QKE-INCA-TXHAINCA TXFH-RC Wireless Audio Transmitter

#1015QKE Page 1 of 9 INCA TXFH-RC WIRELESS AUDIO TRANSMITTER Version 1.02 COMPANY CONFIDENTIAL Spectronic Denmark A/S Skindbjergvej 44 DK-8500 Grenaa Telephone: +45 86 38 72 22 Fax: +45 86 38 77 04 www.spectronic-denmark.com [email protected] #1015QKE Page 2 of 9 Table of contents 1 INCA TXFH-RC WIRELESS AUDIO TRANSMITTER.............................. 4 1.1 Introduction....................................................................................... 4 1.2 System Concept ............................................................................... 5 1.2.1 General ..................................................................................... 5 1.2.2 Different settings ....................................................................... 5 1.2.3 Application Note ........................................................................ 6 1.2.4 Wire connection ........................................................................ 7 1.2.5 Transmitter ................................................................................ 7 1.2.6 Remote Control Receiver.......................................................... 7 1.2.7 Remote Control Upcodes – TXFH-RC VHF ............................. 8 1.3 Technical specifications ................................................................... 9 #1015QKE Page 3 of 9 Transmitters #1015QKE Page 4 of 9 1 INCA TXFH-RC WIRELESS AUDIO TRANSMITTER 1.1 Introduction This document describes the general functions and performance of the Spectronic INCA TXFH-RC transmitter. Information on items of a specific delivery is to be found in a separate document, stating TX frequencies and remote control address codes of the individual units. DC Supply Microphone Antenna #1015QKE Page 5 of 9 1.2 System Concept 1.2.1 General The INCA TXFH-RC is a series of wireless audio, remote controllable, small sized VHF transmitters intended for concealed room monitoring etc. The TX unit comes with flying leads for the battery connection and the antenna terminal has a female MMCX-connector. The TX unit is deliverable with external microphone. Note: The special functions/upcodes will only be available, if using an X-IDER 4096 TX. Please refer to Section on Remote Control Upcodes – TXFH-RC VHF. 1.2.2 Different settings Sleep mode on / off: The transmitters can be switched into sleep-mode. In sleep-mode, the current consumption is only app. 200 uA, which maximizes the lifetime of the battery more than 1000 times. In sleep-mode the receiver only goes on the air in app. 30 msec. for every 2.5 seconds to look for a valid code transmission VOX mode on / off: At the expense of a little higher current consumption (app. 300 uA), the transmitter can be switched into VOX-mode, meaning that the transmitter will run only when the microphone hear acoustic signals like talking or music. This VOX is an advanced type of circuit that has the ability to distinguish voice from background noise and the power circuit is only switched on when a voice signal is present. Therefore, the switching operation is highly reliable in noisy environments. AGC on / off: is integrated in the transmitter. The AGC action prevents over-modulation at high sound levels and makes it possible to listen to very weak conversation at the same time. Scrambler on / off: The transmitter includes an audio scrambler-circuit, which can be switched on and off by the remote control. The scrambler has been added for greater security, and to avoid listening in by unauthorized persons. It is based on simple frequency-inversion techniques due to the very low power needed for that sort of circuit. In the scramble mode, the audio frequency response, as well as the signal to noise ratio, are somewhat minimized compared to the un-scrambled mode. Changing channels: It is possible to shift between 4 channels by the remote control. The 4 channels (frequencies) are pre-programmed in the #1015QKE Page 6 of 9 transmitter. During operation, it is possible to shift channel in order to use the optimal channel (frequency). Output Power: The transmitter has two power levels, which can be selected by the X-ider remote control. The output power in high mode is 1W for the VHF version. In low power mode both versions will deliver approx. 