AIERIT33-46009UHF TRANSCEIVER MODULE

RITRON, INC. PRELIMINARY 07-12 RITRON MODELS DTX-X60 SERIES PROGRAMMABLE FM TRANSCEIVER MODULES OPERATING MANUAL PRELIMINARY! TABLE OF CONTENTS 1 INTRODUCTION 1.1 GENERAL 1.2 MODEL IDENTIFICATION 1.3 FCC REGULATIONS 2 MODELS DTX-154 AND DTX-454 SPECIFICATIONS 2.1 GENERAL 2.2 TRANSMITTER 2.3 RECEIVER 3 DTX-154/454 INPUT/OUTPUT CONNECTOR 4 ACCESSORIES 5 OPERATION 5.1 CHANNEL SELECTION 5.2 POWER SUPPLY VOLTAGE 5.3 DUTY CYCLE/KEY-DOWN LIMITATIONS 5.4 OPERATING MODES 5.5 RNET COMPATIBILITY MODE 1 INTRODUCTION 1.1 GENERAL The RITRON DTX Plus modules are programmable 2-way radios, which operate either in the VHF or UHF professional FM communications bands as well as a number of other bands in the 220 MHz and 350 MHz region. Each of eight channels can be programmed to contain a unique set of operating frequencies. The DTX Plus module is made up of two PC boards, an RF board and a control/loader board. These two boards are enclosed in a metal case with two connectors on one end; a 50 ohm BNC connector for connection to an antenna and a DB-15 sub-miniature connector for power and control input/output. In addition, the RF board is available as a stand-alone unit for system integrators. 1.2 MODEL IDENTIFICATION The part number system for the DTX Plus module is as follows: The module has a part number in the form of “DTX-A54-BCDEF” Where: A is the major frequency band designator: 1=VHF (136-174 MHz bands) 2=220-245 MHz band 3=340-400 MHz bands 4=UHF (400-430 MHz and 450-470 MHz bands) B is the sub-band designator: G=136-162 for #1 above , 340-360 MHz for #3 above, and 400-430 MHz for #4 above. A=420-440 B=430-450 O=148-174 for #1 above, 220-245 for #2 above, 360-380 for #3 above, and 450-470 for #4 above. M=380-400 for #3 above. C=470-490 T=490-512 Note that not all of the sub-bands listed above may be available, and that other sub-bands may become available. C is the connector designator: B=BNC connector M=MCX connector D designates the IF bandwidth: W=wide (25/30 kHz channel bandwidth) N=narrow (12.5/15 kHz channel bandwidth) S=very narrow (5/ 6.25/ 7.5 kHz channel bandwidth) E designates the maximum power level: 3=3 watts 6=6 watts 9=10 watts F designates whether the control/loader board has a regulator and if so, at what current level: D=no regulator; the unit must operate from external, regulated +7.5 VDC and is limited to either 3 or 6 watts max. L=low current regulator; the power module is not regulated. Used for 10 watt version only. I=high current regulator; the unit operates from 10-15 volts at either 3 or 6 watts max. Example: A DTX-454-OBN6I would be a UHF module for operation between 450 and 470 MHz with a BNC RF connector, narrow (12.5 kHz channel bandwidth) IF bandwidth, 6 watts maximum output power, and an internal regulator to allow operation from 10 to 15 volts. The part number system for a stand-alone RF board is the same as that for a module except that “F” designator (regulator option) does not exist and a “-DD” is appended at the end. 1.3 FCC REGULATIONS 1.3.1 LICENSING For those frequency bands governed by FCC rules, the FCC requires that the radio owner obtain a station license for his radio before using the equipment to transmit, but does not require an operating license or permit. The station licensee is responsible for proper operation and maintenance of his radio equipment, and for ensuring that transmitter power, frequency and deviation are within the limits specified by the station license. This includes checking the transmitter frequency and deviation periodically using appropriate methods. Note also, that wideband operation (25/30 kHz channel bandwidth) may not be permitted. 1.3.2 PRODUCT CERTIFICATION The DTX modules are certified by the FCC for operation in the United States and by Industry Canada for operation in Canada on certain frequency bands and sub-bands for transmission of either voice or data signals when aligned according to the alignment procedure for the proper bandwidth and when operated as a complete unit in the metal case. Operation of the RF board as a stand-alone unit or in combination with any other equipment, in any mode outside the alignment procedure, or with the clipper filter electronically disabled will require the filing of a new type acceptance application with the FCC by the user. 1.3.3 SAFETY STANDARDS-RF EXPOSURE RF ENERGY EXPOSURE AWARENESS AND CONTROL INFORMATION, AND OPERATIONAL INSTRUCTIONS FOR FCC OCCUPATIONAL USE REQUIREMENTS: BEFORE USING THIS 2-WAY RADIO, READ THIS IMPORTANT RF ENERGY AWARENESS AND CONTROL INFORMATION AND OPERATIONAL INSTRUCTIONS TO ENSURE COMPLIANCE WITH THE FCC’S AND IC’S RF EXPOSURE GUIDELINES. NOTICE: This radio is intended for use in occupational/controlled conditions, where users have full knowledge of their exposure and can exercise control over their exposure to meet FCC/IC limits. This radio device is NOT authorized for general population, consumer, or any other use. This 2-way radio uses electromagnetic energy in the radio frequency (RF) spectrum to provide communications between two or more users over a distance. It uses radio frequency (RF) energy or radio waves to send and receive calls. RF energy is one form of electromagnetic energy. Other forms include, but are not limited to, electric power, sunlight and x-rays. RF energy, however, should not be confused with these other forms of electromagnetic energy, which when used improperly can cause biological damage. Very high levels of x-rays, for example, can damage tissues and genetic material. Experts in science, engineering, medicine, health and industry work with organizations to develop standards for exposure to RF energy. These standards provide recommended levels of RF exposure for both workers and the general public. These recommended RF exposure levels include substantial margins of protection. All 2-way radios marketed in North America are designed, manufactured and tested to ensure they meet government established RF exposure levels. In additi…

