B5DM516Wireless Intercom

Telex Model BTR-700 Base Station Owners/Users Manual (Preliminary Information) General Description The Telex Model BTR-700 is a part of the RadioCom ™ wireless intercom series providing all of the Base Station functions. The BTR-700 Base Station is a four channel receive and a one channel transmit unit operating within the 518-608 and 614-746 MHz range (TV Channels 22 to 59). Each base transmitter operates on selected frequencies in the lower half of the frequency range and the receivers operate on selected frequencies in the upper half of the frequency range. The transmit frequency is used to transmit voice and signals to all four of the TR-700 portable (beltworn) units. Each of the base station receive frequencies are used to receive transmissions from each portable unit. Full Duplex (telephone type) operation is used and any portable can talk to any other portable or, any or all of the base receivers can be deselected allowing the mobiles to monitor only. Independent receive channels can be enabled or disabled by front panel pushbuttons. The presence or absence of a portable transmit is displayed on the LCD Display. Two independent 2 wire or 4 wire intercom units can be connected to the base station. Each intercom has independent input and output level adjustments. An Auxiliary connector is provided for general audio use and also has input and output level controls. A local headset connector is provided with volume, microphone gain control and a talk/mute switch. A front panel readout on the base station indicates the frequency or channel that is in current use. A separate menu is used to select one of several pre-programmed frequency sets or each base can be programmed to special frequencies by the user. BTR-700 Users Manual Page 2 The BTR-700 has a built-in 100 to 240 VAC 50/60 Hz power supply. Power is controlled by the ON/OFF front panel switch. Half (1/2) Wave antennas are supplied with the base station. These antennas are ground independent. Transmit (RF) power is switchable on the rear panel from 50mW (maximum) to 5 mW (minimum). The transmit power can also be turned off for use where several bases are required that only use one transmit frequency. The low power setting can be useful where multi-system intermod could occur or when it is desired to reduce the base transmitter range. An Intercom (I/C) termination switch on the rear panel allows selecting Telex, RTS or ClearCom connections. The Intercom has XLR and RJ Connectors on the rear panel in order to “Loop-Thru” to inter-connect several bases together. The Auxilliary Audio Input and Output connectors are “one way” ports that are useful for stand-alone applications. Specifications: Input Power...........................................100-240 VAC, 50-60 Hz. Transmitter: Frequency Range.......................518 to 608 MHz. ( within 3 TV Channels, 18 MHz blocks) RF Channels, one, frequency agile, 25 KHz steps. RF Power Output........................100 mW Nominal, Switchable down to 10 mW Nominal. Frequency Deviation....................40 KHz Peak. BTR-700 Users Manual Page 3 Frequency Stability........................0.005% Modulation Limiter..........................Peak-Responding Compressor Audio Frequency Response...........200 Hz to 10 KHz Nominal. Microphone Input Level.................7.75 mV for 40 KHz Deviation. Receiver: Frequency Range......................... 614 to746 MHz. (within 3 TV Channels, 18 MHz Blocks) RF Channels, four, frequency agile, 25 KHz steps. Sensitivity............................ 