300mW into 50 ohms. The supply voltage can be varied in the range from 3.3 to 15 V DC. In the low power mode the output power will be constant in the full supply voltage range, whereas in the high power mode the output power will begin to decrease at 4.75V input voltage and will be approx. halved at 3.3V. Because of the build-in switch-mode regulator the current consumption will increase as the input voltage is lowered. 1.2.3 Application Note To achieve maximum RF range it is advisable to keep the antenna as far away from the surroundings as possible. If an antenna is in close proximity to metal surfaces or concrete walls, the efficiency of the transmitter will be minimized due to power absorption and disturbance of the antenna radiation pattern. For maximum battery lifetime and for minimizing the risk of being found by bug detectors or scanners, the transmitter can be switched off into sleep- mode by means of the remote control. Alternatively, simply choose VOX mode, when in doubt whether persons will be present in the room being monitored. The TX will then only go “on the air” every time conversation is detected in the room. After app. 15 sec. without conversation, the TX will go to sleep again and thus sawing battery power. Please note that because the transmitter is a very small high-power device, the housing is becoming hot under normal application conditions (up to 60 degrees centigrade). Therefore don’t wrap the transmitter into isolation materials and always be sure that the transmitter can get rid of its heat #1015QKE Page 7 of 9 1.2.4 Wire connection 1.2.5 Transmitter During off state, the transmitter is completely switched off, and as the remote receiver does not contain a local oscill…

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590665.DOC Spectronic Denmark A/S Skindbjergvej 44 DK-8500 Grenaa, Denmark Telephone +45 86387222 Fax +45 86387704 www.spectronic-denmark.com [email protected] Bank: Nordea Randers DKK acct: DK81 2000 5700 137100 Swift: Unibdkkk VAT/CVR No. 13 44 98 48 To Federal Communications Commission 445 12 th Street SW Washington, DC 20554 Grenaa 14-06-05 Re: Request for Confidentiality FCC ID: QKE-INCA-TXHA To Whom It May Concern: Please be advised that the following information is to be held confidential on behalf of Spectronic Denmark A/S: • Schematics (TXFH-RC_Schematic_1015QKE.pdf) for QKE-INCA-TXHA • Bill of Material (TXFH-RC_BOM_1015QKE.pdf) for QKE-INCA-TXHA • Block Diagram (TXFH-RC_BLOCK_1015QKE.pdf) for QKE-INCA-TXHA • Description (TXHF-RC_ OD_ Rev_ 101_1015QKE.pdf) for QKE-INCA-TXHA The application contains technical information, which Spectronic Denmark A/S deems to be trade secrets and proprietary. If made public, the information might be used to the disadvantage of the applicant in the market place. This request is made under the provisions of section 0.459(d) of the FCC rules and section 0.552(b)(4) of the Freedom of Information Act. Thank you for your attention to this matter. Yours Sincerely SPECTRONIC DENMARK Jimmi M. Hansen Development Manager

Page 1/1 TXFH-RC_External_photos_1015QKE.doc TXFH-RC Transmitter FCC ID: QKE-INCA-TXHA External: Top side External: Bottom side

Page 1/1 TXFH-RC_Internal_photos_1015QKE.doc TXFH-RC Transmitter FCC ID: QKE-INCA-TXHA Internal: Top side Internal: Bottom side

