Cattron Safe-E-Stop - Site Planning

17
Version 17
Safe-E-Stop™
User Guide
Table 2: Frequencies That Are Not Supported
AVOID FREQUENCIES
Band B
Band D
Band F
434,177,500
466,937,500
902,600,000
912,100,000
921,600,000
902,700,000
912,200,000
921,700,000
902,800,000
912,300,000
921,800,000
902,900,000
921,100,000
921,900,000
911,700,000
921,200,000
922,000,000
911,800,000
921,300,000
922,100,000
911,900,000
921,400,000
912,000,000
921,500,000
Cattron can supply support and help with frequency selection if they are provided with a list of frequencies in use
in the immediate operating location.
4.2 Site Planning
As far as is practical, RF systems frequency separation should at least be as shown in the last column of the
table below.
Table 3: Channel Spacing for Adjacent Systems
BAND
START FREQ HZ
END FREQ
HZ
CH SPACING KHZ
START CHANNEL
END CHANNEL
CH,
SPACING
A
418,000,000
B
433,077,500
434,777,500
25
A00
A68
2 (50kHz)
C
447,000,000
D
450,000,000
470,000,000
12.5
A00
Q00
4 (50kHz)
E
868,000,000
F
902,600,000
927,500,000
100
A00
C49
2 (200kHz)
NB: channels are identified on the equipment by a three-digit identity xnn; see columns 5 and 6 above.
Channels run A00 through A99, and then B00 through B99 and so on until the End Channel is reached.
For the purposes of adjacent system channel spacing we can use the figure in the final column.
This somewhat simplifies the method of determining what channels should be chosen on a site.
When all available channels have been used with the designated channel spacing (not likely with 450MHz or
915MHz band), we can start using intermediate frequencies (one channel apart) provided that they are 100m
away from the systems one channel away.