0.8 uV for 12 dB SINAD Squelch (internal)........................Open at 20 dB SINAD. Modulation Acceptance..................40 KHz Nominal. Audio Frequency Response..............200 Hz to 10 KHz Nominal. Audio Output (local headset)..............200 mW, 600 Ohm Load. Intercom: One intercom XLR Loop-Thru and a 4 Wire “RJ11” Loop-Thru wire connection is available. The user can select either 2 wire or 4 wire (but not both) from the front panel. The input and output levels are independently adjustable from the front panel. An Auxiliary XLR Input and XLR Output is also available. Local Headset: A 4 wire XLR connector is located on the front panel with Headset Volume, Microphone Gain Control, and Press to Talk/Lock to Talk switch. BTR-700 Users Manual Page 4 FCC LICENSING The Telex BTR-700 Transmitter/Receiver is Type Accepted Under Federal Communications Commission Part 74. Licensing of Telex equipment is the User’s responsibility and licensibility depends on the user’s classification, user’s application, and frequency selected. Telex strongly urges the user to contact the appropriate telecommunications authority for any desired clarification. Caution: Changes or modifications made by the user could void the user’s authority to operate the equipment. ++++++++++++++++++++++++++++++++++++++++++++++++++++++ Industry Canada Information: The Telex Model BTR-700 approved under RSS123. CAUTION: Changes or modifications made by the user could void the users authority to operate the equipment. Operation of this device is subject to the following two conditions: (1) This device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. BTR-700 Users Manual Page 5 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ Mandatory Safety Instructions to Base Station Installers and Users 1. Use only manufacturer or dealer supplied antenna. Antenna minimum safe distance, as calculated from FCC requirements, is 4.8cm. However, the FCC default for the minimum safe distance is 20cm. Antenna gain: zero dBd referenced to a dipole. 2. The FEDERAL COMMUNICATIONS COMMISSION has adopted a safety standard for human exposure to RF (Radio Frequency) energy, which is below the OSHA (Occupational Safety and Health Act limits. 3. To comply with current FCC RF Exposure limits, the antenna must be installed at or exceeding the minimum safe distance show here, and…

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RECEIVE HIGH ON NORMOFF TRANSMITPOWER I/C TELEX CLEARCOM RTS INTERCOM 2 WIRE L O O P T H R U 4 WIRE AUXILAR Y AUDIO INPUT OUTPUT POWER 100-240 V AC 50-60 Hz TRANSMIT BTR-700 TELEX COMMUNICA TIONS INC. MADE IN U.S.A. FCC ID: B5DM516 CANADA FCC ID LABEL/LOCATION INFO

BTR-700 Transmitter Theory of Operation A. Mixer Audio from various inputs arrive at the transmit mixer U22A where they are summed into one audio signal. B. Modulation Limiter U23A is configured as a variable gain amplifier and U24 is configured as a window detector. When the audio fed from U24 exceeds the pre-set threshold, U24A pulls low on negative peaks and U24B pulls low on positive peaks. This discharges C48 and reduces the gain of U23A until the input to U24 is just at the threshold of limiting. C. Compressor U23C is a linear compressor that is used to improve the system signal to noise ratio. A complimentary expander is used at the receiver. D. Pre-emphasis U24B provides pre-emphasis which begins at 100 microseconds and ends at 15 microseconds. The output of U23B feeds the modulation limiter E. Low Pass Filter U23D is a 3 pole low pass filter with a cutoff frequency of 10 KHz. F. PLL HY801 is a VCO operating at the transmitter output frequency. U802 is a phase locked loop that controls HY801. U802 is serially loaded with frequency data . The modulating signal is fed into the loop via VR801 which is used to set the frequency deviation. G. Output Amplifiers Q802, 803, 807 and 809 amplify the signal from HY801 and provide reverse isolation. Q806 is used to turn these stages