AIERIT39-46006UHF Modem Module

Rev. 07/14 RITRON DTXM SERIES II DTXM-X60 FAMILY PROGRAMMABLE WIRELESS FM MODEM TRANSCEIVERS VHF/220 MHz/340-400 MHz/UHF 6.25 kHz/12.5 kHz/25 kHz Channels Multiple Protocol 1 INTRODUCTION 1.1 GENERAL The DTX Plus Series II modem is a wireless modem designed to operate on the frequency bands at VHF, UHF, and 220 MHz. It supports over-the-air data rates of 4800 bps in a 5.0/6.25/7.5 kHz channel, 9600 bps in a 12.5/15 kHz channel, and 19.2 kbps in a 25/30 kHz channel. The modem supports three protocols, the legacy packet protocol of the DTXM-X54 series, a small-packet streaming protocol, and a no-overhead streaming protocol with no error detection/correction. Besides offering data communications, the DTX Plus modem includes voice transceiver audio input and outputs. The complete modem transceiver is housed in the standard DTX Plus case, resulting in a light, compact package. 1.2 MODEL IDENTIFICATION The DTX Plus modem has a part number in the form of “DTXM-A60-BCDEF” Where: A is the major frequency band designator: 1=VHF (136-174 MHz) 2=217-245 MHz 3=340-400 MHz 4=UHF (400-520 MHz) B is the sub-band designator: G=340-360 and 400-420 A=420-440 B=430-450 0=136-174, 217-245, 360-380, and 450-470 M=380-400 C=470-490 T=490-512 C is the connector designator: B=BNC connector M= MCX connector S=SMA connector D designates the channel bandwidth: S=6.25 kHz N=12.5 kHz W=25 kHz E designates the maximum power level: 3=3 watts 6=6 watts 9=10 watts F designates the regulator option I=Internal regulator (10-16 VDC operation with regulated RF power amplifier) D=No regulator (7.5 VDC operation) L=RF PA is unregulated, but the remainder of the modem is regulated (10-watt versions) Example: A DTXM-460-OBN6I would be a UHF module for operation between 450 and 470 MHz with a BNC RF connector, narrow (12.5 kHz channel spacing) IF bandwidth, 6 watts maximum output power, and an internal regulator to allow operation from 10 to 15 volts. 1.3 FCC REGULATIONS 1.3.1 Licensing 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. 1.3.2 Equipment Authorization (Certification) At the time of this publication, March, 2014, none of the DTXM-X60 series products have been certified and thus, cannot be operated in those bands/countries that require an equipment authorization. This device has not been authorized as required by the rules of the Federal Communications Commission. This device is not, and may not be, offered for sale or lease, or sold or leased, until authorization is obtained. 1.3.3 Radio Frequency Exposure The FCC, with its action in General Docket 79-144, March 13, 1985, adopted a safety standard for human exposure to radio frequency electromagnetic energy emitted by FCC regulated equipment. The DTXM product family has been evaluated for compliance with the maximum exposure limits for RF energy at the maximum power rating of the unit and with the only antenna sold for use with this product by RITRON. To ensure compliance with the General Population/Uncontrolled maximum exposure limits, please observe the following: When the Ritron RAM-1545 remote magnetic mount antenna is used, mount the antenna in a location that will ensure that all persons will be located away from the antenna by the following minimum distances: Model Minimum Distance DTXM-160-0BX6 13.7 in. (34.8 cm) DTXM-260-0BX6 DTXM-460-0BX3 7.9 in. (20.0 cm) DTXM-460-0BX6 7.9 in. (20.0 cm) DTXM-460-0BX9 8.3 in. (21.0 cm) Antennas other than the Ritron RAM-1545 must be tested with the DTXM for RF exposure compliance in the environment in which it is to be used per the FCC’s OET Bulletin 65, Edition 97-01 or Industry Canada RSS- 102. 