I. INFORMATION REQUIRED UNDER PART 2 Para. 2.10033(a) This Application for Certification is filed on form 731 with all questions answered. 2.10033(b) N/A 2.10033(c)(1) The full name and address of the applicant and manufacturer for certification is: Spectronic-Denmark A/S Skindbjergvej 44 DK 8500 Grenaa Denmark (2) The FCC Identifier of the device is QKE-INCA-TXHA (3) A copy of the operating instructions is included in the EXHIBITS. (4) Emission: NBFM Voice – Designator: 11K2F3E Emissions calculation is included in the EXHIBITS. (5) Frequency Range: 150 –174 MHz (6) Power: Two power levels: 300 mW at 135 mA; 6 VDC and 1.0 W at 360 mA; 6 VDC (7) Maximum Power Rating of 1.1 Watt (8) All stages are powered by 2.75 VDC regulated supplies with the exception of the driver and the final amplifier devices, which are connected to a step-down regulator. The output voltage is 4.65 VDC in high-power mode, and 2.45 VDC in low -power mode (9) A tune-up procedure is included in the EXHIBITS. (10) A schematic diagram is included in the EXHIBITS. (11) A drawing and photo of the equipment identification label is included in the EXHIBITS. (12) Photographs showing the external and internal construction of the equipment are included in the EXHIBITS. (13) N/A (14) Test Data as required by (46)§§(47) 2.1046 through 2.1057, inclusive, is measured in accordance with the procedure setout in (48)§ 2.1041. (15) N/A (16) N/A I.l RF EXPOSURE STATEMENT Data required by § 1.1310 Radiofrequency radiation exposure limits. CALCULATION METHOD OF RF SAFETY DISTANCE: S = PG/4πr 2 = EIRP/4πr 2 => r = √(PG/4πS) = √(EIRP/4πS) Where: P: power input to the antenna in mW EIRP: Equivalent (effective) isotropic radiated power. S: power density mW/cm2 G: numeric gain of antenna relative to isotropic radiator r: distance to centre of radiation in cm P = 1100 mW (max. power measured at 157.450 MHz) G < 2.15 dBi (monopole) = 10 (2.15/10) numeric S 30 = 0.2 mW/cm 2 (refer to § 1.1310 table 1 (B) Limits for General Population/Uncontrolled Exposures – 30 min.) S 6 = 1 mW/cm 2 (refer to § 1.1310 table 1 (A) Limits for Occupational/Controlled Exposures – 6 min) RESULT r 30 = √(PG/ 4πS) = √((1100 * 10 (2.15/10) ) / (4π(0.2)) = 29.6 cm for General Population/Uncontrolled Exposures – 30 min r 6 = √(PG/ 4πS) = √((1100 * 10 (2.15/10) ) / (4π(1)) = 9.4 cm for Occupational/Controlled Exposures – 6 min So, the minimum safety distance for 2.15dBi monopole antenna is approximately 30 cm or 0.3 meters for General Population/Uncontrolled Exposures – 30 min and approximately 10 cm or 0.1 meters for General Population/Uncontrolled Exposures – 6 min II. TEST DATA Data required by (46)§§(47) 2.1046 through 2.1057, inclusive, is measured in accordance with the procedures setout in (48)§ 2.1041. RF POWER OUTPUT 2.1046(a), 2.1033(c)(8) Power output measurements were made at the RF output connector. This test was done with an unmodulated carrier in accordance with §90.205(d). The power output was measured with a Rhode & Schwarz ESPI Test receiver. The electrical characteristics of the RF load was 50 + j0 Ohms (50 ohms pure resistive). The RF power measured mid-band was 1.10W at 6.0V DC. Thus the sample complies with §90.205(d). Power vs Frequency 0 0,2 0,4 0,6 0,8 1 1,2 150155160165170 Frequency (MHz) Power (Watt) MODULATION CHARACTERISTICS 2.1047(a), 90.211(a) Spectrum analyzer data is included which shows that the equipment will meet the modulation requirements under §90.211(a). This transmitter is equipped with an audio low pass filter circuit. Frequency Response Measurement data showing the frequency response of the transmitter is tabulated and graphed below. A reference level of 1.25 kHz deviation (as measured with the Rhode & Schwarz ESPI Test receiver) at the frequency of maximum response (2500 Hz) was used. At each test frequency, the input audio level was adjusted to maintain the reference deviation. Deviation response vs. frequency -25 -20 -15 -10 -5 0 5 100100010000 Frequency (Hz) Relativ Response (dB) Modulation Limiting Curves showing frequency deviation versus the microphone input levels are shown below, tested at the frequency of maximum deviation (2.5 kHz). The information submitted shows the