AIERIT12-150Voice/Data Tranceiver Module

FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 1 of 43 TYPE OF EXHIBIT:INSTRUCTION BOOK (PRELIMINARY) FCC PART:2.983 (d) (8) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-154 TYPE OF UNIT:UHF-FM Transceiver FCC ID:AIERIT12-150 DATE:September 15, 1999 Preliminary Instruction Book follows. FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 2 of 43 RITRON, INC. PRELIMINARY 08-99 RITRON MODELS DTX-154 & DTX-454 PROGRAMMABLE FM TRANSCEIVER MODULES MAINTENANCE & OPERATING MANUAL FOR USE ONLY BY AUTHORIZED SERVICE/MAINTENANCE PERSONNEL FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 3 of 43 IMPORTANT MAINTENANCE/REPAIR INFORMATION Surface Mount Repair: RITRON surface mount products require special equipment and servicing techniques. Improper servicing techniques can cause permanent damage to the printed circuit board and/or components, which is not covered by RITRON’s warranty. If you are not completely familiar with surface mount component repair techniques, RITRON recommends that you defer maintenance to qualified service personnel. Precautions For Handling CMOS Devices: The DTX transceiver module contains complementary metal- oxide semiconductor (CMOS) devices, which require special handling techniques. CMOS circuits are susceptible to damage by electrostatic or high voltage charges. Damage can be latent, with no failure appearing until weeks or months later. For this reason, take special precautions any time you disassemble the module. Follow the precautions below, which are even more critical in low humidity environments. 1) Storage/transport-CMOS devices that will be stored or transported must be placed in conductive material so that all exposed leads are shorted together. CMOS devices must not be inserted into conventional plastic “snow” or plastic trays of the type that are being used for other semiconductors. Conductive containers are typically gray or pink in color. 2) Grounding-All CMOS devices must be placed on a grounded bench surface. The technician that will work on the radio/CMOS circuit must be grounded before handling the radio. Normally, the technician wears a conductive wrist strap in series with a 100 kΩ resistor to ground. 3) Clothing-Do not wear nylon clothing while handling CMOS circuits. 4) Power Off-Remove power before connecting, removing, or soldering on a PC board that contains CMOS devices. 5) Power/Voltage Transients-Do not insert or remove CMOS devices with power applied. Check all power supplies to be used for testing CMOS devices, making sure that no voltage transients are present. 6) Soldering-Use a soldering iron with a grounded tip for soldering CMOS circuitry. 7) Lead-Straightening Tools-When straightening CMOS leads, provide ground straps for the tool used. VCO Shield: The VCO shield is virtually impossible to remove without damaging either the PC board or nearby components. The parts within the shield are low failure items; repair or replacement should not be required unless the RF board is mishandled. If failure of a part within the shield is deemed to have occurred, the RF board should be returned to RITRON for service or replacement. Unit Disassembly and Re-assembly: 1) Case Removal a) Remove the two screws at the rear of the unit. These screws secure the rear bracket to the case. b) Remove the two screws (one per side) on the side of the unit. These screws secure the front bracket to the case. c) Slide the case off the two-board assembly. 2) Board Separation FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 4 of 43 Remove the two screws that secure the Loader Board to the rear bracket. Remove the two screws that secure the RF board to the front bracket. The two boards are held together by their interconnecting header/socket. Gently pry the two boards apart at the header/socket. The RF board is then rotated and tilted so to allow the right angle BNC connector to pass through the hole in the front bracket. 3) Re-assembly is the reverse of assembly with the rear screws installed before the side screws. FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 5 of 43 1. MODELS DTX-154 AND DTX-454 SPECIFICATIONS DTX-154DTX-454 1.1GENERAL FCC IdentifierAIERIT12-150AIERIT11-450 (Pending) FCC Rule Parts22, 74, 9022, 74, 90, 95 Frequency Range136-162 MHz*400-420 MHz * 148-174 MHz*420-440 MHz * 430-450 MHz * 450-470 MHz 470-490 MHz * 490-512 MHz * Number of Channels8 Transmit/Receive Spacing26 MHz max.20 MHz max. Mode of OperationSimplex or Half Duplex Frequency ControlPLL Synthesizer Channel Increment (Synthesizer step size)2.5 kHz5/6.25 kHz Emissions Bandwidth Narrow Mode11 kHz Wide Mode16 kHz Frequency Stability (-30 to +65 °C)1.5 ppm Supply Voltage 3 and 6 watt versions w/o internal regulator7.5 VDC w internal regulator11-16 VDC 10 watt versionN/A11.5 to 15 VDC RF Input/Output ConnectorBNC standard Power/Data Interface15 pin subminiature D type Operating Temperature-30 to +65 °C FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 6 of 43 Maximum Dimensions (L x W x H)3.6” x 2.3” x 1.0” including connectors Weight6 oz. * Not Available Yet 1.2TRANSMITTER Operating Bandwidth26 MHz20 MHz RF Output Power(internally adjustable) 3 watt versionN/A1 to 3 watts 6 watt version1 to 6 watts 10 watt versionN/A1 to 10 watts Duty Cycle5 to 100 % depending upon voltage 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:15 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 ma…

