Analog Devices ADRV9005 Reference Manual page 120

Reference Manual
FREQUENCY HOPPING
Table 49. Hop Table Entry (Continued)
Parameter
rx1GainIndex
rx2GainIndex
Tx1Attenuation_mdB
Tx2Attenuation_mdB
The channel(s) enabled for each hop frame are not known at initialization. Therefore, the hopping table does not present this information.
During FH operation, the BBIC employs the channel setup signals to inform the ADRV9001 on the channel to enable, as described earlier.
Therefore, each entry in the hop table contains parameters for both Rx and Tx, and it only utilizes the relevant parameters based on the
channel setup signals, depending on whether an upcoming hopping frame is operating on Rx or Tx. The irrelevant parameters are ignored.
Note: The TES provides some examples of hopping tables. The ranges of the fields should be the same as in the non-FH mode.
Frequency Hopping Table Modes
The ADRV9001 supports the utilization of the hopping tables in different ways. This section details the available methods to index, switch, and
update hopping tables.
Hopping Table Indexing Mode: Automatic Increment vs. Pin
Automatic Increment
The standard mode of operation in the ADRV9001 is the automatic increment mode. In this mode, FH begins at index 0, and continues to
iterate over the table until the number of table entries is reached. Once reached, it wraps back to index 0. This is also called the "Loop" mode
when one hopping table is used.
Figure 108 shows an example of automatic increment of table index with three entries in the hopping table with the PLL Retune mode.
Figure 108 shows that the ADRV9001 reads the entries at the hop edges (both rising and falling edges). Therefore, make sure the desired table
is loaded and ready to read at that time. More details about the method of loading a hopping table are discussed later.
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Descriptions
Starting gain index, if frame is Rx1.
Starting gain index, if frame is Rx2.
Starting attenuation level, in mdB, if frame is Tx1.
Starting attenuation level, in mdB, if frame is Tx2.
Figure 108. Automatic Increment Table Indexing Example with PLL Retune Mode
ADRV9001
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