DD4UC1B

E1998, Shure Brothers Inc.Printed in U.S.A. 25A1043 (RI) Service Manual UC1 / UC1L Body-Pack UHF Transmitter Characteristics General The Shure UC1/UC1L Body-Pack Transmitter is microprocessor- controlled, operating in the 774 – 862 MHz frequency range. The UC1/ UC1L is used in mid-level installed sound, rental, and concert sound applications. Six frequency range variations are available. Controls and Connectors 1 2 3 1. Antenna 2. Power/Battery Fuel Gauge LEDs 3. Power ON/OFF Switch 4. Input Connector 5. Rf/Audio Mute Switch Input Connector 6. Input Attenuation Control 7. Audio Gain Control 8. Group Rotary Switch 9. Channel Rotary Switch 10. Battery Compartment 11. Battery Cover Release Tabs 12. Battery Compartment Cover Figure 1.UC1 Controls and Connectors 4 5 10 11 12 7 8 9 6 Service Note: Shure recommends that all service procedures be performed by a Factory-Authorized Service Center or that the product be returned directly to Shure Brothers Inc. Shure UC1 Body-Pack UHF Transmitter 225A1043 (RI) Service Procedures Circuit Description CONTROL PLL CONTROL MCU EEPROM (MEM) OFF / MUTE DETECT +5V REG. REMOTE MUTE GROUPCHANNEL SYNTH. RF POWER RF MUTERF MUTE VCO FROM BATT. UNREG. PWR. +5v AUDIO IN PWR. HOLD CIRCUIT MIC. / INSTR. ON / OFF SWITCH FET BYPASS TONE KEY CIRCUIT Σ TONE CONTROL TONE KEY CALL ID BATTERY MGMT. & FUEL GAUGE AUDIO OUT MIC. / INSTR. LIMITER CONTROL OUTPUT LIMITER CONTROL INPUT Figure 2.UC1 Circuit Block Diagram Audio Section Domestic Models The audio signal enters the audio board at J204, pin 1. The signal then enters a switchable 20 dB pad made up of SW203, R203, R204, C204, and C206. The back-to-back diodes, U206, are used to keep the op-amp from snapping to the rail and reverse-phasing when the maximum input voltage range is exceeded. The signal is ac-coupled through C205 into a 40 dB (30 dB for J frequencies) user-adjustable gain stage around amplifier U2. This gain stage is externally accessible to the user. Due to its topology, it is a unique stage because it is non-inverting and allows for a gain less than unity. Resistors R205 and R207 set up a half-supply bias, and R206 sets the ac input impedance. The amplified audio signal then passes through a pre-emphasis network before entering the compression stage. R221, R222, C215, and C216 set up two corners for the pre-emphasis network. The pre- emphasis network feeds the NE575 compander, U203, which utilizes Shure UC1 Body-Pack UHF Transmitter 3 25A1043 (RI) Characteristics an external amplifier, U202B. U203 performs a 2:1 logarithmic compres- sion of the audio signal. Transistors Q201 and Q202, with crystal Y201, form the tone key oscillator circuit that provides a stable, continuous 32.768 kHz sine wave. Q204 buffers the tone key signal before it is added to the audio signal. The tone key signal is used in the receiver to provide audio out- put only when the tone key signal is present in the transmitted signal. If the tone key or the transmitter is turned off, the receiver is muted. Q211 acts as a switch for toggling the tone key ON/OFF. It is con- trolled from the microprocessor, via the TONEMUTE0 signal. The tone key signal, along with the processed audio signal, is then fed to a sum- ming amplifier, U201A. After passing through the ac coupling capacitor, C240, the signal is then fed to the rf module. The battery meter circuit is comprised of comparator U208 and LEDs D201, D202, D203, and various resistors. When the battery circuit is less than 6.5 Vdc, the output of U208, pin 13, changes low, the red LED illuminates, and the tone-key level increases. The receiver then utilizes the amplitude of the tone-key to indicate that the transmitter battery is low. A 9 Vdc battery provides power to the audio printed circuit board (pcb) through switch SW202. FET Q217 provides electrical reverse battery protection. 