UCR211 Diversity UHF Receiver Operating Instructions
Contents
1. l 4 ei Press Menu 2 SCAN AND VIEW WINDOW ELEMENTS Switch Settings shows the transmitter switch settings will change rapidly while the unit is scanning Cursor shows relative position of the scanner within the 25Mhz band of the receiver Scan level indications B8 showing relative level of N RF activity across the Remaining unscanned part of band 25MHz bandwidth of the receiver To use the integrated scanning function press both UP DOWN buttons and the MENU button at the same time The display will switch to tte SCAN WINDOW and start scanning immediately Data gathered during a scan is stored until it is purposely erased or the power is turned off Previous data will remain and subsequent scans can be made to search for additional signals or to accumu late higher peaks To stop scanning press the MENU button once The scanning will stop immediately and the display will switch to the VIEW window In this window each vertical band of the display represents eight frequencies 800 kHz Pressing the UP or DOWN buttons will scroll the cursor coarsely across the tuning range The transmitter switch settings matching the frequency indicated by the cursor are shown in the upper right corner of the screen Spectrum data is collected only when the receiver is scanning Successive scanning with repeated passes through the tuning range will accumulate the highest peaks encountered to2. 537 600 563 100 Block 22 563 200 588 700 Block 23 588 800 607 900 and 614 100 614 300 Block 24 614 400 639 900 Block 25 640 000 665 500 Block 26 665 600 691 100 Block 27 691 200 716 700 Block 28 716 800 742 300 Block 29 742 400 767 900 25 5 MHz in 100 kHz steps Triple conversion superheterodyne 244 MHz 10 7 MHz and 300 kHz 0 001 5 5MHz 3dB 0 9 uV 108 dBm A weighted 1 12 uV 105 dBm A weighted Greater than 125 dB Greater than 60 dB 2 uV to 1 Volt Undetectable after processing 85 kHz 85 dB 8 dBm Phased antenna diversity Digital Pulse Counting Detector operating at 300 kHz Dual BNC female 50 Ohm impedance Adjustable from 50 dBu to 9 dBu in 1 dB steps Calibrated into a typical 10K Ohm balanced load Actual output impedance max 500 Ohms min 200 Ohms Pilot tone antenna phase receiver battery level transmitter battery level audio level RF level Frequency TV channel Transmitter switch setting 50 dBu to 9 dBu Both transmitter and receiver in 1 10th volt steps accuracy 10 Coarse and fine modes for spectrum check 1 kHz 50 dBu to 10 dBu output lt 5 THD 9V alkaline 9V lithium AA alkaline AA lithium XLR audio output jack External DC input Battery compartment access Minimum 10 Volts to maximum 18 Volts DC 1 6 W 130 mA at 12VDC 9V alkaline or lithium 110 mA 9V 160mA 6V 6 to 8 hours continuous up to 12 hours intermittent Up to
3. 10 1 i uv Move marker to area with no RF activity 9 Press all three buttons SEL Up and Down and MENU to move to the next screen Two options will be shown Press the SEL Down arrow button to select the USE NEW option and set the receiver to the new frequency just found in scanning UHF Compact Receiver Press the SEL Up arrow button to select USE OLD and return to the frequency that was set before scanning Pilot 40 20 0dB a USE OLD Use the SEL Up and Down arrow buttons to select the old or new freguency LOCKING AND UNLOCKING THE UCR211 FRONT PANEL CONTROLS The front panel panel controls can be LOCKED to prevent accidental changes being made during operation and handling To LOCK Press and hold the MENU button until a bar tracks horizontally across the LCD screen and the word LOCKED appears If the MENU button is released before the word LOCKED appears the unit will remain UNLOCKED When in a LOCKED state the pilot tone bypass toggle is also defeated In LOCKED state the use of the MENU and SELECT Up Down buttons are limited to view only and attempts to change selections will result in a screen displaying the word LOCKED The unit cannot be used for RF scan ning when it is set in the LOCKED state To UNLOCK Press and hold the MENU button until a bar tracks horizontally across the screen and the word UNLOCKED appears When the unit is UNLOCKED all settings
4. 20 hours continuous and intermittent usage are the same 14 oz with batteries 3 23 wide x 1 25 high x 4 64 deep 108 dB A weighted at full quieting Less than 0 5 at 50 modulation 1 kHz 3 dB from 40 Hz to 18 kHz Specifications subject to change without notice Rio Rancho NM USA 17 UCR211 SERVICE AND REPAIR If your system malfunctions you should attempt to correct or isolate the trouble before concluding that the eguipment needs repair Make sure you have followed the setup procedure and operating instructions Check out the intercon necting cords and then go through the TROUBLESHOOTING section in the manual We strongly recommend that you do not try to repair the equipment yourself and do not have the local repair shop attempt anything other than the simplest repair If the repair is more complicated than a broken wire or loose con nection send the unit to the factory for repair and service Don t attempt to adjust any controls inside the units Once set at the factory the various controls and trimmers do not drift with age or vibration and never require read justment There are no adjustments inside that will make a malfunctioning unit start working LECTROSONICS service department is equipped and staffed to quickly repair your equipment In warranty repairs are made at no charge in accordance with the terms of the warranty Out of warranty repairs are charged at a modest flat rate plus parts and shipping Since i