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TYPE OF EXHIBIT: DESCRIPTION OF MEASUREMENT FACILITY FCC PART: 2.948 MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012 The ERP and field strength of spurious emissions 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 Industry Canada. 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, IN. Sam L. Dulaney Chief Engineer RITRON, Inc. TYPE OF EXHIBIT: MANUFACTURER’S STATEMENT FCC PART: MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012 The RITRON model DTX-460-0__9 is a UHF Transceiver Module designed for operation on 6.25 kHz or 12.5 kHz channel bandwidths. Its output power is variable from 1 watts to 10 watts. This product will be manufactured and marketed on a continuing basis in the United States of America by the applicant, RITRON, Inc. of Carmel, IN. TYPE OF EXHIBIT: STATEMENT OF CERTIFYING ENGINEER FCC PART: 2.947 MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012 I, Sam L. Dulaney, am now, and have been for the past nine years employed as the Chief Engineer with RITRON, Inc. I have been employed in the two-way radio industry for the past 28 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 are representative of units which will be manufactured by RITRON. Sam L. Dulaney Chief Engineer RITRON, Inc. TYPE OF EXHIBIT: ANTI-DRUG ABUSE CERTIFICATION FCC PART: 1.2002(b) MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012 I, Sam L. Dulaney, certify that RITRON is not subject to a denial of Federal benefits, that include FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862 because of a conviction for possession or distribution of a controlled substance. Sam L. Dulaney Chief Engineer RITRON, Inc.

Ritron, Incorporated 505 W. Carmel Drive · Carmel, IN 46032 P. O. Box 1998 · Carmel, IN 46082 Ph: 317-846-1201 Email: [email protected] Web Site: www.ritron.com Federal Communications Commission Authorization and Evaluation Division Confidentiality Request regarding application for certification of FCC ID: AIERIT33- 46009 Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request confidential treatment of information accompanying this application as outlined below: Exhibit Type File Name Block Diagram Schematics Operational Description Semiconductor List Tune-up Procedure DTX46009BlkDia.pdf DTX46009Schem.pdf DTX46009OpDes.pdf DTX46009PartsLst.pdf DTX46009TunePro.pdf The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. The applicant understands that pursuant to Section 0.457 of the Rules, disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. Sincerely, Sam L. Dulaney Chief Engineer Ritron, Inc.

