The user can refer to the “RECEIVER GAIN CONTROL AND GAIN COMPENSATION” section in the user guide to get an insight into the Rx/ORx gain table architecture. The Rx and ORX gain table share the same architecture, however the user can load different gain table for the Rx path and the ORx path. The user can load different gain table for Rx or ORx using the API function adi_adrv9025_ RxGainTableWrite(). This function uses rxChannelMask as one of the input parameters with which the user can load a different gain table for the desired ORx channel. The default ORx gain table has 0.5dB step on ADI EVB system. The user can change the gain step from default 0.5dB to 1dB by removing every other FE Control Word & digital gain setting in the default gain table provided by ADI. The front end attenuator has an 8-bit control word. The amount of attenuation applied depends on the value set in the front-end attenuator column of the selected gain table index. The following equation provides an approximate relationship between the internal attenuator and the front-end attenuation value programmed in the gain table, N: The signed digital gain/attenuation is used to apply gain or attenuation digitally. The range of the digital gain is 0 to 50 dB. The range of the digital attenuation is 0 to 18 dB. The resolution of the steps is 0.05 dB. As an example, a value of 14 would result in 0.7 dB gain, and a value of -14 would result in 0.7 dB of attenuation. If the user wants to set the ORx gain step to 1dB, they can use the sample ORx gain table as shown below. Please note that the gain table provided below has been optimized for accurate step size based on silicon characterization. Gain Index FE Control Word TIA Control ADC Control Ext Control Phase Offset Digital Gain 0 0 0 0 0 0 0 1 0 0 0 0 0 0 2 0 0 0 0 0 0 3 0 0 0 0 0 0 4 0 0 0 0 0 0 5 0 0 0 0 0 0 6 0 0 0 0 0 0 7 0 0 0 0 0 0 8 0 0 0 0 0 0 9 0 0 0 0 0 0 10 0 0 0 0 0 0 11 0 0 0 0 0 0 12 0 0 0 0 0 0 13 0 0 0 0 0 0 14 0 0 0 0 0 0 15 0 0 0 0 0 0 16 0 0 0 0 0 0 17 0 0 0 0 0 0 18 0 0 0 0 0 0 19 0 0 0 0 0 0 20 0 0 0 0 0 0 21 0 0 0 0 0 0 22 0 0 0 0 0 0 23 0 0 0 0 0 0 24 0 0 0 0 0 0 25 0 0 0 0 0 0 26 0 0 0 0 0 0 27 0 0 0 0 0 0 28 0 0 0 0 0 0 29 0 0 0 0 0 0 30 0 0 0 0 0 0 31 0 0 0 0 0 0 32 0 0 0 0 0 0 33 0 0 0 0 0 0 34 0 0 0 0 0 0 35 0 0 0 0 0 0 36 0 0 0 0 0 0 37 0 0 0 0 0 0 38 0 0 0 0 0 0 39 0 0 0 0 0 0 40 0 0 0 0 0 0 41 0 0 0 0 0 0 42 0 0 0 0 0 0 43 0 0 0 0 0 0 44 0 0 0 0 0 0 45 0 0 0 0 0 0 46 0 0 0 0 0 0 47 0 0 0 0 0 0 48 0 0 0 0 0 0 49 0 0 0 0 0 0 50 0 0 0 0 0 0 51 0 0 0 0 0 0 52 0 0 0 0 0 0 53 0 0 0 0 0 0 54 0 0 0 0 0 0 55 0 0 0 0 0 0 56 0 0 0 0 0 0 57 0 0 0 0 0 0 58 0 0 0 0 0 0 59 0 0 0 0 0 0 60 0 0 0 0 0 0 61 0 0 0 0 0 0 62 0 0 0 0 0 0 63 0 0 0 0 0 0 64 0 0 0 0 0 0 65 0 0 0 0 0 0 66 0 0 0 0 0 0 67 0 0 0 0 0 0 68 0 0 0 0 0 0 69 0 0 0 0 0 0 70 0 0 0 0 0 0 71 0 0 0 0 0 0 72 0 0 0 0 0 0 73 0 0 0 0 0 0 74 0 0 0 0 0 0 75 0 0 0 0 0 0 76 0 0 0 0 0 0 77 0 0 0 0 0 0 78 0 0 0 0 0 0 79 0 0 0 0 0 0 80 0 0 0 0 0 0 81 0 0 0 0 0 0 82 0 0 0 0 0 0 83 0 0 0 0 0 0 84 0 0 0 0 0 0 85 0 0 0 0 0 0 86 0 0 0 0 0 0 87 0 0 0 0 0 0 88 0 0 0 0 0 0 89 0 0 0 0 0 0 90 0 0 0 0 0 0 91 0 0 0 0 0 0 92 0 0 0 0 0 0 93 0 0 0 0 0 0 94 0 0 0 0 0 0 95 0 0 0 0 0 0 96 0 0 0 0 0 0 97 0 0 0 0 0 0 98 0 0 0 0 0 0 99 0 0 0 0 0 0 100 0 0 0 0 0 0 101 0 0 0 0 0 0 102 0 0 0 0 0 0 103 0 0 0 0 0 0 104 0 0 0 0 0 0 105 0 0 0 0 0 0 106 0 0 0 0 0 0 107 0 0 0 0 0 0 108 0 0 0 0 0 0 109 0 0 0 0 0 0 110 0 0 0 0 0 0 111 0 0 0 0 0 0 112 0 0 0 0 0 0 113 0 0 0 0 0 0 114 0 0 0 0 0 0 115 0 0 0 0 0 0 116 0 0 0 0 0 0 117 0 0 0 0 0 0 118 0 0 0 0 0 0 119 0 0 0 0 0 0 120 0 0 0 0 0 0 121 0 0 0 0 0 0 122 0 0 0 0 0 0 123 0 0 0 0 0 0 124 0 0 0 0 0 0 125 0 0 0 0 