BZB41XTWIRELESS MICROPHONE

41XT User Manual Thank you for purchasing the Azden 4 1 XT UHF plug-in transmitter. Follow the instructions below for proper operation with any Azden UHF receiver. 4 1 XT plug-in XLR transmitter with 63 on-board user selectable UHF frequencies. Ideal for use with dynamic microphones with XLR output. (1) Open the battery compartment lid by sliding it down and raising it. (2) Insert one 9-volt battery into the compartment. Make sure battery polarity is correct. (3) Frequency select. The group knob allows you to select any of seven frequency groups (numbered from 0-6). The channel knob allows you to select any of nine frequency channels (numbered 0-8) within the selected group. (4) Power and mute switches. The power "on" and "off' switch enable and disable all transmitter functions while the mute switch "on" and "off' turn just the transmitter's carrier signal on and off. Turning the mute switch to off will cause the receiver to mute due to the tone squelch circuitry in the receiver. This allows the microphone to be handled with no noise. (5) Audio input LEVEL control enables you to adjust the input level of the microphone . Turn clockwise to increase, or counterclockwise to decrease the input level. a small screwdriver is supplied to make adjustments. (6) LED INDICATOR'S. The POWER LED turns green when power is turned "on" or red if battery level is low. If this LED lights up red replace the battery. AF PEAK LED lights up if input level is set to high, indicating the onset of distortion. Lower the input level so that the AF PEAK LED lights only occasionally.

 TELEPHONE: (352) 472-5500 (888) 472-2424 FAX: (352) 472-2030 E-MAIL: [email protected] Engineering, Inc.WEBSITE: www.timcoengr.com TIMCO ENGINEERING, INC.
849 N. W. STATE ROAD 45
P.O. BOX 370
NEWBERRY, FL 32669 6/17/99 Mr. George Tanahill FCC SUBJECT: FCCID: BZB41XT REFERENCE: 731 CONFIRMATION NUMBER : EA93845 George, The necessary bandwidth is; Bn = 2M + 2DK = 2(15K) + 2(70K(1) = 170.0K So the necessary bandwidth is 170KF3E. If you need anything else please let me know. Best Regards, Sid Sanders F:\CUS\A\AZDEN\gt906171tr.doc

6/16/99 Mr. George Tanahill FCC SUBJECT: FCCID: BZB41XT REFERENCE: 731 CONFIRMATION NUMBER : EA93845 George, With reference to your letter of 6/10/99 here are the answers; 1. The 731 form has been correct to show 0.3mW. 2. Attached you will find occupied bandwidth plots with 15,000Hz input. 3. Discrete sinewave was fed into the UUT. 4. A schematic is attached. If you need anything else please let me know. Best Regards, Sid Sanders F:\CUS\A\AZDEN\gt90616ltr.doc