5. PUNITIVE CONSEQUENTIAL OR INCIDENTAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THIS EQUIPMENT EVEN IF LECTROSONICS INC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES IN NO EVENT SHALL THE LIABILITY OF LECTROSONICS INC EXCEED THE PURCHASE PRICE OF ANY DEFECTIVE EQUIPMENT This warranty gives you specific legal rights You may have additional legal rights which vary from state to state LECTROSONICS INC 581 LASER ROAD RIO RANCHO NM 87124 USA www lectrosonics com August 31 2004
6. The RF performance is extremely stable over a very wide temperature range making the UCR211 perfectly suited to the rough environmental conditions found in the field The proprietary audio processing includes a dual band compandor for very low distortion and a superior signal to noise ratio The Smart Squelch system is operated by a pilot tone and mutes the audio output directly at the output connector The UCR211 features a menu driven LCD graphic display and a three button control panel as a convenient means of viewing and altering user settings The Main Window for example shows the pilot tone indicator antenna diversity phase RF level audio level receiver battery status and transmitter battery status It is also possible to bypass the pilot tone from the Main Window Other display windows show operating frequency audio output level battery status in tenths of volts test tone status and provide for selection of levels or functions using the select buttons The frequency scan mode provides a graphical means of observing all signals on the air within the frequency range of the receiver in order to find operating frequencies that are free of interference DIVERSITY RECEPTION The UCR211 antenna phase diversity technology with SMART Diversity minimizes dropouts in situations where multi path reflections can cause serious problems The phase diversity network and PIN diode RF switches are controlled by the microprocessor using
7. a sophisti cated algorithm This design keeps the receiver compact enough for camera mounting or shoulder bag applica tions RF FREQUENCY TRACKING FRONT END AND MIXER The receiver is frequency agile and can be set to operate on any one of 256 frequencies within the tuning range To significantly reduce unwanted interference and intermodulation problems the UCR211 has a frequency selective front end section that tracks and tunes to the desired signal frequency and rejects or tunes out unwanted interfering signals The design consists of four varactor tuned ceramic transmission line resonators controlled by the microprocessor to provide good selec tivitv The low noise high current RF amplifier was designed with feedback regulation for stability and precise gain in order to handle stronger RF signals without output overload The first mixer is of new GaAs technology that has a very high third order intercept point This produces a robust front end that is as selec tive as fixed single frequency designs and is suitable for use in close proximity to other receivers and transmitters commonly used in field production bag systems MICROCONTROLLER PLL AND VCO CIRCUITS The 8 bit microprocessor is truly the heart of the UCR211 receiver It monitors user command inputs from the front panel control buttons and numerous other internal signals such as RF level audio levels pilot tone levels and external internal power voltage
8. activates Adjust the transmitter gain THIS IS PERHAPS THE MOST IMPORTANT STEP IN THE SET UP PROCEDURE Refer to your transmitter manual s Operating Instructions section for details on how to adjust the transmitter gain In general adjust the transmitter gain so that the voice peaks will cause the audio modulation indicators on the receiver and transmitter to show full modulation on the loudest peak audio levels Normal levels should cause the UCR211 s audio level icon to fluctuate fully This will result in the best possible signal to noise ratio for the system Note A common mistake at this point is to use the transmitter audio gain control to set the overall audio level of the entire audio system The transmitter gain control is not a volume control and must be set independently of the overall system audio level The transmitter gain control is only used to set the proper modulation of the transmitter To explain it another way it is used to match the transmitter to the type of microphone and the sound levels that will be present at that microphone We encourage users to either disconnect the rest of the sound system or turn the sound system gain to minimum to prevent feedback or overload as the transmitter gain is set That way feedback from the sound system or overload of other equipment does not get in the way of setting the transmitter gain properly Only after the transmitter gain control is set should the gain of the rest of th