on only after the loop has achieved lock. C831, 832, 833, L809 and L810 provide impedance matching and harmonic suppression. END BTR-700 Transmitter Theory of Operation A. Mixer. Audio from various inputs arrive at the transmit mixer U22A where they are summed into one signal. B. Modulation Limiter. U23A is configured as a variable gain amplifier and U24 is Configured as a window detector. Telex Model BTR-700 Technical Specifications Input Power...........................................100-240 VAC, 50-60 Hz. Transmitter: Frequency Range.......................518 to 608 MHz. ( within 3 TV Channels, 18 MHz blocks) RF Channels, one, frequency agile, 25 KHz steps. RF Power Output........................50 to 100 mW Typical, Switchable down to 5 to 10 mW Typical. Frequency Deviation....................40 KHz Peak. Frequency Stability........................0.005% Modulation Limiter..........................Peak-Responding Compressor Audio Frequency Response...........200 Hz to 10 KHz Nominal. Microphone Input Level.................7.75 mV for 40 KHz Deviation. Receiver: Frequency Range......................... 614 to 746 MHz. (within 3 TV Channels, 18 MHz Blocks) RF Channels, four, frequency agile, 25 KHz steps. Sensitivity............................ 0.8 uV for 12 dB SINAD Squelch (internal)........................Open at 20 dB SINAD. Modulation Acceptance..................40 KHz Nominal. Audio Frequency Response..............200 Hz to 10 KHz Nominal. Telex BTR-700 Specifications Page 2 Audio Output (local headset)..............200 mW, 600 Ohm Load. Intercom: One intercom XLR Loop-Thru and a 4 Wire “RJ11” Loop-Thru wire connection is available. The user can select either 2 wire or 4 wire (but not both) from the front panel. The input and output levels are independently adjustable from the front panel. An Auxiliary XLR Input and XLR Output is also available. Local Headset: A 4 wire XLR connector is located on the front panel with Headset Volume, Microphone Gain Control, and Press to Talk/Lock to Talk switch. Approvals: The Telex BTR-700 Transmitter/Receiver is Type Accepted Under Federal Communications Commission Part 74. FCC ID: B5DM516 The Telex BTR-700 is also approved under Industry Canada RSS123. END

879405-1 ITEM NEW QTY TYPEDESCRIPTIONPART NO.DESIGNATOR 112CAP1uF TANT A102877053T C469, C477, C569, C577, C669, C677, C769, C777, C481, C581, C681, C781 215CAP.001uF 0805102879157T C334, C344, C346, C436, C451, C460, C536, C551, C560, C636, C651, C660, C736, C751, C760 324CAP12pF 080572341114T C403, C410, C418, C425, C441, C453, C503, C510, C518, C525, C541, C553, C603, C610, C618, C625, C641, C653, C703, C710, C718, C725, C741, C753 432CAP100pF 080572341125T C332, C333, C335, C337, C402, C414, C417, C429, C455, C457, C461, C502, C514, C517, C529, C555, C557, C561, C602, C614, C617, C629, C655, C657, C661, C702, C714, C717, C729, C755, C757, C761 54CAP100pF 1206102879204TC459, C559, C659, C759 61CAP 100pF NFM 40 R FEEDTHRU 7233923TC326 787CAP.1uF 0805102881186T C330, C336, C343, C430, C432, C434, C435, C439, C444, C456, C458, C464, C466, C467, C468, C470, C471, C472, C474, C478, C484, C486, C487, C489, C530, C532, C534, C535, C539, C544, C556, C558, C564, C566, C567, C568, C570, C571, C572, C574, C578, C584, C586, C587, C589, C630, C632, C634, C635, C639, C644, C656, C658, C664, C666, C667, C668, C670, C671, C672, C674, C678, C684, C686, C687, C689, C730, C732, C734, C735, C739, C744, C756, C758, C764, C766, C767, C768, C770, C771, C772, C774, C778, C784, C786, C787, C789 82CAP82pF 080572341124TC338, C342 93CAP47PF 080572341121TC339, C340, C341 101CAP.0047uF 0805102881146TC345 117CAP3pF 0805102879178TC347, C348, C349, C473, C573, C673, C773 1216CAP39pF 080572341120T