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  5. Operating Instructions Manual

Lectrosonics UM195B Operating Instructions Manual

Summary of UM195B

  • Page 1

    Um195b uhf belt-pack transmitter lectrosonics, inc. Rio rancho, nm operating instructions and trouble-shooting guide.

  • Page 2: Introduction

    2 introduction thank you for selecting the lectrosonics um195b belt-pack transmitter. The um195b combines over 80 years of engineering experience with the very latest components, in a design that addresses the most demanding professional applica- tions. The design of the um195b was the direct result...

  • Page 3

    3 uhf belt-pack transmitter rio rancho, nm – usa general technical description the um195b transmitter is comprised of a number of functional sub-systems as shown in the block diagram below. The 195 system uses +/-75khz deviation. The transmitter circuits are all regulated to allow full output power ...

  • Page 4: Controls And Functions

    4 controls and functions input jack the 5-pin input jack accommodates virtually every lavalier, hand-held or shotgun microphone available. Use a switchcraft ta5f connector on the cord. See the separate sheet titled “transmitter 5-pin input jack wiring” regarding the correct connections for various m...

  • Page 5

    5 uhf belt-pack transmitter rio rancho, nm – usa modulation leds indicate the proper setting of the mic level control. Level led -- flickers or glows when sufficient audio is present. Limit led -- lights up when the input level is high enough to cause limiting. The input limiter has a very high over...

  • Page 6: Battery Installation

    6 battery installation the transmitter is powered by a 9 volt alkaline or lithium battery. It is important that you use only an alkaline or lithium battery for longest life. Standard zinc-carbon batteries marked “heavy-duty” or “long-lasting” are not ad- equate. Ni-cad rechargeable batteries will on...

  • Page 7: Operating Instructions

    7 uhf belt-pack transmitter rio rancho, nm – usa operating instructions 1) install a fresh battery according to the instructions on the previous page. 2) insert the microphone plug into the input jack, aligning the pins; be sure that the connector locks in. 3) attach the antenna to the jack on the c...

  • Page 8: Microphone Cord Termination

    8 microphone cord termination 1 2 3 4 5 view from solder side of pins 0.3" 0.15" heatshrink tubing ta5f connector assembly mic cord stripping instructions 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 opera...

  • Page 9: 5-Pin Input Jack Wiring

    9 uhf belt-pack transmitter rio rancho, nm – usa transmitter input jack 4 3 2 1 5 lectrosonics 1uh 10k 1k 5 100 4 3 2 1 330pf 330pf + 5v mic bias 5ma max to mic amp pos bias (or gnd) mic source load line in neg gnd (or bias) uhf transmitter equivalent input circuit 5-pin input jack wiring the wiring...

  • Page 10

    10 rf bypassing some mics require rf protection to keep the radio signal from affecting the capsule, even though the transmitter input circuitry is already rf bypassed (see schematic diagram). If the mic is wired as directed, and you are having difficulty with squealing, high noise, or poor frequenc...

  • Page 11: Troubleshooting

    11 uhf belt-pack transmitter rio rancho, nm – usa 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 in...

  • Page 12: Specifications And Features

    12 specifications and features operating frequencies: 470 to 608 mhz rf power output: 70 mw (nominal) frequency stability: ±0.002% deviation: ±75 khz (max) preemphasis: none spurious radiation: 50 db below carrier equivalent input noise: -126 dbv input level: nominal 2 mv to 300 mv, before limiting....

  • Page 13: Service And Repair

    13 uhf belt-pack transmitter rio rancho, nm – usa service and repair if your system malfunctions, you should attempt to correct or isolate the trouble before concluding that the equipment needs repair. Make sure you have followed the setup procedure and operating instructions. Check out the intercon...

  • Page 14: Limited One Year Warranty

    Limited one year warranty the equipment is warranted for one year from date of purchase against defects in materials or workmanship provided it was purchased from an authorized dealer. This warranty does not cover equipment which has been abused or damaged by careless handling or shipping. This warr...