Ritron, Incorporated 505 W. Carmel Drive · Carmel, IN 46032 P. O. Box 1998 · Carmel, IN 46082 Ph: 317-846-1201 Email: [email protected] Web Site: www.ritron.com August 24, 2012 Office of Engineering and Technology Laboratory Division Equipment Authorization Branch FCC Laboratory7435 Oakland Mills Rd. Columbia, MD 21046 Re: FCC ID: AIERIT33-46009 To whom it may concern: The DTX-460 10-watt OEM radio module was designed to operate in the frequency band 450-470 MHz. To aid equipment authorization in other countries which accept the United States FCC Grant for certification, Ritron is requesting that the FCC lists the frequencies 450-470 MHz under FCC Rule Parts 90 on the FCC Grant. For the FCC’s Rule Part 90 applications, this radio is used in systems by OEM systems integrators as indicated in the table below. Equipment programming is the responsibility of Authorized Service Personnel. Also, the radio complies with 47 CFR Part 90.203(e) in that the operator cannot directly program the transmit frequencies using the normally accessible external controls. Per the FCC’s KDB634817 guidance, “as an alternative to listing the exact frequencies, we acknowledge that it’s a violation of the FCC Rules if this device operates on unauthorized frequencies.” Frequency Range (MHz) Part 90 Canada Grant Notes Emission Designator Part 90 450-454 MHz x EF 10K0F3E, 4K00F1E, 8K00F1E, 4K00F1D, 8K00F1D, 4K00F7W, 8K00F7W, 4K00F2D, 8K60F2D 454-456 MHz x EF “ 456-470 MHz x EF “ Sincerely, Sam L. Dulaney Chief Engineer Ritron, Inc. Email: [email protected]

TYPE OF EXHIBIT: PHOTOGRAPHS-EXTERNAL FCC PART: 2.1033(c)(12) MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012 External views of the unit follow:

TYPE OF EXHIBIT: EQUPIMENT LABEL-LOCATION FCC PART: 2.1033(c)(11) MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012 Photograph of unit showing location of equipment label follows:

TYPE OF EXHIBIT: EQUPIMENT LABEL-SAMPLE FCC PART: 2.1033(c)(11) MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012 www.ritron.com 317-846-1201 FCC ID: AIERIT33-46009 IC: 1084A-RIT3346009 Model: DTX-460-0BN9L SN: W00001 CGF: Designed and Manufactured in Carmel, Indiana USA TOLERANCES (EXCEPT AS NOTED) FRACTIONAL ± ANGULAR ± RITRON, INC. 505 West Carmel Drive Carmel, IN 46033 SERIAL LABEL FCC ID: MODEL: DTX-460 DRAWN BY: Scale: Material: CHK’D: TRACED: DATE: APP’D: DRAWING NO: 1. MATERIAL IS “TAMPER-PROOF” DESTRUCTIVE FLEXCON MYLAR #MM-150-S, .003” THICK WITH HI-TACK ADHESIVE BACKING AND .001” THICK THERMAL TRANSFER LAMINATE 2. BLACK BACKGROUND WITH SILVER GRAPHICS 3. DTX-145 TO BE LEFT JUSTIFIED IN BLOCK BACKGROUND IN BOLD, 7 POINT, HELVETICA FONT 4. SN TO BE IN BOLD, 6 POINT HELVETICA FONT WITH BAR CODE TO BE CODE 93, AND MATCHED TO THE SERIAL # 5. ALL TYPE FONTS ARE TO BE HELVETICA TYPE STYLE, 4 POINT UNLESS OTHERWISE NOTED 6. “FCC ID: AIERIT33-46009” AND “IC: 1084A-RIT3346009” ARE TO BE HELVETICA BOLD TYPE, 5 POINT FONT SIZE. 7. THE RITRON LOGO SHOWN IS FOR REFERENCE ONLY. RITRON WILL SUPPLY ORIGINAL LOGO ARTWORK 1.99 2.75

