Clear-Com Encore AX-704, Instruction Manual

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P I C - 4 7 0 4 , M A - 7 0 4 & A X - 7 0 4 I F B S Y S T E M
2 - 5
INTERCONNECT CABLING
Use one multi-pair cable for each group of four channels when connecting the
IFB lines between the access stations and their associated component (other
MA-704s or AX-704s and the PIC-4704). This cable must have (four) separately
shielded conductors or pairs of conductors to prevent crosstalk. Suitable cable
types are: Alpha #6054, Belden #8725 or 9330, and Mogami #2602. As noted in
the previous section, the resistance buildup in both the power and common (or
ground) conductors must be kept at a minimum for proper operation. Resistance
buildup in the common conductor will also increase crosstalk. Follow the
diagram below for best results in connecting the cable to the XLR connectors.
Notice that all four of the spare conductors in each pair are tied together to pin 2
(DC power), and all shields are tied together to pin 1 (common). This
arrangement minimizes resistance buildup effects in long cable runs.
Clear-Com has ready-made cable in 25, 50, and 100 foot lengths to fit your
cabling and system architecture needs.
Figure 2-7: XLR6 Cable Wiring
In a system with more than four talent positions (one group), the cue audio from
the MA-704’s mic preamp and the ALL control signal must be bussed from the
MA-704 to each AX-704 unit. A two-conductor shielded mic cable with
1/4-inch TRS phone plugs at each end is used for this purpose. Refer to Figure
2-8 for pinout details.
Note: The diagram shows the access stations for talent positions 5–8 connected in
a “hub” from the second PIC-4704 while the stations for the first group of
talent positions (1–4) are shown connected in the “daisy-chain” method. In
practice, stations for both groups of talents would be interconnected in the
same manner.
Connect single channel talent receivers to the PIC-4704 using standard
two-conductor mic cable. Only two conductors are necessary for cabling between
the power supply and the PIC-4704(s). If any section of this cable is more than a
few feet long, be sure that heavy-guage wire is used.