C401, C413, C416, C428, C501, C513, C516, C528, C601, C613, C616, C628, C701, C713, C716, C728 1320CAP6.8pF 080572341111T C404, C409, C419, C424, C440, C504, C509, C519, C524, C540, C604, C609, C619, C624, C640, C704, C709, C719, C724, C740 1488CAP .01uF 0805102881150T C405, C406, C411, C412, C415, C420, C421, C426, C427, C431, C433, C442, C443, C446, C447, C454, C465, C475, C482, C485, C488, C491, C505, C506, C511, C512, C515, C520, C521, C526, C527, C531, C533, C542, C543, C546, C547, C554, C565, C575, C582, C585, C588, C591, C605, C606, C611, C612, C615, C620, C621, C626, C627, C631, C633, C642, C643, C646, C647, C654, C665, C675, C682, C685, C688, C691, C705, C706, C711, C712, C715, C720, C721, C726, C727, C731, C733, C742, C743, C746, C747, C754, C765, C775, C782, C785, C788, C791 This drawing, written description or specification Is a proprietary product of TELEX, Lincoln, NE, and shall not be released, disclosed, nor duplicated without the written permission of TELEX. Telex Communications INC. Lincoln, Nebraska USA APPROVALS:DR BY: SMH DATE: 10/27/00 PROD:___ DATE:___ CHKD BY:SMH DATE:_03/22/01 APPD BY:CC DATE:_03/22/01 879405 REV LEVEL: PCB ASSY, BTR-700/800 RECEIVER SMT TITLE: PART NO: B Page 2 of 6 879405-1 ITEM NEW QTY TYPEDESCRIPTIONPART NO.DESIGNATOR This drawing, written description or specification Is a proprietary product of TELEX, Lincoln, NE, and shall not be released, disclosed, nor duplicated without the written permission of TELEX. Telex Communications INC. Lincoln, Nebraska USA APPROVALS:DR BY: SMH DATE: 10/27/00 PROD:___ DATE:___ CHKD BY:SMH DATE:_03/22/01 APPD BY:CC DATE:_03/22/01 879405 REV LEVEL: PCB ASSY, BTR-700/800 RECEIVER SMT TITLE: PART NO: B 158CAP1.2pF 0603723482102TC407, C422, C507, C522, C607, C622, C707, C722 168CAP820pF 080572341136TC408, C423, C508, C523, C608, C623, C708, C723 174CAP3.3pF 08057234117TC437, C537, C637, C737 184CAP10uF TANT A102877047TC438, C538, C638, C738 194CAP10pF 080572341113TC445, C545, C645, C745 208CAP150pF 080572341127TC448, C449, C548, C549, C648, C649, C748, C749 214CAP 100uF ALUM 6.3MM 102884116TC450, C550, C650, C750 222CAP27PF 080572341118TC351, C352 234CAP2700pF 0805102881143TC452, C552, C652, C752 244CAP15pF 080572341115TC462, C562, C662, C762 254CAP62pF 080572341149TC463, C563, C663, C763 264CAP.0018uF 080572341140TC476, C576, C676, C776 278CAP.047uF 0805102881180TC479, C480, C579, C580, C679, C680, C779, C780 284CAP2200pF 080572341141TC483, C583, C683, C783 2940DIODE MMBV3401 SOT-23 760393T D401, D402, D403, D404, D405, D406, D407, D408, D409, D410, D501, D502, D503, D504, D505, D506, D507, D508, D509, D510, D601, D602, D603, D604, D605, D606, D607, D608, D609, D610, D701, D702, D703, D704, D705, D706, D707, D708, D709, D710 304VARI CAP SMV1145-079760298TD411, D511, D611, D711 314DIODETMPD914 SOT-2358711000TD412, D512, D612, D712 321IND2.2uH 43FS7234245TL312 3340IND5.6uH 100872402218T L401, L402, L405, L406, L407, L408, L411, L412, L413, L414, L501, L502, L505, L506, L507, L508, L511, L512, L513, L514, L601, L602, L605, L606, L607, L608, L611, L612, L613, L614, L701, L702, L705, L706, L707, L708, L711, L712, L713, L714 344IND120nH 100872339715TL416, L516, L616, L716 354IND39uH 100872402228TL417, L517, L617, L717 364IND1mH 43FS72342437TL419, L519, L619, L719 371TRANSNE46134 SOT-89760395TQ304 3812TRANS MMBT3906 SOT-23 54716200T Q401, Q402, Q407, Q501, Q502, Q057, Q601, Q602, Q607, Q701, Q702, Q707 398TRANSBFG540 SOT-143760209TQ403, Q404, Q503, Q504, Q603, Q604, Q703, Q704 408TRANS FMMT5179 SOT-23 760180TQ405, Q505, Q605, Q705, Q408, Q508, Q608, Q708 414TRANS MMBT3904 SOT-23 54671200TQ406, Q506, Q606, Q706 424RES5.6K OHM 0805102506562TR447, R547, R647, R747 4352RES470 OHM 0805102506471T