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.