9. aid in finding clear frequencies To clear the scan memory without leaving scan mode turn the power switch off and back on quickly Pressing the MENU button once will shift the display to the FINE VIEW window which will show an expanded portion of the spectrum around the cursor In the FINE VIEW window each vertical band represents one frequency the receiver is capable of tuning The upper right corner shows the transmitter switch settings for the In this screen a vertical center bar is the cursor Underneath the switch settings are two arrows to remind 10 FINE VIEW WINDOW ELEMENTS Transmitter Switch center N no B8 Cursor SCROLL reminders RF Level indicators you that this is a partial picture of the spectrum and that you can scroll left or right to view the entire spectrum of the receiver by pressing the UP and DOWN buttons Pressing the UP button will make the display scroll left showing higher frequencies Pressing the DOWN button will make the display scroll right showing lower frequen cies The cursor remains in place while the display scrolls left or right In addition to assessing the congestion within the RF tuning range of the receiver the scanning mode is also used to find a clear operating frequency Scroll through the screen and find a frequency where no RF signals are present or in the worst case only very weak RF sig nals With the cursor on this frequency press the UP DOWN and ME
10. be engaged somewhere in the middle of the power up sequence following a brief delay to allow the audio circuits to stabilize See LOCKING AND UNLOCKING THE UCR211 FRONT PANEL CONTROLS POWER OFF When the power switch is moved to the OFF position the audio output is instantly muted squelched and the message POWERING OFF is displayed briefly before switching off 6 LECTROSONICS INC UHF Compact Receiver FRONT PANEL CONTROLS AND INDICATORS SELECT Up Button control up one MENU Button Pilot 40 26 008 y Div RF Aud Rx Tx LECTRO ucr211 MENU C OFF SELECT Down OFF ON Power Button control switch down one step LCD SCREEN SELECT UP DOWN BUTTONS The LCD Screen is a graphics type Liquid Crystal The SELECT Up Down buttons are used to select Display that is used to monitor system operation and various options within each display selection and for configure the UCR201 setting the operating frequency of the receiver MENU BUTTON POWER ON OFF SWITCH The MENU button steps through the four primary The Power ON OFF switch is used to applied battery or windows and setup screens external power to the unit REAR PANEL FEATURES BATTERY DOOR AUDIO OUT Jack To open lift 10 18VDC this edge and turn door 4 ers Power Input Jack XLR AUDIO OUTPUT JACK This is a standard XLR configuration with pin 2 positive strip side to the side
11. of the receiver or mount with the with reference to hand held and plug on transmitters opening end of the strip up place the cable in the strip With lavalier microphones and belt pack transmitters and secure however phase will vary with different types of micro phones 2 wire vs 3 wire for example The audio output is balanced but not floating so an unbalanced signal is available using pin 1 as ground and pin 2 as signal leaving pin 3 open POWER INPUT JACK The power input jack can accept 10 18 VDC the center pin is positive and sleeve is ground The input is diode protected to prevent damage if the power is applied with reversed polarity but the unit will not work until the reversed polarity condition is fixed Strain relief to avoid accidental disconnection can be provided with the included small hook and loop strip Attach the adhesive Rio Rancho NM USA 7 UCR211 MAIN WINDOW LCD Audio Levels reference levels for Msin Window LCD audio signal modulation from transmitter RF levels reference for RF level screen icon The Main Window displays information concerning the portal to menu selections for setting up the receiver and condition of the Pilot Tone antenna phase RF and audio searching for clear frequency channels See Menu signal levels and battery conditions for both the receiver Selections from Main Window and Frequency Scan and the associated transmitter It is a
12. the problem is not in the receiver e Receiver output is too low for the input of the device it is feeding Try increasing the output level of the UCR201 and lowering the input gain on the device the UCR211 is feeding e Transmitter input gain too high Check and or readjust input gain on transmitter according to the LEDs on the transmitter and then verify the setting with the audio meter in the main window e Audio output level too high for the device the UCR201 is feeding Lower the output level of the UCR211 LECTROSONICS INC UHF Compact Receiver SPECIFICATIONS AND FEATURES Operating Frequencies MHz Frequency Adjustment Range Receiver Type Frequency Stability Front end bandwidth Sensitivity 20 dB Sinad 60 dB Quieting Squelch quieting AM rejection Modulation acceptance Image and spurious rejection Third order intercept Diversity method FM Detector Antenna inputs Audio outputs Rear Panel XLR Front Panel Controls and Indicators LCD control panel menus include Main window Frequency window Audio output level adjustment Battery level tracking Scanning mode Audio test tone Transmitter battery type selection Rear Panel Controls and features Power Options Ext DC Int Batt Battery Life 9V alkaline 9V lithium Weight Dimensions System Audio Specifications UCR211 Receiver UM200C Transmitter Signal to Noise Ratio Distortion Frequency Response Block 21