R401, R402, R407, R408, R412, R413, R414, R415, R421, R422, R428, R439, R465, R501, R502, R507, R508, R512, R513, R514, R515, R521, R522, R528, R539, R565, R601, R602, R607, R608, R612, R613, R614, R615, R621, R622, R628, R639, R665, R701, R702, R707, R708, R712, R713, R714, R715, R721, R722, R728, R739, R765 Page 3 of 6 879405-1 ITEM NEW QTY TYPEDESCRIPTIONPART NO.DESIGNATOR This drawing, written description or specification Is a proprietary product of TELEX, Lincoln, NE, and shall not be released, disclosed, nor duplicated without the written permission of TELEX. Telex Communications INC. Lincoln, Nebraska USA APPROVALS:DR BY: SMH DATE: 10/27/00 PROD:___ DATE:___ CHKD BY:SMH DATE:_03/22/01 APPD BY:CC DATE:_03/22/01 879405 REV LEVEL: PCB ASSY, BTR-700/800 RECEIVER SMT TITL…

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BTR-700 Transmit Alignment 1. Terminate the transmitter into a Modulation/Signal Analyzer. 2. Connect an audio source to pins 1 (ground) and 2 (audio in) of the headset connector. Set the level to 15 mV RMS and the frequency to 1.0 KHz. 3. Apply AC Power to the BTR-700. 4. Adjust the Mic Gain control to maximum. 5. Press the talk button once so that Talk/Overmod LED lights. 6. Adjust VR801 for +/- 40 KHz Deviation. 7. Adjust VC901 for the correct Frequency. 8. Check the transmitter Power. 50 mW typical. Note: No transmit power alignment is necessary. The frequency is generated by a PLL/VCO and the power amplifier is broadband with fixed filters. Remove AC Power. End. BTR-700 Active Devices Designator Part Number Function Q801 VP0610 Switch Q802 BFG540X Amplifier Q803 BFG540X Amplifier Q804 MMBT3906 Current Source Q805 MMUN2112 Switch Q806 MMUN2212 Switch Q807 BFG540X Amplifier Q808 MMBT3906 Current Source Q809 BFG540X Amplifier U801 TC55RP500 Regulator U802 TRF2050 Synthesizer HY801 TBDAO VCO END

FCC ID: B5DM516 MFA p0160004, d0160018 Date of Report: Date of Submission: June 22, 2001 August 1, 2001 Federal Communications Commission Via: Electronic Filing Attention: Authorization & Evaluation Division Applicant: Telex Communications, Inc. Equipment: BTR-700 FCC ID: B5DM516 FCC Rules: Radiofrequency Radiation Exposure Limits 47 CFR 1.1310 CALCULATION MPE - Mobiles Fixed Based Station x Gentlemen: On behalf of the Applicant, enclosed please find the Supplemental Test Data Report, the whole for Environmental Assessment (MPE) of the referenced equipment as shown. We trust the same is in order. Should you need any further information, kindly contact the writer who is authorized to act as agent. Sincerely yours, Morton Flom, P. Eng. enclosure(s) cc: Applicant MF/cvr FCC ID: B5DM516 MFA p0160004, d0160018 ENVIRONMENTAL ASSESSMENT for FIXED BASE STATION for FCC ID: FCC ID: B5DM516 Model:BTR-700 to FEDERAL COMMUNICATIONS COMMISSION 47 CFR 1.1310 (MPE) Radiofrequency Radiation Exposure Limits DATE OF REPORT: June 22, 2001 ON THE BEHALF OF THE APPLICANT: Telex Communications, Inc. AT THE REQUEST OF: P.O. 233393 Telex Communications, Inc. 8601 E. Cornhusker Highway P.O. Box 5579 Lincoln, NE 68505-5579 Attention of: Charles E. Conner, Project Engineer (402) 467-5321; FAX: -3279 E-mail: [email protected] SUPERVISED BY: Morton Flom, P. Eng. FCC ID: B5DM516 MFA p0160004, d0160018 TABLE OF CONTENTS RULEDESCRIPTIONPAGE . Test Report 1 . Identification of the Equipment Under Test 2 . Standard Test Conditions and Engineering Practices 4 1.1310 Environmental Assessment 5 FCC ID: B5DM516 MFA p0160004, d0160018 PAGE NO.1of5. Required information per ISO/IEC Guide 25-1990, paragraph 13.2: a) TEST REPORT (SUPPLEMENTAL) b) Laboratory: (FCC: 31040/SIT) (Canada: IC 2044) M. Flom Associates, Inc. 3356 N. San Marcos Place, Suite 107 Chandler, AZ 85225 c) Report Number: d0160018 d) Client: Telex Communications, Inc. 8601 E. Cornhusker Highway P.O. Box 5579 Lincoln, NE 68505-5579 e) Identification: BTR-700 