ZyXEL Communications MAX-100 Series, User Manual

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ZyXEL MAX-100 Series User’s Guide
Chapter 3 Wireless Configuration 31
3.4 Frequency Settings
In a WiMAX network, a mobile or subscriber station must use a radio frequency supported by
the base station to communicate. When the ZyXEL Device looks for a connection to a base
station, it searches a range of frequencies.
Radio frequency is measured in hertz (Hz), kilohertz (kHz), megahertz (MHz) and gigahertz
(GHz).
3.4.1 Frequency Ranges
The following figure shows the ZyXEL Device searching a range of frequencies to find a
connection to a base station.
CINR mean This field shows the average Carrier to Interference plus Noise Ratio (CINR) of the
current connection. This value is an indication of overall radio signal quality. A
higher value indicates a higher signal quality, and a lower value indicates a lower
signal quality.
CINR deviation This field shows the amount of change in the CINR level. This value is an indication
of radio signal stability. A lower number indicates a more stable signal, and a higher
number indicates a less stable signal.
RSSI This field shows the Received Signal Strength Indication (RSSI). This value is a
measurement of overall radio signal strength. A higher RSSI level indicates a
stronger signal, and a lower RSSI level indicates a weaker signal.
UL Data Rate This field shows the number of data packets uploaded from the ZyXEL Device to
the base station each second.
DL Data Rate This field shows the number of data packets downloaded to the ZyXEL Device from
the base station each second.
PER This field shows the Packet Error Rate (PER). The PER is the percentage of data
packets transmitted across the network but not successfully received.
Tx Power This field shows the output transmission (Tx) level of the ZyXEL Device.
Signal Strength This bar shows the current Received Signal Strength Indication (RSSI). Signal
strength depends mainly on the antenna output power and the distance between
your ZyXEL Device and the base station.
Link Quality This bar shows the quality of the wireless connection. This refers to the percentage
of packets transmitted successfully. If there are too many wireless stations in a
wireless network, collisions may occur which could result in a loss of messages
even though you have high signal strength.
Table 6 The Link Info Screen (continued)
LABEL DESCRIPTION
Table 7 Radio Frequency Conversion
1 kHz = 1000 Hz
1 MHz = 1000 kHz (1000000 Hz)
1 GHz = 1000 MHz (1000000 kHz)