Toa IR-700D - Manual (Page 11)

11
[Example 2]
When connecting 4 infrared wireless receivers to a single tuner using a single coaxial cable
Precondition: Cable distance (L2) from the distributor YW-1024 to the receiver is assumed to be 25 m (27.34 yd).
Assuming that the RG-59/U coaxial cable is used in wiring between the YW-1024 and the receiver, the
attenuation of this distance is:
Attenuation = 3.3 dB x (25 m / 100 m) = 0.825 dB.
Since loss of 8.5 dB results from the YW-1024, the maximum permissible loss from the IR-700D to the YW-
1024 stands at 2.675 dB (12 dB – 0.825 dB – 8.5 dB).
If the RG-6/U coaxial cable is used in wiring from the IR-700D to the YW-1024, given the wiring distance
between the two is L1,
L1 = (coaxial cable attenuation/coaxial cable attenuation per 100 m)
= (2.5 dB / 2.7 dB) x 100 m
= 92 m (100.61 yd)
Maximum cable length (wiring distance from the IR-700D to the infrared wireless receiver) can be found from
the following equation:
L = L1 + 25 m
= 92 m + 25 m
= 117 m (127.95 yd)
Similarly, the maximum cable length (wiring distance from the IR-700D to the receiver) calculated relative to
the type of coaxial cable used between the IR-700D and the YW-1024 is as shown in the table below:
L
L1 25 m or 27.34 yd (L2)
BNC plug-to-BNC plug cord
(supplied with the IR-700D)
Infrared wireless receiver Infrared wireless tuner
Distributor
YW-1024
Infrared wireless distributor
IR-700D
RG-59/U 348 m (380.58 yd)
RG-6/U 414 m (452.76 yd)
RG-11/U 542 m (592.74 yd)