TYPE OF EXHIBIT: PHOTOGRAPHS-INTERNAL FCC PART: 2.1033(c)(12) MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012 Internal views of the unit follow: RF Board-Component Side, shields removed RF Board-Component side with shields RF Board-Solder Side Control/Loader Board-Component Side, shields removed Control/Loader Board-Component Side without shields Control/Loader Board-Solder Side Control/Loader and RF Boards mated

TYPE OF EXHIBIT: RF EXPOSURE EVALUATION FCC PART: 1.1310 MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012 PROCEDURE: Because this product is used as a mobile device, an RF evaluation was done. The RF evaluation entailed testing the unit on RITRON’S 3-meter range to determine EIRP and then calculating the minimum safe distance from the antenna necessary to ensure compliance with the appropriate RF exposure limits. 1. The measurement for effective radiated power was taken at the RITRON, Inc. 3-meter test site, details of which are on file with the FCC and Industry Canada. 2. The DUT was aligned for transmitter operation on lower, middle and upper band edge frequenices at the 10-watt maximum output power rating of the DTX-460 per the tune-up procedure outlined in the Maintenance Manual. The unit was then terminated at the antenna port in a quarterwave magnetic mount antenna which is typical of what might be used with this product. (The user may connect other antennas, however.) 3. All field strength measurements were made with the Hewlett-Packard Model 8560E Spectrum Analyzer and an Electro-Metrics EM-6924 adjustable dipole antenna tuned to the carrier frequency. TYPE OF EXHIBIT: RF EXPOSURE EVALUATION FCC PART: 1.1310 MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012 PROCEDURE (Continued): 4. The RAM-1545 quarterwave antenna (0 dBi gain) was connected to the DUT via its cable and tested above a 0.5m x 0.5 m ground plane. The height of the field strength measurement antenna and the azimuth orientation of the antenna were varied to provide maximum field strength. The maximum levels were noted. 5. A substitution antenna, an Electro-Metrics EM-6924 adjustable dipole, was substituted for the quarterwave antenna at the DTX-460’s previous location. An RF signal generator was set for the frequency of the DUT with the level at the substitution antenna noted. 6. The height of the receiving antenna was adjusted for maximum signal strength. The level at the receiving antenna was noted. TYPE OF EXHIBIT: RF EXPOSURE EVALUATION FCC PART: 1.1310 MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012 EQUATIONS FOR EIRP: The substitution antenna is specified from the manufacturer in terms of antenna factor rather than antenna gain. The conversion is: Ga(dbd) = 20 log f (MHz) – AF(dB) – 31.9 The effective radiated power (ERP) is then: ERP(dBm) = Pr(dBm) + Pgen(dBm) – Ps(dBm) – Ga(dBd) Where: Pr is the power level of the radio’s emission at the receiving antenna output. Pgen is the RF signal generator level at the substitution antenna input. Ps is the power level of the