для Cisco Cisco 1900 2900 3900 Series 4-Port Gigabit Ethernet HS-WIC with PoE
Configuring Cisco EHWIC and 880G for 3.7G (HSPA+)/3.5G (HSPA)
Supported Cisco Antennas and Cables
39
Configuring Cisco EHWIC-3G-HSPA-U
OL-24265-03
Figure 20
Antenna Options
Note
Antenna orientation can increase or decrease signal reception due to polarization. Typically, an SP’s
transmitting antenna on the BTS is a vertically polarized omnidirectional antenna, which means the
electromagnetic waves are transmitted from it in a vertical plane. Hence, the receiving antenna needs to
be vertically oriented too in order to receive the best signal. As the angle of the antenna orientation is
changed from vertical to horizontal, only an angular component of the signal is picked up by the antenna.
Therefore, if the antenna orientation is horizontal, the antenna picks up the least signal. The signal is
received by the antenna as a result of it bouncing off of reflective surfaces. Hence, depending on where
the antenna is placed, it may receive different signal strengths. However, the recommended position is
vertical.
transmitting antenna on the BTS is a vertically polarized omnidirectional antenna, which means the
electromagnetic waves are transmitted from it in a vertical plane. Hence, the receiving antenna needs to
be vertically oriented too in order to receive the best signal. As the angle of the antenna orientation is
changed from vertical to horizontal, only an angular component of the signal is picked up by the antenna.
Therefore, if the antenna orientation is horizontal, the antenna picks up the least signal. The signal is
received by the antenna as a result of it bouncing off of reflective surfaces. Hence, depending on where
the antenna is placed, it may receive different signal strengths. However, the recommended position is
vertical.
C881G ISR or router
with 3G EHWIC card
with 3G EHWIC card
Cisco 3G-ANTM-OUT-OM
Mast Mount Outdoor
Omnidirectional Antenna
Cisco 3G-ANTM-OUT-LP
Low Profile Rugged
Outdoor Antenna
Fixture Integrated with
LMR-195 RF Cable
(15 feet)
RF Cables
Cisco 3G-CAB-ULL-20
Cisco 3G-CAB-ULL-50
Cisco 3G-CAB-LMR240-25
Cisco 3G-CAB-LMR240-50
Cisco 3G-CAB-LMR240-75
Cisco 3G-CAB-ULL-50
Cisco 3G-CAB-LMR240-25
Cisco 3G-CAB-LMR240-50
Cisco 3G-CAB-LMR240-75
277505
C881G ISR or router
with 3G EHWIC card
with 3G EHWIC card
Cisco 3G-ACC-OUT-LA
Lightening Arrestor
RF Cables
Cisco 3G-CAB-ULL-20
Cisco 3G-CAB-ULL-50
Cisco 3G-CAB-LMR240-25
Cisco 3G-CAB-LMR240-50
Cisco 3G-CAB-LMR240-75
Cisco 3G-CAB-ULL-50
Cisco 3G-CAB-LMR240-25
Cisco 3G-CAB-LMR240-50
Cisco 3G-CAB-LMR240-75