Processor based linked compressor-expander telecommunications sy
Processor modem
Programmable automatic cable equalizer
Programmable digital acquisition and tracking controller
Programmable digital frequency-phase discriminator
Programmable frequency and signalling format tone frequency enco
Programmable hand held labeler
Programmable multiple type data set
Programmable noise bandwidth reduction by means of digital avera
Programmable randomly tunable digital demodulator
Programmable time invariant coherent spread symbol correlator
Programmable two-part matched filter for spread spectrum
Programmable two-part matched filter for spread spectrum
Protection channel monitoring system using a check signal compri
Protection of energy information in sub-band coding
Protection switching system for carrier transmission line
Protocol analyzer pod for the ISDN U-interface
Pseudo-noise modem and related digital correlation method
Pseudo-random convolutional interleaving
Pseudo-random noise detector for signals having a carrier freque