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UCR411A

LECTROSONICS, INC.

20

Pre-coordinated Frequencies

Interference from IM (intermodulation) is a potential 

problem in all multi-channel wireless systems, so proper 

frequency coordination is always required to avoid 

noise, range and dropout problems. Your options to ac-

complish this include: 

 

•   Using the pre-coordinated frequency groups

 

 

•  Performing a system checkout

 

 

  (See Multi-channel System Checkout) 

 

•   Calling Lectrosonics for assistance

Groupings of compatible frequencies have been cre-

ated to minimize intermodulation problems in multiple 

channel wireless systems. The frequencies can be used 

with Digital Hybrid and analog Lectrosonics wireless 

equipment. Compatibility with other brands is likely, but 

not guaranteed by Lectrosonics.

Pre-coordinated fre-

quencies within each 

block are arranged in 

four groups (Grp) as 

shown at right.
Example:  Block 22
The uppermost eight 

frequencies comprise 

Grp a, the eight just 

below them comprise 

Grp b, and so on.
Grp a and Grp b are 

compatible with one 

another.
Grp c and Grp d are 

compatible with one 

another.
There is no assurance 

that the upper 16 (a,b) 

are compatible with the 

lower 16 (c,d).

BLOCK 22

FREQ

SW SET US TV CH

563.700

0,5

tv29

564.300

0,B

tv29

565.200

1,4

tv29

565.800

1,A

tv29

567.100

2,7

tv30

568.000

3,0

tv30

568.500

3,5

tv30

569.300

3,D

tv30

575.700

7,D

tv31

577.900

9,3

tv31

578.600

9,A

tv32

579.900

A,7

tv32

581.700

B,9

tv32

582.600

C,2

tv32

585.200

D,C

tv33

587.500

F,3

tv33

BLOCK 22

FREQ

SW SET US TV CH

570.100

4,5

tv30

570.700

4,B

tv30

571.600

5,4

tv30

572.200

5,A

tv31

573.200

6,4

tv31

574.400

7,0

tv31

574.900

7,5

tv31

575.500

7,B

tv31

581.100

B,3

tv32

582.100

B,D

tv32

582.600

C,2

tv32

584.300

D,3

tv32

585.000

D,A

tv32

585.600

E,0

tv32

586.300

E,7

tv32

588.100

F,9

tv32

Grp a

Grp b

Grp c

Grp d

NOTE:  Pre-coordinated frequencies do not guard 

against interference from outside sources.

When a pre-coordinated group is selected, it is still nec-

essary to check for interference from outside sources. 

Groups a, b, c and d each store 8 frequencies. After 

selecting one of these groups, step through each fre-

quency one at a time and check for interference before 

trying to use the frequency.
To check for interference, set the frequency on the 

receiver, then return to the Main Window and observe 

the RF level indicator 

with the matching transmitter 

turned OFF

.

RF Level Indicator

Even a weak signal, as shown here, will have a sig-

nificant effect on operating range and dropouts. When 

interference is present with the transmitter turned off, a 

warning message will flash on the screen periodically.

Summary of Contents for UCR411A

Page 1: ...UCR411A Digital Hybrid Wireless Compact UHF Receiver US patent 7 225 135 INSTRUCTION MANUAL Rio Rancho NM USA www lectrosonics com Fill in for your records Serial Number Purchase Date ...

Page 2: ...UCR411A LECTROSONICS INC 2 ...

Page 3: ...ers and detector to capture the encoded signal and a DSP recovers the original digital audio This digital analog hybrid technique has some very bene ficial properties Because the information being transmit ted is digitally encoded immunity to noise is much higher than a compandor can offer Because the encoded audio is sent in analog format spectral and power efficiency and operating range are not ...

Page 4: ...UCR411A LECTROSONICS INC 4 ...

Page 5: ... XLR Audio Output Jack 9 Power Input Jack 9 Main Window LCD 10 Menu Selections from Main Window 11 Frequency Window 11 Battery Level Window 11 SETUP Window 12 LEVEL Setup Screen 12 TONE Setup Screen 12 TXBAT Setup Screen 12 PHASE Setup Screen 12 SmartNR Setup Screen 12 TUNING Setup Screen 13 COMPAT Setup Screen 13 Frequency Scan Mode 14 Scan VIEW WINDOW Elements 14 Fine VIEW WINDOW Elements 14 Ant...

Page 6: ...he phase diversity network and PIN diode RF switches are controlled by the microprocessor using a sophisticated algorithm to use both antennas simultaneously This design keeps the receiver compact enough for camera mounting or shoulder bag applications yet provides effective diver sity reception RF Frequency Tracking Front End and Mixer The receiver is frequency agile and can be set to oper ate on...

Page 7: ...irectly The UCR411A employs a sophisticated squelching sys tem 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 syllabl...

Page 8: ...on again the unit defaults to the Main window and to the most recent frequency audio level transmitter battery type and other user settings These settings are retained even if the batteries are removed After five minutes of no key activity the LCD backlight times out and reverts back to last screen used when reactivated Power Up Sequence The power up sequence consists of four messages that appear ...

Page 9: ...LR configuration with pin 2 posi tive with reference to hand held and plug on transmit ters With lavaliere microphones and belt pack trans mitters however phase will vary with different types of microphones 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...

Page 10: ...aved from 1uV to 1000uV on the bezel to the left of the LCD display Audio Level This icon changes in size horizontally to indicate the audio level modulation of the signal received from the transmitter The icon display will change 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 display Battery Levels The ...