substitution antenna emission at the receiving antenna output. Ga is the gain of the substitution antenna. The ERP is converted to watts from dBm by: ERP(watts) = antilog 10 ((ERP(dBm) – 30)/10) And finally, ERP is converted to EIRP (isotropic radiator) by: EIRP = 1.64 ERP TYPE OF EXHIBIT: RF EXPOSURE EVALUATION FCC PART: 1.1310 MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012 RESULTS FOR EIRP: Frequency Pr Pgen Ps Ga ERP EIRP (MHz) (dBm) (dBm) (dBm) (dBd) (dBm) (watts) 450.025 +5.8 0.0 -27.3 0.1 +33.0 2.00 461.750 -4.0 0.0 -27.7 0.1 +31.6 1.43 469.925 +6.0 0.0 -28.2 0.1 +34.1 2.60 DETERMINING MPE DISTANCE: Power density is related to EIRP: S(W/m 2 ) = EIRP(W)/4r 2 where r is the distance from the source in meters. Rearranging for distance: _________ r = (EIRP/4S) The MPE (maximum permissible exposure) for a device operating in a General Population/Uncontrolled exposure environment is f(MHz)/1500 mW/cm 2 . Converting to W/m 2 , the limit becomes f(MHz)/150 W/m 2 . The MPE limit is substituted for S and EIRP is entered in the above equation. TYPE OF EXHIBIT: RF EXPOSURE EVALUATION FCC PART: 1.1310 IC PART: RSS-102 MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012 RESULTS FOR MPE: Frequency EIRP Duty Cycle S limit Distance Distance (MHz) (watts) % W/m 2 cm in 450.025 2.00 50 3.00 16.3 6.4 461.750 1.43 50 3.07 13.6 5.4 469.925 2.60 50 3.13 18.2 7.2 RF WARNING STATEMENT: The following statement appears in the Users Manual regarding RF safety: RF ENERGY EXPOSURE AWARENESS AND CONTROL INFORMATION, AND OPERATIONAL INSTRUCTIONS FOR FCC OCCUPATIONAL USE REQUIREMENTS: BEFORE USING THIS 2-WAY RADIO, READ THIS IMPORTANT RF ENERGY AWARENESS AND CONTROL INFORMATION AND OPERATIONAL INSTRUCTIONS TO ENSURE COMPLIANCE WITH THE FCC’S AND IC’S RF EXPOSURE GUIDELINES. NOTICE: This radio is intended for use in occupational/controlled conditions, where users have full knowledge of their exposure and can exercise control over their exposure to meet FCC/IC limits. This radio device is NOT authorized for general population, consumer, or any other use. This 2-way radio uses electromagnetic energy in the radio frequency (RF) spectrum to provide communications between two or more users over a distance. It uses radio frequency (RF) energy or radio waves to send and receive calls. RF energy is one form of electromagnetic energy. Other forms include, but are not limited to, electric power, sunlight and x-rays. RF energy, however, should not be confused with these other forms of electromagnetic energy, which when used improperly can cause biological damage. Very high levels of x-rays, for example, can damage tissues and genetic material. Experts in science, engineering, medicine, health and industry work with organizations to develop standards for exposure to RF energy. These standards provide recommended levels of RF exposure for both workers and the general public. These recommended RF exposure levels include substantial margins of protection. All 2-way radios marketed in North America are designed, manu…

