July 2002
Intermediate to advanced
344 pages
8h 37m
English
Content preview from Newnes Radio and RF Engineering Pocket Book, 3rd Edition
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208
MPT 1352 Test Schedule. For Approval of Radio Units to be
Used with Commercial Trunked Networks
Operating in Band III sub-band 2.
Frequency modulation is used with FFSK signalling, a channel spacing
of 12.5 kHz and TDMA techniques (Section 17.4).
Trans-European trunked radio (TETRA)
A new European standard for digital trunking. The system is aimed
at PMR users and will employ TDMA with four users sharing a
25 kHz radio channel with the option of two users on a 12.5 kHz
channel. Speech will be digitally encoded at 4.8 kbit/s and transmitted
at 36 kbit/s (gross bit rate including error correction overhead) using
π/4 differential quaternary phase shift keying (DQPSK).
Digital short range radio (DSRR)
This utilizes trunking techniques but with no infra-structure ...
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