13. 15900 581 Laser Rd Toll Free 800 821 1121 Rio Rancho NM 87174 Rio Rancho NM 87124 FAX 505 892 6243 USA USA Web http www lectrosonics com E mail sales lectrosonics com 18 LECTROSONICS INC UHF Compact Receiver Rio Rancho NM USA 19 LIMITED ONE YEAR WARRANTY The equipment is warranted for one year from date of purchase against defects in materials or workmanship provided it was purchased from an authorized dealer This warranty does not cover equipment which has been abused or damaged by careless handling or shipping This warranty does not apply to used or demonstrator equipment Should any defect develop Lectrosonics Inc will at our option repair or replace any defective parts without charge for either parts or labor If Lectrosonics Inc cannot correct the defect in your equipment it will be replaced at no charge with a similar new item Lectrosonics Inc will pay for the cost of returning your equipment to you This warranty applies only to items returned to Lectrosonics Inc or an authorized dealer shipping costs prepaid within one year from the date of purchase This Limited Warranty is governed by the laws of the State of New Mexico It states the entire liablility of Lectrosonics Inc and the entire remedy of the purchaser for any breach of warranty as outlined above NEITHER LECTROSONICS INC NOR ANYONE INVOLVED IN THE PRODUCTION OR DELIVERY OF THE EQUIPMENT SHALL BE LIABLE FOR ANY INDIRECT SPECIAL
14. NU buttons at the same time to leave the scan mode When leaving the scan mode you are given the option of using the frequency the unit was on before entering the scan mode or using the frequency just selected in the scan mode The display shows USE OLD and USE NEW to prompt you to make a frequency selection To accept the new frequency just selected in the scan mode press the DOWN button for USE NEW To return to the frequency you were using before entering the scan mode press the UP button for USE OLD the MENU button defaults to USE OLD Once you leave the scan mode the Frequency Window will be displayed Set your transmitter switches to the same settings as shown on the display and your system will be ready for operation LECTROSONICS INC UHF Compact Receiver ANTENNA USE AND PLACEMENT The receiver is supplied with two straight BNC antennas In some circumstances remote antennas such as the SNA600 or ALP700 may be useful for improving recep tion Position remote antennas at least three or four feet apart and so that they are also not within 3 or 4 feet of large metal surfaces If this is not possible try to posi tion the antennas so that they are as far away from the metal surface as is practical It is also good to position the receiver so that there is a direct line of sight be tween the transmitter and the receiver antenna In situations where the operating range is less than about 100 feet the antenna posit
15. UCR211 DIVERSITY UHF RECEIVER OPERATING INSTRUCTIONS LECTROSONICS INC M Rio Rancho N www lectrosonics com UCR211 2 LECTROSONICS INC UHF Compact Receiver TABLE OF CONTENTS GENERAL TECHNICAL DESCRIPTION Qusssssssssssssssssssssssssssssssssssssssssssssssssssseesees 4 DIVERSITY RECEPTION coocccccococonccononcnnonncnnonncnnnn canon iii 4 RF FREQUENCY TRACKING FRONT END AND 4 MICROCONTROLLER PLL AND VCO A EE 4 IF AMPLIFIERS AND SAW FILTERS 4 DIGITAL PULSE COUNTING 4 TRI MODE DYNAMIC FILTER 4 PILOT TONE eri i 5 SMART SQUELCHTM cilea 5 OUTPUT LEVEL ADJUST 5 TESTIONE piace 5 A A E inet 5 POWER SUPPLY sori rl ia 6 LCD DISPLAY cile ie 6 POWER UP SEQUENCE LL aaa aaa aaa aaa aaa aaa 6 Oe aa siai ia a ete is 6 FRONT PANEL CONTROLS AND 1 1 7 LE CEEEN A een ae II Pe ai 7 MENU BUTTON 7 SELECT UP DOWN 7 POWER ON OFF SWITCH 7 REAR PANEL FEATURES i instant i d st l 7 XLR AUDIO OUTPUT JACK ae 7 POWER INPUT JACK 7 MAIN WINDOW LCD m L L L T EL 8 MENU SELECTIONS FROM MAIN WINDOW cc sccccceecesecceeeeeee 9 FREQUENCY WINDOW 9 BATTERY LEVEL WINDOW 9 SETUP WINDOW a ist tienta t
16. ack The next screen that appears allows the level to be adjusted in 1dB steps using the UP and DOWN buttons When the audio test tone is enabled the received audio is muted and an internally generated 1kHz test tone is routed to the XLR connector Since there is only one audio output level setting for both received audio and tone the level set here will be retained in the receive mode it will supersede the setting made in the LEVEL setup screen The test tone has 5 distortion and is intended for confirmation of output levels only To exit the test tone screen and stop the tone press the MENU button TXBAT he TXBAT setup screen allows you to select the exact battery being used in the transmitter to provide more accurate battery level monitoring Four different types of batteries are commonly used in Lectrosonics transmitters 9 Volt alkaline 9 Volt lithium AA alkaline and AA lithium Correctly set this will ensure that the information in the MAIN and BATTERY LEVEL windows will be accurate and adequate warning will be provided in advance of battery failure Press MENU to leave this screen 4 TONE 00 dBu LVL 1K 00 dBu ji 9V Rio Rancho NM USA 9 UCR211 FREQUENCY SCAN MODE Scan Press All 3 Buttons E B8 L 4 To Exit Scan Mode Press All 3 a Buttons From Any Window USE OLD ss Freq USE NEW Window i 12 LQ I Fine View ee ito B8
17. act Receiver MENU SELECTIONS FROM MAIN WINDOW pia owon sg Off On Piot woo MENU pres Setup Window Press UP SETUP LEVEL seruP Tren TONE J RES 2 Sa Audio Test Tone Level LEVEL Press MENU TT Press UP 7 DOWN to adjust Audio Test Tone ATONE Press 4LVL 1K 5 _ __ 00 dBu 00 dBu Press UP DOWN to adjust SETUP Press UP TX BAT TX Battery Type 2 4TXBAT Press MENU 9V ALK GA SETUP ES Press UP DOWN to select From the Main Window you can navigate to the Fre quency Battery Level and Setup windows in a circular sequence by pressing the MENU button FREQUENCY WINDOW TV channel which television broad cast channel this frequency falls within Transmitter switch settings these are the correct switch settings for the frequency switches on your transmitter transmitter instructions TV40 AE 631 800 see your Frequency Press the Select Up and Select Down buttons to change the frequency of the receiver Be certain to change the transmitter switches to match the settings shown in the upper right hand corner If the transmitter frequency differs from the receiver by as much as one notch or 100kHz the pilot tone indicator on the receiver will drop out and the receiver audio will mute BATTERY LEVEL WINDOW This window shows the transmitter TX and receive
