Medium Access Control (MAC) and Physical Layer (PHY) - CISE

4-June-07 P1901_PRO_016_r0
o plBasicCard: Card index.
o plBasicMode: Physical mode used by the modem. These values can reach from 1 to M, depending
on the range of frequency used.
o plBasicCentralFrequency: Mode central frequency value in KHz.
o plBasicBandwidth: Mode bandwidth in MHz.
o plBasicTXAGCEnable: Enables/disables transmission AGC. This AGC feature controls
transmission gains automatically and dynamically.
o plBasicRXAGCEnable: Enables/disables reception AGC.
o plBasicTXAGCGain: Sets/gets the transmission gain, and it can accept two values, ‘0’ and ‘1’.
These values have a ‘distance’ of 12 dB and act over the AFE amplifiers.
o plBasicRXAGCGain: Sets/gets the gain in reception, in a range of values from ‘0’ to ‘7’ in steps
of 6 dB.
o plBasicTXPowerMaskLB: Sets/gets the system powermask in the low half band of frequencies in
the whole bandwidth used by the IEEE P1901 node, from carrier numbers 1 to 768. The value is a
768-character long string, each character corresponding to a carrier, that is, the first character
corresponds to carrier number 1 and so on. These characters have a special coding, and its meaning
has to be split into two sub-codes, e.g.:
0100 0110
First 4 bits coded in steps of 6 dB for coarse attenuation.
Last 4 bits specially coded for fine attenuation.
The coding for the last 4 bits can be deduced from this graph:
Submission page 352 UPA-OPERA