0 0 126 0 0 0 0 0 0 127 0 0 0 0 0 0 128 0 0 0 0 0 0 129 0 0 0 0 0 0 130 0 0 0 0 0 0 131 0 0 0 0 0 0 132 0 0 0 0 0 0 133 0 0 0 0 0 0 134 0 0 0 0 0 0 135 0 0 0 0 0 0 136 0 0 0 0 0 0 137 0 0 0 0 0 0 138 0 0 0 0 0 0 139 0 0 0 0 0 0 140 0 0 0 0 0 0 141 0 0 0 0 0 0 142 0 0 0 0 0 0 143 0 0 0 0 0 0 144 0 0 0 0 0 0 145 0 0 0 0 0 0 146 0 0 0 0 0 0 147 0 0 0 0 0 0 148 0 0 0 0 0 0 149 0 0 0 0 0 0 150 0 0 0 0 0 0 151 0 0 0 0 0 0 152 0 0 0 0 0 0 153 0 0 0 0 0 0 154 0 0 0 0 0 0 155 0 0 0 0 0 0 156 0 0 0 0 0 0 157 0 0 0 0 0 0 158 0 0 0 0 0 0 159 0 0 0 0 0 0 160 0 0 0 0 0 0 161 0 0 0 0 0 0 162 0 0 0 0 0 0 163 0 0 0 0 0 0 164 0 0 0 0 0 0 165 0 0 0 0 0 0 166 0 0 0 0 0 0 167 0 0 0 0 0 0 168 0 0 0 0 0 0 169 0 0 0 0 0 0 170 0 0 0 0 0 0 171 0 0 0 0 0 0 172 0 0 0 0 0 0 173 0 0 0 0 0 0 174 0 0 0 0 0 0 175 0 0 0 0 0 0 176 0 0 0 0 0 0 177 0 0 0 0 0 0 178 0 0 0 0 0 0 179 0 0 0 0 0 0 180 0 0 0 0 0 0 181 0 0 0 0 0 0 182 0 0 0 0 0 0 183 0 0 0 0 0 0 184 0 0 0 0 0 0 185 0 0 0 0 0 0 186 0 0 0 0 0 0 187 0 0 0 0 0 0 188 0 0 0 0 0 0 189 0 0 0 0 0 0 190 0 0 0 0 0 0 191 0 0 0 0 0 0 192 0 0 0 0 0 0 193 0 0 0 0 0 0 194 0 0 0 0 0 0 195 0 0 0 0 0 0 196 0 0 0 0 0 0 197 0 0 0 0 0 0 198 0 0 0 0 0 0 199 0 0 0 0 0 0 200 0 0 0 0 0 0 201 0 0 0 0 0 0 202 0 0 0 0 0 0 203 0 0 0 0 0 0 204 0 0 0 0 0 0 205 0 0 0 0 0 0 206 0 0 0 0 0 0 207 0 0 0 0 0 0 208 0 0 0 0 0 0 209 0 0 0 0 0 0 210 0 0 0 0 0 0 211 0 0 0 0 0 0 212 0 0 0 0 0 0 213 0 0 0 0 0 0 214 0 0 0 0 0 0 215 0 0 0 0 0 0 216 0 0 0 0 0 0 217 0 0 0 0 0 0 218 0 0 0 0 0 0 219 0 0 0 0 0 0 220 0 0 0 0 0 0 221 0 0 0 0 0 0 222 0 0 0 0 0 0 223 0 0 0 0 0 0 224 0 0 0 0 0 0 225 248 0 0 0 0 -4 226 247 0 0 0 0 -9 227 247 0 0 0 0 11 228 245 0 0 0 0 -5 229 244 0 0 0 0 0 230 243 0 0 0 0 5 231 241 0 0 0 0 -1 232 239 0 0 0 0 -4 233 237 0 0 0 0 -4 234 235 0 0 0 0 -2 235 233 0 0 0 0 2 236 230 0 0 0 0 0 237 227 0 0 0 0 1 238 223 0 0 0 0 -1 239 219 0 0 0 0 -1 240 215 0 0 0 0 0 241 210 0 0 0 0 0 242 204 0 0 0 0 -1 243 198 0 0 0 0 0 244 190 0 0 0 0 -1 245 183 0 0 0 0 1 246 173 0 0 0 0 0 247 163 0 0 0 0 0 248 151 0 0 0 0 0 249 137 0 0 0 0 0 250 121 0 0 0 0 0 251 104 0 0 0 0 0 252 83 0 0 0 0 0 253 59 0 0 0 0 0 254 30 0 0 0 0 0 255 0 0 0 0 0 0 This should help the user to set the ORx gain step to 1 dB for the desired ORx channel. Below is the test result on ADI EVB board with the 1dB step gain table for reference: Test conditions: Rx LO = Tx LO = RFLO = LO2 = 3500MHz; ORxLO = Aux LO = 3505.04MHz; ORx1 path injected with 3510MHz CW tone generated by signal generator; Test result: ORx Gain Index Power(dBFs) Step Error Between Current Gain Index and Previous Gain Index (dB) Step Error Between Current Gain Index and Max Gain Index 255(dB) 255 -5.057 0 0 254 -5.945 0.112 0.112 253 -6.927 0.018 0.13 252 -7.898 0.029 0.159 251 -8.903 -0.005 0.154 250 -9.839 0.064 0.218 249 -10.783 0.056 0.274 248 -11.792 -0.009 0.265 247 -12.775 0.017 0.282 246 -13.721 0.054 0.336 245 -14.727 -0.006 0.33 244 -15.688 0.039 0.369 243 -16.658 0.03 0.399 242 -17.632 0.026 0.425 241 -18.637 -0.005 0.42 240 -19.615 0.022 0.442 239 -20.554 0.061 0.503 238 -21.556 -0.002 0.501 237 -22.524 0.032 0.533 236 -23.553 -0.029 0.504 235 -24.527 0.026 0.53 234 -25.533 -0.006 0.524 233 -26.531 0.002 0.526 232 -27.524 0.007 0.533 231 -28.487 0.037 0.57 230 -29.477 0.01 0.58 229 -30.482 -0.005 0.575 228 -31.494 -0.012 0.563 227 -32.518 -0.024 0.539 226 -33.515 0.003 0.542 225 -34.468 0.047 0.589 If the user find the ORx gain step error doesn’ t match well with ADI EVB test result. To confirm the ORx gain table inside chip match with expectation. The user can call the API function adi_adrv9025_RxGainTableRead to read back the programmed ORx path gain table for a given channel.

