Analog Devices ADRV9001 User Manual page 88

UG-1828
BBIC LOADS
DEVICE PROFILE
FH DATA
ARM IMAGE ...
INIT RADIO
RUN INIT CAL.
ALGORITHMS
STORE RESULTS.
MORE
FREQUENCY TO
CALIBRATE?
N
INIT
DONE
Frequency Region
During characterization of the PLL, frequency regions are determined. The calibration algorithms determine the frequency region that
the specific algorithm will be done in.
When user provides the frequency table, which indicates the frequencies are going to be used in hopping, the firmware maps those
frequencies into frequency regions. "Initial calibration frequency list" in this table is the list of the center frequency for each region. For
example, it is possible the user wants to hop in 20 different frequencies but this might only cover 5 regions. Therefore, calibration can be
done for just those 5 regions. This relates to the band index in the previous section. At hop time when there is a new frequency, this
frequency is mapped into a region, then the calibration coefficients are loaded for that region.
In the case the users do not want to/cannot provide a frequency table, they do however need to provide the minimum and maximum
frequency for frequency hopping operation. Once the min and max frequencies are provided, the frequency regions are determined
internally and calibration is done for those regions. However, this is not ideal for the reason that the number of regions might be large
and calibration therefore might take a longer time.
Initial Calibration Frequency Information (API)
Following parameters are not implemented yet, only an indication of what is forthcoming. The table is updated as parameters become
available.
Table 36. Parameters for Initialization and Calibration
Parameter
Number of 0 to 64
bands/regions
Initial calibration List of frequencies to be used for
frequency list initial calibrations.
Number of gains
Range of MIN and MAX gain levels
TX gain range
which TX operates on
RX gain range Range of MIN and MAX gain levels
which RX operates on
INIT CAL FREQ TABLE
ID FREQUENCY
1
Y
2
SWITCH TO
NEXT FREQUENCY
3
4
5
6
Figure 83. Initialization and Calibration for Frequency Hopping
Rev. PrA | Page 88 of 253
Preliminary Technical Data
FH CONFIG
ID ITEMS
1 FH MODE
2 CHANNEL SELECT MODE
3 FREQUENCY SELECT MODE
FH INIT CAL INFORMATION
ID ITEMS
1 NUM INIT CAL FREQUECIES
0.5GHz
2 INIT CAL FREQUENCY LIST
1.2GHz
3 NUMBER OF GAINS
2.5GHz
3.3GHz
FH HOP TABLES
4.2GHz
ID ITEMS
5.4GHz
1 NUM HOP FREQUECIES
2 FREQUENCY HOP LIST
3 FREQUENCY RANGE LIST
Notes
Number of initial calibration frequencies.
Depending on characterization results. Could be, for example, centre
frequency of each frequency band used.
Number of gains levels to calibrate over.
This may or may not be needed if we have gain range?
Gain levels specified in dB.
Gain levels specified in dB.