modulation limiting capability throughout the range of input signals employed. A H.P. 33120A Function Generator was used to generate the modulation, and the Rhode & Schwarz ESPI Test receiver was used to measure modulation. A 3.3 k ohms resistor in series with the audio generator was used to simulate the output impedance of the microphone. Audio levels were verified with a HP34401A Multimeter. Modulation Limiting 100 1000 10000 0,1110100 Audio input level (mV RMS) Peak Deviation (Hz) OCCUPIED BANDWIDTH 2.1049, 90.211(a) The next series of plots are taken from the Rhode & Schwarz ESPI Test receiver. The transmitter was modulated by the H.P 33120A Function Generator with a sine wave at 2500 Hz at a level 16 dB above that required to produce 50% modulation (1.25 kHz deviation). A 3.3 k ohms resistor in series with the audio generator was used to simulate the output impedance of the microphone. Audio levels were verified with a HP34401A multimeter. The transmitter output connector was connected to the input of the test receiver via a 1 meter test cable made of RG-316 coaxial cable, terminated with a BNC and a MMCX connector and a BIRD model 8303-100-N10DB, 50-ohm, 10dB attenuator. Power was supplied to the test sample via an Amrel LPS-305 Power Supply and test leads. Paragraph 90.210(d) states that for transmitters that are designed to operate with a 12.5 kHz channel bandwidth, any emission must be attenuated below the power (P) of the highest emission contained within the authorized bandwidth as follows: 1) 0n any frequency removed from the center of the authorized bandwidth f0 to 5.625 kHz removed from f0: Zero dB. 2) 0n any frequency removed from the center of the authorized bandwidth by a displacement frequency (fd in kHz) of more than 5.625 kHz but no more…

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I. INFORMATION REQUIRED UNDER PART 2 Para. 2.10033(a) This Application for Certification is filed on form 731 with all questions answered. 2.10033(b) N/A 2.10033(c)(1) The full name and address of the applicant and manufacturer for certification is: Spectronic-Denmark A/S Skindbjergvej 44 DK 8500 Grenaa Denmark (2) The FCC Identifier of the device is QKE-INCA-TXHA (3) A copy of the operating instructions is included in the EXHIBITS. (4) Emission: NBFM Voice – Designator: 11K2F3E Emissions calculation is included in the EXHIBITS. (5) Frequency Range: 150 –174 MHz (6) Power: Two power levels: 300 mW at 135 mA; 6 VDC and 1.0 W at 360 mA; 6 VDC (7) Maximum Power Rating of 1.1 Watt (8) All stages are powered by 2.75 VDC regulated supplies with the exception of the driver and the final amplifier devices, which are connected to a step-down regulator. The output voltage is 4.65 VDC in high-power mode, and 2.45 VDC in low -power mode (9) A tune-up procedure is included in the EXHIBITS. (10) A schematic diagram is included in the EXHIBITS. (11) A drawing and photo of the equipment identification label is included in the EXHIBITS. (12) Photographs showing the external and internal construction of the equipment are included in the EXHIBITS. (13) N/A (14) Test Data as required by (46)§§(47) 2.1046 through 2.1057, inclusive, is measured in accordance with the procedure setout in (48)§ 2.1041. (15) N/A (16) N/A I.l RF EXPOSURE STATEMENT Data required by § 1.1310 Radiofrequency radiation exposure limits. CALCULATION METHOD OF RF SAFETY DISTANCE: S = PG/4πr 2 = EIRP/4πr 2 => r = √(PG/4πS) = √(EIRP/4πS) Where: P: power input to the antenna in mW EIRP: Equivalent (effective) isotropic radiated power. S: power density mW/cm2 G: numeric gain of antenna relative to isotropic radiator r: distance to centre of radiation in cm P = 1100 mW (max. power measured at 157.450 MHz) G < 2.15 dBi (monopole) = 10 (2.15/10) numeric S 30 = 0.2 mW/cm 2 (refer to § 1.1310 table 1 (B) Limits for General Population/Uncontrolled Exposures – 30 min.) S 6 = 1 mW/cm 2 (refer to § 1.1310 table 1 (A) Limits for