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FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 1 of 1 TYPE OF EXHIBIT:ATTESTATION FOR TESTING AND COMPLIANCE MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-154 TYPE OF UNIT:VHF-FM Transceiver FCC ID:AIERIT12-150 DATE:September 15, 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 1 TYPE OF EXHIBIT:STATEMENT CONCERNING RF EXPOSURE FCC PART:2.1091 MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-154 TYPE OF UNIT:VHF-FM Transceiver FCC ID:AIERIT12-150 DATE:September 15, 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: 15 September 1999

FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 1 of 3 TYPE OF EXHIBIT:BLOCK DIAGARAM FCC PART: MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-154 TYPE OF UNIT:VHF-FM Transceiver FCC ID:AIERIT12-150 DATE:September 15, 1999 Block Diagram follows: FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 2 of 3 RF Board Block Diagram IC102 Q102 Q101 LNAMixer I.F. Amp. Back-end Processor Squelch Amp. Discriminator 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 Multiplier IC108 Synthesizer T/R Switch IC106 IC107 +5V +5V RX Voltage Regulator Reference Oscillator Y101 Antenna FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 3 of 3 Loader Board Block Diagram Receive Audio Path Transmit Audio Path IC310 B/C IC310AIC310D Buffer Clipper Filter Clipper IC308 C/D IC308 A/B IC306A IC306 C/D IC301 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 Microprocessor

FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 1 of 5 TYPE OF EXHIBIT:PHOTOGRAPHS-EXTERNAL FCC PART:2.983 (g) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-154 TYPE OF UNIT:VHF-FM Transceiver FCC ID:AIERIT12-150 DATE:September 15, 1999 Photographs follow: FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 2 of 5 FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 3 of 5 FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 4 of 5 FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 5 of 5

FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 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-154 TYPE OF UNIT:VHF-FM Transceiver FCC ID:AIERIT12-150 DATE:September 15, 1999 Label drawing follows: FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 2 of 3 FCC LABEL FCC Label Location FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 3 of 3

FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 1 of 7 TYPE OF EXHIBIT:PHOTOGRAPHS-INTERNAL FCC PART:2.983 (g) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-154 TYPE OF UNIT:VHF-FM Transceiver FCC ID:AIERIT12-150 DATE:September 15, 1999 Photographs follow: FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 2 of 7 FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 3 of 7 FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 4 of 7 FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 5 of 7 FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 6 of 7 FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 7 of 7

FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 1 of 5 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-154 TYPE OF UNIT:VHF-FM Transceiver FCC ID:AIERIT12-150 DATE:September 15, 1999 This exhibit includes a description of the DTX-154 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-154 is a VHF two-way radio designed for either voice or data transmission in the frequency range of 136 to 174 MHz. The deviation can be adjusted so that operation on either 12.5 kHz or 25 kHz channels is possible. The maximum power output is 6 watts. 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: AIERIT12-150 Page 2 of 5 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-154 TYPE OF UNIT:VHF-FM Transceiver FCC ID:AIERIT12-150 DATE:September 15, 1999 EMISSION TYPES: 12.5 kHz Channel Spacing 11K0F3E 11K0F1D 25 kHz Channel Spacing 16K0F3E FREQUENCY RANGE 136 to 174 MHz OPERATING POWER VALUES 1 to 6 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 watts FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 3 of 5 TYPE OF TEST:DC VOLTAGE CHART FCC PART:2.983 (d) (5) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-154 TYPE OF UNIT:VHF-FM Transceiver FCC ID:AIERIT12-150 DATE:September 15, 1999 TEST RESULTS: Nominal Supply Voltage = 7.5 VDC FrequencyOutput PowerFinal Stage VoltageFinal Stage CurrentControl Voltage (MHz)(W)(VDC)(IDC)(VDC) 148.0251.07.170.661.42 2.07.081.001.68 3.06.991.321.90 4.06.931.562.13 5.06.851.862.67 6.06.782.113.50 161.0001.07.140.761.62 2.07.041.121.87 3.06.971.402.09 4.06.911.612.29 5.06.851.842.59 6.06.782.073.09 173.9751.07.150.751.72 2.07.041.001.93 3.06.991.242.18 4.06.951.472.48 5.06.881.693.05 6.06.801.974.00 FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 4 of 5 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-154 TYPE OF UNIT:VHF-FM Transceiver FCC ID:AIERIT12-150 DATE:September 15, 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 L115 and L116 and capacitors C169 through C173. 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 CIRCUITRY The output power is limited and controlled by setting the voltage on the Vgg pin of the RF PA module. This pin sets the bias voltage of the driver stage internal to the module. The upper voltage limit of this pin is limited to 3.6 volts by the 5 volt limit of the power control logic IC and the voltage divider which follows. When operated at the specified supply voltage, the unit is not capable of exceeding the rated output power limit. FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 5 of 5 TYPE OF EXHIBIT:CIRCUIT DESCRIPTION: FREQUENCY DETERMINING AND STABILIZING FCC PART:2.983 (d) (10) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-154 TYPE OF UNIT:VHF-FM Transceiver FCC ID:AIERIT12-150 DATE:September 15, 1999 The frequency stability of the unit is solely determined by the frequency stability of the master reference oscillator, Y101, located on the RF board. Y101 is a voltage controlled temperature compensated crystal oscillator. Temperature compensating circuitry internal to this device ensures that with constant frequency control voltage, the frequency will remain within guaranteed tolerances over the required temperature range. Since the frequency can also be controlled by the voltage on the frequency control pin, the voltage to this pin is from a precision voltage regulator, IC314 on the loader board.

FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 1 of 8 TYPE OF EXHIBIT:TUNE-UP PROCEDURE FCC PART:2.983 (d) (9) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-154 TYPE OF UNIT:VHF-FM Transceiver FCC ID:AIERIT12-150 DATE:September 15, 1999 Tune-up procedure follows: FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 2 of 8 Warning: Alignment must only be performed by qualified and trained service personnel. The DTX module is aligned at the factory before shipment and should need no further adjustment. It is possible that the gain settings for the audio input and output signal paths may need optimized. The frequency trim, deviation, and balance should not need adjustment. The procedure for performing all of the alignment steps is detailed below. The unit should not be opened for alignment; all adjustments are electronic and effected through the programmer software. REQUIRED TEST EQUIPMENT Depending upon which alignment steps are to be performed, some or all of the following pieces of test equipment may be required: DC Power Supply -capable of operating at the correct voltage for the module and capable of 2.5 Ampere minimum current. RF Signal Generator-capable of operating at the carrier frequency of the module with an output level adjustment and able to be frequency modulated. FM Demodulator/Deviation Meter-capable of operating at the carrier frequency of the module. RF Frequency Counter-must operate at the RF frequency of the unit with a resolution of 10 Hz or better and an accuracy of 1 ppm or better. Audio Oscillator-must have sinewave output allow for output frequency and amplitude adjustment. Oscilloscope RF Power Attenuator or Dummy Load with coupled output-must be 50 ohms impedance at the operating frequency and rated for the output power of the module and have an output which can drive the FM demodulator at the correct level and the frequency counter. RF Power Meter-capable of accurately indicating the RF output power of the module. Note: A two-way radio test set may include most, if not all, of the required equipment, except for the power supply. ALIGNMENT PROCEDURE It is not absolutely necessary to perform all of the alignment steps detailed below. However, some adjustments interact somewhat with others e.g. balance affects deviation, deviation affects AUX IN gain, and the output power has a slight affect on TX frequency trim. It may be prudent to spot check all of the adjustments which interact. These will be indicated in the particular alignment step. The programmer must be connected to the unit via the programming interface cable and the alignment screen selected. During alignment, the channel may be selected via the channeling control lines on the module or through the programmer. A channel pull-down menu allows for the selection. Also, the unit can be keyed through the programmer, if desired. FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 3 of 8 RX FREQUENCY TRIM The RX Frequency Trim trims the unit on frequency during receive. This setting, if incorrect, may degrade receive sensitivity, distortion, and possible recovered audio level, which in turn affects AUX OUT (RX) Gain and Audio PA Gain. To determine if the receiver is correctly trimmed to frequency, the 1 st local oscillator frequency must be measured. When the RX frequency trim box on the alignment screen is highlighted, certain stages in the transmit chain are enabled which cause the local oscillator leakage at the antenna connector to stronger than normal. Even so, the level may be less than 0 dBm. The frequency counter must be connected directly to the antenna connector and be able to operate at this level. DO NOT KEY THE UNIT DURING THIS PROCEDURE AS SERIOUS DAMAGE TO THE COUNTER MAY RESULT! A channel with a receive frequency programmed into it should be selected. The correct local oscillator will be displayed on the programmer channel box. The frequency on the counter should be observed and the RX Frequency Trim value adjusted for least error. AUX OUT GAIN To set the AUX OUT gain, an RF signal generator must be connected to the DTX module. Its frequency should be set to that of a programmed channel. The generator should be modulated at the desired deviation, typically 60 % of maximum, with a 1 kHz tone. The RF output level is not critical, but should be above any squelch threshold which may have been set. –70 dBm should be sufficient. If not, squelch can be disabled via the settings menu of the programmer for this procedure. With an oscilloscope connected to the AUX OUT output, the AUX OUT Gain setting should be set to value which produces the desired output level. Note that the output impedance of the AUX OUT is about 600 ohms. If the load impedance of the load that will be connected to this output is less than 10 kΩ of so, a resistor of a value equal to the load impedance should be connected when making the adjustment. AUDIO PA GAIN To set the Audio PA gain, an RF signal generator must be connected to the DTX module. Its frequency should be set to that of a programmed channel. The generator should be modulated at the desired deviation, typically 60 % of maximum, with a 1 kHz tone. The RF output level is not critical, but should be above any squelch threshold which may have been set. A –70 dBm level should be sufficient. If not, squelch operation can be disabled via the settings menu of the programmer. With an oscilloscope connected to the AUX OUT output, the AUX OUT Gain setting should be set to value which produces the desired output level. CARRIER DETECT ON and CARRIER DETECT OFF The Carrier Detect On and Carrier Detect Off settings control the RF level (or Signal-to-noise ratio) at which the DCD output goes true and what level at which it goes false. To prevent chattering on noise, these two settings are not normally the same. A few dB of hysteresis is usually prov…

