Lime Microsystems LMS7002M Series, Руководство по программированию и калибровке

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Table 13: TRX gain configuration memory
Address (15 bits) Bits Description
0x0125 15 – 10
9 – 5
4 – 0 CG_IAMP_TBB_(1, 2)[5:0]: This controls the front-end gain of the TBB. For a given
gain value, this control value varies with the set TX mode. After resistance
calibration, the following table gives the nominal values for each frequency setting.
However, this table is to be updated and corrected after calibration.
Default: 37
Low Band:
5 – when 2.4MHz
7 – when 2.74MHz
12 – when 5.5MHz
18 – when 8.2MHz
24 – when 11MHz
High Band:
18 – when 18.5MHz
37 – when 38MHz
54 – when 54MHz
LOSS_LIN_TXPAD_TRF_(1, 2)[4:0]: Controls the gain of the linearizing part of the
TXPAD.
Default: 0
0<=Loss<=10 – Pout=Pout_max-Loss
11<=Loss<31 – Pout=Pout_max-10-2*(Loss-10)
Ideally LOSS_LIN = LOSS_MAIN
LOSS_MAIN_TXPAD_TRF_(1, 2)[4:0]: Controls the gain & output power of the
TXPAD.
Default: 0
0<=Loss<=10 – Pout=Pout_max-Loss
11<=Loss<31 – Pout=Pout_max-10-2*(Loss-10)
Default : 10010100 00000000
0x0126 15 – 13
12 – 11
10 – 6
5 – 2
1 – 0
Reserved
C_CTL_PGA_RBB_(1, 2)[7:0]: Control the value of the feedback capacitor of the
PGA that is used to help against the parasitic cap at the virtual node for stability.
3 – when 0<=G_PGA_RBB<8
2 – when 8<=G_PGA_RBB<13 (default)
1 – when 13<=G_PGA_RBB<21
0 – when 21<=G_PGA_RBB
G_PGA_RBB_(1, 2)[4:0]: This is the gain of the PGA. The gain is adaptively set to
maintain signal swing of 0.6Vpkd at the output of the PGA. The value of the gain is:
Gain(dB) = -12+G_PGA_RBB.
Default: 11
G_LNA_RFE_(1, 2)[3:0]: Controls the gain of the LNA
15 – Gmax (default)
14 – Gmax-1
13 – Gmax-2
12 – Gmax-3
11 – Gmax-4
10 – Gmax-5
9 – Gmax-6
8 – Gmax-9
7 – Gmax-12
6 – Gmax-15
5 – Gmax-18
4 – Gmax-21
3 – Gmax-24
2 – Gmax-27
1 – Gmax-30
G_TIA_RFE_(1, 2)[1:0]: Controls the Gain of the TIA.
3 – Gmax (default)
2 – Gmax-3
1 – Gmax-12
0 - Not allowed
Default : 00010010 11111111