ADRV9026 ORx Gain Table

adrv9026_support

on Jun 25, 2020

The user can refer to the “RECEIVER GAIN CONTROL AND GAIN COMPENSATION” section in the user guide to get an insight into the Rx/ORx gain table architecture. The Rx and ORX gain table share the same architecture, however the user can load different gain table for the Rx path and the ORx path. The user can load different gain table for Rx or ORx using the API function adi_adrv9025_ RxGainTableWrite(). This function uses rxChannelMask as one of the input parameters with which the user can load a different gain table for the desired ORx channel. The default ORx gain table has 0.5dB step on ADI EVB system. The user can change the gain step from default 0.5dB to 1dB by removing every other FE Control Word & digital gain setting in the default gain table provided by ADI.

The front end attenuator has an 8-bit control word. The amount of attenuation applied depends on the value set in the front-end attenuator column of the selected gain table index. The following equation provides an approximate relationship between the internal attenuator and the front-end attenuation value programmed in the gain table, N:

The signed digital gain/attenuation is used to apply gain or attenuation digitally. The range of the digital gain is 0 to 50 dB. The range of the digital attenuation is 0 to 18 dB. The resolution of the steps is 0.05 dB. As an example, a value of 14 would result in 0.7 dB gain, and a value of -14 would result in 0.7 dB of attenuation.

If the user wants to set the ORx gain step to 1dB, they can use the sample ORx gain table as shown below. Please note that the gain table provided below has been optimized for accurate step size based on silicon characterization.

