Lectrosonics D4T 4-Channel Digital Audio Transmitter

The D4T transmitter can accept up to four inputs from digital or analog sources. The inputs can be configured as follows:

• Four balanced analog inputs using all four jacks
• Two digital channels using jack 1 and two balanced analog inputs using jacks 3 and 4
• Four digital channels using jacks 1 and 2

The input connectors are TA3 “mini XLR” types with the same pin numbering and configuration as standard XLR connectors for AES-EBU and balanced line level analog signals. Input preamp circuits use a special balanced amplifier with very high common mode rejection to minimize hum and noise. Either analog or AES/EBU digital input signals are converted to an internal 24-bit digital format which is then encoded, organized into packets, and passed to an RF modulator using spread spectrum techniques and error correction for robust reception. The modulated RF signal is filtered before and after amplification to suppress out-of-band noise and spurious signals, and a circulator/isolator guards against intermodulation interference (IM). A USB port is provided for firmware updates.

Lectrosonics D4T Transmitter Specifications:

• Power output: 200 mW
• Audio Input: Simulated transformer balanced inputs, clip level adjustable +0 to +20 dBu (or AES/EBU digital standard)
• Power requirements: 9 - 16 VDC
• Power consumption: 500 mA
• Dimensions: 4" x 4" x 1.5"
• Weight: 12 oz (339 g)