Directorate Of Technical Education

Directorate Of Technical Education has published Tender For Purchase Of Lab Equipments , Purchase Of Lab Equipments , Ask Modulation And Demodulation Kit Specifications: • Message Signal1: 8-Bit Variable Data,Amplitude 5V. • Message Signal 2: Debounced Data, Amplitude Low (0) And High (5 V). • Message Signal 3: Fixed Data 25 Khz, 12.5 Khz, 6.25 Khz, 3.12 Khz, Amplitude 5 V. • Carrier Signal: Sine Wave, Frequency 200 Khz, Amplitude 5 V. • Modulator Type: Switching Modulator Using Analog Switch / Transistor Switching Ic. • Demodulator: Envelope Detector And Lpf. • Comparator: Lm311 Based. • Supply Voltage (Board): +12 V, +5 V Dc. • Supply Current: 100 Ma Minimum. • Input Voltage: 230 V Ac, 50 Hz. • Interface Connectors: 2 Mm Banana Socket. , Fiber Optic Communication Trainer Kit Specifications: Power Supply: • 230 V Ac ±10%, 50 Hz Mains Operation. • Built-In Regulated Power Supply. Optical Transmitters: • Led Transmitter: 660 Nm. Optical Receivers: • Phototransistor / Pin Photodiode Receiver. • Built-In Signal Conditioning And Amplifier Circuits. • Audio Power Amplifier With Speaker/Headphone Output. • Comparator / Pulse Shaping Circuit For Digital Signal Recovery. • Test Points For Cro Observation And Signal Monitoring. Fiber Media: • Multimode Plastic Optical Fiber (Pof). • Fiber Patch Cords With Connectors. Signal Sources: • Built-In Sine Wave Generator. • Built-In Square Wave / Digital Pulse Generator. • Voice Signal Input Through Built-In Microphone/Audio Source. Trainer Features: • Separate Transmitter And Receiver Sections. • On-Board Test Points For Signal Observation. • Led Indicators For Signal Monitoring. • Fault Simulation Facility. • Compact Tabletop Modular Design. • Circuit Diagram Printed On Pcb. Bandwidth: • Analog Bandwidth: Up To 350 Khz. • Digital Bandwidth: Up To 2.5 Mhz. Controls: • Variable Signal Amplitude Control. • Variable Frequency Control. • Optical Intensity Adjustment. Standard Accessories: • Patch Cords And Connectors. • Power Cord. • Audio Connecting Cable. • User Manual.. Last date of submission for this tender is 2026-07-30. This is a Laboratory Equipment tender in Pudukkottai, Tamil Nadu