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Digital Belt-Pack Transmitter

Rio Rancho, NM

Microphone RF Bypassing

When used on a wireless transmitter, the microphone

element is in the proximity of the RF coming from the

transmitter. The nature of electret microphones makes

them sensitive to RF, which can cause problems with

microphone/transmitter compatibility. If the electret mi-

crophone is not designed properly for use with wireless

transmitters, it may be necessary to install a chip capaci-

tor in the mic capsule or connector to block the RF from

entering the electret capsule.
Some mics require RF protection to keep the radio signal

from affecting the capsule, even though the transmitter

input circuitry is already RF bypassed.
If the mic is wired as directed, and you are having dif-

ficulty with squealing, high noise, or poor frequency

response, RF is likely to be the cause.
The best RF protection is accomplished by installing RF

bypass capacitors at the mic capsule. If this is not pos-

sible, or if you are still having problems, capacitors can

be installed on the mic pins inside the TA5F connector

housing. Refer to the diagram below for the correct loca-

tions of capacitors.
Use 330 pF capacitors. Capacitors are available from

Lectrosonics. Please specify the part number for the

desired lead style.

Leaded capacitors: P/N 15117

Leadless capacitors:

P/N

SCC330P

All Lectrosonics lavaliere mics are already bypassed and

do not need any additional capacitors installed for proper

operation.

CAPSULE

SHIELD

AUDIO

SHIELD

AUDIO

BIAS

TA5F

CONNECTOR

TA5F

CONNECTOR

2-WIRE MIC

3-WIRE MIC

Capacitors next

to mic capsule

Capacitors in

TA5F connector

Line Level Signals

The wiring for line level and instrument signals is:

•  Signal Hot to pin 5
•  Signal Gnd to pin 1
•  Pin 4 jumped to pin 1

This allows signal levels up to 3V RMS to be applied

without limiting.

NOTE for line level inputs only (not instrument):

If more headroom is needed, insert a 20 k

resistor in series with pin 5. Put this resistor

inside the TA5F connector to minimize noise

pickup. The resistor will have little or no effect

on the signal if the input is set for instrument.

See Fig. 8 on

previous page

Line Level

Normal Wiring

Line Level

More Headroom

(20 dB)

Содержание DBu

Страница 1: ...NSTRUCTION MANUAL Rio Rancho NM USA www lectrosonics com Fill in for your records Serial Number Purchase Date WARNING Moisture including talent s sweat will damage the transmitter Wrap the DBu in a plastic baggie or other protection to avoid damage ...

Страница 2: ...ro phone systems High entropy encryption keys are first created by a Lectrosonics receiver such as the DSQD Receiver The key is then synced with the DBu via the IR port The audio will be encrypted and can only be decoded if both DBu and receiver have the matching en cryption keys If you are trying to transmit an audio signal and keys do not match all that will be heard is silence Table of Contents...

Страница 3: ...ify and wish to apply for a license go to http www fcc gov Forms Form601 601 html Servo Bias Input and Wiring The DBu DBu E01 input preamp is a unique design that delivers audible improvements over conventional trans mitter inputs is easier to use and much harder to over load It is not necessary to introduce pads on some mics to prevent overload of the input stage divide the bias voltage down for ...

Страница 4: ...or rechargeable batteries can be used to power the transmitter The type of batteries in use are selectable in a menu on the LCD When alkaline or lithium batteries are being used the LED labeled BATT on the keypad glows green when the batteries are good The color changes to red when the they are nearing the end of life When the LED begins to blink red there will be only a few minutes remaining The ...

Страница 5: ...ulation Indicators Programmable Function Switch Audio Input Jack Antenna Port Belt clip mounting hole Battery status LED Full access to all settings is provided through the keypad and LCD The transmitter can also be configured as a one button device by locking the ability to make chang es with the keypad and configuring the top panel switch as power on off Battery compartment door Key verification...

Страница 6: ...yed previously NOTE If the programmable switch is in the OFF position power can still be turned on with the power button If the programmable switch is then turned on a brief message will appear on the LCD Connecting the Signal Source The input jack is a rugged 3 pin LEMO connector with a threaded locking sleeve Main Menu and Setup Screen Details Entering the Main Menu The LCD and keypad interface ...

Страница 7: ...elect option with arrow buttons to select R e m o t e E n a b l e I g n o r e O n O f f or to go back to get key to send key I R K e y Select option with arrow buttons to select S e n d F r e q Sync S e n d F r e q S e n d A l l S e n d A l l G e t F r e q G e t F r e q G e t A l l G e t A l l Select option with arrow buttons to select K e y T y p e K e y T y p e S t a n d a r d I R S Y N C O K I ...

Страница 8: ...ed 4 Use the and arrow buttons to adjust the gain until the 10 dB glows green and the 20 dB LED starts to flicker red during the loudest peaks in the audio 5 Once the audio gain has been set the signal can be sent through the sound system for overall level adjustments monitor settings etc 6 If the audio output level of the receiver is too high or low use only the controls on the receiver to make a...