Gain Index	FE Control Word	TIA Control	ADC Control	Ext Control	Phase Offset	Digital Gain
0	0	0	0	0	0	0
1	0	0	0	0	0	0
2	0	0	0	0	0	0
3	0	0	0	0	0	0
4	0	0	0	0	0	0
5	0	0	0	0	0	0
6	0	0	0	0	0	0
7	0	0	0	0	0	0
8	0	0	0	0	0	0
9	0	0	0	0	0	0
10	0	0	0	0	0	0
11	0	0	0	0	0	0
12	0	0	0	0	0	0
13	0	0	0	0	0	0
14	0	0	0	0	0	0
15	0	0	0	0	0	0
16	0	0	0	0	0	0
17	0	0	0	0	0	0
18	0	0	0	0	0	0
19	0	0	0	0	0	0
20	0	0	0	0	0	0
21	0	0	0	0	0	0
22	0	0	0	0	0	0
23	0	0	0	0	0	0
24	0	0	0	0	0	0
25	0	0	0	0	0	0
26	0	0	0	0	0	0
27	0	0	0	0	0	0
28	0	0	0	0	0	0
29	0	0	0	0	0	0
30	0	0	0	0	0	0
31	0	0	0	0	0	0
32	0	0	0	0	0	0
33	0	0	0	0	0	0
34	0	0	0	0	0	0
35	0	0	0	0	0	0
36	0	0	0	0	0	0
37	0	0	0	0	0	0
38	0	0	0	0	0	0
39	0	0	0	0	0	0
40	0	0	0	0	0	0
41	0	0	0	0	0	0
42	0	0	0	0	0	0
43	0	0	0	0	0	0
44	0	0	0	0	0	0
45	0	0	0	0	0	0
46	0	0	0	0	0	0
47	0	0	0	0	0	0
48	0	0	0	0	0	0
49	0	0	0	0	0	0
50	0	0	0	0	0	0
51	0	0	0	0	0	0
52	0	0	0	0	0	0
53	0	0	0	0	0	0
54	0	0	0	0	0	0
55	0	0	0	0	0	0
56	0	0	0	0	0	0
57	0	0	0	0	0	0
58	0	0	0	0	0	0
59	0	0	0	0	0	0
60	0	0	0	0	0	0
61	0	0	0	0	0	0
62	0	0	0	0	0	0
63	0	0	0	0	0	0
64	0	0	0	0	0	0
65	0	0	0	0	0	0
66	0	0	0	0	0	0
67	0	0	0	0	0	0
68	0	0	0	0	0	0
69	0	0	0	0	0	0
70	0	0	0	0	0	0
71	0	0	0	0	0	0
72	0	0	0	0	0	0
73	0	0	0	0	0	0
74	0	0	0	0	0	0
75	0	0	0	0	0	0
76	0	0	0	0	0	0
77	0	0	0	0	0	0
78	0	0	0	0	0	0
79	0	0	0	0	0	0
80	0	0	0	0	0	0
81	0	0	0	0	0	0
82	0	0	0	0	0	0
83	0	0	0	0	0	0
84	0	0	0	0	0	0
85	0	0	0	0	0	0
86	0	0	0	0	0	0
87	0	0	0	0	0	0
88	0	0	0	0	0	0
89	0	0	0	0	0	0
90	0	0	0	0	0	0
91	0	0	0	0	0	0
92	0	0	0	0	0	0
93	0	0	0	0	0	0
94	0	0	0	0	0	0
95	0	0	0	0	0	0
96	0	0	0	0	0	0
97	0	0	0	0	0	0
98	0	0	0	0	0	0
99	0	0	0	0	0	0
100	0	0	0	0	0	0
101	0	0	0	0	0	0
102	0	0	0	0	0	0
103	0	0	0	0	0	0
104	0	0	0	0	0	0
105	0	0	0	0	0	0
106	0	0	0	0	0	0
107	0	0	0	0	0	0
108	0	0	0	0	0	0
109	0	0	0	0	0	0
110	0	0	0	0	0	0
111	0	0	0	0	0	0
112	0	0	0	0	0	0
113	0	0	0	0	0	0
114	0	0	0	0	0	0
115	0	0	0	0	0	0
116	0	0	0	0	0	0
117	0	0	0	0	0	0
118	0	0	0	0	0	0
119	0	0	0	0	0	0
120	0	0	0	0	0	0
121	0	0	0	0	0	0
122	0	0	0	0	0	0
123	0	0	0	0	0	0
124	0	0	0	0	0	0
125	0	0	0	0	0	0
126	0	0	0	0	0	0
127	0	0	0	0	0	0
128	0	0	0	0	0	0
129	0	0	0	0	0	0
130	0	0	0	0	0	0
