Documentation | NodeHandler | Commands | antenna

antenna: Configure Noise Insertation and Spectrum Measurements

This command allows the experimenter to inject noise into the grid through the available antennas. While currently not supported, the same command will also provide access to spectrum analyzers.

Syntax

antenna(selector).signal.resource = value
antenna(selector).signal {}

• selector: Expression to select the antenna set.
• signal: Path to noise generator.
• resource: Name of resource.
• value: Value to assign to resource.

The supported syntax for the selector can be found in defNodes.

The current resources for the signal generator are:

• bandwidth: Bandwidth of signal
• channel: 802.11 channel
• power: Output power in dbM ???
• on: On when set to true, off when set to false

The locations of the antennas within the grid can be found missing.

Usage

antenna(4,4).signal {|s|
  s.bandwidth = 20
  s.channel = 36
  s.power = prop.noisePower
}

See Also

prop

Channel Mapping

Channels for IEEE 802.11a

Channel Identifier	Frequency in MHz
34	5170
36	5180
38	5190
40	5200
42	5210
44	5220
46	5230
48	5240
52	5260
56	5280
60	5300
64	5320
149	5745
153	5765
157	5785
161	5805

Channels for IEEE 802.11b

Channel Identifier	Frequency in MHz
1	2412
2	2417
3	2422
4	2427
5	2432
6	2437
7	2442
8	2447
9	2452
10	2457
11	2462
12	2467
13	2472
14	2484

Maximum Power Levels and Antenna Gains

IEEE 802.11a

An improper combination of power level and antenna gain can result in Effective Isotropic Radiated Power (EIRP) above the amount allowed per regulatory domain. The following table indicates the maximum power levels and antenna gains allowed for each IEEE 802.11a regulatory domain.

Regulatory Domain	Maximum Power Level (mW) with 6-dBi Antenna Gain
Americas (-A)(160 mW EIRP maximum on channels 36-48, 800 mW EIRP maximum on channels 52-64)	40
Japan (-J) (10 mW/MHz EIRP maximum)	40
Singapore (-S) (100 mW EIRP maximum)	20
Taiwan (-T) (800 mW EIRP maximum)	40

IEEE 802.11b

An improper combination of power level and antenna gain can result in EIRP above the amount allowed per regulatory domain. The following table indicates the antenna gains and the maximum power levels in mW allowed for each IEEE 802.11b regulatory domain.

• Americas (-A) (4 W EIRP maximum)
• EMEA (-E) (100 mW EIRP maximum)
• Israel (-I) (100 mW EIRP maximum)
• China (-C) (10 mW EIRP maximum)
• Japan (-J) (10 mW/MHz EIRP maximum)

Antenna Gain (dBi)	-A	-E	-I	-C	-J
0	100	100	100	5	50
2.2	100	50	50	5	30
5.2	100	30	30	n/a	30
6	100	30	30	n/a	30
8.5	100	5	5	n/a	n/a
12	100	5	5	n/a	n/a
13.5	100	5	5	n/a	5
21	20	1	1	n/a	n/a