9 Vdc enters U205, a low-dropout 5 Vdc regulator, and gives a clean regulated 5 Vdc supply to run the audio circuitry. ETSI Models This transmitter uses the same board as the non-ETSI system, except that it requires a different topology and different parts. A limiter is inserted between the pre-emphasis and the compressor to limit the occupied bandwidth. The buffer after the gain stage, U201A, is now an inverter with pre-emphasis and 20 dB of attenuation. Previously bypassed, the expander side of U203 is now activated and used as a limiter. A sample of the audio is taken from the limiter output (U203, pin 6) and sent to a control circuit which detects signals from a limiting threshold. The comparator then sends a control signal to U202, pin 5, which clamps the signal. Rf Section Processed audio enters R149, an internal potentiometer that is adjusted for 45 kHz deviation (100% modulation for UA, MA, and MB frequencies), with a –7.2 dBV (0.355 Vrms) 1 kHz tone at the output of the front audio stage (U201, pin 1). For KK frequencies, R243 is adjusted for 40 kHz deviation. For JB frequencies, R149 is adjusted for 5 kHz deviation with –63.2 dBV, 1 kHz tone at the input to the transmitter. Shure UC1 Body-Pack UHF Transmitter 425A1043 (RI) Characteristics The audio is then fed to the tuning voltage pin of the voltage- controlled oscillator (VCO) and modulates the carrier directly. Using a phase-locked loop (PLL) frequency synthesized system eliminates the need for multiplier stages and results in a much higher degree of spectral purity. The VCO is shielded to prevent external rf fields from affecting its operation. Regulated 5 Vdc power is provided to ensure frequency stability with changes in battery voltage. The VCO can tune from 782 MHz to 810 MHz with a 1 Vdc to 4 Vdc tuning voltage range; different VCOs are required for MB and KK frequen- cy models. At the output of the VCO, the rf signal splits into two paths. The output of the VCO is coupled by C134 to the frequency control pin of the synthesizer, U104, pin 8. The internal circuitry of the synthe- sizer divides the signal, as necessary, to the desired reference fre…

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CONTENTS SPECIFICATIONS2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Furnished Accessories4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Optional Accessories5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replacement Parts5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FREQUENCY SELECTION GUIDE6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Compatibility Groups6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Shure Brothers Incorporated 222 Hartrey Avenue Evanston IL 60202-3696 U.S.A. UHF Wireless System USER GUIDE SUPPLEMENTUB (692–716 MHz) 27A8694 (SE) E1999, Shure Brothers Incorporated Printed in U.S.A. 2 SPECIFICATIONS RF Carrier Frequency Range 692–716 MHz Working Range 152.4 m (500 ft), minimum, under typical conditions; 487.6 m (1600 ft ) line of sight NOTE: Actual working range depends on RF signal absorption, reflection and interference Audio Frequency Response 45 to 15,000 Hz, ±2 dB. NOTE: Overall system frequency response depends on the microphone element Gain Adjustment Range UC1B: –6 to 34 dB UC2B: –6 to 26 dB Modulation ±45kHz deviation compressor-expander system with pre-and de-emphasis RF Power Output UC1B: 50 mW effective radiated power, typical UC2B: 20 mW effective radiated power, typical Dynamic Range >100 dB, A-weighted Receiver Audio Output Level (Maximum) +5 dBu typical, unbalanced output +14 dBu typical, balanced output RF Sensitivity UC4B: –108 dBm at 12 dB SINAD Image Rejection 90 dB typical Spurious Rejection 70 dB typical Ultimate Quieting (ref. 45 kHz deviation) >100 dB, A-weighted Audio Polarity Positive pressure on microphone diaphragm (or positive voltage applied to tip of WA302 phone plug) produces positive voltage on pin 2 with respect to pin 3 of low impedance output and the tip of the high impedance 1 / 4 -inch output System Distortion (ref. ±45 kHz deviation, 1 kHz modulation) 0.4% Total Harmonic Distortion typical Power Requirements UC1B, UC2B: 9V alkaline battery (Duracell MN1604 recommended); Nicad optional UC4B: 15 Vdc , 600 mA 50/60 Hz Power Consumption: 600 mA x 15 V, maximum Transmitter Battery Life (Typical) 8 hours (with Duracell MN1604 9V alkaline battery) Operating Temperature Range -7° to 49° C (20° to 120° F) NOTE: Battery characteristics may limit this range Overall Dimensions UC1B: 99.06 mm L x 63.50 mm W x 22.86 mm D (3–29/32 L x 2–1/2 W x 29/32 in. D) UC2B/58:247.30 mm L x 50.8 mm Dia. (9–1/2 L x 2 in. Dia.) UC2B/BETA 58: 241.30 mm L x 50.80 mm Dia. (9–1/2 L x 2 in. Dia.) UC2B/87:215.90 mm x 50.80 mm Dia. (8–1/2 L x 2 in. Dia.) UC2B/BETA 87: 215.90 mm L x 50.8 mm Dia. (8–1/2 L x 2 in. Dia.) UC4B: 44.50 mm H x 197.40 mm W x 214.30 mm D (1–3/4 L x 7.77 W x 8.44 in. D) 3 Net Weight UC1B: 73.50 g (2.59 oz.) without battery UC2B/58, U2/BETA 58: 311.9 g (11 oz.) without battery UC2B/87, U2/BETA 87: 198.5 g (7 oz.) without battery UC4B: 1.22 kg (2 lbs, 11 oz.) Certification UC1B, UC2B: Type Accepted under FCC Parts 74. Certified by IC in Canada under TRC-78. FCC ID for UC1B: DD4UC1B. FCC ID for UC2B: DD4UC2B. UC4B: UL and cUL Listed to UL 813 and CSA C22.2 No. 1. VDE Certified to EN 60 950. Approved under the Notification provision of FCC Part 15; Certified by IC in Canada under TRC-78. FCC ID: DD4UC4B. UC1B Transmitter Input (Figure 1) Connector: Switchcraft TA4F Tini Q.G. or LEMO connector (optional) Input Configuration: Unbalanced, active Actual Impedance: 18 kΩ with lavalier microphone 1 MΩ with instrument cable Maximum Input Level: 9 Vp–p (10 dBV) for 1% THD at minimum gain setting using 1 kHz signal. TA4F Tini Q.G. Connector Pin Assignments: Pin 1: Tied to Ground Pin 2: Tied to +5 V Pin 3: Tied to Audio Pin 4: Tied thru 20kΩ Resistor to Ground. (On instrument adapter cable, Pin 4 floats) LEMO Connector Pin Assignments: Pin 1: Tied to Pin 3 and 10 kΩ to Ground Pin 2: +5V Pin 3: Tied to Pin 1 Pin 4: Tied to Shield (Ground for Positive Bias) Voltage for Remote Power: +5 V supplied to microphone cartridge 27 pF 20K Ω 27 pF +5 V AUDIO GROUND UC1B MIC JACK BOARD 2 1 4 500 Ω 500 Ω MICROPHONE ELEMENT 3 2 1 3 4 NOTE: LAVALIER MIC TIES PINS 3 AND 4 TOGETHER; GUITAR CABLE DOES NOT. 27 pF 499 Ω 499 Ω 3 27 pF 10K Ω AUDIO SHIELD 1 4 2 BIAS UC1B UC1BL (LEMO 4 PIN) MIC JACK BOARD FIGURE 1 4 UC1B Transmitter Output Antenna: Flexible 1/4 wave wire Actual Impedance: 50 Ω Nominal Output Level: +16 dBm Maximum Output Level: +17 dBm UC2B Transmitter Input Input Configuration:Unbalanced, active Actual Impedance: 25 kΩ Maximum Input Level:9 Vp–p (10 dBV) for 1% THD at minimum gain setting using 1 kHz signal. UC2B Transmitter Output Antenna: Internal dipole Actual Impedance: 50 Ω Nominal Output Level: +12 dBm, radiated Maximum Output Level: +12 dBm, conducted UC4B Receiver Input Connector:AntennaPower Input Connector Type:BNCdc style Actual Impedance:50 Ω–– Nominal Input Level:–95 to –30 dBm15 Vdc Maximum Input Level:+6 dBm (–20 dBm recommended) 17 Vdc Pin Assignments:Shell = Ground Center = Signal Center pin positive UC4B Receiver Output Connector:High Z AudioLow Z Audio Output Configuration: UnbalancedBalanced Actual Impedance: 1 kΩ44Ω Nominal Input Level: –––– Output Level: 5 dBu maximum14 dBu maximum Pin Assignments: Tip = Hot Ring/ Sleeve = Gnd 1 = Ground 2 = Hot 3 = Hot FURNISHED ACCESSORIES Microphone Stand Adapter (UC2B)WA370A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Zipper Bag (UC1B)26A13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Zipper Bag (UC2B)26A14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Screwdriver 80A498. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1/4 Wave AntennaUA400. . . . . . . . . . . . . . . . . . . . . …

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CONTROL PLL CONTROL MCU EEPROM (MEM) OFF / MUTE DETECT +5V REG. REMOTE MUTE GROUPCHANNEL SYNTH. RF POWER RF MUTERF MUTE VCO FROM BATT. UNREG. PWR. +5v AUDIO IN PWR. HOLD CIRCUIT MIC. / INSTR. ON / OFF SWITCH FET BYPASS TONE KEY CIRCUIT Σ TONE CONTROL TONE KEY CALL ID BATTERY MGMT. & FUEL GAUGE AUDIO OUT MIC. / INSTR. LIMITER CONTROL OUTPUT LIMITER CONTROL INPUT Figure 1 Block Diagram of the UC1B Body Pack Transmitter

Description: Body-Pack UHF Transmitter DRWG. UC1-7 94-8379-7, 94-8392-7 Refer To Drawing NOS. 6A250, 94-8379-3, 90-8762-11, 90-8762-3, 34A8577, 900G000, 94-8392-3, 90-8789-11, 90-8789-3 Page 1 of 20 ISS RECORD OF CHANGES MADE 1 Production Release EXP. DWG. NO. 16914 ORIG USED IN SHURE BROTHERS INC. 222 HARTREY AVENUE EVANSTON, IL 60202 PHONE 847-866-2200 Microphones-Electronic Components TYPED J. Astroski, D. Cerra, I. Singh CHECKED APPROVED K. Mikes 8/13/98 APPROVED Shure Model UC1B UHF Body-Pack Transmitter Specification Outline General Product Description I Special Features II Circuit Description III Test Equipment IV Alignment Procedure V Test for Product Acceptance VI Agency Approvals VII Additional Product Specifications VIII Mechanical Specification IX Environmental Specification X Service Evaluation General Product Description The Shure Model UC1 is a UHF,μP (microprocessor) controlled, transmitter operating over the frequency range of 692-716 MHz (With four different models). The transmitter features a minimum of 8hrs battery life using a 9- volt alkaline battery, switchable group/channel, with a battery status indicator, a plastic enclosure, and utilizes an external antenna to provide optimum range. This product is intended for use in installed sound, music instrument, audio/video, audio rental, and touring sound markets. ISpecial Features 1. Frequency agile, microprocessor controlled. Model number determines frequency band of operation as well as size of minimum step of synthesizer (center frequency). User capable of selecting 10 Groups of 16 compatible channels. For example:UC1-UA operates between 692-716 MHz on 125 kHz centers for a total of 160 frequencies. 2. A minimum of 12 compatible systems (country dependent). 3. Tone-key squelch. 4. 9 Volt battery operation with electrical reverse battery protection. 5. Switchcraft “Tini Q-G” type input connector (4 pin, mates with switchcraft TA4F or equivalent). Supports WL83A, WL84A, WL93, WM98, WCM16, WH10TQG, and WA302 mics, headsets, and cables. (A Lemo connector version also available) Description: Body-Pack UHF Transmitter DRWG. UC1-7 94-8379-7, 94-8392-7 Refer To Drawing NOS. 6A250, 94-8379-3, 90-8762-11, 90-8762-3, 34A8577, 900G000, 94-8392-3, 90-8789-11, 90-8789-3 Page 2 of 20 ISS RECORD OF CHANGES MADE 1 Production Release EXP. DWG. NO. 16914 ORIG USED IN SHURE BROTHERS INC. 222 HARTREY AVENUE EVANSTON, IL 60202 PHONE 847-866-2200 Microphones-Electronic Components TYPED J. Astroski, D. Cerra, I. Singh CHECKED APPROVED K. Mikes 8/13/98 APPROVED 6. When using a new alkaline battery (Duracell MN16044 is recommended) the battery life will be a minimum of 8 hours. 