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UH400A

UH400TM

Frequency Agile Plug-On UHF Transmitter

Featuring Digital Hybrid Wireless™ Technology

U.S. Patent 7,225,135

INSTRUCTION MANUAL

Rio Rancho, NM, USA

www.lectrosonics.com

Fill in for your records:

Serial Number:

Purchase Date:

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Содержание UH400A

Страница 1: ...Frequency Agile Plug On UHF Transmitter Featuring Digital Hybrid Wireless Technology U S Patent 7 225 135 INSTRUCTION MANUAL Rio Rancho NM USA www lectrosonics com Fill in for your records Serial Number Purchase Date ...

Страница 2: ...m power for use with a wide variety of microphones LEDs located on the top panel make quick and accurate level settings without having to view the receiver The battery compartment accepts any 9 volt alkaline LiPolymer or lithium battery and makes a positive connection via self adjusting contacts The UH400TM is a specialized version of the UH400A that is an integral part of a highly accurate wirele...

Страница 3: ...antom Power Voltage Select Switch 6 Frequency Select Switches 7 Input Jack 7 Modulation LEDs 7 Input Signal Level 7 Input Gain Adjustment 7 Compatibility Mode Indicators 8 Frequency Blocks and Ranges 9 Operating Instructions 10 Attaching the Microphone 10 Selecting the Compatibility Mode 10 Adjusting the Transmitter Frequency 11 Battery Replacement 11 Using the Polarity Reversing Barrel Adapter 12...

Страница 4: ...and decoding it in the receiver yet still sending the encoded information via an analog FM wireless link This proprietary algorithm is not a digital implementa tion of an analog compandor but a technique which can be accomplished only in the digital domain even though the inputs and outputs are analog signals Channel noise still has an impact on received signal quality and will eventually overwhel...

Страница 5: ...cy response of the original audio signal will be altered Pre emphasis can also cause distortion in the receiver As this signal is passed through the IF filters in the receiver distortion can be produced most noticeably at full modulation De emphasis cannot be applied until the signal is converted into audio so there is no way around this problem short of eliminating pre emphasis altogether Neither...

Страница 6: ...n power is applied replace the battery Phantom Power Voltage Select Switch Note The UH400TM can be used with the Earthworks M30 Test Microphone if pins 2 and 3 are reversed A barrel adapter is provided for this purpose This switch selects from three phantom voltages when the PWR switch is in the mid position The voltages are 5 Volts for lavaliere microphones 15 Volts for some professional mics req...

Страница 7: ...ectly reduced to 5 Volts If you have an older lavaliere mic that was wired directly to an XLR for use with the earlier UH200 s we strongly recommend building our protec tion circuit into the XLR to prevent accidental destruc tion of the lavaliere Frequency Select Switches Two 16 position rotary switches adjust the operating frequency and are also used for setting Compatibility Modes The 1 6 MHz is...

Страница 8: ...0 dB LEVEL LEDs blinking together to indicate the operating mode The 20 and 10 LEDs will blink Once for 100 Series mode Twice for 200 Series mode Three times for mode 3 Contact Factory for Details Four times for 400 Series mode Native Hybrid mode Five times for IFB Series mode Six times for mode 6 Contact Factory for Details 10 dB LEVEL 20 dB LEVEL ...

Страница 9: ...able For example suppose you need to know which block covers 685 500 MHz without using the table 685 500 divided by 25 6 26 77734375 The first two digits left of the decimal are the block num ber In this case 685 500 MHz falls within block 26 Part of block 23 is not used since it covers a 608 to 614 MHz band that is illegal for use with wireless micro phones Frequency Blocks and Ranges Operating F...

Страница 10: ...s condition may reduce the dynamic range of the audio signal with compression being audible in severe cases If the audio level is too low neither LED will glow or only the 20 LED will glow green This condition may cause hiss and noise in the audio 6 Once the gain has been adjusted leave the gain control where it is and adjust the receiver output level to match the recorder or sound system Differen...

Страница 11: ...d heavy duty or long lasting are not adequate They will provide only about five minutes of operation Similarly ni cad rechargeable batteries only give one hour of operation and will also run down quite abruptly Alkaline batteries provide about 4 5 hours of operation while lithium batteries will run the unit for about 12 hours To open the battery compartment press upward on the cover door in the di...

Страница 12: ...ional TA5 to XLR adapter for connecting a lavaliere microphone to the UH400 Using the Polarity Reversing Barrel Adapter The UH400TM transmitter comes with a polar ity reversing XLR barrel adapter for use with Earthworks M30 measurement micro phones Simply connect the adapter between the transmitter and microphone Earthworks M30 Barrel Adapter UH400TM ...

Страница 13: ...mitter gain audio level set too low 2 Faulty microphone 3 Phantom power not enabled for mic that requires it 4 Not enough current to power microphone Earthworks M30 is only known microphone we ve found to exhibit this issue Distorted Sound 1 Transmitter gain audio level is far too high Check mod level lamps on transmitter and receiver as it is being used Refer to the Operating Instructions section...

Страница 14: ...ilter cannot be disabled Signal to Noise Ratio dB Note The dual envelope soft limiter provides exceptionally good handling of transients using variable attack and release time constants Once activated the limiter compresses 30 dB of transmitter input range into 4 5 dB of receiver output range thus reducing the measured figure f or SNR without limiting by 4 5 dB Total Harmonic Distortion 0 2 typica...

Страница 15: ...o 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 For timely service please 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...

Страница 16: ...rosonics 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 brea...

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