purchase of equipments for communication systems lab for ece department - 2 mixed signal oscilloscope nsignal bandwidth: 100 mhz, channel sampling rate: max. 1 ghz / s, record length 14 mpts, 16 channels with built-in 25 mhz n arbitrary function generator & fft analyzer, time base range: 2ns – 50 s / div ( 1-2-5 sequences ) , waveform capture rate up to 60, 000 wfs / s, 8.0”tft lcd ( 800 x 480 ) , trigger type: edge, slope, pulse, video, window, interval, dropout, runt, serial trigger, advanced math operations ( fft, d / dt, integrate, square root ) , high speed p / f function, 36 parameters of automatic measurements, built-in full bandwidth hardware frequency counter, standard interface, usb host usb device: support ( usb tmc, pitch bridge ) , n 3 pulse code modulation and demodulation trainer kit ndc signal: variable 0-5v, analog signal: on board sine wave frequency of 1 khz-5 khz and 0-4v amplitude, pcm modulator: using a / d conversion ic, pcm demodulator: using d / a conversion and lpf, 8-level led indication for both modulation and demodulation, on board 3.5mm audio jack is provided for both microphone and speaker, on board codec ic provided for pcm generation and detection, audio signal: on board 20hz-20 khz audio signal generator, power supply: +12v, -12v and +5v with 1000ma regulated dc supply with on board led indication, patch chords: 2mm banana socket, various test points are provided on board. n 4 time division multiplexing and demultiplexing trainer kit ( tdm ) trainer kit ninput sine waves: 2khz, 1khz, 500hz, 250 hz, synchronization pulse generation: using ( variable 0-5v ) dc level, generation of receiver clock and channel information using pll, communication through three, two and single wire modes, sampling rate: 32 khz, reconstruction: 4th order low pass butterworth filter cut-off freq: 3.4 khz, clock recovery & sync detect- 2 of the fundamental aspects using pll techniques n 5 delta modulation and demodulation trainer kit non board analog signal of 250hz, variable amplitude ( 0-5vpp ) , on board clock signal of 10khz, delta modulation using comparator and nand gate, up down counter 74193, staircase waveform using dac 0800, demodulation using rc filter. n