Connecting Cisco EHWIC-3G-EVDO-x to the Network
Connecting an Antenna to EHWIC-3G-EVDO
12
Connecting Cisco EHWIC-3G-EVDO-
x
to the Network
Connecting Swivel-Mount Dipole Antennas
If you are using Cisco swivel-mounted dipole antennas, follow these steps:
Step 1
Attach an antenna to each TNC antenna connector on the front of the EHWIC card and tighten it
hand-tight.
Step 2
Orient the antennas, depending on how you intend to mount the router in which the card is installed.
•
If the router is on a table or desk, orient the antennas to the left and right sides so that they are at a
90-degree angle to each other. (See
Figure 5
.)
•
If the router is on a vertical surface, such as a wall, orient the antennas up and at a 90-degree angle
to each other.
•
If the router is on a ceiling, orient the antennas down and at a 90-degree angle to each other.
Note
Although it is not absolutely necessary, for best RF performance, do not attach the dipole antenna
directly to the face-plate of the card. Use the antenna extension cable and antenna base recommended
for the product.
Faceplate-Mounted and Ceiling-Mounted Antennas and Cabling
Depending on the wireless environment, wall-mounted or ceiling-mounted antennas may be preferred
for optimum radio coverage. If the length of the coaxial antenna cable is insufficient to cover the distance
between the EHWIC card and the location of the installed antenna, you can use ultra-low-loss TNC
extension cables between the EHWIC card and the antenna cable.
RF energy is carried between the antennas and the radio equipment through a coaxial cable. An antenna
cable introduces signal loss in the antenna system for both the transmitter and the receiver.
Although the cable run can be 100 feet (30 m) or more from the EHWIC card to antenna locations, the
longer the cable run, the greater the signal loss. To reduce signal loss, minimize the cable length and use
only ultra-low-loss antenna cables to connect radio devices to antennas.
To connect faceplate-mounted or ceiling-mounted antennas, follow the installation instructions for your
antenna:
•
For more information about connecting the 3G-ANTM1919D antenna to EHWIC cards, see the
Cisco Multiband Swivel Mount Dipole Antenna (3G-ANTM1919D)
document.
•
For more information about connecting the 3G-ANT1916-CM antenna to EHWIC cards, see the
Cisco Multiband Omnidirectional Ceiling Mount Antenna (3G-ANTM1916-CM)
document.
•
For more information about connecting the 3G-AE015-R antenna extension to EHWIC cards, see
the
Cisco Extended Antenna Base (3G-AE015-R)
document.