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TYPE OF EXHIBIT: TABLE OF CONTENTS FCC PART: 2.1033(c)(14) MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012 Description Page List of Test Equipment Used 2 Measurement Methods 3 Description of Measurement Facility 4 Radio Frequency Output Power 5 Modulator Response 7 Clipper Filter Response 10 Modulation Limiting Curves 14 Occupied Bandwidth 17 Bandwidth Calculations/Modulation Types 24 Conducted Spurious Emissions 27 Field Strength of Spurious Emissions 31 Frequency Stability vs Temperature 37 Frequency Stability vs Supply Voltage 40 Transient Frequency Behavior 42 TYPE OF EXHIBIT: LIST OF TEST EQUIPMENT USED FCC PART: 2.947(d) MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012 ITEM MAKE/MODEL SERIAL NO. CAL. NEXT CAL. DC Power Supply Astron VS 20M 9205017 N/A N/A Multimeter BK Precision 2704A 234-008459 N/A N/A RF Test Set HP 8920AB US39225560 6/22/2012 6/22/2013 Spectrum Analyzer Advantest R3265A 75060189 6/22/2012 6/22/2013 Spectrum Analyzer HP 8560E 3720A02980 6/22/2012 6/22/2013 Storage Scope Fluke PM3335 DM630034 N/A N/A Temp. Chamber Delta Design 3900 0-52-R N/A N/A Audio Test Set A/P SYS-322A SYS1-33641 N/A N/A Thermocouple Triplett 320-G/P N/A N/A TYPE OF EXHIBIT: MEASUREMENT METHODS FCC PART: 2.947 MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012 All of the measurements made on this device and included in this report were made per ANSI/TIA-603-C-2004. Sam L. Dulaney Chief Engineer RITRON, Inc. TYPE OF EXHIBIT: DESCRIPTION OF MEASUREMENT FACILITY FCC PART: 2.948 MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012 The Field Strength measurements filed with this application were made on a site certified by RITRON, Inc. Data pertaining to this side are on file with the FCC and Industry Canada 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, IN. Sam L. Dulaney Chief Engineer RITRON, Inc. TYPE OF EXHIBIT: RADIO FREQUENCY OUTPUT POWER FCC PART: 2.1046(a) MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012 PROCEDURE: 1. The DTX-460 was aligned for transmitter operation at three power levels per the tune-up procedure outlined in the Maintenance manual for frequencies at the lower, middle and upper band edges. 2. Power was supplied to the DTX-460 by an Astron VS 20M Power Supply. The DTX-460 was connected to a HP8920B Test Set used to measure the RF carrier power. The input to the Test Set provides a resistive 50-ohm termination at the frequencies and power levels used for this test. 3. The voltage across an internal shunt in series with the power supply lead of the RF Power Module was used with a fluke 45 Digital Multimeter to measure current (Id). A Fluke 45 Digital Multimeter was used to measure the RF Power Module output stage power control voltage (Vcon) and drain voltage (Vd). In addition, the digital power control setting (Con. Value) used to set the output power was noted and recorded. 4. Measurements were taken at various power levels between 2 watts and 10 watts. TYPE OF EXHIBIT: RADIO FREQUENCY OUTPUT POWER FCC PART: 2.1046(a) MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012 RESULTS: 450.025 MHz Carrier Frequency Po (watts) Vcon (V) Vd (V) Id (A) 2.0 2.405 12.28 0.99 4.0 2.563 12.15 1.51 6.0 2.650 12.08 1.79 8.0 2.781 11.99 2.11 10.0 3.048 11.88 2.48 461.750 MHz Carrier Frequency Po (watts) Vcon (V) Vd (V) Id (A) 2.0 2.399 12.33 0.82 4.0 2.512 12.25 1.16 6.0 2.617 12.18 1.46 8.0 2.761 12.11 1.74 10.0 3.001 12.03 2.02 469.925 MHz Carrier Frequency Po (watts) Vcon (V) Vd (V) Id (A) 2.0 2.370 12.36 0.69 4.0 2.485 12.29 1.01 6.0 2.605 12.22 1.30 8.0 2.815 12.14 1.61 10.0 3.490 11.99 2.20 TYPE OF EXHIBIT: MODULATOR RESPONSE-12.5 kHz CHANNELS FCC PART: 2.1047(a) MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012 PROCEDURE: 1. The DTX-460 was aligned for transmitter operation at 461.750 MHz at full rated power per the tune-up procedure outlined in the Maintenance manual. 2. The response was measured from the audio input to the modulator input. 3. The audio test set was swept in frequency from 200 Hz to 10 kHz and the results noted. Plots are shown for both 6.25 kHz and 12.5 kHz channel spacing operation and for 12.5 kHz channel spacing, for both flat and pre- emphasized audio. The frequency response is independent of carrier frequency, therefore, only the center operating frequency is shown. TYPE OF EXHIBIT: MODULATOR RESPONSE-12.5 kHz CHANNELS FCC PART: 2.1047(a) MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012 RESULTS: Flat audio input A ud io P re c is io n0 4 /0 5 /1 1 1 0 :1 1 :3 2 -4 0 + 1 0 -3 0 -2 0 -1 0 +0 d B r 10010k2005001k2k5k Hz TYPE OF EXHIBIT: MODULATOR RESPONSE-12.5 kHz CHANNELS FCC PART: 2.1047(a) MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012 RESULTS: Pre-emphasized audio input A ud io P re c is io n0 4 /0 5 /1 1 0 9 :3 6 :4 1 -4 0 + 1 0 -3 0 -2 0 -1 0 +0 d B r 10010k2005001k2k5k Hz TYPE OF EXHIBIT: MODULATOR RESPONSE-6.25 kHz CHANNELS FCC PART: 2.1047(a) MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012…

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TYPE OF EXHIBIT: TEST SETUP PHOTO FCC PART: MANUFACTURER: RITRON, Inc. MODEL: DTX-460-0__9 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT33-46009 DATE: July 3, 2012