FCC ID: B5DM516 Description: Wireless Intercom f) EUT Condition: Not required unless specified in individual tests. g) Report Date: June 22, 2001 EUT Received: June 8, 2001 h, j, k): As indicated in individual tests. i) Sampling method: No sampling procedure used. l) Uncertainty: In accordance with MFA internal quality manual. m) Supervised by: Morton Flom, P. Eng. n) Results: The results presented in this report relate only to the item tested. o) Reproduction: This report must not be reproduced, except in full, without written permission from this laboratory. FCC ID: B5DM516 MFA p0160004, d0160018 PAGE NO.2of5. IDENTIFICATION OF THE EQUIPMENT UNDER TEST (EUT) NAME AND ADDRESS OF APPLICANT: Telex Communications, Inc. 8601 E. Cornhusker Highway P.O. Box 5579 Lincoln, NE 68505-5579 MANUFACTURER: Telex Communications, Inc. FCC ID: B5DM516 MODEL NO: BTR-700 DESCRIPTION: Wireless Intercom TYPE OF EMISSION: 92K0F3E FREQUENCY RANGE, MHz: 518 to 608 POWER RATING, Watts: 0.100 Conducted 0.0649 Radiated Switchable Variable x N/A MODULATION: AMPS TDMA CDMA x OTHER ANTENNA: HELICAL MONOPOLE WHIP x OTHER NOTE: For RF Safety test antenna gain taken at the upper range of expected gain (i.e. 0 dBd) and RF Power set to highest nominal power across all channels. FCC ID: B5DM516 MFA p0160004, d0160018 PAGE NO.3of5. M. Flom Associates, Inc. is accredited by the American Association for Laboratory Association (A2LA) as shown in the scope below. "This laboratory is accredited by the American Association for Laboratory Accreditation (A2LA) and the results shown in this report have been determined in accordance with the laboratory's terms of accreditation unless stated otherwise in the report." Should this report contain any data for tests for which we are not accredited, or which have been undertaken by a subcontractor that is not A2LA accredited, such data would not covered by this laboratory's A2LA accreditation. FCC ID: B5DM516 MFA p0160004, d0160018 PAGE NO.4of5. STANDARD TEST CONDITIONS and ENGINEERING PRACTICES Except as noted herein, the following conditions and procedures were observed during the testing: In accordance with ANSI C63.4-1992/2000, section 6.1.9, and unless otherwise indicated in the specific measurement results, the ambient temperature of the actual EUT was maintained within the range of 10°to 40°C (50°to 104°F) unless the particular equipment requirements specify testing over a different temperature range. Also, unless otherwise indicated, the humidity levels were in the range of 10% to 90% relative humidity. Prior to testing, the EUT was tuned up in accordance with the manufacturer's alignment procedures. All external gain controls were maintained at the position of maximum and/or optimum gain throughout the testing. Measurement results, unless otherwise noted, are worst case measurements. FCC ID: B5DM516 MFA p0160004, d0160018 PAGE NO.5of5. Name of test:Environmental Assessment Specification:FCC: 47 CFR 1.1307, 1.1310, 1.1311, 2.1091 Description, EUT: See page 2 of Test Report Calculation of Maximum Safe Distance R cm/meters = (p/(4πx limit)) 1/2 Limit = f/1500 = 518/1500 mw/cm 2 = 0.3453 mw/cm 2 R = 0.038 meters = 3.8 cm SUPERVISED BY: Morton Flom, P. Eng. FCC ID: B5DM516 MFA p0160004, d0160018 (The following will be placed in the Instruction Manual) MANDATORY SAFETY INSTRUCTIONS TO INSTALLERS & USERS Use only manufacturer or dealer supplied antenna. Antenna Minimum Safe Distance: 20 cm . Antenna Gain: zero dBd referenced to a dipole. The Federal Communications Commission has adopted a safety standard for human exposure to RF (Radio Frequency) energy which is below the OSHA (Occupational Safety and Health Act) limits. Antenna Mounting:The antenna supplied by the manufacturer or radio dealer must not be mounted at a location such that during radio transmission, any person or persons can come closer than the above indicated minimum safe distance to the antenna i.e. 20 cm. To comply with current FCC RF…