7. Rugged, plastic construction. 8. The power On/Off two position miniature toggle switch located on top of unit. 9. The Group/Channel rotary switches, audio gain adjustment and Mic/Instrument switches are located under the battery door. 10. LED’s for low battery condition. 11. The audio gain is adjustable using a screwdriver (Xcelite R3322 “greenie” is recommended) via a rotary potentiometer. 12. A 3.5 mm input connector is provided for external audio muting capability using digital logic. IICircuit Description Audio Section The audio signal enters through the micjack board to the audio board at J204. The signal then enters a switchable 20dB pad made up of SW201, R203,R204, C204 and C206. The back to back diodes, D206, are used to keep the op amp from snapping to the rail and reverse phasing when maximum input voltage is exceeded. The signal is ac coupled through C205 into a 40dB (30dB Japan) user adjustable gain stage around amplifier U204A. This gain stage is externally accessible to the user. This is a unique stage in that it is non-inverting, and allows for a gain less than unity. R205 and R207 set up a half-supply bias and R206 sets the input impedance. The amplified audio signal then passes through a premphasis network before entering the compression stage. R221, R222, and C216 set up two corners for the premphasis network. The premphasis network feeds the NE575 compandor, U203, which utilizes an external amplifier U201D. The compandor performs 2:1 logarithmic compression of the audio signal. Transistor's Q201 and Q202 with crystal Y201 form the tone-key oscillator circuit which provides a stable continuous 32.768 kHz sine wave. Transistor Q204 buffers the tone key signal before it is added to the audio signal. The tone key signal is used in the receiver to provide audio output only when the tone key signal is present in the transmitted signal. Therefore, if the tone key or the transmitter is turned off, the receiver will be muted. Q211 acts as a switch for toggling the tone key ON/OFF. It is controlled from the μProcessor, via the TONEMUTE0 signal. The tone key signal along with the processed audio signal is then fed to a summing amplifier U201A. After passing through the ac coupling capacitor, (C240), the signal is then fed to the RF module. Description: Body-Pack UHF Transmitter DRWG. UC1-7 94-8379-7, 94-8392-7 Refer To Drawing NOS. 6A250, 94-8379-3, 90-8762-11, 90-8762-3, 34A8577, 900G000, 94-8392-3, 90-8789-11, 90-8789-3 Page 3 of 20 ISS RECORD OF CHANGES MADE 1 Production Release EXP. DWG. NO. 16914 ORIG USED IN SHURE BROTHERS INC. 222 HARTREY AVENUE EVANSTON, IL 60202 PHONE 847-866-2200 Microphones-Electronic Components TYPED J. Astroski, D. Cerra, I. Singh CHECKED APPROVED K. Mikes 8/13/98 APPROVED The battery meter circuit is made up of comparator U208, LED’s D201, D202, D203, and various resistors. The meter works by comparing a divided down version of the battery voltage (R255, R256) to two thresholds (set by R274, R275, and R276), and lighting the appropriate LED. When the battery voltage is less than 6.5 V, the output of U208 at pin13 changes low which turns the red LED on. Through Q222 and U201B the voltage applied to the tone key oscillator circuit switches high; thus, when the red LED goes on the tone key level increases. The tone key amplitude …

