T5 MULTI-FREQUENCY IFB TRANSMITTER EURO MODEL OPERATING INSTRUCTIONS and trouble-shooting guide LECTROSONICS, INC. www.lectrosonics.
INTRODUCTION Thank you for selecting the Lectrosonics frequency agile, narrowband, T5 IFB transmitter. The T5 is the result of over 80 years of engineering experience with the very latest components, in a design that addresses the most demanding profes sional applications. The Lectrosonics T5 IFB Transmitter along with the companion R5 IFB Receiver allow on-air talent to monitor program audio and receive cues from video directors and other production personnel.
IFB Transmitter GENERAL TECHNICAL DESCRIPTION The T5 IFB Transmitter is comprised of a number of functional sub-systems as shown in the block diagram below. GENERAL The T5 is designed to operate with the Lectrosonics R5 IFB Receiver and features microprocessor control of 256 frequencies of operation within any one of at least thirteen frequency bands. (See page 10.) The T5 uses 20kHz deviation for an efficient use of bandwidth.
GENERAL TECHNICAL DESCRIPTION COMPANDOR NOISE REDUCTION The single band compandor is a high quality audio device that processes the input signal such that the large dy namic ranges of input signal can be transmitted to the receiver without overload or noise. A complementary system in the receiver recovers the original dynamics of the signal for full audio quality. Compression and expansion ratios are complementary at 2:1.
IFB Transmitter FRONT PANEL CONTROLS AND FUNCTIONS OFF/TUNE/XMIT Switch OFF - The unit is powered off. TUNE - Enables the up and down frequency buttons and inhibits the transmitter section. XMIT - Normal operation. In this position of the switch the unit is transmitting a modulated signal to the corre sponding receiver and the FREQ buttons are locked out. FREQ IFB TRANSMITTER -20 OFF TUNE XMIT POWERUP SEQUENCE When the unit is switched on (to TUNE or XMIT), the display cycles to: 1.
REAR PANEL CONTROLS AND FUNCTIONS 1 2 3 12V DC 4 CC MIC LINE RTS1 RTS2 IFB Transmitter CH 20 M O D E ANTENNA T5 Rear Panel XLR JACK Standard XLR female jack will accept a variety of input sources depending on the MODE switches. The pin functions can be changed to suit the source depending on the** positions of the MODE switches. For detailed information on the MODE switches see the INSTALLATION AND OPERATION section.
IFB Transmitter INSTALLATION AND OPERATION 1) Pin 1 of the XLR input jack is normally tied directly to ground inside the unit. If a floating connection is desired, move the ground lift jumper inside the unit. (See next page for the location of the ground lift jumper.) 2) Set the MODE switches on the rear panel to match the specific input source to be used. (See next page for details on setting the MODE switches.) 3) Insert the power supply plug into the 12VDC jack on the rear panel.
MODE SWITCHES AND GROUND LIFT JUMPER MODE Switches The MODE switches allow the T5 to accommodate a variety of input sources by changing the input sensitivity and the pin functions of the input XLR jack. Marked on the rear panel are the most common settings. Each setting is detailed below. Switches 1 and 2 adjust the XLR pin functions while switches 3 and 4 adjust the input sensitivity.
IFB Transmitter TROUBLESHOOTING SYMPTOM POSSIBLE CAUSE DISPLAY NOT LIT OR BLINKING ON AND OFF • External power supply disconnected or inadequate. • The External DC power input is protected by an auto-reset polyfuse. Disconnect power and wait about 10 seconds for the fuse to reset. NO TRANSMITTER MODULATION LEDs • AUDIO LEVEL turned all the way down. • Mic capsule is damaged or malfunctioning. • Mic cable damaged or mis-wired. NO RECEIVED SIGNAL • Transmitter not turned on.
FREQUENCY BLOCKS AND RANGES The table below lists the factory designated frequency ranges available for the T5 IFB Transmitter. The first two digits left of the decimal are the block number. In this case, 685.500 MHz falls within block 26. Each T5 transmitter is built to cover a pre-selected range of frequencies (a “block”) as shown below. The transmit ter will tune to any of 256 different frequencies within this factory assigned block.
IFB Transmitter SPECIFICATIONS AND FEATURES Operating Frequencies: Frequencies (Channels per block): Channel Spacing: 525.0 MHz to 862.0 MHz (See page 10.) 256 100 kHz Standard (Programmable for 25 kHz spacing.) Spurious & Harmonic Suppression: Frequency Stability: Temperature Stability: 40 dB below carrier at freq. above 1 GHz 70 dB below carrier at freq. below 1 GHz ±.002% (20 ppm) @ 25° C ±.
LIMITEDONE ONE YEAR WARRANTY LIMITED 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 warranty does not apply to used or demonstrator equipment. Should any defect develop, Lectrosonics, Inc.