Product manual

9XTend‐PKG‐R™RS‐232/485RFModem–ProductManualv1.2.4
©2005MaxStream,Inc.ConfidentialandProprietary 53
Antennas
[Refer to Appendix A for a list of FCC-Approved Antennas]
Fa r link range:
e (interference)
XTe
cto s that determine wireless
• Ambient RF nois
• Line-of-sight obstructions
• Transmit power
• Receive sensitivity
• Antenna configuration
nd Antenna Connector Options
To comply with the FCC rules and obtain a “modular” certification, it is required that XTend
to ensure the modems are used only with
PSMA
he Reverse Polarity SMA (RPSMA) connector uses the same body as a
gular SMA connector. In order to be a “non standard” connector, the
he center conductor is changed. The female RPSMA actually
le center conductor.
An
Modems utilize a “non standard” connector. This is
approved antennas. The XTend RF Modem accepts RPSMA antennas.
R
T
re
gender of t
has a ma
tenna Cables
RF cabl ted
externally
romote signal loss which is usually measured in dB loss per 100 ft. MaxStream provides LMR-
95 rated cables. Common cables and dB losses are included in this table:
ableB‐02.PotentialSignalStrengthLossduetoAntennaCableLength
es are typically used to connect a radio installed in a cabinet to an antenna moun
. As a general rule, it is best to keep the RF cable as short as possible. All cables
p
1
T
Cable
Type
Loss at 900 MHz per 100’
(loss per 100m)
Loss at 2.4 GHz per 100’
(loss per 100m)
Diameter
RG-58 14.5 (47.4) dB 25.3 (83.2) dB 0.195” (4.95 mm)
RG-174 25.9 (85.0) dB 44.4 (145.84) dB 0.100” (2.54 mm)
RG-316 24.7 (81.0) dB 42.4 (139.0) dB 0.102” (2.59 mm)
LMR-195 11.1 (36.5) dB 19.0 (62.4) dB 0.195” (4.95 mm)
LMR-240 7.6 (24.8) dB 12.9 (42.4) dB 0.240” (6.10 mm)
LMR-600 2.5 (8.2) dB 4.4 (14.5) dB 0.590” (14.99 mm)