Frequency Division Multiplexing ( FDM) is based on the idea that a number of signals can share the bandwidth of a common communication channel. The multiple signals to be transmitted over this channel are each used to modulate a separate carrier. Each carrier is on a different frequency. The modulated carriers are then added together to form a single complex signal that is transmitted over the single channel.
The FDM Telemetry system consists of :
- Thermocouple Trainer :
The single board trainer with steel case and integral power supply helps to study the characteristics of the Thermocouple.
- The trainer consists of the following specifications :
- Transducer : Thermocouple ( K-type ).
- Temperature bath : Temperature control bath.
- Temperature range : Ambient temperature to 400 degree centigrade.
- Output : Measured by Digital meter.
- Temperature indicator : Digital 3 ½ digit.
- Semiconductor Temperature Sensor Trainer :
The trainer helps to study Temperature vs. current characteristics of a semiconductor temperature sensor.
- The trainer contains :
- Oven.
- Temperature controller.
- Temperature indicator.
- IC regulated power supply.
- Provision for zero and span adjustment.
- Digital meter.
- Temperature sensor AD590.
- Frequency Division Multiplexing Trainer :
The single board trainer helps to study Frequency Division Multiplexing for two channels. The trainer contains IC regulated power supply, two VCO modules and adder circuit.
Input : (i) Signal conditioner output of the Thermocouple
(ii) Signal conditioner output of the Semiconductor temperature sensor.
- Frequency Division Demultiplexer Trainer :
The single board trainer helps to study Frequency Division Demultiplexing and signal recovers from two channels Frequency Division Multiplexing trainer. The trainer contains I.C regulated power supply, BPFs and amplifiers.