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S4:1LN475 R278 TP36TP37TP38TP39TP40 1UF C170 + C169 1UF + TP22TP23TP24TP25TP26 22UF C168 + 10PF C44 VR4 20K 2.2K R86 R267475 P17 LN R266 0 R265 0 0 R264 LN C16 470UF + D2 SK34 VR1 20K TP14 1UF C59 + C166 .01 J11:1 J12:1 C125 1UF + 26.7K R229 33.2K R228 22PF C124 C128 1UF + P30:4 LN C113 1UF + LM393 U42:B 6 5 8 7 39.2K R202 22.1K R203 39.2K R204 LM393 U42:A 4 2 3 1 R206 100K TP110 100K R205 TP165 10UF C126 + C121 1UF + TP164 C51 1UF + C56 10UF + 1UF C58 + R111 26.7K R110 33.2K 1UF C55 + C54 22PF 10UF C33 + 2.2UF C32 + SA575 U10:A 9 4 6 7 8105 20 3.9K 10K10K G C157 100PF 100PF C156 C24 1UF + U9:B SA575 1 2 3 U9:A SA575 7 6 4 9 G 10K10K 3.9K 20 5108 C147 1UF + C148 1UF + TP122 LN S4:2 MMBT3904 Q18 10K R249 C144 10UF + C143 1UF + TP152TP151TP150TP149 C19 .01UF LM556 U7:A 6 2 1 5 37 4 R R R RQ SQ 8.25K R41 1.5K R42 .001UF C20 TP16 C21 1UF + MMBZ5240 D4 TP17 LN 470UF C22 + C137 1UF + 1K R242 C136 1UF + BAV99 D9 C135 1UF + TP141TP142TP143TP144TP145TP146TP147TP148 LN P22:1 LN P23:1 LN P24:1 P25:1 LN P21:1 LN P16:5 LN P16:4 LN LN P16:3 LN P16:2 TP82 U39:A 4053 11 1312 687 1614 TP84 TP83 R15410K Q10 MMBT3904 22.1K R25 U2:B 4053 1 2 15 10 LN P13:5 LN P13:4 LN P13:3 LN P15:3 LN P14:5 LN P14:4 LN P14:3 LN P14:2 LN P13:2 TP18 33.2K R34 R40 1.5K 6.81K R39 .001UF C17 6.81K R37 Q8 IRFR9024N LM556 U7:B 8 12 13 9 1014 11 R R R RQ SQ C35 1UF + TP105 TP104 J10-5 LN J10-2 LN TP71 TP72 J5-2 LN J5-5 LN TP86 100K R161 C86 1UF + 100K R160 LM393 U33:A 4 2 3 1 LM393 U33:B 6 5 8 7 10K R120 TP68 TP44TP45TP46TP47 TP30TP31TP32TP33 TP11 TP79 FB9 R91 100K J5-4 LN J5-3 LN TP70 TP69 LN J10-4 LN J10-3 TP116 TP115 TP59 TP67TP66 TP109 FB7 39.2K R150 39.2K R151 TP81 TP80 FB5 TP78 TP77TP76 TP75 TP74 TP91 FB13 TP89 FB15 FB14 R170 100K C91 10UF + TP90 TP88 TP85 TP107 TP108 TP103 TP102 TP92 TP73 TP111 TP113TP112 TP106 TP114 TP101 TP98 TP100TP99 TP95TP94 TP96 TP93 TP65 TP63 TP61 TP57 TP58 LN J14:1 FB10 R92 100K TP55 TP54 TP51 TP49 TP56 U17:C 4053 4 5 3 9 TP43 TP29 TP42 TP41 TP27 TP9 TP7 TP8 TP6 TP5 TP4 TP3 TP2 TP1 TP13 TP12 TP64 TP60 TP50 TP10 U26:A 4053 876 14 13 12 11 16 C7 10UF + 1K R10 100PF C8 LN P16:1 10K R220 R136 10K D8 DL4004 LN K2:A 4.99K R195 FB38 FB37 U20:A LM833 1 2 3 4 C11010PF R192 39.2K R193 39.2K R1944.99K 0 R241 0 R238 0 R240 0 R239 LN S1:B LN K2:C LN 22UF C102 + 0R236 0 R237 U17:A 4053 876 14 13 12 11 16 U17:B 4053 1 2 15 10 4053 U16:C 9 3 5 4 U2:A 4053 876 14 13 12 11 16 4053 U4:A 786 1213 11 1416 MMBT3904 Q12 4.75K R119 10K R207 MMBT3904 Q11 4.75K R208 100K R149 10K R118 10PF C49 10KR96 10K R95 LN P13:1 LN P14:1 10K R209 U20:B LM833 7 8 6 5 10KR143 U30:A LM833 1 2 3 4 C8010PF R14410K 10K R142 10PF C79 10K R141 U30:B LM833 7 8 6 5 10K R102 10KR103 10PF C50 10K R104 R105 1.3K LM833 U22:A 4 3 2 1 U23:D SA575 19 18 17 .001UF C63 .01UF C62 .01UF C61 6.81K R117 4.75K R116 2.21K R115 SA575 U23:B 3 1 2 10K R113 1500PF C60 56.2K R114 56.2K R112 LM833 U22:B 5 6 8 7 C48 10PF R9710K VR3 5K LM833 U38:A 4 2 3 1 6.81K R190 .0047UF C106 18.7K R191 .0015UF C107 LM833 U38:B 6 5 8 7 390PF C105 .022UF C104 7.68K R189 3.92K R188 U37:B LM833 7 8 5 6 C103 10PF 4053 U39:B 15 2 1 10 10K R187 R181 22.1K 1UF C100 + R174 20K R134 20K C73 1UF + 47.5K R175 MMBT3904 Q13 301 R178 10K R210 C115 1UF + MMBT3904 Q14 301 R185 R184 20K 56PF C99 47.5K R186 R211 100K R212 100K 10UF C116 + LM833 U36:B 6 5 8 7 LM833 U37:A 4 3 2 1 C114 10PF U39:C 4053 4 5 3 9 47.5K R213 U43:B LM833 7 8 6 5 10KR214 10KR215 10PFC117 LM833 U43:A 4 3 2 1 C97 1UF + 10PF C64 U25:A LM833 1 2 3 4 U26:C 4053 4 5 3 9 1UF C65 + R121 10K 47.5K R122 