131	0	0	0	0	0	0
132	0	0	0	0	0	0
133	0	0	0	0	0	0
134	0	0	0	0	0	0
135	0	0	0	0	0	0
136	0	0	0	0	0	0
137	0	0	0	0	0	0
138	0	0	0	0	0	0
139	0	0	0	0	0	0
140	0	0	0	0	0	0
141	0	0	0	0	0	0
142	0	0	0	0	0	0
143	0	0	0	0	0	0
144	0	0	0	0	0	0
145	0	0	0	0	0	0
146	0	0	0	0	0	0
147	0	0	0	0	0	0
148	0	0	0	0	0	0
149	0	0	0	0	0	0
150	0	0	0	0	0	0
151	0	0	0	0	0	0
152	0	0	0	0	0	0
153	0	0	0	0	0	0
154	0	0	0	0	0	0
155	0	0	0	0	0	0
156	0	0	0	0	0	0
157	0	0	0	0	0	0
158	0	0	0	0	0	0
159	0	0	0	0	0	0
160	0	0	0	0	0	0
161	0	0	0	0	0	0
162	0	0	0	0	0	0
163	0	0	0	0	0	0
164	0	0	0	0	0	0
165	0	0	0	0	0	0
166	0	0	0	0	0	0
167	0	0	0	0	0	0
168	0	0	0	0	0	0
169	0	0	0	0	0	0
170	0	0	0	0	0	0
171	0	0	0	0	0	0
172	0	0	0	0	0	0
173	0	0	0	0	0	0
174	0	0	0	0	0	0
175	0	0	0	0	0	0
176	0	0	0	0	0	0
177	0	0	0	0	0	0
178	0	0	0	0	0	0
179	0	0	0	0	0	0
180	0	0	0	0	0	0
181	0	0	0	0	0	0
182	0	0	0	0	0	0
183	0	0	0	0	0	0
184	0	0	0	0	0	0
185	0	0	0	0	0	0
186	0	0	0	0	0	0
187	0	0	0	0	0	0
188	0	0	0	0	0	0
189	0	0	0	0	0	0
190	0	0	0	0	0	0
191	0	0	0	0	0	0
192	0	0	0	0	0	0
193	0	0	0	0	0	0
194	0	0	0	0	0	0
195	0	0	0	0	0	0
196	0	0	0	0	0	0
197	0	0	0	0	0	0
198	0	0	0	0	0	0
199	0	0	0	0	0	0
200	0	0	0	0	0	0
201	0	0	0	0	0	0
202	0	0	0	0	0	0
203	0	0	0	0	0	0
204	0	0	0	0	0	0
205	0	0	0	0	0	0
206	0	0	0	0	0	0
207	0	0	0	0	0	0
208	0	0	0	0	0	0
209	0	0	0	0	0	0
210	0	0	0	0	0	0
211	0	0	0	0	0	0
212	0	0	0	0	0	0
213	0	0	0	0	0	0
214	0	0	0	0	0	0
215	0	0	0	0	0	0
216	0	0	0	0	0	0
217	0	0	0	0	0	0
218	0	0	0	0	0	0
219	0	0	0	0	0	0
220	0	0	0	0	0	0
221	0	0	0	0	0	0
222	0	0	0	0	0	0
223	0	0	0	0	0	0
224	0	0	0	0	0	0
225	248	0	0	0	0	-4
226	247	0	0	0	0	-9
227	247	0	0	0	0	11
228	245	0	0	0	0	-5
229	244	0	0	0	0	0
230	243	0	0	0	0	5
231	241	0	0	0	0	-1
232	239	0	0	0	0	-4
233	237	0	0	0	0	-4
234	235	0	0	0	0	-2
235	233	0	0	0	0	2
236	230	0	0	0	0	0
237	227	0	0	0	0	1
238	223	0	0	0	0	-1
239	219	0	0	0	0	-1
240	215	0	0	0	0	0
241	210	0	0	0	0	0
242	204	0	0	0	0	-1
243	198	0	0	0	0	0
244	190	0	0	0	0	-1
245	183	0	0	0	0	1
246	173	0	0	0	0	0
247	163	0	0	0	0	0
248	151	0	0	0	0	0
249	137	0	0	0	0	0
250	121	0	0	0	0	0
251	104	0	0	0	0	0
252	83	0	0	0	0	0
253	59	0	0	0	0	0
254	30	0	0	0	0	0
255	0	0	0	0	0	0

