Clear-Com BS850 (Last time buy) - Manual (Page 10)

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PRO850 General Description:
The PRO850 is a wireless intercom system designed primarily for the professional entertainment
industry (TV, movie, and live stage productions). It is compatible with and interfaces to standard
hardwired intercom systems from Telex (RTS) and Clear-Com. Its key features are frequency agility,
audio quality, multi-channel operation, and flexibility. The figure below shows an example of how the
PRO850 system can be used.
The base is the hub of the system, combining the functions of the base transmitter and receiver(s),
cabled system interfaces, and control center in one unit. The base transmits to all Beltpacs on one or
more UHF frequencies and receives individual UHF transmissions from the respective Beltpacs. The
composite modulating signal transmitted by the base and Beltpac consists of an FM audio channel
and one low-data-rate data channel on a subcarrier.
PRO850 equipment operates in the UHF band from 470 MHz to 697.825 MHz in 18 MHz subsets.
Transmitters and receivers operate in different, non-adjacent 18 MHz bands. Synthesized frequencies
can be selected in 25 kHz increments over each 18 MHz band, for 720 transmit and 720 different
receive frequencies. The occupied bandwidth for base or Beltpac transmissions is 180 kHz.
Base and Beltpac use corresponding band pairs: 0 & 8, 1 & 9, 2 & A, 3 & B, 4 & C, 5 & D, 6 & E
Antenna marking colors are shown in parentheses.
Base Transmit Bands
Ch 14 Ch 15 Ch 16 Ch 17 Ch 18 Ch 19 Ch 20 Ch 21 Ch 22 Ch 23 Ch 24 Ch 25 Ch 26 Ch 27 Ch 28 Ch 29 Ch 30 Ch 31 Ch 32 Ch 33 Ch 34
BAND 1
(blue)
BAND 2
(none – black)
BAND 4
(red)
470 MHz 488 506 524 542 560 578 596
Beltpac Transmit Bands
Ch 38 Ch 39 Ch 40 Ch 41 Ch 42 Ch 43 Ch 44 Ch 45 Ch 46 Ch 47 Ch 48 Ch 49 Ch 50 Ch 51
BAND 9
(orange)
BAND A
(white)
BAND C
(yellow)
614 MHz 632 650 668 686 697.825