HP Manager Software manual RF Trends Columns, As cordless phones and webcams, appear to generate

Using the RF Trends Window 401

Table 56 lists the information displayed in the top section of the RF Trends window.

Table 56 RF Trends Columns

Column	Description
Radio	MAP name and radio number.
SNR	Signal-to-noise ratio of the last data packet received by the
	radio.
Throughput	Rate at which data is transmitted by the radio, in bits per
	second.
Authorized Clients	Number of authorized clients associated with the radio.
Client Failures	Combined number of the following types of errors:
	„	802.1X failures
	„	association failures
	„	authentication failures
	„	authorization failures
802.11 Packet Errors	Number of frames received by the MAP radio that had
	physical layer errors on the active channel. These errors
	can indicate interference from a non-802.11 device.

Non-802.11 PHY Errors Number of times the radio detected energy on the active channel that either was not recognizable as an 802.11 frame, or was above the power level of background noise.

Re-transmits	Number of retransmitted packets sent from the client to
	the radio on the active channel. Retransmissions can
	indicate that the client is not receiving ACKs from the MAP
	radio.
Receiver Threshold	Radio’s hearing sensitivity, in decibels (dB).
Noise Floor (dBm)	Current level of ambient radio noise present in the
	environment.
	The noise floor can increase sharply when a microwave
	oven is operating. Certain 2.4 gigahertz transmitters, such
	as cordless phones and webcams, appear to generate
	“noise”, even though they are transmitting data. The data
	is not encoded in 802.11 format, so it is not recognized as
	data, but is perceived as noise.

If the SNR, Associated Clients, or Receiver Threshold column is red, this indicates that the threshold configured for this parameter has been exceeded. (See “Changing Monitoring Settings” on page 489.)