User's Manual

Navini Networks, Inc. Ripwave Base Station I&C Guide
118
Cable Selection for TTA Systems
Cable selection for a TTA system is extremely simple. Just follow the steps listed below. Notice
that if you are using only the Secondary (Built-In) Surge Protection, you need N-QMA cables,
but if you are using Primary Surge Protection (surge protectors in the RFS and on a ground buss
bar close to the BTS), then you need N-N cables from the RFS to the buss bar and a set of 9 N-
QMA jumper cables from the buss bar to the BTS
1. Determine the operating frequency
2. Determine the distance between the antenna (RFS) and the BTS. This distance plus ant
slack for service and drip loops is your cable length
3. Determine if there are any restrictions regarding cable weight on the tower and minimum
cable bend radius
4. Select the right cable using the Tables H4 through H6 below.
5. If you need to use LMR400 or LMR600 cables, refer to Table H2 above for the loss,
weight and bend radius data.
TABLE H4 – Power Loss Budget and Maximum Cable Lengths for TTA Systems
Freq. Band
Min/Max
Cable Loss
Allowed
(dB)
Bundled Individual
Max Cable Length
50–250 ft
(15–76 m)
2.01 GHz
5 ≤ loss ≤ 25
RG6 RG11 LMR-240 LMR-400 LMR-600
45–230 ft
(14–70 m)
2.3 GHz
5 ≤ loss ≤ 25
45–180 ft
(14–55 m)
2.4 GHz
5 ≤ loss ≤ 20
45–215 ft
(14–65 m)
2.5–2.7 GHz
5 ≤ loss ≤ 25
35–220 ft
(11–67 m)
3.4–3.7 GHz
5 ≤ loss ≤ 30
80–390 ft
(24–119 m)
70–350 ft
(21–107 m)
70–275 ft
(21–275 m)
65–335 ft
(20–84 m)
55–340 ft
(17–104 m)
45–215 ft
(14–65 m)
40–200 ft
(12–61 m)
40–155 ft
(12–47 m)
40–190 ft
(12–58 m)
35–190 ft
(11–58 m)
85–415 ft
(26–126 m)
70–355 ft
(21–108 m)
75–295 ft
(23–90 m)
70–355 ft
(21–108 m)
60–360 ft
(18–110 m)
130–640 ft
(40–195 m)
115–565 ft
(35–172 m)
115–450 ft
(35–137 m)
110–540 ft
(33–164 m)
85–540 ft
(27–165 m)
Freq. Band
Min/Max
Cable Loss
Allowed
(dB)
Bundled Individual
Max Cable Length
50–250 ft
(15–76 m)
2.01 GHz
5 ≤ loss ≤ 25
RG6 RG11 LMR-240 LMR-400 LMR-600RG6 RG11 LMR-240 LMR-400 LMR-600
45–230 ft
(14–70 m)
2.3 GHz
5 ≤ loss ≤ 25
45–180 ft
(14–55 m)
2.4 GHz
5 ≤ loss ≤ 20
45–215 ft
(14–65 m)
2.5–2.7 GHz
5 ≤ loss ≤ 25
35–220 ft
(11–67 m)
3.4–3.7 GHz
5 ≤ loss ≤ 30
80–390 ft
(24–119 m)
70–350 ft
(21–107 m)
70–275 ft
(21–275 m)
65–335 ft
(20–84 m)
55–340 ft
(17–104 m)
45–215 ft
(14–65 m)
40–200 ft
(12–61 m)
40–155 ft
(12–47 m)
40–190 ft
(12–58 m)
35–190 ft
(11–58 m)
85–415 ft
(26–126 m)
70–355 ft
(21–108 m)
75–295 ft
(23–90 m)
70–355 ft
(21–108 m)
60–360 ft
(18–110 m)
130–640 ft
(40–195 m)
115–565 ft
(35–172 m)
115–450 ft
(35–137 m)
110–540 ft
(33–164 m)
85–540 ft
(27–165 m)