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
