REG:23:1E – AGC_STAT1 – AGC Status Register
The bits of the AGC_STAT1 register are described below:
Description of fields within Sub-Register 0x23:1E – AGC_STAT1
This 5-bit gain value relates to input noise power measurement. EDG1 can be used in
conjunction with the EDV2 value to give a measure of the background in-band noise energy
level. This might be used for an Energy Detect (ED channel scan) as part of implementing the
IEEE 802.15.4 standard’s MLME-SCAN request primitive. The noise energy level is given by
combining EDG1 and EDV2 value as described in Figure 27 below.
EDV2
reg:23:1E
bits:19–11
This 9-bit value relates to the input noise power measurement. EDV2 can be used in
conjunction with the EDG1 value to give a measure of the background in-band noise energy
level. This might be used for an Energy Detect (ED channel scan) as part of implementing the
IEEE 802.15.4 standard’s MLME-SCAN request primitive. The noise energy level is given by
combining EDG1 and EDV2 value as described in Figure 27 below.
Combining EDG1 and EDV2 value to get a noise energy level is achieved by the equation:
Where
is a scaling factor dependant on channel as per Table 27 below: -
Table 27: Scaling factor for channel noise energy estimation
The above formula does not give an absolute level but instead gives a relative level that allows comparison
between channels in order to select the channel with least noise.
Figure 27: Combining EDG1 and EDV2 to give an ED noise figure
7.2.37 Register file: 0x24 – External Synchronisation Control
External synchronisation control
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