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Summary of Contents for Lectronics UH400TM
- Page 1 INSTRUCTION MANUAL UH400A UH400TM Frequency Agile Plug-On UHF Transmitter Featuring Digital Hybrid Wireless™ Technology U.S. Patent 7,225,135 Fill in for your records: Serial Number: Purchase Date: Rio Rancho, NM, USA www.lectrosonics.com...
- Page 2 UH400A/UH400TM Thank you for purchasing the UH400A plug-on transmit- The UH400TM is a specialized version of the UH400A ter. This is the latest version of a long history of plug-on that is an integral part of a highly accurate wireless test transmitter models that began in the late 1980’s, serv-...
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Page 3: Table Of Contents
Frequency Agile Plug-On UHF Transmitter Table of Contents General Technical Description ................................4 Introduction ......................................4 Digital Hybrid Technology ..................................4 Input Limiter ......................................5 No Pre-Emphasis/De-Emphasis ................................5 Pilot Tone Squelch ....................................5 Long Battery Life ....................................5 Frequency Agility....................................5 Controls and Functions ..................................6 Power Switch ......................................6 Power ON/OFF LED .....................................6 Phantom Power Voltage Select Switch ..............................6 Frequency Select Switches ...................................7... -
Page 4: General Technical Description
UH400A/UH400TM General Technical Description <-- (See Input Jack under Controls and Functions for details.) UH400A Block Diagram Introduction Digital Hybrid Wireless is a wideband design with ™ This proprietary algorithm is not a digital implementa- ±75 kHz deviation produding an excellent audio signal tion of an analog compandor but a technique which to noise ratio and wide dynamic range. -
Page 5: Input Limiter
Frequency Agile Plug-On UHF Transmitter Wide-Band Deviation Input Limiter A ±75 kHz deviation improves the capture ratio, signal The Digital Hybrid Wireless transmitters employ a ™ to noise ratio and AM rejection of a wireless system digitally-controlled analog audio limiter just before the dramatically, compared to the more commonly used ±... -
Page 6: Controls And Functions
Lectrosonics). Phantom Power Voltage Select Switch Power Switch Note: The UH400TM can be used with the Earthworks M30 Test Microphone if pins 2 and 3 The three position switch turns the unit on or off, and are reversed. -
Page 7: Frequency Select Switches
Frequency Agile Plug-On UHF Transmitter The transmitter can supply 4 mA at 42 Volts, 8 mA at 15 The 1.6 MHz is a coarse adjustment and the 100 kHz is Volts, and 8 mA at 5 Volts. The 42 Volts setting actually the fine adjustment. -
Page 8: Compatibility Mode Indicators
UH400A/UH400TM Compatibility Mode Indicators At power up, all three LEDS will blink together red, then green, followed by the -20 and -10 dB LEVEL LEDs blinking together to indicate the operating mode. The –20 and –10 LEDs will blink: • Once for 100 Series mode •... -
Page 9: Frequency Blocks And Ranges
Frequency Agile Plug-On UHF Transmitter Frequency Blocks and Ranges The UH400A transmitter will tune to any of 256 different Operating Frequencies (MHz): frequencies within a factory assigned block. Block 21 537.600 - 563.100 Block 22 563.200 - 588.700 Block 23 588.8 00- 607.900;... -
Page 10: Operating Instructions
UH400A/UH400TM Operating Instructions TO ATTACH TO REMOVE Hold the transmitter case with the microphone Press firmly, listen for click. pointed Depress collar fully. upward. Click! Rotate the collar in the direction shown. Pull on mic to ensure it is locked. -
Page 11: Adjusting The Transmitter Frequency
Frequency Agile Plug-On UHF Transmitter Battery Replacement 4. Set the Power Switch to NO PHTM briefly – just a couple of seconds for the front panel LED’s to light The UH400A transmitter is powered by a standard up, then turn the unit off. 9 volt battery. -
Page 12: Using The Polarity-Reversing Barrel Adapter
Using the Polarity- Accessories Reversing Barrel Adapter PHTRAN2 Cordura Pouch with belt clip and velcro flap. The UH400TM transmitter comes with a polar- (Included with TX) ity-reversing XLR barrel adapter for use with Earthworks M30 measurement micro- MC5AX (optional) phones. Simply connect the adapter... -
Page 13: Troubleshooting
Frequency Agile Plug-On UHF 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. -
Page 14: Specifications And Features
UH400A/UH400TM Specifications and Features Operating frequencies: 537.600 to 607.900 MHz; 614.100 to 767.900 MHz Frequency selection: 256 frequencies in 100 kHz steps RF Power output: 100 mW Pilot tone: 25 to 32 kHz; 5 kHz deviation (in 400 Series (hybrid) mode) Frequency stability: ± 0.002% Deviation: ± 75 kHz max. (in 400 Series mode) Spurious radiation: 60 dB below carrier Equivalent input noise: –118 dBV, A-weighted Input level: Nominal 2 mV to 300 mV, before limiting; Greater than 1.0 V maximum, with limiting. Input impedance: 1 k Ohm Phantom power: Selectable; 5, 15, 48 VD (see details in Controls and Functions section) Input limiter: Soft limiter, >30 dB range... -
Page 15: Service And Repair
Frequency Agile Plug-On UHF Transmitter 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 the interconnect- ing cables and then go through the Troubleshooting section in this manual. -
Page 16: 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.
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