Страница 9: ... encrypted and can only be listened to if the receiver has the matching encryption key The DBu has four options for encryption keys Universal This is the most convenient and basic option available and the default setting on all Lec trosonics D2 digital units All encryption capable Lectrosonics transmitters and receivers contain the Universal key The key does not have to be gener ated in the DCR822...

Страница 10: ...ogrammable switch will continue to operate whether or not settings are locked Selecting Battery Type The voltage drop over the life of batteries varies by type and brand Be sure to set the correct battery type for accurate indications and warnings The menu offers alkaline or lithium types BatType Alk Lith If you are using rechargeable batteries it is better to use the timer function on the receive...

Страница 11: ...ss such a broad frequency range it is best to use the appropriate antenna for maximum operation Two antennas are included with the transmitter and are shipped from the factory pre cut and fully assembled Each antenna covers three blocks Use the chart below to determine which antenna best fits your needs Frequency Cap Band Block Range MHz Color Antenna A1 470 470 100 495 600 Black AMM19 19 486 400 ...

Страница 12: ...rcuitry and voltage source for 4 volt servo bias wiring PIN 3 Microphone level input and bias supply PIN 4 Bias voltage selector for Pin 3 Pin 3 voltage depends on Pin 4 connection Pin 4 tied to Pin 1 0 V Pin 4 Open 2 V Pin 4 to Pin 2 4 V PIN 5 Line level input for tape decks mixer outputs musical instruments etc Installing the Connector 1 If necessary remove the old connector from the microphone ...

Страница 13: ...hown Microphone Cable Termination for Non Lectrosonics Microphones TA5F Connector Assembly Mic Cord Stripping Instructions 1 2 3 4 5 VIEW FROM SOLDER SIDE OF PINS 0 3 0 15 Crimping to Shield and Insulation Shield Insulation Strip and position the cable so that the clamp can be crimped to contact both the mic cable shield and the insulation The shield contact reduces noise with some microphones and...

Страница 14: ... 2k to 4k ohms Fig 4 Fig 11 4 VOLT POSITIVE BIAS 3 WIRE ELECTRET NOTE This servo bias wiring is not compatible with earlier versions of Lectrosonics transmitters Check with the factory to confirm which models can use this wiring 2 VOLT POSITIVE BIAS 2 WIRE ELECTRET Simplified wiring for microphones such as Countryman B6 Lavalier and E6 Earset models and others NOTE This servo bias wiring is not co...

Страница 15: ...lems capacitors can be installed on the mic pins inside the TA5F connector housing Refer to the diagram below for the correct loca tions of capacitors Use 330 pF capacitors Capacitors are available from Lectrosonics Please specify the part number for the desired lead style Leaded capacitors P N 15117 Leadless capacitors P N SCC330P All Lectrosonics lavaliere mics are already bypassed and do not ne...

Страница 16: ... length LTCVR Silicone cover prrotects from moisture and dust Supplied Accessories P N 26895 Wire belt clip 40096 Alkaline Batteries 2 Alkaline batteries Brand may vary AMM19 and AMM22 Lectrosonics provides dipole whip antennas for use with the WM transmitter The antennas are cut to the frequency range shown in the chart at left and include a 50 Ohm SMA connector Optional Accessories BCSLEBN Sprin...

Страница 17: ... has a mechanism to prevent accidental activation of the tone iOS The iPhone version keeps each available setting on a separate page with the list of options for that setting On iOS the Activate toggle switch must be enabled to show the button which will then activate the audio The iOS version s default orientation is upside down but can be configured to orient right side up The purpose for this i...

Страница 18: ...Ds indicate modulation of 20 10 0 and 10 dB referenced to full modulation LCD bar graph Controls Top panel toggle switch programmable as power mute or none off function Side panel membrane switches with LCD interface for power on off and all setup and configuration controls Audio Input Jack Switchcraft 5 pin locking TA5F Antenna Galvanized steel flexible wire Battery Two AA Duracell Ultra recommen...

Страница 19: ...oper Audio Modulation 2 Receiver output is disconnected cable is defective or miswired 3 Sound system or recorder input is turned down Distorted Sound 1 Transmitter gain audio level is too high Check Modulation LEDs on transmitter and receiver while distortion is being heard 2 Receiver output level may be mismatched with the sound system or recorder input Adjust output level on receiver to the cor...

Страница 20: ... 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 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 outs...

Страница 21: ...Digital Belt Pack Transmitter Rio Rancho NM 21 ...

Страница 22: ...DBu DBu E01 LECTROSONICS INC 22 ...

Страница 23: ...Digital Belt Pack Transmitter Rio Rancho NM 23 ...

Страница 24: ...trosonics 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 bre...

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