18. ale 9 l A tg end neater eel eee 9 Re 9 9 FREQUENCY SCAN 10 SCAN AND VIEW WINDOW ELEMENTS 10 FINE VIEW WINDOW ELEMENTS 10 ANTENNA USE AND PLACEMENT msreenznnzzzznzznzznzansznznzenzanzzzznanzzanzzzznzzzzaz 11 INSTALLATION AND OPERATING INSTRUCTIONS 12 FINDING CLEAR FREQUENCIES LL aka 12 LOCKING AND UNLOCKING THE UCR211 FRONT PANEL CONTROLS 13 REPLACING THE BATTERY cssssssssssssssssssssssssssssssssssssssessssssssstssssessssseessseesssses 14 UCR211 REPLACEMENT PARTS and ACCESSORIES 15 TROUBLESHOOTING oneccessssssssssssssssssssssssssssssstsssssessssssssssessssseesssesssssesssnesssseesee 16 SPECIFICATIONS AND FEATURES esssssssssssssssssssssssssssssssssssstessssesssseessseessssee 17 SERVICE AND REPAIR uosssssssssssssssssssssssssssssssssssstsssssesssssesssseessstesssseesssenssseessssee 18 RETURNING UNITS FOR REPAIR s meeesenzzznnenzzznnzznzznzznnzzznzznanzzaazazznazzzanzzza 18 LIMITED ONE YEAR WARRANTY sssssssssssssssssssssstssssscssssssssssessssen Back Cover Rio Rancho NM USA 3 UCR211 GENERAL TECHNICAL DESCRIPTION The UCR211 is a portable high performance triple conversion frequency synthesized UHF receiver fully compatible with all Lectrosonics 200 series transmitters
19. ator Squelch 23KHZ LP FILTER VARIABLE CUT OFF LP FILTER PILOT TONE DETECTOR Smart Diversity Rio Rancho NM USA UCR211 also has protection circuits that prevent damage to the receiver if a positive ground power source is applied LCD DISPLAY The display has four main windows Pressing the MENU button rotates through each of these windows If the battery gets low on either transmitter or receiver a message will interrupt the display every few seconds and flash a LOW BATTERY warning After power is turned off and back on again the unit defaults to the main window and to the most recent frequency audio level transmitter battery type and locked unlocked status settings These settings are retained even if the batteries are removed POWER UP SEQUENCE The power up sequence consists of four messages that appear automatically over a period of a few seconds after the power is switched on 1 LOCKED or UNLOCKED status 2 The name LECTROSONICS 3 The model number and firmware revision 4 The frequency block of operation After these introductory messages are displayed the main window will appear The UCR211 is fully operational during the power up sequence and will immediately respond to button pushes made before the automatic sequence is completed If a valid transmitter signal is already present when the receiver is turned on the audio output will typically
20. can be altered The receiver can be LOCKED or UNLOCKED from any of the four primary windows lt cannot be LOCKED from the scanning mode or from other subordinate screens Rio Rancho NM USA 13 UCR211 REPLACING THE BATTERY Lift and open the bottom battery door cover with your thumb rotate the door clockwise until it is perpendicular with the case and allow the battery to fall out of the compartment into your hand Retaining pins will prevent you from opening too far It is difficult to install the battery backwards Observe the large and small holes in the battery contact pad before inserting a new battery Insert the contact end of the battery first making sure the contacts are aligned with the holes in the contact pad and then swing the door closed You will feel it snap into place when it is fully closed CAUTION Lithium batteries will expand and swell if allowed to go into a deep discharge Be sure to remove lithium batteries as soon as the display starts flashing If lithium batteries are allowed to fully discharge while still inside the battery compartment they may be very difficult to remove Stuck lithium batteries can be avoided by removing the battery label wrapping before use This will allow the battery to swell but will still leave enough room in the compartment for the battery to fall out normally To open the battery compartment door push the door up and away from the case with your thumb then s
21. e audio system be adjusted to achieve the desired sound or signal levels 6 Adjust the Audio Output according to the type of input on your equipment Use the LEVEL menu and adjust the level with the SELECT Up and Down buttons The input levels of different cameras VCRs and PA equipment vary which may require that you adjust the AUDIO OUT to an intermediate posi tion Try different settings and listen to the results If the output of the receiver is too high you may hear distortion or a loss of the natural dynamics of the audio signal If the output is too low you may hear steady noise hiss along with the audio The UCR211 audio output is designed to drive any audio input device from microphone level to 10dBu line level Note The test tone output is especially useful for an exact level match With the test tone running adjust for the maximum desired peak level using the metering on the connected device Output Le 25V XLR Non Polar OUT 50 2 HI COMMON 2K 3 LO 50 Adjust Squelch UCR211 Simplified Audio Output Circuit FINDING CLEAR FREQUENCIES The folllowing procedure will help you identify RF signals in the area and find clear channels for operating the wireless system 1 3 Ensure transmitter is turned off Turn on the receiver and wait a few seconds until the Main Window appears on the LCD Ensure the receiver is not in PILOT TONE BYPASS mode A P wi