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CONTENTS SPECIFICATIONS2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Furnished Accessories4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Optional Accessories5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replacement Parts5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FREQUENCY SELECTION GUIDE6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Compatibility Groups6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Shure Brothers Incorporated 222 Hartrey Avenue Evanston IL 60202-3696 U.S.A. UHF Wireless System USER GUIDE SUPPLEMENTUB (692–716 MHz) 27A8694 (SE) E1999, Shure Brothers Incorporated Printed in U.S.A. 2 SPECIFICATIONS RF Carrier Frequency Range 692–716 MHz Working Range 152.4 m (500 ft), minimum, under typical conditions; 487.6 m (1600 ft ) line of sight NOTE: Actual working range depends on RF signal absorption, reflection and interference Audio Frequency Response 45 to 15,000 Hz, ±2 dB. NOTE: Overall system frequency response depends on the microphone element Gain Adjustment Range UC1B: –6 to 34 dB UC2B: –6 to 26 dB Modulation ±45kHz deviation compressor-expander system with pre-and de-emphasis RF Power Output UC1B: 50 mW effective radiated power, typical UC2B: 20 mW effective radiated power, typical Dynamic Range >100 dB, A-weighted Receiver Audio Output Level (Maximum) +5 dBu typical, unbalanced output +14 dBu typical, balanced output RF Sensitivity UC4B: –108 dBm at 12 dB SINAD Image Rejection 90 dB typical Spurious Rejection 70 dB typical Ultimate Quieting (ref. 45 kHz deviation) >100 dB, A-weighted Audio Polarity Positive pressure on microphone diaphragm (or positive voltage applied to tip of WA302 phone plug) produces positive voltage on pin 2 with respect to pin 3 of low impedance output and the tip of the high impedance 1 / 4 -inch output System Distortion (ref. ±45 kHz deviation, 1 kHz modulation) 0.4% Total Harmonic Distortion typical Power Requirements UC1B, UC2B: 9V alkaline battery (Duracell MN1604 recommended); Nicad optional UC4B: 15 Vdc , 600 mA 50/60 Hz Power Consumption: 600 mA x 15 V, maximum Transmitter Battery Life (Typical) 8 hours (with Duracell MN1604 9V alkaline battery) Operating Temperature Range -7° to 49° C (20° to 120° F) NOTE: Battery characteristics may limit this range Overall Dimensions UC1B: 99.06 mm L x 63.50 mm W x 22.86 mm D (3–29/32 L x 2–1/2 W x 29/32 in. D) UC2B/58:247.30 mm L x 50.8 mm Dia. (9–1/2 L x 2 in. Dia.) UC2B/BETA 58: 241.30 mm L x 50.80 mm Dia. (9–1/2 L x 2 in. Dia.) UC2B/87:215.90 mm x 50.80 mm Dia. (8–1/2 L x 2 in. Dia.) UC2B/BETA 87: 215.90 mm L x 50.8 mm Dia. (8–1/2 L x 2 in. Dia.) UC4B: 44.50 mm H x 197.40 mm W x 214.30 mm D (1–3/4 L x 7.77 W x 8.44 in. D) 3 Net Weight UC1B: 73.50 g (2.59 oz.) without battery UC2B/58, U2/BETA 58: 311.9 g (11 oz.) without battery UC2B/87, U2/BETA 87: 198.5 g (7 oz.) without battery UC4B: 1.22 kg (2 lbs, 11 oz.) Certification UC1B, UC2B: Type Accepted under FCC Parts 74. Certified by IC in Canada under TRC-78. FCC ID for UC1B: DD4UC1B. FCC ID for UC2B: DD4UC2B. UC4B: UL and cUL Listed to UL 813 and CSA C22.2 No. 1. VDE Certified to EN 60 950. Approved under the Notification provision of FCC Part 15; Certified by IC in Canada under TRC-78. FCC ID: DD4UC4B. UC1B Transmitter Input (Figure 1) Connector: Switchcraft TA4F Tini Q.G. or LEMO connector (optional) Input Configuration: Unbalanced, active Actual Impedance: 18 kΩ with lavalier microphone 1 MΩ with instrument cable Maximum Input Level: 9 Vp–p (10 dBV) for 1% THD at minimum gain setting using 1 kHz signal. TA4F Tini Q.G. Connector Pin Assignments: Pin 1: Tied to Ground Pin 2: Tied to +5 V Pin 3: Tied to Audio Pin 4: Tied thru 20kΩ Resistor to Ground. (On instrument adapter cable, Pin 4 floats) LEMO Connector Pin Assignments: Pin 1: Tied to Pin 3 and 10 kΩ to Ground Pin 2: +5V Pin 3: Tied to Pin 1 Pin 4: Tied to Shield (Ground for Positive Bias) Voltage for Remote Power: +5 V supplied