2 SPECIFICATIONS 2.1 GENERAL FCC Rule Parts 90 IC Rule Parts RSS-119 Data rate (bps) 6.25 kHz channel 4800 bps 12.5 kHz channel 9600 bps 25 kHz channel 19,200 bps Modulation Voice Direct FM Data 4FSK Over-the-Air Protocols Ritron Proprietary Number of Channels 2 Operating Bandwidth VHF 38 MHz 220 MHz 28 MHz 340-400 MHz 20 MHz 400-430 MHz 30 MHz UHF 20 MHz Synthesizer Step Size VHF 2.5 kHz 220 MHz 2.5/3.125 kHz 300-430 and UHF 5.0/6.25 kHz Emissions Bandwidth Voice Not allowed 12.5 kHz channels 10.0 kHz 25 kHz channels 15.0 kHz Data 6.25 kHz channels 4.0 kHz 12.25 kHz channels 8.0 kHz 25 kHz channels 16.0 kHz Frequency Stability -30°C to +60°C +/- 1.0 ppm -30°C to +75°C +/- 1.5 ppm Supply Voltage D-version 7.5+/-0.5 VDC I, L-versions 11-16 VDC RF Connector BNC (optional MCX and SMB) Power/Data Connector 15-pin subminiature D-type Dimensions (LxWxH) 3.6”x 2.3” x1.0” Weight 6 oz Indicators Transmit LED, Receive LED 2.2 TRANSMITTER RF Output Power VHF,220 MHz, 300-430 MHz 1-6 watts UHF 1-3 watts, 1-6 watts, 2-10 watts RF Load Impedance 50 ohms resistive, VSWR 1.5:1 or less PTT attack time 10 ms max. Spurious and Harmonics -25 dBm max. FM Hum and Noise 6.25 kHz channel 35 dB min. 12.5 kHz channel 40 dB min. 25 kHz channel 45 dB min. Current Drain 1 watt 1.1 A max. 2 watts 1.6 A max. 6 watts 2.2 A max. 10 watts 2.6 A max. 2.3 RECEIVER Sensitivity Voice (12 dB SINAD) 0.25 uV max. Data (10 -3 BER) 0.30 uV max. Adjacent Channel Selectivity 6.25 kHz channel 50 dB min. 12.5 kHz channel 60 dB min. 25 kHz channel 70 dB min. Spurious and Image Rejection 70 dB min. IMD Rejection 67 dB min. FM Hum and Noise 6.25 kHz channel 35 dB min. 12.5 kHz channel 40 dB min. 25 kHz channel 45 dB min. Conducted Emissions -57 dBm max. Squelch Attack Time 15 ms max. Receive Current Drain 120 mA max. 3 DTXM I/O CONNECTOR AND INDICATORS 3.1 15-PIN I/O CONNECTOR Connector Pinout Pin Name Description Comments 1 AUDIO_IN Input Input fo…

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TYPE OF EXHIBIT: DESCRIPTION OF MEASUREMENT FACILITY MANUFACTURER: RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL: DTXM-460 TYPE OF UNIT: UHF-Modem Module FCC ID: AIERIT39-46006 DATE: August 24, 2014 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: DTXM-460 TYPE OF UNIT: UHF Transceiver Module FCC ID: AIERIT39-46006 DATE: August 24, 2014 The RITRON model DTXM-460 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 watt to 6 watts. It is NOT a radio module as defined by FCC and Industry Canada and does NOT require a modular approval. 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 MANUFACTURER: RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL: DTXM-460 TYPE OF UNIT: UHF Modem Module FCC ID: AIERIT39-46006 DATE: August 24, 2014 I, Sam L. Dulaney, am now, and have been for the past fifteen years employed as Chief Engineer with RITRON, Inc. I have been employed in the two-way radio industry for the past 29 years. I received a BSEE and an MSEE degree from West Virginia University. 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 MANUFACTURER: RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL: DTXM-460 TYPE OF UNIT: UHF Modem Module FCC ID: AIERIT39-46006 DATE: August 24, 2014 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: AIERIT39-46006. 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 DTXM46006BlkDia.pdf DTXM46006Schem.pdf DTXM46006OpDes.pdf DTXM46006PartsLst.pdf DTXM46006TunePro.