MSM7xx Controllers Configuration Guide v6.4.0

MSM310, MSM310-R, and MSM320
Select Diversity, Main, or Auxiliary according to the following guidelines:
• For a single antenna, connect one antenna to either Main or Aux and select the corresponding
value.
• For maximum wireless coverage, install an omnidirectional antenna on the Main and Aux
antenna connectors and select Diversity.
• When creating a point-to-point wireless bridge, HP recommends that a single directional
antenna be used on either Main or Aux.
MSM320-R
Only two antenna connectors are available on the MSM320-R. To use both radios, connect an
antenna to each connector. Diversity is not supported.
MSM335
Select either Internal or External according to the following guidelines:
• The MSM335 features six internal antennas in its two flaps, providing two antennas for each
of its three radios. Radios 1, 2, and 3, have corresponding external antenna connectors A,
B, and C for optional external antennas.
• Diversity is supported on all three radios via the internal antennas. but not when using external
antennas.
MSM422
Select either Internal or External according to the following guidelines:
Radio 1
• Radio 1 features three internal antennas in the lower flap supporting 802.11n/a/b/g. Each
antenna has a corresponding connector (A, B, C) for the installation of an optional external
antenna.
• Radio 1 supports diversity on its internal and external antennas. In 802.11n modes, a special
form of diversity, called MIMO, is used.
MIMO uses spatial multiplexing to transport two or more data streams simultaneously on the
same channel to increase throughput. For example, under most conditions, multiplexing two
streams can result in double the throughput of a single stream.
MIMO mode 3x3 is automatically used, which means that three antennas are used to transmit
and three antennas are used to receive.
• For point-to-point local mesh links on Radio 1, install two directional antennas on connectors
A and B. Installing a third directional antenna on connector C will increase performance only
when receiving.
Radio 2
• Radio 2 features two internal antennas in the upper flap supporting 802.11a/b/g. These
antennas have a single connector (D) for the installation of an optional external antenna.
• Radio 2 provides support for diversity only on its two internal antennas. Diversity is not
supported when using an external antenna.
HP 425
Select the antenna(s) on which the radio transmits and receives.
Both radios support diversity (MIMO) on both internal and external antennas.
Radio configuration 95