Lectrosonics um400a Instruction Manual
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Lectrosonics um400a Instruction Manual

Frequency synthesized 100 mw uhf belt-pack transmitter
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UM400a
Frequency Synthesized 100 mW UHF Belt-Pack Transmitter
Featuring
Digital Hybrid Wireless
U.S. Patent 7,225,235
Fill in for your records:
Serial Number:
Purchase Date:
Technology
™
INSTRUCTION MANUAL
Rio Rancho, NM, USA
www.lectrosonics.com

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Summary of Contents for Lectrosonics um400a

  • Page 1 INSTRUCTION MANUAL UM400a Frequency Synthesized 100 mW UHF Belt-Pack Transmitter Featuring Digital Hybrid Wireless Technology ™ U.S. Patent 7,225,235 Fill in for your records: Serial Number: Purchase Date: Rio Rancho, NM, USA www.lectrosonics.com...
  • Page 2 UM400a LECTROSONICS, INC.

  • Page 3: Table Of Contents

    Microphone RF Bypassing ..................................12 Line Level Signals ....................................Wiring Hookups for Different Sources ...............................13 Works with Servo Inputs Only: ................................13 Compatible with Servo Inputs and other Lectrosonics Transmitters: ....................13 Replacement Parts and Accessories ..............................14 UHF Transmitter Antenna Specifications ............................14 Troubleshooting ....................................15 Specifications and Features ................................17...

  • Page 4: General Technical Description

    General Technical Description Introduction tion via an analog FM wireless link. This proprietary The UM400a transmitter combines 100 mW of RF algorithm is not a digital implementation of an analog output with +/- 75 kHz wide deviation for extended compandor but a technique which can be accomplished operating range and extremely high signal to noise ratio.

  • Page 5: No Pre-Emphasis/De-Emphasis

    Antenna around this problem short of eliminating pre-empha- sis altogether. Neither of these problems occur in the The antenna on the UM400a consists of a rugged 1/4 hybrid system design. wavelength stranded and galvanized steel cable, de- tachable via an SMA connector. The impedance of this Pilot Tone Squelch antenna port is 50 Ohms.

  • Page 6: Controls And Functions

    NOTE: While a NiMH battery provides long operating time, it will give little or no warning The input on the UM400a accommodates virtually every when depleted. If you use a NiMH battery in the lavaliere, hand-held or shotgun microphone available.

  • Page 7: Modulation Leds

    Frequency Synthesized UHF Belt-Pack Transmitter Modulation LEDs Adjustable Low Frequency Roll-Off The Modulation LEDs provide a visual indication of the A 18dB per octave low frequency roll-off is provided in input audio signal level from the microphone. These the audio section, with the -3dB point adjustable from two bicolor LEDs can glow either red or green to indi- 35Hz to 150Hz.

  • Page 8: Battery Installation

    Selecting the Compatibility Mode cover door in the direction of the arrow as shown in the The UM400a can be used with Lectrosonics 400 Series illustration. Only firm, sliding pressure is needed to open Digital Hybrid, 200 Series analog, 100 Series analog, and close the battery door.

  • Page 9: Attaching A Microphone And Adjusting Gain

    To gain access to these switches, slide the access door Less than -20 dB sideways with a fingernail. -20 dB to -10 dB Green With Lectrosonics 400 Series receivers, a front panel LCD character display will indicate the correct transmit- -10 dB to +0 dB Green Green...

  • Page 10: 5-Pin Input Jack Wiring

    UM400a 5-Pin Input Jack Wiring The wiring diagrams included in this section represent The Audio Input Jack for the UM400a is wired as shown the basic wiring necessary for the most common types below: of microphones and other audio inputs. Some micro-...

  • Page 11: Microphone Cord Termination

    Frequency Synthesized UHF Belt-Pack Transmitter Microphone Cord Termination Caution: When wiring the connector, do not use the connector body for any electrical connections. A common mistake is to use the connector body as an audio ground. The connector body is already used as an RF ground on VHF models and no other use is permitted.

  • Page 12: Microphone Rf Bypassing

    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. Line Level Signals...

  • Page 13: Wiring Hookups For Different Sources

    Servo input. In the “Compatible with Servo Input and other Lectroson- A new “servo” input circuit is used on the UM400a and ics Transmitters” section shows a compatible wiring other models such as the SM Series where pin 4 is that will work with all 5-Pin Lectrosonics transmitters.

  • Page 14: Replacement Parts And Accessories

    Replacement wire belt clip Lectrosonics #BCWire Replacment whip antenna Lectrosonics AMM (xx) - specify frequency block (xx) UHF Transmitter Antenna Specifications All Lectrosonic UHF transmitter antennas follow the color code specifications in the chart below to identify operating frequency block range. (The frequency block range is engraved on the ouside housing for each individual transmitter.) If a situation exists whereby the antenna is defective and the antenna cap is missing, refer to the following chart to determine the correct replacement antenna.

  • Page 15: Troubleshooting

    Frequency Synthesized UHF Belt-Pack Transmitter Troubleshooting Before going through the following chart, be sure that you have a good battery in the transmitter. It is important that you follow these steps in the sequence listed. Symptom Possible Cause TRANSMITTER BATTERY LED OFF 1) Battery is inserted backwards.
  • Page 16 UM400a LECTROSONICS, INC.

  • Page 17: Specifications And Features

    Frequency Synthesized UHF Belt-Pack Transmitter Specifications and Features Operating frequencies: Block 21: 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...

  • Page 18: Service And Repair

    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.
  • Page 19 Frequency Synthesized UHF Belt-Pack Transmitter Rio Rancho, NM...

  • Page 20: Limited One Year Warranty

    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.

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