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 September 24, 2014 Office of Engineering and Technology Laboratory Division Equipment Authorization Branch FCC Laboratory7435 Oakland Mills Rd. Columbia, MD 21046 Re: Extended Frequency Justification on FCC ID: AIERIT39-46006 To whom it may concern: The DTXM-460 6-watt OEM radio modem module was designed to operate in the frequency band 450- 470 MHz. To aid equipment authorization in other services/countries which accept the United States FCC Grant for certification, but which are not governed by the FCC, Ritron is requesting that the FCC list the frequencies 450-470 MHz under FCC Rule Parts 90 on the FCC Grant. This is being requested to facilitate the requirements of agencies covered under NTIA spectrum usage. Government agencies complying with the NTIA instead of the FCC and other countries must purchase their equipment from private industry manufacturers who are governed under the FCC rules. This conflict in spectrum allocation detracts from the options available to the government agencies for commercial off-the-shelf equipment which meets their required specifications such as the requirements stated in the Department of Interior’s narrowband Digital Radio Contract. Per the FCC’s KDB634817 guidance, “as an alternative to listing the exact frequencies, we acknowledge that it is a violation of the FCC Rules if this device operates on unauthorized frequencies.” Also, per FCC Rules Parts 90.203(e) and (g), programming of transmitter frequencies can only be performed by the manufacturer or authorized service and maintenance personnel. Frequency Range (MHz) Part 90 Other 450-454 x 454-456 x 456-452.5375 x 462.5375-462.7375 x 462.7375-467.5375 x 467.5375-467.7375 x 467.7375-470 x 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: DTXM-460 TYPE OF UNIT: UHF Modem Module FCC ID: AIERIT39-46006 DATE: August 24, 2014 External views of the unit follow:

TYPE OF EXHIBIT: EQUPIMENT LABEL-SAMPLE FCC PART: 2.1033(c)(11) MANUFACTURER: RITRON, Inc. MODEL: DTXM-460 TYPE OF UNIT: UHF Modem Module FCC ID: AIERIT39-46006 DATE: July 24, 2014 RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 DRAWN BY CHK’D TRACED SCALE DATE APP’D MATERIAL DRAWING NO. REV. REVISIONS NO. DATE BY 1 2 3 4 5 TOLERANCES (EXCEPT AS NOTED) DECIMAL± FRACTIONAL ± ANGULAR ± DTXM-460 SERIAL LABEL/FCC LABEL SLD 07/12/14 1. MATERIAL MATTE SILVER POLYESTER WITH PERMANENT ADHESIVE. 2. SERIAL NUMBER FORMAT: TWO DIGIT YEAR(YY) PLUS TWO DIGIT WEEK(WW) OF MANUFACTURE PLUS A FOUR DIGIT NUMBER (XXXX) THAT IS UNIQUE TO THE YYWW PREFIX. 3. MODEL SHOULD BE POPULATED WITH THE MODEL OF THE PRODUCT BEING ASSEMBLED. 4. CFG SHOULD BE POPULATED FOR PRODUCTS THAT VARY FROM THE BASE MODEL. 5. ALL TYPE FONTS ARE TO BE HELVETICA TYPE STYLE. 6. THE FCC ID: AND IC: NUMBERS WILL BE PRINTED WITH THE APPROPRIATE NUMBERS FOR THE SELECTED MODEL. 2:1 IMPORTANT! THIS LABEL IS USED FOR PRODUCTS WHOSE SERIAL NUMBER LABEL IS PRINTED INTERNALLY USING THE RITRON LABEL PRINTING PROGRAM. IN ADDITION, THIS LABEL REPRESENTS A GENERIC LAYOUT FOR INTERNALLY PRINTED LABELS AS ALL CRITICAL INFORAMTION WILL BE POPULATED BASED UPON WHICH MODEL IS SELECTED AT TIME OF PRINTING. 1.99” .99” DTXM-460-0BN6I Model: SN: FCC ID: AIERIT39-46006 IC: 1084A-RIT3946006 www.ritron.com 317-846-1201 YYWWXXXX Designed and Manufactured in Carmel, Indiana USA UHF Modem Module CFG:

TYPE OF EXHIBIT: PHOTOGRAPHS-INTERNAL FCC PART: 2.1033(c)(12) MANUFACTURER: RITRON, Inc. MODEL: DTXM-460 TYPE OF UNIT: UHF Modem Module FCC ID: AIERIT39-46006 DATE: July 24, 2014 Internal views of the unit follow: RF Board-Component Side, shields removed RF Board-Component side with shields RF Board-Solder Side Modem Board-Component Side, shields removed Modem Board-Component Side with shields Modem Board-Solder Side Modem and RF Boards mated