Occupational/Controlled Exposures – 6 min) RESULT r 30 = √(PG/ 4πS) = √((1100 * 10 (2.15/10) ) / (4π(0.2)) = 29.6 cm for General Population/Uncontrolled Exposures – 30 min r 6 = √(PG/ 4πS) = √((1100 * 10 (2.15/10) ) / (4π(1)) = 9.4 cm for Occupational/Controlled Exposures – 6 min So, the minimum safety distance for 2.15dBi monopole antenna is approximately 30 cm or 0.3 meters for General Population/Uncontrolled Exposures – 30 min and approximately 10 cm or 0.1 meters for General Population/Uncontrolled Exposures – 6 min II. TEST DATA Data required by (46)§§(47) 2.1046 through 2.1057, inclusive, is measured in accordance with the procedures setout in (48)§ 2.1041. RF POWER OUTPUT 2.1046(a), 2.1033(c)(8) Power output measurements were made at the RF output connector. This test was done with an unmodulated carrier in accordance with §90.205(d). The power output was measured with a Rhode & Schwarz ESPI Test receiver. The electrical characteristics of the RF load was 50 + j0 Ohms (50 ohms pure resistive). The RF power measured mid-band was 1.10W at 6.0V DC. Test results: PASS. Thus the sample complies with §90.205(d). Power vs Frequency 0 0,2 0,4 0,6 0,8 1 1,2 150155160165170 Frequency (MHz) Power (Watt) MODULATION CHARACTERISTICS 2.1047(a), 90.211(a) Spectrum analyzer data is included which shows that the equipment will meet the modulation requirements under §90.211(a). This transmitter is equipped with an audio low pass filter circuit. Test results: PASS. Frequency Response Measurement data showing the frequency response of the transmitter is tabulated and graphed below. A reference level of 1.25 kHz deviation (as measured with the Rhode & Schwarz ESPI Test receiver) at the frequency of maximum response (2500 Hz) was used. At each test frequency, the input audio level was adjusted to maintain the reference deviation. Deviation response vs. frequency -25 -20 -15 -10 -5 0 5 100100010000 Frequency (Hz) Relativ Response (dB) Modulation Limiting Curves showing frequency deviation versus the microphone input levels are shown below, tested at the frequency of maximum deviation (2.5 kHz). The information submitted shows the modulation limiting capability throughout the range of input signals employed. A H.P. 33120A Function Generator was used to generate the modulation, and the Rhode & Schwarz ESPI Test receiver was used to measure modulation. A 3.3 k ohms resistor in series with the audio generator was used to simulate the output impedance of the microphone. Audio levels were verified with a HP34401A Multimeter. Modulation Limiting 100 1000 10000 0,1110100 Audio input level (mV RMS) Peak Deviation (Hz) OCCUPIED BANDWIDTH 2.1049, 90.211(a) The next series of plots are taken from the Rhode & Schwarz ESPI Test receiver. The transmitter was modulated by the H.P 33120A Function Generator with a sine wave at 2500 Hz at a level 16 dB above that required to produce 50% modulation (1.25 kHz deviation). A 3.3 k ohms resistor in series with the audio generator was used to simulate the output impedance of the microphone. Audio levels were verified with a HP34401A multimeter. The transmitter output connector was connected to the input of the test receiver via a 1 meter test cable made of RG-316 coaxial cable, terminated with a BNC and a MMCX connector and a BIRD model 8303-100-N10DB, 50-ohm, 10dB attenuator. Power was supplied to the test sample via an Amrel LPS-305 Power Supply and test leads. Paragraph 90.210(d) states that for transmitters that are designed to operate with a 12.5 kHz channel bandwidth, any emission must be attenuated below the power (P) of the highest emission contained within the authorized bandwidth as follows: 1) 0n any frequency removed from the center of the authorized bandwidth f0 to 5.625 kHz removed from f0: Zero dB. 2) 0n any frequency removed from the center of the authorized bandwidth by a displacement frequency (fd in…

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