User's Manual

ITC2100-NA Operation and Service Manual Version 1.0
© SWISSPHONE Wireless AG
Page 28 of 129
Fig. 5-10: Fixture (Non-binding photograph)
Selection of HF-cable
The recommended Trimble Bullet III, 5V GPS antenna has an LNA gain of 35dB. 22m RG-
188 or RG316 cables have a damping of 22m*1.20dB/m=27dB.
35dB-27dB = 8dB total gain (minimum gain).
The cable type to be used results from the demanded cable length. In the case of RG-
213/RG-217, the cable is so thick that an SMA plug cannot be mounted on and a TNC,
BNC or N connector is necessary instead. Therefore, an adapter from TNC, BNC or N to
SMA should be used here.
GPS antenna gain:
Trimble Bullet III, 5V
+35dB
Damping of the coax-
ial cable:
Cable type:
Max.
Länge:
-30dB
RG-316/RG-188 (1.20dB/m)
25m
RG-58 PE (0.95dB/m)
31.5m
RG-142 (0.65dB/m)
46m
LowLoss240flex (0.41dB/m)
73m
Only with adapter plug (Because of cable thick-
ness):
RG-213 (0.34dB/m)
88m
RG-217 (0.25dB/m)
120m
1/4" Cellflex (0.18dB/m)
165m
Minimum total gain
+5dB