PROMAX EF-970-E
Fiber Optic Communications Training System
The PROMAX EF-970-E Fiber Optic Communications Training System is designed for learning, demonstrating, and experimenting with the Fiber Optics communication systems, phenomenon related to light, and principles of transmission through Fiber Optics. Modern systems such as LASER or WDM can be studied as well.
- Emitter Kit: 2 independent channels with LED and laser-photoemitters, 8 inputs, BF generator, milliammeter
- Receiver Kit: Calibrated optic power meter
- Emitter module:
- For simultaneous transmission of two independent channels of up to 10 MHz
- Inputs: Analog (separate DC and AC); functions generator (internal); microphone; digital (with possibility of inversion)
- Emitter stage: Channel 1; Channel 2, with actionable laser feedback
- Amperemeter: For adjusting photoemitter polarization current
- Photo-emitters: 526 nm Led, 590 nm Led, 660 nm Led, 850 nm Led, 650 nm Laser
- Fault simulator
- Receiver Module:
- Photo-detectors: 1mm Si PIN; 2.5 mm Si PIN
- Precision measurements channels: 1 kHz, to prevent influence from external optical sources; very low DC noise, for very precise measurements
- Receptor stages (with variable inverse polarization): Analog channel; digital channel
- Optical power meter (dBm and mW) with absolute and relative measurements
- Outputs: Analog (high or low impedance); digital (TTL or RS-232); speaker (internal) and headphones; fault simulator
- Fault simulator
- Partial list of exercises:
- Optical power measurement
- Measuring attenuation of an optical fibre (insertion losses method)
- Measuring attenuation of an optical fibre
- Spectral dependence of attenuation of optical fibre
- Influence of ambient light
- Connecting optical fibre using ST-ST adapters
- Measuring repeatability
- Measuring P/I characteristics of photo-emitters
- Measuring optical stability of photo-emitters
- Measuring V/I characteristics of photo-emitters
- Frequency characteristics of photo-emitter modulation
- Spectral dependence of photo-detectors
- Inverse voltage in photo-detectors
- Bandwidth of photo-detectors
- Transmission of analog signals
- Transmission of audio signals
- Transmission of video signals
- Transmission of digital signals
- RS-232 transmission by optical fibers
The PROMAX EF970E Fiber Optic Communications Training System is an innovative system designed for training, demonstration and experimentation with the Fibre Optics communication systems, the phenomenon related to light and the principles of transmission through Optical Fibres; as well as the latest tendencies like LASER and WDM (wavelength multiplexing).
Emitter Kit: 8 Inputs
The instrument possesses eight selectionable inputs. The input signal may be selected, either channel 1 (CH 1) or channel 2 (CH 2), the same input may also be used for both channels.
1 - LF generator: sinusoidal, triangular or square (internal) signal
2 - DC analog input (75 Ohm) (external)
3 - AC analog input (75 Ohm) (external)
4 - Microphone (monophonic) (external)
5 - Digital input (External)
6 - Inverted digital input (External)
7 - Digital input permanently on "1" (internal)
8 - Digital switch "1" / "0", using the TL1 key (internal)
Channels 1 and 2
The emitter kit consists of 2 independent channels (channel 1 and channel 2) that enable signals to be transmitted from any optical input and control the amplification of the input signal level. Includes channel overload or saturation indicator.
LF Generator (Square, Triangular, Sinusoidal)
The LF generator possesses four control buttons to select the wave form (square, triangular or sinusoidal) and the frequency.
Milliammeter
The emitter kit consists of a digital milliammeter showing the polarisation current flowing through the chosen photoemitter. The channel to be measured is selected with the "A METER CH1/CH2" button.
Optical Outputs
The emitter kit has six cyclically selectable photo-emitters. Two photo-emitters may be activated at the same time for the WDM application. The photo-emitters have a protection circuit to limit optical power.
Laser Feedback
The nature of the LASER means that its optical power may be influenced by external factors such as temperature, ageing, etc. The feedback circuit is able to maintain a stable and unalterable optical power no matter what the external conditions are. The system can operate with the feedback circuit ON or OFF so to test its efficiency and the problems caused by its disconnection and/or malfunction.
Receiver
The receiver kit principally consists of two independent blocks (except for the input circuits: photo-detectors and switches), one for the signal and the other for measuring. The signal block contains two channels, also independent, one for receiving analog signals and the other for digital signals. The measuring block contains the power meter, enabling operation in four different modes: analog, digital, 1 kHz and DC.
Optical Inputs
The receiver has four incorporated photo-detectors and an external photo-detector (optional) that connects to the "EXT. SENSOR" input by a coaxial cable (optional).
Analog Channel Signal Block
The analog channel has a gain of 40 dB, using two 20 dB amplifier stages. The signal block possesses a switch to select the type of coupling, DC or AC, applied to the first amplifier input and to the analog channel output section. The audio section consists of an independently-adjustable low-pass for regulating the level of the signal applied to the internal speaker or headphones.
Digital Channel Signal Block
The signal entering the digital channel follows a series of filtering and amplification processes for subsequent comparison with a reference level. The amplitude of the channel output may be selected as either TTL level or RS-232 level.
Optical Power Meter
This block performs the absolute or relative measurement of the received optical power. The optical meter possesses four measuring modes, selected by the user:
1 - ANALOG (monitoring mode)
3 - 1 kHz (precision mode, for measuring the 1 kHz component)
4 - DC (precision mode)
The resolution of the power meter in the monitoring modes is 0.1 dB, and 0.01 dB in the precision modes.
Brand | PROMAX |
---|---|
Condition | NEW |
Vendor Alias | EF-970-E |
- 3 - ST Adapters for Photodetectors
- 1 - Cleaning Elements for Optical Components
- 3 - 1 m Pieces of Optical Fiber
- 1 - 1 m Piece of Optical Fiber without Protective Covering
- 1 - 50 m Optical Fiber
- 2 - ST-ST Adapters
- 1 - Magnifying Lens
- 1 - Microphone
- 1 - Headphones
- 1 - Photo-Emitter 1300 nm Led
- 1 - 1 mm InGaAs PIN Photo-Detector
- 1 - 0.1 mm Ge APD (Variable Internal Gain Photo-Detector)