Lectrosonics UM700 Operating Instructions And Troubleshooting Manual
Digital frequency-agile uhf belt-pack transmitter
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Summary of Contents for Lectrosonics UM700
- Page 1 UM700 DIGITAL FREQUENCY-AGILE UHF BELT-PACK TRANSMITTER OPERATING INSTRUCTIONS and trouble-shooting guide LECTROSONICS, INC. Rio Rancho, NM www.lectrosonics.com...
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Page 2: Table Of Contents
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 A6U UHF ANTENNA .................. -
Page 3: Introduction
50 Ohm SMA port on the control panel. Only the UM700 transmitter is covered in this manual. Companion receivers are covered in separate manuals. The UM700 will operate with any 700 Series Lec- trosonics receiver in the same frequency block. -
Page 4: General Technical Description
30dB above full modulation. The transmitter circuits are all regulated to allow full output power from the beginning (9 Volts) to the end (5.5 Volts) of battery life. The UM700 transmitter is comprised of a number of functional sub-systems as shown in the block diagram below. UM700... - Page 5 This can create serious problems in multi-channel wireless systems when an IM signal falls on the carriers, IF frequencies, etc. of the systems being operated. To eliminate this problem in the UM700, the modulated radio signal passes through a circular isolator before entering the antenna. The circular isolator functions like a “one-way check valve”...
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Page 6: Controls And Functions
LF ROLL OFF INPUT JACK The input jack on the UM700 is a Switchcraft TA5M connector that accommodates virtually every lavalier, hand-held or shotgun microphone available, with positive or negative bias. The input will also cleanly handle line level signals up to 300 mV before limiting. - Page 7 USE ONLY THE SCREW THAT IS SUPPLIED The circuitry is tightly packed into this unit. A longer screw will permanently damage the transmitter! Use only Lectrosonics PN:28528 which is a Phillips head, 4-40 x 3/16", FL100 screw. Rio Rancho, NM – USA...
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Page 8: Battery Installation
BATTERY INSTALLATION The transmitter is powered by a standard alkaline or lithium 9 Volt 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 1.5 hours of operation, or less, and will run down quite abruptly. -
Page 9: Operating Notes
Frequency Agile UHF Belt-Pack Transmitter OPERATING NOTES The AUDIO LEVEL control knob should not be used to control the volume of your sound system or recorder levels. This gain adjustment matches the transmitter gain with the user’s voice level and microphone positioning. If the audio level is too high —... -
Page 10: 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 11: 5-Pin Input Jack Wiring
UHF Transmitter Equivalent Input Circuit VHF transmitters use the shield of the microphone cord as the antenna. The UM700 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 12 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 13: A6U Uhf Antenna
Frequency Agile UHF Belt-Pack Transmitter A6U UHF ANTENNA This is a full size cutting template. Lay the actual antenna on top of this drawing and cut at the mark for the desired frequency group. Install cap on end of antenna after cutting to length. -
Page 14: Troubleshooting
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. 2) Battery is dead. -
Page 15: Specifications And Features
Frequency Agile UHF Belt-Pack Transmitter SPECIFICATIONS AND FEATURES Operating Principle: Proprietary digital modulation with encryption Operating frequencies: 525.000 to 870.000 MHz depending upon local regulations Frequency selection: 256 frequencies in 100kHz steps RF Power output: 50 mW (nominal) Frequency stability: ±... -
Page 16: 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 17 Frequency Agile UHF Belt-Pack Transmitter This page intentionally blank. Rio Rancho, NM – USA...
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Page 18: Warranty
This warranty applies only to items returned to us, shipping costs prepaid, within one year from the date of purchase. This warranty gives you specific legal rights. You may have additional legal rights which vary from state to state. LECTROSONICS, INC. 581 LASER ROAD RIO RANCHO, NM 87124 USA www.lectrosonics.com...
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