TYPE OF EXHIBIT: RF EXPOSURE EVALUATION FCC PART: 1.1310 MANUFACTURER: RITRON, Inc. MODEL: DTXM-460 TYPE OF UNIT: UHF Modem Module FCC ID: AIERIT39-46006 DATE: August 24, 2014 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 frequencies at the 6 watt maximum output power rating of the DTXM-460 per the tune-up procedure outlined in the Maintenance Manual. The unit was then terminated at the antenna port in a quarter-wave 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: DTXM-460 TYPE OF UNIT: UHF Modem Module FCC ID: AIERIT39-46006 DATE: August 24, 2014 PROCEDURE (Continued): 4. The RAM-1545 quarter-wave 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 quarter-wave antenna at the DTXM-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: DTXM-460 TYPE OF UNIT: UHF Modem Module FCC ID: AIERIT39-46006 DATE: August 24, 2014 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: DTXM-460 TYPE OF UNIT: UHF Modem Module FCC ID: AIERIT39-46006 DATE: August 24, 2014 RESULTS FOR EIRP: Frequency Pr Pgen Ps Ga ERP EIRP (MHz) (dBm) (dBm) (dBm) (dBd) (dBm) (watts) 450.025 +3.6 0.0 -27.3 0.1 +30.8 1.97 461.750 +1.8 0.0 -27.7 0.1 +29.4 1.43 469.925 +3.8 0.0 -28.2 0.1 +31.9 1.54 DETERMINING MPE DISTANCE: Power density is related to EIRP: S(W/m 2 ) = EIRP(W)/4r 2 where r is the distance from the source in meters. Rearranging for distance: _________ r = (EIRP/4S) 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: DTXM-460 TYPE OF UNIT: UHF Modem Module FCC ID: AIERIT39-46006 DATE: August 24, 2014 RESULTS FOR MPE: Frequency EIRP Duty Cycle S limit Distance Distance (MHz) (watts) % W/m 2 cm in 450.025 1.97 50 3.00 16.2 6.4 461.750 1.43 50 3.07 13.6 5.4 469.925 1.54 50 3.13 14.0 5.5 RF WARNING STATEMENT: The following statement appears in the Users Manual regarding RF safety: The following statement appears in the Users Manual regarding RF safety: The FCC, with its action in General Docket 79-144, March 13, 1985, adopted a safety standard for human exposure to radio frequency electromagnetic energy emitted by FCC regulated equipment. The DTXM product family has been evaluated for compliance with the maximum exposure limits for RF energy at the maximum power rating of the unit and with the only antenna sold for use with this product by RITRON. To ensure compliance with the General Population/Uncontrolled maximum exposure limits, please observe the following: When the Ritron RAM-1545 remote magnetic mount antenna is used, mount the antenna in a location that will ensure that all persons will be located away from the antenna by the following minimum distances: Model Minimum Distance DTXM-160-0BX6 13.7 in. (34.8 cm) DTXM-260-0BX6 DTXM-460-0BX3 7.9 in. (20.0 cm) DTXM-460-0BX6 7.9 in. (20.0 cm) DTXM-460-0BX9 8.3 in. (21.0 cm) Antennas other than the Ritron RAM-1545 must be tested with the DTXM for RF exposure compliance in the environment in which it is to be used per the FCC’s OET Bulletin 65, Edition 97-01 or Industry Canada RSS- 102.

1 TYPE OF EXHIBIT: TABLE OF CONTENTS FCC PART: 2.1033(c)(14) MANUFACTURER: RITRON, Inc. MODEL: DTXM-460 TYPE OF UNIT: UHF Modem Module FCC ID: AIERIT39-46006 DATE: August 24, 2014 Description Page List of Test Equipment Used 2 Measurement Methods 3 Description of Measurement Facility 4 Radio Frequency Output Power 5 Modulator Response 8 Clipper Filter Response 11 Modulation Limiting Curves 13 Occupied Bandwidth 16 Bandwidth Calculations/Modulation Types 22 Conducted Spurious Emissions 25 Field Strength of Spurious Emissions 29 Frequency Stability vs Temperature 35 Frequency Stability vs Supply Voltage 38 Transient Frequency Behavior 40 2 TYPE OF EXHIBIT: LIST OF TEST EQUIPMENT USED FCC PART: 2.947(d) MANUFACTURER: RITRON, Inc. MODEL: DTXM-460 TYPE OF UNIT: UHF Modem Module FCC ID: AIERIT39-46006 DATE: August 24, 2014 ITEM MAKE/MODEL SERIAL NO. CAL. NEXT CAL. DC Power Supply HQ PS3010U N/A N/A Multimeter HP3466A N/A N/A RF Test Set HP 8920A 3352A03633 10/02/2013 10/02/2014 Spectrum Analyzer Advantest R3265A 75060189 10/02/2013 10/02/2014 Spectrum Analyzer HP 8560E 3720A02980 10/02/2013 10/02/2014 Storage Scope Fluke PM3335 DM630034 N/A N/A Temp. Chamber Delta Design 3900 0-52-R N/A N/A Thermocouple Triplett 320-G/P N/A N/A Log Periodic Electo-Metrics LPA-25 8-102 05/17/2011 04/08/2015 Adjustable Dipoles Electo-Metrics EM-6924 291 04/08/2014 04/08/2015 Gain Horn Emco #3105 3105 10/21/2013 10/21/2015 3 TYPE OF EXHIBIT: MEASUREMENT METHODS FCC PART: 2.947 MANUFACTURER: RITRON, Inc. MODEL: DTXM-460 TYPE OF UNIT: UHF Modem Module FCC ID: AIERIT39-46006 DATE: August 24, 2014 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. 