Preliminary Technical Data UG-1828
Rev. PrC | Page 111 of 338
In this example, shown in Figure 111, we demonstrate how to load a larger set of frequencies on the fly, then use a DGPIO pin to switch to
the new table. This is similar to the first example, however it requires an additional signal from the user, namely Hop Select signal to
switch to the new table. User will configure the table mode to automatic increment or index by pin.
User will load a larger frequency hopping table, which will be used in multiple hop frames. Once table loading into memory is complete,
user then sets the Hop Select DGPIO pin, allowing ADRV9001 to start reading from the second table at the next Hop edge.
• User should ensure the Hop Select Pin is set prior to the appropriate channel setup rising edge.
• User can use the Hop Select table pin to force the switch to the second table at any time. ADRV9001 does not require the switch to
happen after completion on the first table.
• This example is also applicable to automatic ping pong mode, as long as user ensures the second hop table is loaded in prior to the
completion of the first table.
Frequency Hopping Table Timing
Time used to load a frequency hopping table in ADRV9001 memory and receive the acknowledgement is still being characterized. This
information will be updated in future releases.
FREQUENCY HOPPING CALIBRATIONS
When frequency hopping is enabled, ADRV9001 calibrates over a range of frequencies. Since a frequency hopping table can be loaded
after initial calibrations, and a new one can be loaded during operation, ADRV9001 calibrates over 42 discrete regions, from 30MHz to
6GHz, to allow the user to operate with any frequency within this range.
The frequency regions are as follows:
Table 39 Frequency Hopping Calibration - Frequency Regions (30MHz - 6GHz)
Region index Calibration frequency (MHz) Range (MHz)
0 150 30 <= f < 250
1 350 250 <= f < 450
2 550 450 <= f < 650
3 750 650 <= f < 850
4 950 850 <= f < 1050
5 1150 1050 <= f < 1250
6 1350 1250 <= f < 1450
7 1550 1450 <= f < 1650
8 1750 1650 <= f < 1850
9 1950 1850 <= f < 2050
10 2150 2050 <= f < 2250
11 2350 2250 <= f < 2450
12 2550 2450 <= f < 2650
13 2750 2650 <= f < 2850
14 2950 2850 <= f < 3050
15
3150 3050 <= f < 3250
16 3350 3250 <= f < 3400
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