnableOn Busy Channel Lockout EnableOn DCD PolarityNormal PTT RTS PolarityNormal FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 3 of 5 MON PolarityNormal SETUP Using the VTVM (or DMM), set the Power Supply to the correct supply voltage. Connect the positive lead of the supply to pin 6 of the radio’s DB-15 connector. Connect the negative lead to pin 15. Connect the FM Service Monitor to the BNC RF connector on the unit. Program the desired operating frequencies into the unit for both transmit and receive. TRANSMITTER Output Power In the programming program, advance to the TX Output Power section. The current channel will be highlighted. Key the unit via the program and adjust the TX POWER value until the correct power is noted. Repeat for all channels. The unit must be un-keyed before a channel can be changed. Frequency Note: The unit must be at an ambient temperature of 22 +/- 1 C (71.6 +/- 1.8 F) for proper setting of frequency. Move to the TX Frequency Trim section of the programming software. Choose a channel whose frequency is near the middle of the group of programmed channels. Set the Service Monitor to display transmit frequency or connect a Frequency Counter to the unit through a Power Attenuator. Key the unit via the program and adjust the value for the correct frequency. If the unit has been programmed correctly, this value should be satisfactory for all channels and can be made common to all channels in the program. If desired, however, the frequency for each channel may be set individually. Deviation and Balance An audio generator set to 500 Hz should be connected to pin 7 (AUX IN) of the DB-15 connector. The output level should be set for 500 mv RMS. The RF output of the unit should be connected to the FM Service Monitor. The Service should be set up to display the demodulated output signal on an oscilloscope. Minimal filtering of the demodulated signal, especially on the low frequency end, should be used. De-emphasis should not be used. Move to the Modulation Balance section of the program. Select a channel near the middle of the programmed frequency range. Key the unit and confirm that a sinewave or clipped sinewave is visible on the oscilloscope. Increase the audio generator level until clipping is clearly visible. Adjust the value until the clipped portion is as flat as possible. There may be some initial overshoot at the clipping point, but the region after should be flat. This adjustment must be repeated for all channels if the frequencies differ by 2 MHz or more. Move to the TX Deviation section of the program. Set the FM Service Monitor to measure transmitter modulation deviation or connect an FM Deviation meter to the unit through the RF Power Attenuator. With the audio generator still connected and set at the same level as above, adjust the frequency of the generator until the greatest deviation is noted. Set the deviation value to product the correct maximum deviation, i.e. 2.5 kHz for 12.5 kHz operation and 5 kHz for 25 kHz operation. This adjustment must be repeated for all channels if the frequencies differ by 2 MHz or more. Other Functions FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 4 of 5 The other features/functions of the unit should be set via the programming software for transmit operation as desired or returned to the previous settings. RECEIVER The AUDIO OUT pin (pin 12 on the DB-15 connector) on the unit should be connected an oscilloscope. Connect the RX MON pin (pin 11 on the DB-15 connector) to ground. Noise should be visible on the oscilloscope. Front-End The front-end filters have been tuned at the factory for optimum performance across the entire frequency band of operation. Unless the factory settings have been altered, no adjustment is necessary or advisable. Aligning the front-end requires programming the unit for receive frequencies at the center and each end of the band and noting t…

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FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 1 of 1 TYPE OF EXHIBIT:STATEMENT CONCERNING RF EXPOSURE FCC PART:2.1091 MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-454 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT11-450 DATE:February 2, 1999 Per the FCC Rules and Regulations as described in the Commission’s OET Bulletin 65, this device is categorically excluded from routine RF evaluation because it is a Part 90, low power, intermittently activated transmitter. Certifying Engineer:______________________________________ Sam L. Dulaney – Group Manager Date: 8 February, 1999

FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 1 of 2 TYPE OF EXHIBIT:SCHEMATIC-LOADER BOARD FCC PART:2.983 (d) (7) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-454 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT11-450 DATE:February 2, 1999 Schematic diagram of Loader Board follows: FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 2 of 2

FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 1 of 2 TYPE OF EXHIBIT:SCHEMATIC-RF BOARD FCC PART:2.983 (d) (7) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-454 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT11-450 DATE:February 2, 1999 Schematic diagram of RF Board follows: FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 2 of 2

FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 1 of 46 TYPE OF EXHIBIT:LIST OF ATTACHED EXIBITS MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-454 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT11-450 DATE:February 2, 1999 The following exhibits are contained in this file. Other exhibits required were electronically filed as separate exhibits. This file may make reference to information contained in these separate exhibits. This includes, but is not limited to, schematics, drawings, and photographs. Description of ExhibitFCC Rule(s) Statement of Certifying Engineer2.947 Manufacturer’s Statement2.983 (a), (b), (c) List of Test Equipment Used2.947 (d) Description of Measurement Facility2.948 Statement Certifying Spectrum Efficiency90.203 (j) (3) Radio Frequency Power Output2.985 Modulator Response2.987 (a), (b) Clipper Filter Response2.987 (a) Modulation Limiting Curves2.987 (b) Occupied Bandwidth2.989 (c), 90.210 (b), 90.210 (d), 90.211 (a) Spurious Emissions at Antenna Terminal2.991 Field Strength of Spurious Radiation2.993 (b) Frequency Stability vs. Temperature2.995 (a), 90.213 (a) Frequency Stability vs. Supply Voltage2.995 (d) Transient Frequency Behavior90.214 FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 2 of 46 TYPE OF EXHIBIT:STATEMENT OF CERTIFYING ENGINEER FCC PART:2.947 MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-454 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT11-450 DATE:February 2, 1999 I, Sam L. Dulaney, am now, and have been for the past year, employed as an Engineering Group Manager with RITRON, Inc. I have been employed in the two-way radio industry for the last 15 years. I received a BSEE degree from West Virginia University in 1978 and an MSEE degree from West Virginia University in 1980. I hereby certify that all the measurements and data herein were taken by me, or under my direct supervision and that they were obtained using sound and accepted engineering principles, and that they accurately reflect the performance and characteristics of the unit tested. Further, I attest that manufacturing controls exist such that this data is representative of units which will be manufactured by RITRON. Certifying Engineer:______________________________________ Sam L. Dulaney – Group Manager Date: 8 February, 1999 FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 3 of 46 TYPE OF EXHIBIT:MANUFACTURER’S STATEMENT FCC PART:2.983 (a) (b) (c) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-454 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT11-450 DATE:February 2, 1999 The Ritron model DTX-454 is a voice/data two-way radio designed for operation on either 12.5 kHz or 25 kHz channels in the 450-470 MHz frequency band. Its output power is variable from 1 watt to either 6 watts or 10 watts, depending upon model. This unit will be manufactured and marketed on a continuing basis in the United States of America by the applicant, RITRON, Inc. of Carmel, Indiana. FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 4 of 46 EXIHIBIT:TEST EQUIPMENT LIST FCC PART:2.947 MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-454 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT11-450 DATE:February 3, 1999 The measurements taken for this application were obtained using one or more of the following pieces of equipment. ITEMMANUFACTURERMODEL NO.SERIAL NO. DC Power SupplyAstronVS 12M90071655 MultimeterFluke456967029 MultimeterBK Precision2704A234-008455 WattmeterTelewave61215081 RF Test SetHewlett-Packard8920AR# 01498 Spectrum AnalyzerTektronix7L12R# 01334 Spectrum AnalyzerHewlett-Packard8559A2010A06979 Spectrum AnalyzerHewlett-Packard8560ER# 01540 Digital Storage ScopeFluke/PhilipsPM3335DM630034 PlotterHewlett-Packard7585B2503A05509 Temperature ChamberDelta Design3900 CL0-52-R Frequency CounterHewlett-Packard5383A1716A01417 Function GeneratorBK Precision4010275-00280 Modulation AnalyzerHewlett-Packard8901A2426A03311 Network AnalyzerHewlett-Packard8753EUS37390503 FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 5 of 46 TYPE OF TEST:DESCRIPTION OF MEASUREMENT FACILITY FCC PART:2.948 MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-454 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT-11-450 DATE:February 3, 1999 The Field Strength measurements filed with this application were made on a site certified by RITRON, INC. Data pertaining to this site are on file with the FCC and are current. This site is used on a continuing basis exclusively by RITRON, INC. and is utilized only for RF Field Strength Measurements of equipment designed and manufactured by RITRON, INC. It is not used for measurements by, or for, any other party on a contract basis or otherwise. All other measurements were taken at Ritron’s Engineering Laboratory in Carmel, Indiana. FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT11-450 Page 6 of 46 TYPE OF TEST:RADIO FREQUENCY POWER OUTPUT FCC PART:2.985 MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-454 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT11-450 DATE:February 3, 1999 PROCEDURE: 1. The DTX-454 was aligned for transmitter operation on 450.0125, 461.750 and 469.9875 MHz at full rated power per the tune-up procedure outlined in the Preliminary Maintenance Manual. This represents frequencies at the low, middle and high end of the DTX-454 operating frequency band. To cover the power range of 1 to 10 watts, two versions exists, one with a maximum output power of 6 watts and one with a maximum output power of 10 watts. These two versions are identical except for the RF output module device. Two different modules are used to cover the two power ranges. 2. Power was supplied to the DTX-454 by an Astron VS 12M Power Supply. The DTX…

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