U27:B LM833 7 8 6 5 10KR123 10KR124 10PFC66 LM833 U27:A 4 3 2 1 U28:A LM833 1 2 3 4 C71 10PF R129 39.2K R132 4.99K R130 39.2K R1314.99K LM833 U25:B 6 5 8 7 22.1K R133 C72 1UF + LN J6 1 3 2 LN J8 1 3 2 LN S1:A LN T1 LN K2:B LN 22UF C96 + LN S1:D LN T2 LN S1:C LN 100UF C101 + LN 100UF C95 + R177 121 R182 121 U36:A LM833 1 2 3 4 C98 100PF C93 100PF R180 20K R179 20K LN J2 12 3 R137 3.92K R138 7.68K C75 .022UF C76 390PF U29:A LM833 1 3 2 4 R139 6.81K U29:B LM833 7 8 5 6 C78 .0015UF R140 18.7K C77 .0047UF 10PF C74 U26:B 4053 1 2 15 10 U35:A LM833 1 2 3 4 R176 20K R173 20K 56PF C94 U35:B LM833 7 8 5 6 5K VR2 3.32K R135 100K R171 100K R172 C92 10UF + 3.32K R196 LM833 U41:B 5 6 8 7 R197 10K R198 10K 10KR201 10PFC112 LM833 U41:A 4 3 2 1 R20010K R9910K R98 10K R19910K 10K R101 R100 10K R126 301 10UF C67 + 10UF C68 + R125 301 R216 301 R217 301 10UF C118 + 10UF C119 + LN J3 2 3 1 Q9 MMBT3904 LNK1 D7 DL4004 R94 10K C111 10PF C90 10UF + 301 R167 U34:B LM833 7 8 6 5 10KR165 10KR166 10PFC89 LM833 U34:A 4 3 2 1 C88 10PF 10K R162 10KR163 10K R164 U31:A LM393 1 3 2 4 R147 39.2K R146 22.1K R145 39.2K U31:B LM393 7 8 5 6 1UF C81 + R148 100K 10K R221 10K R222 FB31 FB35 FB34 FB36 LN J9 3 21 FB33 FB32 FB30 FB29 LN S1:E LN J7 12 3 FB24 FB25 FB26 FB28 FB23 FB22FB21 LN S1:F FB27 FB19 FB20 FB11 FB12 FB6 FB8 LN J4 12 3 301 R168 FB16 LM833 U32:A 4 3 2 1 10PF C84 22.1K R152 22.1K R153 39.2K R159 22.1K R158 39.2K R157 U32:B LM833 7 8 6 5 10K R156 10PF C85 R155 10K R169 100K FB17 R127 100K FB18 R128 100K FB39 R218 100K FB40 R219 100K LN J1-2 LN J1-3 LN J1-4 FB1 LN J1-1 FB3 FB4 C41 1UF + C40 1UF + 49.9K R69 30.1K R71 20K R70 LM833 U19:B 6 5 8 7 LM833 U19:A 4 2 3 1 10K R93 BAV70 D6 BAV70 D5 U14:C 4053 4 5 3 9 U13:A 4053 876 14 13 12 11 16 U15:A 4053 876 14 13 12 11 16 4053 U15:B 15 2 1 10 U15:C 4053 4 5 3 9 4053 U16:A 12 13 14 678 16 11 4053 U16:B 15 2 1 10 4053 U13:B 15 2 1 10 U11:C 4053 4 5 3 9 4053 U14:A 12 13 14 678 16 11 4053 U14:B 15 2 1 10 U12:B 4053 1 2 15 10 U12:A 4053 876 14 13 12 11 16 4053 U13:C 9 3 5 4 U11:B 4053 1 2 15 10 U11:A 4053 876 14 13 12 11 16 LM833 U18:B 5 6 8 7 R68 10K C39 10PF R6410K R6510K R6610K R67 10K 10K R62 10KR61 10KR60 10KR59 LM833 U18:A 4 3 2 1 10K R85 10KR84 10KR83 10K R82 R89 301 10UF C46 + R90 301 10UF C47 + 10K R80 10KR79 10KR78 10KR77 10PF C43 10KR81 10K R75 10KR74 10KR73 10KR72 10KR76 10PF C42 10K R63 10PF C38 LM833 U21:B 5 6 8 7 U21:A LM833 1 2 3 4 10K R87 10PF C45 10K R88 LM833 U44:B 5 6 8 7 U40:A LM833 1 2 3 4 U5 MC34119 3 4 6 8 …

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FCC ID: B5DM516 MFA p0160004, d0160016 Date of Report: Date of Submission: June 22, 2001 August 1, 2001 Federal Communications Commission Via: Electronic Filing Attention: Authorization & Evaluation Division Applicant: Telex Communications, Inc. Equipment: BTR-700 FCC ID: B5DM516 FCC Rules: 74H Gentlemen: On behalf of the Applicant, enclosed please find Application Form 731, Engineering Test Report and all pertinent documentation, the whole for approval of the referenced equipment as shown. Filing fees are attached. We trust the same is in order. Should you need any further information, kindly contact the writer who is authorized to act as agent. Sincerely yours, Morton Flom, P. Eng. enclosure(s) cc: Applicant MF/cvr FCC ID: B5DM516 MFA p0160004, d0160016 LIST OF EXHIBITS (FCCCERTIFICATION(TRANSMITTERS) - REVISED 9/28/98) APPLICANT: Telex Communications, Inc. FCC ID: B5DM516 BY APPLICANT: 1. LETTER OF AUTHORIZATION 2. IDENTIFICATION DRAWINGS, 2.1033(c)(11) xLABEL xLOCATION OF LABEL xCOMPLIANCE STATEMENT xLOCATION OF COMPLIANCE STATEMENT 3. PHOTOGRAPHS, 2.1033(c)(12) x 4. DOCUMENTATION: 2.1033(c) (3) USER MANUAL x (9) TUNE UP INFO x (10) SCHEMATIC DIAGRAM x (10) CIRC…

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