tender for tdm, am and sampling trainer kits for communication lab. -1 tdm n ( time division nmultiplexing pam nmodulation ndemodulation ) ntrainer kits n• crystal frequency: 5 mhz and more n• analog inputs : 4 channels n• multiplexing: tdm, n• modulation : pam n• signal generator: 250hz, 500 hz, 1 khz, 2 khz ( sine wave synchronized to sampling pulse ) adjustable amplitude and separate dc level. n• sampling rate : 16 khz / channel n• sampling pulse: with duty cycle 50 %. clock regeneration at receiver: using pll ( lpf ) n• cut-off frequency: 2-4 khz n• test points : 16, n• interconnections : 4mm sockets n• power : 230v, 50hz n• accessories: manual set of patch cords, cord n 2 am modul -ator & ndemodulator ntrainer kit nmodulating signal frequency: ( 300hz-3 khz ) nmodulating signal amplitude: ( 0-5 ) v ncarrier signal frequency : 10 khz - 50 khz ncarrier signal amplitude : ( 0-15 ) v n 3 fm nmodulator and ndemodulator ntrainer kit nsine wave generator: frequency - 100hz to 1.2 khz with amplitude adjustable, ( 0-5v ) nfm modulator : direct fm ncarrier frequency : 20 khz ( low ) , 367 khz ( high ) , fm demodulator : pll detector, quadrature detector, foster seelay discriminator, nratio detector is provided. naudio power amplifier: gain 100 nmic pre amplifier : gain 20. n