TABLE OF CONTENTS LIST APPLICANT: AZDEN CORPORATION FCC ID: BZB41XT TEST REPORT: PAGE 1......COVER SHEET - GENERAL INFORMATION & TECHNICAL DESCR. PAGE 2......TECHNICAL DESCRIPTION CNTD. & RF POWER OUTPUT PAGE 3......RF POWER OUTPUT CONTD. & MODULATION CHARACTERISTICS PAGE 4......OCCUPIED BANDWIDTH PAGE 5......FIELD STRENGTH OF SPURIOUS EMISSIONS PAGE 6......METHOD OF MEASURING RADIATED SPURIOUS EMISSIONS PAGE 7......FREQUENCY STABILITY PAGE 8................CERTIFICATION OF TECHNICAL DATA AND LIST OF TEST EQUIPMENT EXHIBITS CONTAINING: EXHIBIT 1.........POWER OF ATTORNEY LETTER EXHIBIT 2.........FCC ID LABEL SAMPLE AND SKETCH OF LOCATION EXHIBIT 3A........EXTERNAL FRONT VIEW PHOTOGRAPH EXHIBIT 3B........EXTERNAL REAR VIEW PHOTOGRAPH EXHIBIT 3C-3D.....INTERNAL COMPONENT SIDE PHOTOGORAPHS EXHIBIT 3E-3F.....INTERNAL SOLDER SIDE PHOTOGRAPHS EXHIBIT 4.........BLOCK DIAGRAM EXHIBIT 5A-5B.....PARTS LIST & LIST OF ACTIVE DEVICES EXHIBIT 6A-6B.....SCHEMATIC EXHIBIT 7.........USER'S MANUAL EXHIBIT 8A-8C.....CRYSTAL SPECIFICATION EXHIBIT 9A-9C.....TUNING PROCEDURE EXHIBIT 10........AUDIO FREQUENCY RESPONSE GRAPH EXHIBIT 11........AUDIO INPUT VS DEVIATION GRAPH EXHIBIT 12........OCCUPIED BANDWIDTH PLOT - NO MODULATION EXHIBIT 13........OCCUPIED BANDWIDTH PLOT - 10 kHz TONE EXHIBIT 14........OCCUPIED BANDWIDTH PLOT - 2400 Hz TONE APPLICANT: AZDEN CORPORATION FCC ID: BZB41XT REPORT #: F:\CUS\A\AZDEN\AZD101A9.RPT PAGE: TABLE OF CONTENTS GENERAL_INFORMATION_REQUIRED FOR_TYPE_ACCEPTANCE 2.983 (a,b,c) AZDEN CORPORATION will manufacture the BZB41XT in quantity, for use under FCC RULES PART 74.801, LOW POWER AUXILIARY STATIONS. 2.983 (d) TECHNICAL_DESCRIPTION (1) Type of Emission: 160KF3E Bn=2M+2DK M = 1000 D = 72.0KHz (Peak Deviation) K=1 Bn = 2(1K) + 2(72.0K)(1) = 2K +144.0K = 146.0KHz M = 10,000 D = 70KHz K=1 Bn = 2(10K) + 2(70K) = 20 +140 = 160KHz 74.861(e)(5) ALLOWED AUTHORIZED BANDWIDTH = 200KHz. (2) Frequency Range: Part 74: 793.0-806.0 MHz & TEST FREQ = 805.75MHz. (3) Power Range and Controls:UNIT has no power controls. (4) Maximum Output Power Rating: 4.0 MilliWatts ERP. (5) DC Voltages and Current into Final Amplifier: FINAL AMPLIFIER ONLY 9.0V BATTERY Vce = 8.9 Volts Ice = 1.6mA. (6) Function of each electron tube or semiconductor device or other active circuit device: SEE EXHIBIT 5A-5B 2.983(d) (7) Complete Circuit Diagrams: The circuit diagram is included as EXHIBIT 6. The block diagram is included as EXHIBIT 4. The part list is included EXHIBIT 5. APPLICANT: AZDEN CORPORATION FCC ID: BZB41XT REPORT #: F:\CUS\A\AZDEN\AZD101A9.RPT PAGE: 1 2.983(d) (8) Instruction book. The instruction manual is in- cluded as last item in this report. (9) Tune-up procedure. The tune-up procedure is given in page 9A-9B. (10) Description of all circuitry and devices provided for determining and stabilizing frequency. The transmitter frequency is controlled by a crystal, the crystal specifications are included in PAGE 8A-8C. (11) Description of any circuits or devices employed for suppression of spurious radiation, for limit- ing modulation, and for limiting power. There are no devices or circuitry to limit the power, since this is a low power device. The interstage cou- pling between TR1, TR2, TR3, TR4, and TR6 as well as the low pass filter made up of L2, VC1, C26, L3, VC2, C28, L4, L6, VC3, & C29 suppress the harmonics. Limiting Modulation: The transmitter audio circuitry is contained in IC2. The modulation limiting is also provided by IC1B. Limiting Power: There is no provision for limiting power. (12) Digital modulation. This unit does not use digital modulation. 2.983(e) The data required by 2.985 through 2.997 is sub- mitted below. 2.985(a) RF_power_output. ERP was measured by the method described later in this report. The input power to the final stage was measured with a 9.0V supply connected in place of the 9.0V battery. INPUT POWER: FOR 9.0 V OPERATION (8.9V)(0.0016A) = 14.3milliWatts OUTPUT POWER: FOR 9.0 V OPERATION 4.0 mWATTS ERP APPLICANT: AZDEN CORPORATION FCC ID: BZB41XT REPORT #: F:\CUS\A\AZDEN\AZD101A9.RPT PAGE: 2 R.F. POWER OUTPUT /-------\ /-----------------\ | | | | TRANSMITTER | | | |HP | UNDER TEST WITH | \--| |SPECTRUM | INTERNAL ANTENNA| | | |ANALYZER \-----------------/ | | | | | \-------/ |?- 3.0 meters---?| /-------------\ | SIGNAL | DIPOLE | Tuned, Calibrated | GENERATOR | ANTENNA | Antenna which may | |----------/ be raised from 1 \-------------/ to 4 meters above ground and changed in polarization Equipment placed 1 meter above ground on a rotatable platform. The center of the Dipole antenna at the center of the platform and the output of the signal generator adjusted to produce the same meter reading as measured for the fundamental in the radiated emissions test. 2.987(a)(b) Modulation_characteristics: AUDIO_FREQUENCY_RESPONSE The audio frequency response was measured in accordance with TIA/EIA Specification 603 S2.2.6.2.1. with the following exceptions; Constant Deviation Test /---------------\ /----------\ /----------\ | Dummy | | Audio | | RMS | /-| Microphone |--| Generator| /-| VOLTMETER| | | | \----------/ | \----------/ | \---------------/ | |----------------------------------/ | /------------\ /------------\ /---------\ | | | | | | | | Test | | | Transmitter|---/ \----| NEAR FIELD|---| Receiver| \-| under test | | PROBE | | | \------------/ \------------/ \---------/ 1.The test receiver audio bandwidth was <50Hz to >20,000Hz. 2. Apply a 1000Hz tone and adjust the audio generator to produce 10% of the rated system deviation. 3. Measure frequency responce over the frequency range from 100Hz to 20,000Hz. The audio frequency response curve is shown on the next page. AUDIO_LOW_PASS_FILTER The audio low pass filter is not required in this unit. FCC ID: BZB41XT REPORT #: F:\CUS\A\AZDEN\AZD101A9.RPT PAGE: 3 2.989(c) Occupied_bandwidth: Using TIA/EIA 2.2.10 aAccoustic Microphone Sensitivity test procedure to determine if the UUT could be put into modulation limiting and limiting could…

Text truncated - open the document above for the full version.