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Summary of Contents for Lectrosonics H175DC
- Page 1 H175DC Plug-On Transmitter OPERATING INSTRUCTIONS and trouble-shooting guide Digital Code Squelch LECTROSONICS, INC. Rio Rancho, NM...
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Page 3: Table Of Contents
This system represents well over 20 years of manufacturing experience in wireless microphones, and almost 70 years of design experience. It is the best value avail- able today. You will find that the H175DC radiates more power than other standard handheld wireless microphones. This provides both greater operational range, as well as improved signal-to-noise ratio. -
Page 4: General Description
GENERAL DESCRIPTION The H175DC is a “plug-on” transmitter that converts any microphone with an XLR connector to wireless operation. The transmitter is comprised of four major functional subsystems: the mic preamp/gain control, the compandor, the compressor/limiter and the RF transmitter (see block diagram below). -
Page 5: Controls And Functions
CONTROLS AND FUNCTIONS The H175DC may be used with a wide variety of microphones. The 3-pin XLR type connector on the H175DC allows the transmitter to be used with any dynamic microphone, as well as many two wire positive bias lavalier systems (such as those systems supplied by Lectrosonics.) -
Page 6: Operating Instructions
OPERATING INSTRUCTIONS 1) Install the Microphone onto the transmitter. a. Unscrew the collar by turning it fully clockwise until it stops. Locking tab fully retracted b. Turn the collar two turns counter-clockwise to extend the locking tab Knurled knob turned completely clockwise. - Page 7 Plug-On Transmitter 2) Turn on the receiver and adjust the output level to minimum. 3) Turn on the transmitter. The CODE LED on the receiver should come on. 4) Hold the microphone as you will when you will be using it. 5) Speak as loudly as you expect to speak in normal system use.
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Page 8: Battery Replacement
BATTERY REPLACEMENT The H175DC transmitter is powered by a standard alkaline 9 Volt battery. It is important that you use ONLY an ALKA- LINE battery for longest life. Standard zinc-carbon batteries marked “heavy duty” or “long-lasting” are not adequate. They will provide only about 4 hours of operation. Similarly, nicad rechargeable batteries only give 4 hours of opera- tion, and will also run down quite abruptly. -
Page 9: Troubleshooting
Plug-On 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) Unit turned off. Check front panel on/off slide switch. 2) Battery is inserted backwards. -
Page 10: Specifications And Features
SPECIFICATIONS AND FEATURES Operating frequencies: 169 to 172 MHz; 174 to 186 MHz RF Power output: 50mW Deviation: ±15kHz Spurious radiation: 55dB below carrier Equivalent input noise: -121dBV Input Types: 200 Ohm dynamic 5V phantom power 1k Ohm, 2-wire electret with 5 VDC positive bias Level: Nominal 2mV to 300mV (before compression) Impedance:... -
Page 11: 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 12: 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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