Terahertz Technologies Inc.Terahertz Technologies Inc.
(888) U.S.-OTDRS
LTX-7215 Bi-Directional Analog/Digital Fiber Optic Link

The LTX-7215 “Signal Transporter” Transceivers one analog and four independent channels of digital information over a fiber optic link to over 10 kilometers with Singlemode fiber. Analog signal bandwidth is DC to 25 MHz and signals are digitized to 12 bit precision. Digital signals are transmitted 0 to 50 Mb/s per channel. Digital channels are Sampled up to 100 million times a second. The signals are then multiplexed and transmitted serially over an optical fiber at up to 2 gigabits per second. The far end of the fiber link demultiplexes the signal back into independent outputs. Each of these channels maybe be toggled at rates up to 50 Mb/s.

Using the LTX-7215 in conjunction with a LTX-7225, the result is a remote fiber-coupled 12-bit data acquisition system, digitizing the signal at 50 Mb/s and reconstructing the signal by means of a fast D/A converter. The units may also be employed in the reverse direction if desired.

Applications include data acquisition for plasma physics experiments, signal transmission and control of equipment at high voltage potentials, operations through Faraday shields, and precise noise-free signal transmission in hostile EMI environments.

Single Fiber Transceivers
DC-25MHz Analog
Four Independent Digital Channels
0 to 50 Mb/s Per Digital Channel
+/-5V or +/-1V Full Scale I/O
Digital LVTTL, CMOS/TTL Input
Analog I/O - 12 bit Precision
AC/DC Operation
Ordering Information
LTX-7215-1310  Singlemode, 2.0 Gb/s Analog/Digital Signal Transporter
Laser Wavelength 1310 nm +/- 20 nm
Optical Transmission Rate 2.0 Gb/S
Loss Budget 7 dB
Laser Safety Classification Class I Safety per FDA/CDRH and IEC-825-1 Regulations
Typical Transmission Distances 10 km with 9/125μm (SM) Fiber
Fiber Optic Connectors ST Standard, FC Available upon Request
Analog Connector BNC
Digital Connector Cable and Breakout Board Supplied
LED Annunciators Provided Input Overload, Optical Signal and Power
Power Supplies Wall Mount, Universal, US, UK, Continental Europe and Australian Plugs Included
Power Requirements 95 - 260 VAC, 50 - 60 Hz, 16 VA Max.
Batteries/Hours of Operation 6 AA NiMH / 3 Hours
Operating Temperature Range 0° to 40°C
Dimensions   214 L x 114 W x 59 H (mm)
Weight 0.578 Kg
Standard Warranty

Two Years, Components and Workmanship

30 Day Satisfaction Guarantee


Analog Channel Specifications
Number of Analog Channels 1
Analog Signal Bandwidth DC to 25MHz (-3 dB)
Resolution 12 Bits
Input Voltage Ranges +/- 1 V or +/- 5 V
Transfer Accuracy +/- 10 mV offset, +/- 0.1% Full Scale (100Hz Sine Wave 8v pk-pk)
Output Impedance 50 Ohms
Output Drive Capability +/- 5 V open circuit, +/- 2 V into 50 Ohm Load
Input Impedance 50 Ohms or 1 Megohm || 20 pF, (Selectable)
A/D Sampling Rate 100 Mega Samples p/s



Digital Channel Specifications
Number of Digital Channels  4
Digital Inputs TTL, LVTTL, CMOS Compatible
Digital Outputs LVTTL (0 - 3.3 V)
Signal Latency Approximately 300 ns (with One Meter of Fiber)
Digital Channel Switching Rate 0 - 50 Mb/s
Digital Signal Edge Uncertainty 0 - 10 ns

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