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FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 1 of 3 TYPE OF EXHIBIT:SCHEMATICS FCC PART:2.983 (d) (7) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-154 TYPE OF UNIT:VHF-FM Transceiver FCC ID:AIERIT12-150 DATE:September 15, 1999 Schematic diagrams follow: FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 2 of 3 FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 3 of 3

FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 1 of 43 TYPE OF EXHIBIT:LIST OF ATTACHED EXIBITS MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-154 TYPE OF UNIT:VHF-FM Transceiver FCC ID:AIERIT12-150 DATE:September 15, 1999 The following exhibits are contained in this file. Other required exhibits 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, schematic diagrams, 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: AIERIT12-150 Page 2 of 43 TYPE OF EXHIBIT:STATEMENT OF CERTIFYING ENGINEER FCC PART:2.947 MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-154 TYPE OF UNIT:VHF-FM Transceiver FCC ID:AIERIT12-150 DATE:September 15, 1999 I, Sam L. Dulaney, am now, and have been for the past year and a half, 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:15 September 1999 FCC Equipment Authorization Application Exhibit. RITRON, INC. FCC ID: AIERIT12-150 Page 3 of 43 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-154 TYPE OF UNIT:VHF-FM Transceiver FCC ID:AIERIT12-150 DATE:September 15, 1999 The RITRON model DTX-154 is a voice/data two-way radio designed for operation on either 12.5/15 kHz or 25/30 kHz channels in the 136-174 MHz frequency band. Its output power is variable from 1 watt to 6 watts. 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: AIERIT12-150 Page 4 of 43 EXIHIBIT:TEST EQUIPMENT LIST FCC PART:2.947 MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-154 TYPE OF UNIT:VHF-FM Transceiver FCC ID:AIERIT12-150 DATE:September 15, 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: AIERIT12-150 Page 5 of 43 TYPE OF TEST:DESCRIPTION OF MEASUREMENT FACILITY FCC PART:2.948 MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-154 TYPE OF UNIT:VHF-FM Transceiver FCC ID:AIERIT-12-150 DATE:September 15, 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: AIERIT12-150 Page 6 of 43 TYPE OF TEST:RADIO FREQUENCY POWER OUTPUT FCC PART:2.985 MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:DTX-154 TYPE OF UNIT:VHF-FM Transceiver FCC ID:AIERIT12-150 DATE:September 15, 1999 PROCEDURE: 1. The DTX-154 was aligned for transmitter operation on 148.025, 161.000 and 173.975 MHz at full rated power per the tune-up procedure outlined in the Preliminary Maintenance Manual. 2. Power was supplied to the DTX-154 by an Astron VS 12M Power Supply. The DTX-154 was connected at the RF Test Jack J401 to the input of a Bird 6154 Thermaline Wattmeter used to measure RF power of the carrier. The Wattmeter provides a resistive 50 ohm termination at the frequencies and power levels used for this test. 3. A B&K Digital Multimeter was connected in series with pin 3 of IC104 to measure the PA module final stage current. A Fluke 45 Digital Multimeter was us…

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