4 TYPE OF EXHIBIT: DESCRIPTION OF MEASUREMENT FACILITY FCC PART: 2.948 MANUFACTURER: RITRON, Inc. MODEL: DTXM-460 TYPE OF UNIT: UHF Modem Module FCC ID: AIERIT39-46006 DATE: August 24, 2014 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. 5 TYPE OF EXHIBIT: RADIO FREQUENCY OUTPUT POWER FCC PART: 2.1046(a) MANUFACTURER: RITRON, Inc. MODEL: DTXM-460 TYPE OF UNIT: UHF Modem Module FCC ID: AIERIT39-46006 DATE: August 24, 2014 PROCEDURE: 1. The DTXM-460 was aligned for transmitter operation at six 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 DTXM-460 by an Astron VS 20M Power Supply. The DTXM-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). 4. Measurements were taken at various power levels between 1 watt and 6 watts. 6 TYPE OF EXHIBIT: RADIO FREQUENCY OUTPUT POWER FCC PART: 2.1046(a) MANUFACTURER: RITRON, Inc. MODEL: DTXM-460 TYPE OF UNIT: UHF Modem Module FCC ID: AIERIT39-46006 DATE: August 24, 2014 RESULTS: 450.025 MHz Carrier Frequency Po (watts) Con. Value Vcon (V) Vd (V) Id (A) 1.0 154 2.58 7.64 0.80 2.0 164 2.74 7.58 1.26 3.0 170 2.84 7.54 1.55 4.0 177 2.96 7.49 1.87 5.0 185 3.09 7.45 2.18 6.0 193 3.23 7.41 2.43 461.750 MHz Carrier Frequency Po (watts) Con. Value Vcon (V) Vd (V) Id (A) 1.0 147 2.45 7.66 0.60 2.0 156 2.61 7.61 1.00 3.0 162 2.71 7.58 1.27 4.0 170 2.84 7.54 1.57 5.0 180 3.00 7.50 1.84 6.0 200 3.34 7.44 2.25 7 TYPE OF EXHIBIT: RADIO FREQUENCY OUTPUT POWER FCC PART: 2.1046(a) MANUFACTURER: RITRON, Inc. MODEL: DTXM-460 TYPE OF UNIT: UHF Modem Module FCC ID: AIERIT39-46006 DATE: August 24, 2014 RESULTS: Cont. 469.925 MHz Carrier Frequency Po (watts) Con. Value Vcon (V) Vd (V) Id (A) 1.0 142 2.38 7.67 0.63 2.0 151 2.53 7.62 1.00 3.0 158 2.64 7.58 1.25 4.0 168 2.81 7.54 1.53 5.0 182 3.04 7.50 1.86 6.0 215 3.59 7.40 2.46 8 TYPE OF EXHIBIT: MODULATOR RESPONSE FCC PART: 2.1047(a) MANUFACTURER: RITRON, Inc. MODEL: DTXM-460 TYPE OF UNIT: UHF Modem Module FCC ID: AIERIT39-46006 DATE: August 24, 2014 PROCEDURE: 1. The DTXM-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 test set was swept in frequency from 100 Hz to 10 kHz and the results noted. Plots are shown for both flat and pre-emphasized audio. The frequency response is independent of carrier frequency, therefore, only the center operating frequency is shown. 9 TYPE OF EXHIBIT: MODULATOR RESPONSE FCC PART: 2.1047(a) MANUFACTURER: RITRON, Inc. MODEL: DTXM-460 TYPE OF UNIT: UHF Modem Module FCC ID: AIERIT39-46006 DATE: August 24, 2014 RESULTS: Flat audio input Frequency (Hz) dB 10 TYPE OF EXHIBIT: MODULATOR RESPONSE FCC PART: 2.1047(a) MANUFACTURER: RITRON, Inc. MODEL: DTXM-460 TYPE OF UNIT: UHF Modem Module FCC ID: AIERIT39-46006 DATE: August 24, 2014 RESULTS: Pre-emphasized audio input dB Frequency (Hz) 11 TYPE OF EXHIBIT: CLIPPER FILTER RESPONSE FCC PART: 2.1047(a) MANUFACTURER: RITRON, Inc. MODEL: DTXM-460 TYPE OF UNIT: UHF Modem Module FCC ID: AIERIT39-46006 DATE: August 24, 2014 PROCEDURE: 1. The audio output of the test set was coupled into the …

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TYPE OF EXHIBIT: TEST SETUP PHOTOS FCC PART: MANUFACTURER: RITRON, Inc. MODEL: DTXM-460 TYPE OF UNIT: UHF Modem Module FCC ID: AIERIT39-46006 DATE: September 19, 2014