22. e presence or absence of a pilot tone This mode is useful for locating a clear frequency since any potential interference may be heard It may also be used in situations where squelching behavior is undesirable The PILOT TONE BYPASS disables the squelch as described below SMART SQUELCH The UCR211 employs a sophisticated squelching system in an attempt to deliver the cleanest possible audio during marginal conditions of reception Any squelching system faces inevitable trade offs squelch too much and valuable audio information may be lost squelch too little and excessive noise may be heard respond too rapidly and the audio sounds choppy respond too sluggishly and syllables or entire words can be cut off The UCR211 combines several techniques to achieve an optimal balance removing distracting noise without the squelching action itself becoming a distraction One of these techniques involves waiting for a word or syllable to complete before squelching Another incorporates recent squelching history and recent signal strength gt FILTER uP uP 151 SYNTHESIZE FILTER vco LCD E2PROM Display Panel uF r Aattenuation Smart Squelch 3RD MIXER AND IF AMP XTAL H CONTROLLED 3rd OSCILLATOR H Te H UHF Compact Receiver adjusting squelching behavior dvnamicallv for the most serviceable result under variable conditions Usin
23. g these and other techniques the UCR211 can deliver accept able audio qualitv from otherwise unusable signals In the PILOT TONE BVPASS mode the squelch svstem is disabled Received audio remains unmuted at all times with this setting OUTPUT LEVEL ADJUST One of several setup screens is provided for adjusting the audio output level in 1dB steps from 50 to 10dBu using the UP and DOWN buttons on the front panel TEST TONE The UCR211 provides a 1kHz audio test tone at the XLR connector for level adjustment of connected equipment The level is adjustable from 50 to 10 dBu in 1 dB steps to allow a precise match BATTERIES The UCR211 operates on two 9V alkaline or lithium batteries Access to the battery compartment is gained by lifting one end and turning the rear panel door NOTE Do not use an alkaline and a lithium in the same unit Standard or heavy duty batteries are not recom mended POWER SUPPLY The UCR211 may be operated from an external DC source see Specifications and Features section for allowed voltages The receiver has a built in Poly Fuse to protect the unit This fuse resets if the power supply is disconnected for about 15 seconds The power section UCR211 BLOCK DIAGRAM COUNTING DETECTOR 50KHz LP FILTER Output Level Adjust 21 EXPANDER cid are TREBLE XLR Squelch UT 5 o 5 0 o 2 HI i 1 COMMON r 2K o 26 03 LO Digital Digital Attenu
24. ioning is much less critical The antennas can also be configured with one whip mounted directly onto the panel of the receiver and the other one mounted remotely Be careful about the length of cabling from antenna to receiver Long cable runs can have serious signal loss Lectrosonics has in line RF amplifiers suitable for compensating for long cable runs Contact your dealer or the factory for more information A wireless transmitter sends a radio signal out in all directions This signal will often bounce off nearby walls ceilings etc and a strong reflection can arrive at the receiver antenna along with the direct signal If the direct and reflected signals are out of phase with each other a cancellation may occur The result would be a dropout A dropout sounds like either audible noise hiss or in severe cases may result in a complete loss of the carrier and the sound when the transmitter is positioned in certain locations in the room A UHF dropout normally sounds like a short hiss or a swish ing sound Moving the receiver or if remote antennas are used the antennas even a few inches will change the sound of the hum or hiss or eliminate it A dropout situation may also become either better or worse as the crowd fills and or leaves the room or when the transmit ter or receiver is operated in a different location The receiver offers a sophisticated diversity design which overcomes dropout problems in almo
25. ll be blinking in the upper left corner of the Main Window ilot Tone Indicator Pilo 40 20 0 dB Simultaneously press the MENU and SELECT Up and Down buttons to enter Scan Mode Pilot 40 20 0 dB Div RF Aud RxTx WECTRO ucR211___ Press all three buttons at the same time and the receiver will start scanning View the LCD while the receiver is scanning The vertical marker will move across the display from left to right RF activity will be indicated by dark areas in the display LECTROSONICS INC Vertical marker moves left to right ScA 1000 100 B8 10 1 uv RF activity Strength of RF activity is indicated in microvolts with markings on the front panel 5 RF signal strength is indicated by markings in microvolts on the front panel to the left of the LCD Look for clear channels in the spectrum where there is no RF activity Scanning will repeat and continue until a button is pressed Scan E B8 a L AW o RF activitv clear channel 6 If necessary press the MENU button to zoom in for greater detail for fine adjustment Fa Fine adjustment be made when zoomed closer 8 Then press the SEL Up and Down arrows to move the marker to the middle of a clear area where there is no RF activity If an area with no RF activity cannot be found anywhere in the spectrum locate one with the least amount of RF activity 1000 100 B8
