Analog Devices AD9361 Reference Manual page 52

UG-570
Table 35. Gain Step Calibration Register Values vs. LO Frequency
LO Frequency
Range (MHz) Step Description
600 to 1300 Maximum LNA Gain
LNA Gain difference word for Index 0
LNA Gain difference word for Index 1
LNA Gain difference word for Index 2
LNA Gain difference word for Index 3
1300 to 3300 Maximum LNA Gain
LNA Gain difference word for Index 0
LNA Gain difference word for Index 1
LNA Gain difference word for Index 2
LNA Gain difference word for Index 3
2700 to 4100 Maximum LNA Gain
LNA Gain difference word for Index 0
LNA Gain difference word for Index 1
LNA Gain difference word for Index 2
LNA Gain difference word for Index 3
4000 to 6000 Maximum LNA Gain
LNA Gain difference word for Index 0
LNA Gain difference word for Index 1
LNA Gain difference word for Index 2
LNA Gain difference word for Index 3
4. Program the directly-addressable register values as shown in Table 36.
Table 36. Configure LNA Gain Step Parameters
Line Number Command
1 SPIWrite
2 SPIWrite
3 SPIWrite
4 SPIWrite
5 SPIWrite
6 SPIWrite
Step
Value (dB)
24
23
8
3
0
24
22
8
3
0
23
22
8
3
0
20
18
8
3
0
Addr/Data Comment
145,0F //Set maximum mixer gain index (always 0x0F)
148,0E //Maximum measurement time
147,3F //Maximum settling time
158,0D //Default RSSI measurement mode
150,0E //Maximum RSSI measurement time
15D,xx //Maximum LNA Gain (from Table 35)
Rev. A | Page 52 of 128
AD9361 Reference Manual
Register Value Variable in Table 36, Table 37,
(hex) and Table 39
C0 Xx
2E Aa
10 Bb
6 Cc
0 Dd
C0 Xx
2C Aa
10 Bb
6 Cc
0 Dd
B8 Xx
2C Aa
10 Bb
6 Cc
0 Dd
A0 Xx
24 Aa
10 Bb
6 Cc
0 Dd