User's Manual

6 nMIMO2458 Operating Manual
WARNING:
MAXIMUM EIRP
Up to 31.51 dBm effective
isotropically radiated power
(EIRP) in 2.4 GHz Band.
Therefore, the sum of the
transmitted power (in dBm), the
cabling loss and the antenna gain
cannot exceed 31.51 dBm with
respect to the isotropic radiator.
WARNING:
The nMIMO2458 can only be
used with any antennas listed in
Appendix A.
WARNING:
Be careful with dBi vs dBd gains
on antenna specifications.
Antenna manufactures may not
clearly indicate the gain on the
antenna if it is dBd or dBi. Note
1dBd = 2.15dBi.
3.2.2 Antennas
Direct human contact with the antenna is potentially unhealthy when the
nMIMO2458 is generating RF energy. Always ensure that the nMIMO2458
equipment is powered down during installation. At all times a distance of 23
cm (33cm for Industry Canada) must be maintained between the antenna
and any person when the device is in operation.
Antenna Type
The nMIMO2458 is tested and approved to be used with a Rubber Ducky,
Omni-directional antenna which is suitable for applications where there are
multiple units that you must communicate with, or with units that are in
motion.
Antenna Type Note (Rubber Ducky):
Maximum Gain of 2dBi for 2.4GHz Band with a minimum cable loss of
0.49, the antenna assembly gain shall not exceed (2 – 0.49) dBi.
Maximum Gain of 3dBi for 5.8GHz Band with a minimum cable loss of
1.02, the antenna assembly gain shall not exceed (3 –1.02) dBi.
Microhard Systems Inc. can provide you with approved antennas to ensure
FCC and Industry Canada compliance.
The nMIMO2458 (2.4 GHz Band) has a maximum of 31.51 dBm effective
isotropically radiated power (EIRP).
EIRP is calculated as follows:
EIRP = Tx Power(dBm) - Cable/Connector Loss(dB) + Ant Gain(dBi)
Antenna Gains must be in dBi when calculating the EIRP limit.
1dBd = 2.15dBi
Use the guidelines in the previous section for calculating cable and
connector losses. If cabling and connector losses are 2 dB, then the
maximum allowable gain of the antenna will be 2 dB.
Maximum Antenna, Power and EIRP values for nMIMO2458
Band
Antenna
(Rubber Ducky)
Power
Level
Minimum
Cable / Loss
EIRP
2.4 GHz
2 dBi
30dBm
0.49dBi
31.51dBm
5.8 GHz
3 dBi
24.33dBm
1.02dBi
26.31dBm