26. lso the access Mode Description Pilot tone indicator A steady P icon is displayed when a pilot tone from the associ ated transmitter is present The icon flashs if no pilot tone is detected and will change to a small b if the pilot tone has been bypassed To bypass the pilot tone press and hold MENU then press the SELECT Up button PRess and hold MENU and press SELECT UP again to restore normal pilot tone squelch Antenna Phase indicator Shows antenna phase switching activity As the antenna phase is switched the symbol will flip vertically RF level Changes in size vertically to indicate the strength of the incoming RF signal RF levels are engraved from 1 uV to 1000 uV on the bezel to the left of the LCD Audio Levels Changes in size horizontally to indicate the audio level modulation of the signal received from the transmitter The icon changes to a solid rectangular block when the audio signal is being limited in the transmitter Levels in dB are engraved into the bezel above the LCD Battery Levels Rx indicates the receiver battery condition and will flash when approxi mately one hour of operational time is remaining The Tx symbol works in the same manner to indicate the transmitter battery condition The Tx icon usually appears 5 to 10 seconds after the transmitter signal is acquired When external power is being used the Rx battery icon changes to look like a power plug LECTROSONICS INC UHF Comp
27. on same frequency e The pilot tone bypass has been activated Hold MENU and press UP to reset works only from the Main Window Note The PILOT indicator on the front panel shows as a solid P to indicate that the audio has been turned on at the transmitter and that the audio output on the receiver is enabled When the is on the audio is enabled If the P is flashing the pilot tone is not detected and the audio will be muted squelched When the pilot tone is bypassed the P icon changes to a b shape e Receiver may need to be moved or reoriented e Transmitter antenna may be defective or poorly connected e Improper length of antenna or wrong antenna on transmitter UHF whip antennas are generally about 3 to 5 inches long UHF helical antennas may be shorter but are often less efficient e Make certain frequency switches on transmitter match the receiver frequency setting e Check battery in transmitter e Transmitter gain set too low e The noise may not be in the wireless system Turn the transmitter audio gain all the way down and see if the noise remains If the noise remains then turn the power off at the transmitter and see if it remains If the noise is still present then the problem is not in the transmitter e If noise is still present when the transmitter is turned off try lowering the audio output level on the UCR201 and see if the noise lowers correspondingly If the noise remains
28. r RX battery voltage in tenth volt increments These levels will flash when the voltages drop below suggested optimum working levels Typically TX 7 RX 8 2V 2V there will be about one hour operating time remaining after the indicators begin to flash The RX voltage changes to EX when operating on external power and displays the external power source voltage Disclaimer We don t guarantee 0 1 Volt accuracy SETUP WINDOW In the SETUP window the UP and DOWN buttons scroll through a list of four possible destinations EXIT LEVEL TONE and TXBAT Each of SETUP EXIT these destinations allows a variety of settings to custom ize the receiver operating parameters Press MENU at the screen shown here to return to the main window Main Window EXT Press All Buttons SA SELECT Press amp Ho Hold ME MENU Lock Unlock 2 KA au TV40 AE Pres went 631 800 Va sv E a Frequency TX 7 2V RX 8 2V Battery Level Window Window LEVEL The LEVEL setup screen shows the audio output level of the receiver in dBu Use the UP or DOWN buttons to change the level 4 LEVEL Range is from 50 to 9 dBu in 1dB 50 dBu steps Press MENU to leave this screen TONE The TONE setup screen enables an audio test tone at the receiver output for precise level matching with other equipment The first screen prompts you to press the UP button to enable the tone at the receiver output j
29. s Outputs from the microcontroller operate the front end tuning PLL VCO circuits antenna phase switch drive the LCD display and backlight and control the squelch and audio output attenuator The microcontroller also generates an audio test tone used to adjust input levels of the equip ment being fed by the receiver The UCR211 design and the advanced technology of the microprocessor control arguably set a new standard in wireless microphone development IF AMPLIFIERS AND SAW FILTERS The first IF low noise amplifier is controlled with feed back regulation and drives the first of two quartz SAW Surface Acoustical Wave filters The 244 MHz SAW filters combine sharp tuning constant group delay wide bandwidth and excellent temperature stability far supe rior to conventional LC filters The 244 MHZ first IF signal is converted to 10 7 MHz filtered through two ceramic filters for sharp selectivity then converted to 300 kHz in one integrated circuit DIGITAL PULSE COUNTING DETECTOR The UCR211 receiver uses an elegantly simple yet highly effective digital pulse detector to demodulate the FM signal rather than a conventional quadrature detec tor This unusual design eliminates thermal drift im proves AM rejection and provides very low audio distortion TRI MODE DYNAMIC FILTER The audio signal is passed through a dynamic noise reduction circuit that automatically controls the audio cutoff frequency The cutoff frequenc