to microphone cartridge 27 pF 20K Ω 27 pF +5 V AUDIO GROUND UC1B MIC JACK BOARD 2 1 4 500 Ω 500 Ω MICROPHONE ELEMENT 3 2 1 3 4 NOTE: LAVALIER MIC TIES PINS 3 AND 4 TOGETHER; GUITAR CABLE DOES NOT. 27 pF 499 Ω 499 Ω 3 27 pF 10K Ω AUDIO SHIELD 1 4 2 BIAS UC1B UC1BL (LEMO 4 PIN) MIC JACK BOARD FIGURE 1 4 UC1B Transmitter Output Antenna: Flexible 1/4 wave wire Actual Impedance: 50 Ω Nominal Output Level: +16 dBm Maximum Output Level: +17 dBm UC2B Transmitter Input Input Configuration:Unbalanced, active Actual Impedance: 25 kΩ Maximum Input Level:9 Vp–p (10 dBV) for 1% THD at minimum gain setting using 1 kHz signal. UC2B Transmitter Output Antenna: Internal dipole Actual Impedance: 50 Ω Nominal Output Level: +12 dBm, radiated Maximum Output Level: +12 dBm, conducted UC4B Receiver Input Connector:AntennaPower Input Connector Type:BNCdc style Actual Impedance:50 Ω–– Nominal Input Level:–95 to –30 dBm15 Vdc Maximum Input Level:+6 dBm (–20 dBm recommended) 17 Vdc Pin Assignments:Shell = Ground Center = Signal Center pin positive UC4B Receiver Output Connector:High Z AudioLow Z Audio Output Configuration: UnbalancedBalanced Actual Impedance: 1 kΩ44Ω Nominal Input Level: –––– Output Level: 5 dBu maximum14 dBu maximum Pin Assignments: Tip = Hot Ring/ Sleeve = Gnd 1 = Ground 2 = Hot 3 = Hot FURNISHED ACCESSORIES Microphone Stand Adapter (UC2B)WA370A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Zipper Bag (UC1B)26A13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Zipper Bag (UC2B)26A14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Screwdriver 80A498. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1/4 Wave AntennaUA400. . . . . . . . . . . . . . . . . . . . . …

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EMC Test ServicesReport No7350 1250 Peterson Drive, Wheeling, Illinois 60090, USA07/23/99 Page 1 TEST SPECIFICATION: FCC "Rules and Regulations", Part 74, Experimental Radio, Auxiliary, Special Broadcast and Other Program Distribution Services for Operation in the 614 to 806 MHz Band Subpart H, Low Power Auxiliary Stations Sections 74.801 to 74.882 THE FOLLOWING MEETS THE ABOVE TEST SPECIFICATION Formal Name:UC Wireless Series Transmitters Kind of Equipment:Wireless Microphone (Body Pack) Test Configuration:Transmitting (modulated carrier) Emission Designator: 120KF3B Transmitter FCC ID: DD4UC1B Model Number: UC1B Serial Number: NA Dates of Test:April 28, 29 & May 4, 1999 Test Conducted for:Shure Brothers, Inc. 222 Hartrey Avenue Evanston, Illinois 60202 NOTICE:Please see change information listed inside of this report. This report must not be used by the customer to claim product endorsement by NVLAP or any agency of the United States Government, and it cannot be reproduced (except in full), without the approval of D.L.S. Electronic Systems Inc. EMC Test ServicesReport No7350 1250 Peterson Drive, Wheeling, Illinois 60090, USA07/23/99 Page 2 SIGNATURE PAGE Report Written By: Arnom C. Rowe Test Engineer EMC-001375-NE Report Reviewed by: Jack Prawica Lab Manager Report Approved by: Brian J. Mattson General Manager Company Official: Shure Brothers, Inc. Page 4 EMC Test ServicesReport No. 7350 1250 Peterson Drive, Wheeling, Illinois 60090, USA07/23/99 Page 5 1.Cover Pagei 2.Signature Pageii 3.NBS Certificate of Accreditationiii 5.Table of Contentsiv 7.Summary of Test Report1.0 7.Introduction2.0 7.Object3.0 7.Test Set-up4.0 8.Test Equipment (Bandwidths and Detector Function)5.0 8.RF Power Output6.0 9.Graphs taken of the RF Power Output Measurements6.0 12.Modulation Characteristics7.0 13.Graphs taken of the Modulation Characteristics7.0 14.Occupied Bandwidth8.0 15.Graphs taken of the Occupied Bandwidth8.0 25.Frequency