Related Manuals for Lectrosonics UM190B
Summary of Contents for Lectrosonics UM190B
- Page 1 UM190B UHF BELT-PACK TRANSMITTER OPERATING INSTRUCTIONS and trouble-shooting guide LECTROSONICS, INC. Rio Rancho, NM...
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Page 2: Table Of Contents
80 years of engineering experience with the very latest components, in a design that addresses the most demanding professional applications. The design of the UM190B was the direct result of numerous conversations with users and dealers across the US. -
Page 3: General Technical Description
At UHF frequencies, where wavelengths and antennas are shorter than VHF, a resonant dangling wire is preferred. The antenna on the UHF version of the UM190B consists of a flexible ¼ wavelength wire, detachable via an SMA connector. The impedance of this connector is 50 Ohms at UHF frequencies. -
Page 4: Controls And Functions
ANTENNA INPUT JACK The input on the UM190B 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 microphones, and other sources. - Page 5 Used to adjust the audio input level for the proper modulation. ANTENNA JACK The flexible wire antenna supplied with the UM190B UHF transmitter is cut to 1/4 wavelength. It is removable via an SMA connector. The 50 Ohm RF port can also be connected directly to test equipment.
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Page 6: Battery Installation
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 adequate. Ni-cad rechargeable batteries will only provide 2 hours of operation, or less, and will run down quite abruptly. -
Page 7: Operating Instructions
UHF Belt-Pack Transmitter 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 control panel of the unit. Be sure it is screwed in firmly. 3) Turn the power switch to the “ON.”... -
Page 8: Microphone Cord Termination
MICROPHONE CORD TERMINATION TA5F Connector Assembly VIEW FROM SOLDER SIDE OF PINS 0.15" Heatshrink Tubing 0.3" 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 operating range will result. -
Page 9: Um190B Input Jack Wiring
UHF Transmitter Equivalent Input Circuit VHF transmitters use the shield of the microphone cord as the antenna. The UM190B uses a 1/4 wave flexible wire to radiate the RF signal. There is really not much difference between these two approaches, with respect to the effect of the RF on the microphone capsule. - Page 10 Leaded capacitors: P/N 15117 Leadless capacitors: P/N SCC330P All Lectrosonics lavalier mics are already bypassed and do not need any additional capacitors installed for proper operation. BODY GROUND 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.
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Page 11: Troubleshooting
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 12: Specifications And Features
Battery Life: 7.5 Hours with alkaline 9 Volt Weight: 6.3 ozs. including battery Dimensions: 3.1 x 2.4 x .75 inches Emission Designator: 35KF3E Specifications subject to change without notice. The UM190B transmitter is FCC type accepted under Part 74: 470-608 MHz... -
Page 13: 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 14: 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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