Page 11: ... left hand corner of the Frequency window Menu Selections from Main Window When the TUNING mode is set to NORMAL the SEL Up and Down buttons tune in single channel incre ments In the group tuning modes the SEL Up and Down buttons move among the selected intermod free frequencies Tuning shortcuts In NORMAL tuning mode MENU UP and MENU DOWN tune in 16 channel increments for faster tuning In the grou...

Page 12: ...as well as in the 200 Series compatibility mode the TXBAT menu offers six choices 9V ALK Transmitter uses a 9V alkaline battery Monitor voltage with battery icon in main window 9V LTH Transmitter uses a 9V lithium battery Moni tor voltage with battery icon in main window 9V TIM Transmitter uses a 9V battery Display its voltage normally in the battery level window but monitor its status with the ba...

Page 13: ...up with no entries reverts to non group mode behavior i e access is allowed to all 256 available frequencies in the selected receiver module s frequency block However once a frequency has been added to the tuning group this behavior changes to group mode behavior where the MENU button must be pressed and held while either the SEL Up or Down buttons are pressed to access frequencies that are not pa...

Page 14: ...or right to view the entire spectrum of the receiver by pressing the SEL Up and Down buttons Pressing the SEL Up button will make the display scroll left showing higher frequencies Pressing the SEL Down button will make the display scroll right showing lower frequencies The cursor remains in place while the display scrolls left or right In addition to assessing the congestion within the RF tuning ...

Page 15: ...ith each other a cancellation may occur The result would be a drop out 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 Antenna Use and Placement A UHF dropout sounds like a very brief sshhht or a swishing sound Moving the transmitter even a few inches will change th...

Page 16: ... 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 position Try dif ferent settings and listen to the results If the output of the receiver is too high you may hear distor tion or a loss...

Page 17: ...hat was set before scanning Pilot Div RF Aud Rx Tx BAT 40 20 0 dB 1000 100 10 1 uV OFF ON MENU SEL 1 2 Use the SEL Up and Down arrow buttons to select the old or new frequency Locking and Unlocking the UCR411A Front Panel Controls The front panel controls can be LOCKED to prevent accidental changes being made during operation and handling To LOCK the UCR411A Press and hold the MENU button until a ...

Page 18: ...ant pressure The door with snap into place 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 possible after they are depleted If lithium batteries are allowed to fully discharge while still inside the battery compartment they will be very difficult to remove Stuck lithium batteries can...

Page 19: ... the specified block the exact length is not critical for useful performance in whip dipole and coaxial designs BLOCK FREQUENCY CAP ANTENNA RANGE COLOR WHIP LENGTH 470 470 100 495 600 Black w Label 5 47 19 486 400 511 900 Black w Label 5 19 20 512 000 537 500 Black w Label 4 95 21 537 600 563 100 Brown 4 73 22 563 200 588 700 Red 4 47 23 588 800 614 300 Orange 4 23 606 606 000 631 500 Use Block 24...

Page 20: ... 564 300 0 B tv29 565 200 1 4 tv29 565 800 1 A tv29 567 100 2 7 tv30 568 000 3 0 tv30 568 500 3 5 tv30 569 300 3 D tv30 575 700 7 D tv31 577 900 9 3 tv31 578 600 9 A tv32 579 900 A 7 tv32 581 700 B 9 tv32 582 600 C 2 tv32 585 200 D C tv33 587 500 F 3 tv33 BLOCK 22 FREQ SW SET US TV CH 570 100 4 5 tv30 570 700 4 B tv30 571 600 5 4 tv30 572 200 5 A tv31 573 200 6 4 tv31 574 400 7 0 tv31 574 900 7 5 ...

Page 21: ...odules are on clear channels go to step 3 3 Turn each transmitter on one at a time Start with all transmitters turned off As you turn on each one look at the matching receiver to verify a strong RF signal is received Then look at the other receivers and see if one of them is also picking up the signal Only the matching receiver should indi cate a signal Change frequencies on either system slightly...

Page 22: ...receiving pattern is required as op posed to a directional pattern ALP Series ALP500 ALP620 ALP650 Shark fin Log Periodic Dipole Array LPDA antennas provide useful directional pattern over 500 to 800 MHz range Ideal for portable applica tions including temporary setups for field production ARG15 ARG100 Coaxial cables for remote antennas are available from Lectrosonics in a variety of lengths from ...

Page 23: ...d wait 3 to 5 seconds for the P to indicate steadily Transmitter and receiver not on same frequency Receiver compatibility mode does not match the transmitter in use See Menu Selections from Main Window COMPAT Window Noise on audio and Pilot Tone Indicator is b The pilot tone bypass has been activated Hold MENU and press UP to reset works only from the Main Window Pilot Tone Indicator not present ...

Page 24: ... 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 If noise is still present when the transmitter is turned off try lowering the audio output level on the UCR411A and see if the noise lowers correspondingly If the noise remains the problem is not in the receiver Receiver output is too low for the input of the d...

Page 25: ... window Pilot tone antenna phase receiver battery level transmitter battery status audio level RF level Frequency window Frequency TV channel Transmitter switch setting Audio output level adjustment 50 dBu to 5 dBu Battery level tracking Receiver and transmitter 9V battery in 1 10th volt steps accuracy 0 2V Transmitter AA battery x xxV format accuracy 0 05V Timer option available when transmitter ...

Page 26: ...irs Returning Units for Repair For timely service please follow the steps below A DO NOT return equipment to the factory for repair without first contacting us by email 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 A M to 4 P M U S Mountain Standard Time B After receiving your req...

Page 27: ...UHF Digital Hybrid Wireless Receiver Rio Rancho NM 27 ...

Page 28: ...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 ...

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