Deviation9.0 26.Graphs taken of the Frequency Deviation9.0 27.Spurious Emission Measurements at Antenna Terminals10.0 28.Conducted Emission Data taken10.0 29.Conducted Emission Graphs Taken10.0 EMC Test ServicesReport No. 7350 1250 Peterson Drive, Wheeling, Illinois 60090, USA07/23/99 Page 6 30.Field Strength of Spurious Emission Measurements11.0 32.Radiated Data taken for Field Strength Measurements11.0 37.Radiated Graphs taken for Field Strength Measurements11.0 44.Frequency Stability (Temperature)12.0 45.Graphs taken of Frequency Stability (Temperature)12.0 51.Frequency Stability (Voltage Variation)13.0 52.Photo Information and Test Set-Up14.0 53.Photos Taken During Testing15.0 55.Change Information16.0 57.Results of Tests17.0 57.Conclusion18.0 58.Equipment ListTABLE 1 EMC Test ServicesReport No. 7350 1250 Peterson Drive, Wheeling, Illinois 60090, USA07/23/99 Page 7 1.0SUMMARY OF TEST REPORT It was found that the UC Wireless Series Transmitters S/N NA meets the radio interference emission requirements of the FCC "Rules and Regulations", Part 74, Subpart H, Sections 74.801 to 74.882 for Low Power Auxiliary Stations operating in the 692 to 716 MHz Frequency Band. 2.0INTRODUCTION On April 28, 29 & May 4, 1999, a series of radio frequency interference measurements were performed on Wireless Microphone (Body Pack), S/N NA. The tests were performed according to the procedures of FCC as stated in Part 2 Subpart J, Equipment Authorization Procedures of the Code of Federal Regulations 47, by personnel of D.L.S. Electronic Systems, Inc. who are responsible to Donald L. Sweeney, Senior EMC Engineer. 3.0OBJECT The purpose of this series of tests was to determine if the test sample could meet the radio frequency emission requirements of the FCC "Rules and Regulations", Part 74, Subpart H, Sections 74.801 to 74.882 for Low Power Auxiliary Stations operating in the 692 to 716 MHz Frequency Band. 4.0TEST SET-UP All radiated emission tests were performed at D.L.S. Electronic Systems, Inc. The radiated tests were made with the test item placed on a wooden turntable located in the Test Room with the receive antenna placed at one or three meters from the device under test. EMC Test ServicesReport No. 7350 1250 Peterson Drive, Wheeling, Illinois 60090, USA07/23/99 Page 8 5.0TEST EQUIPMENT (Bandwidths and Detector Function) All data was automatically plotted using peak detector function. This information was then used to determine the frequencies of maximum emissions. Manual measurements were performed on these frequencies using a peak detector function of the Analyzer with the bandwidths specified by the FCC. From 200 MHz to 1000 MHz a bandwidth of 100 kHz was used (except for Occupied Bandwidth), and above 1000 MHz, wide enough bandwidths were used, depending upon the test being made, to ensure proper measurement of the narrowband signal. A list of the equipment used can be found in Table 1. All equipment was calibrated per the instruction manuals supplied by the manufacturer. 6.0RF POWER OUTPUT - PART 2.1046 As stated in PART 74.861 (e-1), the output power should not exceed 250 milliwatts (24 dBm). The UC Wireless Series Transmitter was tuned according to the tune-up procedures specified in Part 2.1033 (c-8), and adjusted for its maximum output power. The RF output power was measured in the open field, using the following test method: The radiated signal from the EUT was measured at one or three meters using the effective power formula to determine the output power from the EUT. Actual Measurements Taken: 84.00 dBuV Measured output of the transmitter +30.67 dBuV Total system losses (…

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