Lectrosonics UM250C Скачать руководство пользователя страница 2

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The UM250B transmitter is FCC type accepted under Part 74: 470-608MHz and 614-806MHz

TABLE OF CONTENTS

INTRODUCTION ..................................................................................................... 3

GENERAL TECHNICAL DESCRIPTION ............................................................... 4

CONTROLS AND FUNCTIONS ............................................................................. 6

BATTERY INSTALLATION ..................................................................................... 8

OPERATING INSTRUCTIONS ............................................................................... 8

OPERATING NOTES ............................................................................................. 9

ADJUSTING THE TRANSMITTER FREQUENCY ................................................ 9

MICROPHONE CORD TERMINATION ................................................................ 10

5-PIN INPUT JACK WIRING ............................................................................... 11

TROUBLESHOOTING .......................................................................................... 14

SERVICE AND REPAIR ....................................................................................... 15

RETURNING UNITS FOR REPAIR ..................................................................... 15

SPECIFICATIONS AND FEATURES .................................................................. 16

WARRANTY ............................................................................................ Back cover

Содержание UM250C

Страница 1: ...UM250C FREQUENCY AGILE UHF BELT PACK TRANSMITTER LECTROSONICS INC Rio Rancho NM www lectrosonics com OPERATING INSTRUCTIONS and trouble shooting guide...

Страница 2: ...HNICAL DESCRIPTION 4 CONTROLS AND FUNCTIONS 6 BATTERY INSTALLATION 8 OPERATING INSTRUCTIONS 8 OPERATING NOTES 9 ADJUSTING THE TRANSMITTER FREQUENCY 9 MICROPHONE CORD TERMINATION 10 5 PIN INPUT JACK WI...

Страница 3: ...er adjustable to adapt to varying acoustic environments and preferences The UM250C is a rugged machined aluminum package with a removable spring loaded belt clip The input section provides a correct i...

Страница 4: ...frequency audio distortion will be low but high frequency transients will then be distorted The 200 system introduces an entirely new approach to solving this basic problem called dual band compandin...

Страница 5: ...the receiver so that it does not influence the compandor or various gain stages The basic benefit of the pilot tone squelch system is that the receiver will remain muted until it receives the pilot t...

Страница 6: ...After about 7 hours of operation with a lithium battery the battery voltage will be about 7 Volts and the LED will be nearly out FREQUENCY ADJUST These two rotary switches adjust the center frequency...

Страница 7: ...CY ROLL OFF A 18dB per octave low frequency roll off is provided in the audio section with the 3dB point adjustable from 35Hz to 150Hz The actual roll off frequency will vary somewhat according to the...

Страница 8: ...as shown in the drawing Only firm sliding pressure is needed to open and close the battery door Swing the door open and take note of the polarity marked inside showing the location of the positive and...

Страница 9: ...n The 0 LED turns on at full deviation and indicates that the input shunt compressor is operating The input limiter will handle peaks over 30dB above full modulation regardless of the gain control set...

Страница 10: ...tructions Caution Do not allow the shield wire to touch any metal part of the connector shell The shield wire is the antenna on VHF models and poor operating range will result Shield Wire Crimp Tabs R...

Страница 11: ...em sensitive to RF which can cause problems with the microphone transmitter compatibility If the electret microphone is not designed properly for use with wireless transmitters it may be necessary to...

Страница 12: ...The normal hookup for line level signals is Signal Hot to pin 5 Signal Gnd to pin 1 pin 4 jumped to pin 1 and pin 3 jumped to pin 1 This gives a 40dB attenuator that allows signal levels much higher t...

Страница 13: ...er output level set too low 2 Receiver output is disconnected cable is defective or mis wired 3 Sound system or recorder input is turned down DISTORTED SOUND 1 Transmitter gain audio level is far too...

Страница 14: ...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...

Страница 15: ...reater than 10k Input compressor Soft compressor 30 dB range Gain control range 43 dB semi log rotary control Modulation indicators Dual LEDs indicate modulation level 12 dB below limiting and at the...

Страница 16: ...c 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 L...