This should help the user to set the ORx gain step to 1 dB for the desired ORx channel. Below is the test result on ADI EVB board with the 1dB step gain table for reference:

Test conditions:

Rx LO = Tx LO = RFLO = LO2 = 3500MHz;
ORxLO = Aux LO = 3505.04MHz;
ORx1 path injected with 3510MHz CW tone generated by signal generator;

Test result:

ORx Gain Index	Power(dBFs)	Step Error Between Current Gain Index and Previous Gain Index (dB)	Step Error Between Current Gain Index and Max Gain Index 255(dB)
255	-5.057	0	0
254	-5.945	0.112	0.112
253	-6.927	0.018	0.13
252	-7.898	0.029	0.159
251	-8.903	-0.005	0.154
250	-9.839	0.064	0.218
249	-10.783	0.056	0.274
248	-11.792	-0.009	0.265
247	-12.775	0.017	0.282
246	-13.721	0.054	0.336
245	-14.727	-0.006	0.33
244	-15.688	0.039	0.369
243	-16.658	0.03	0.399
242	-17.632	0.026	0.425
241	-18.637	-0.005	0.42
240	-19.615	0.022	0.442
239	-20.554	0.061	0.503
238	-21.556	-0.002	0.501
237	-22.524	0.032	0.533
236	-23.553	-0.029	0.504
235	-24.527	0.026	0.53
234	-25.533	-0.006	0.524
233	-26.531	0.002	0.526
232	-27.524	0.007	0.533
231	-28.487	0.037	0.57
230	-29.477	0.01	0.58
229	-30.482	-0.005	0.575
228	-31.494	-0.012	0.563
227	-32.518	-0.024	0.539
226	-33.515	0.003	0.542
225	-34.468	0.047	0.589

If the user find the ORx gain step error doesn’t match well with ADI EVB test result. To confirm the ORx gain table inside chip match with expectation. The user can call the API function adi_adrv9025_RxGainTableRead to read back the programmed ORx path gain table for a given channel.

Edit Notes

Add 1dB gain step test result on ADI EVB board for reference;
[edited by: adrv9026_support at 5:11 AM (GMT 0) on 29 Jun 2020]

srimoyi

on Jan 14, 2021 12:07 PM
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ADRV9026 ORx Gain Table

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