Contents

Configure RF Propagation Settings

To set the default AP, Client, and Sensor antenna gain values, select Configuration > System > Advanced Settings > RF Propagation.

Default RF Propagation Settings contains these options:

  • Default Antenna Gain Values — Antenna gain is a characteristic of an antenna used for transmitting or receiving signal, defined as gain in power when signal is received (or transmitted) using the antenna.
  • Transmitter Losses — Select the transmitter signal loss value suited to your environment.
  • If your environment has metal or concrete walls, select a higher signal value.
  • If your environment has large spaces where the signal can propagate without obstruction, select a lower signal loss value.
  • When a device transmits, some loss in power occurs because of antenna connectors, and electromagnetic and environmental factors. This loss might be different in different frequency bands. You can also specify the approximate loss in each band.
  • Signal Decay Values — Signal propagation depends heavily on environment. The obstacles present in the environment may impede signal propagation and limit the signal range. It is very difficult to accurately model signal propagation in all kinds of environments, but by fine-tuning these options, you can fine-tune your environment for optimum signal propagation.
  • Minimum and Maximum Signal Decay Constants — Specify the range for the decay exponent at which signal decays with distance. Signal Decay Slope (Beta) and Signal Decay Inflection (Alpha) control how the decay exponent changes from its minimum value to maximum value.
  • For Nodes with an imported Planner file, you can specify:
  • Minimum Signal Decay Constant
  • Maximum Signal Decay Constant
  • Signal Decay Slope (Beta)
  • Signal Decay Inflection (Alpha)
  • For Nodes with GIF, JPEG or Blank layout, you can specify:
  • Minimum Signal Decay Constant
  • Maximum Signal Decay Constant
  • Signal Decay Slope (Beta)
  • Signal Decay Inflection (Alpha)

Planner models the most significant objects; therefore, the Maximum Signal Decay Constant should be close to 2.0.

To configure RF propagation:

  1. Select Configuration > System Settings > Advanced Settings > RF Propagation.
  2. Specify the default Sensor, AP, and Client antenna gain values.

Field

Description

Sensor Antenna Gain (db)

Gain of antenna attached to the sensor.

AP Antenna Gain (db)

Gain of antenna attached to the AP.

 Client Antenna Gain (db)

Gain of antenna attached to the client.

  1. Select the transmitter signal loss value suited to your environment.
  2. Specify the loss at source for 802.11a transmitter (db).
  3. Specify the loss at source for 802.11b/g transmitter (db).
  4. Specify the options for nodes imported with Planner: minimum signal decay constant, maximum signal decay constant, signal decay slope (beta), and signal decay slope (alpha).
  5. Specify the options for nodes with GIF, JPEG or blank layout: Minimum signal decay constant, maximum signal decay constant, signal decay slope (beta), and signal decay slope (alpha).
  6. Click Save.

Restore RF Propagation Defaults

You can restore the RF propagation fields to their default values. The default values for the RF propagation related fields are:

Sensor Antenna Gain

 2.3 db

AP Antenna Gain

2.3 db

Client Antenna Gain

0 db

Loss at Source for 802.11a Transmitter

10 db

Loss at Source for 802.11b/g Transmitter

10 db

For Nodes imported with Planner

Minimum Signal Decay Constant

2

Maximum Signal Decay Constant

2

Signal Decay Slope (Beta)

0.08

Signal Decay Slope (Alpha)

-4

For Nodes with GIF, JPEG or blank layout

Minimum Signal Decay Constant

2

Maximum Signal Decay Constant

2.5

Signal Decay Slope(Beta)

0.08

Signal Decay Slope(Alpha)

-4

To restore RF propagation settings:

  1. Select Configuration > System Settings > Advanced Settings > RF Propagation.
  2. Click Restore Defaults.
  3. Click Save.

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