30. st any situation In the event however that you do encounter a dropout problem first try moving the receiver or antennas if remote antennas are used at least three or four feet from where their original position This may alleviate the dropout problem at that location If dropouts are still a problem try moving the unit or antennas to an entirely different location in the room or moving the receiver closer to the transmitter location Lectrosonics transmitters radiate power very efficiently and the receivers are very sensitive This reduces dropouts to an insignificant level If however you do encounter dropouts frequently call the factory or consult your dealer There is probably a simple solution REFLECTIVE SURFACE ULIIIL IL ILL LIL IL ILL LIL ILL LLL LLL LIL LLL LLL TRANSMITTER PHASE CANCELLATION RECEIVER MULTI PATH DROPOUT Rio Rancho NM USA 11 UCR211 12 INSTALLATION AND OPERATING INSTRUCTIONS Install a fresh battery or connect an external power source to the UCR211 Unless frequency settings have been previously assigned scan for an open frequency and set both the receiver and transmitter to that fre quency See Finding Clear Frequencies Connect the audio cable to the Receiver Audio Out XLR jack Set the Power ON OFF switch to ON and verify that the LCD panel
31. t takes almost as much time and effort to determine what is wrong as it does to make the repair there is a charge for an exact quotation We will be happy to quote approximate charges by phone for out of warranty repairs RETURNING UNITS FOR REPAIR You will save yourself time and trouble if you will follow the steps below A DO NOT return equipment to the factory for repair without first contacting us by letter or by phone We need to know the nature of the problem the model number and the serial number of the equipment We also need a phone number where you can be reached 8 am to 4 pm Mountain Standard Time B After receiving your request we will issue you a return authorization number R A This number will help speed your repair through our receiving and repair departments The return authorization number must be clearly shown on the outside of the shipping container C Pack the equipment carefully and ship to us shipping costs prepaid If necessary we can provide you with the proper packing materials UPS is usually the best way to ship the units Heavy units should be double boxed for safe transport D We also strongly recommend that you insure the equipment since we cannot be responsible for loss of or dam age to equipment that you ship Of course we insure the equipment when we ship it back to you Mailing address Shipping address Telephones Lectrosonics Inc Lectrosonics Inc Regular 505 892 4501 PO Box
32. wing open 14 LECTROSONICS INC UHF Compact Receiver UCR211 REPLACEMENT PARTS and ACCESSORIES Partio Desoriptioi Velcro mounting strips Zippered padded vinyl system pouch AC power supply Thin velcro loop for power cable strain relief UHF marine phosphor bronze antenna straight connector specify block Rio Rancho NM USA 15 UCR211 TROUBLESHOOTING POWER SUPPLY AND FUSE LCD display not active PILOT TONE SQUELCH PILOT indicator is solid but no sound PILOT P keeps flashing when transmitter audio switch is turned on Noise on audio and Pilot indicator is b ANTENNAS AND RF SIGNAL STRENGTH RF Level is weak No RF Signal AUDIO SIGNAL QUALITY Poor signal to noise ratio Distortion 16 e External power supply disconnected or inadequate e Main power supply fuse tripped Turn the receiver off remove the cause of the overload and turn the receiver back on e Wrong polarity power source The external DC in requires POSITIVE to be on the center pin e Battery may be low Try a fresh battery e Audio output cable bad or disconnected e Audio Output level set too low Use the built in test tone to verify levels e It takes several seconds for the relay to actuate the PILOT Turn on the transmitter power and the audio switch on some models and wait 3 to 5 seconds for the P to indicate steadily e Transmitter and receiver not
33. y of this filter is varied automatically by measuring the amplitude and frequency of the audio signal and the quality of the RF signal The audio bandwidth is held only to that point necessary to pass the highest frequency audio signal present at a given moment This results in a dramatic reduction of the higher frequency hiss normally present particularly with low RF signal levels During passages of high frequency audio content this filter dynamically passes the signals with no decrease in high frequency content This filter has proven very effective and is totally transparent PILOT TONE MUTE The UCR211 uses a pilot tone muting technique in order to protect against the reception of stray signals The Lectrosonics transmitter adds an inaudible signal known as the pilot tone to the transmitted signal The receiver detects and removes the pilot tone and is thus able to 4 LECTROSONICS INC identify the desired signal and mute all others If the transmitter frequency differs from the receiver by as much as one notch or 100kHz the pilot tone indicator on the receiver will drop out and the receiver audio will mute When the receiver is powered up receive audio is muted unless a proper pilot tone is detected The pilot tone must be present for approximately one second before the signal is accepted The PILOT TONE BYPASS mode is set from the main window In this mode the received audio remains unmuted regardless of th
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