GC5316_14 Datasheet, PDF (42/76 Pages) Texas Instruments – HIGH-DENSITY DIGITAL DOWNCONVERTER AND UPCONVERTER

GC5316
SLWS154A − JANUARY 2004 − REVISED MARCH 2004
Table 17. Programming
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VARIABLE
interf_scale_0(3:0)
interf_scale_1(3:0)
interf_scale_2(3:0)
interf_scale_3(3:0)
interf_round(1:0)
DESCRIPTION
Selects the sum chain scale value for each of the four sum chains. The 18-bit output
can be slide anywhere across the 26-bit window.
0000 = sumchain(25:8)
0001 = sumchain(24:7)
…
0111 = sumchain(18:1)
1000 = sumchain(17:0)
Specifies the rounding of all four sum chains.
00 = 18 bits
01 = 16 bits
10 = 14 bits
11 = 12 bits
3.2.1 Transmit Power Meters
Figure 36. Transmit Power Meter Block
The composite power in each of the four transmit sum chains can be measured using power meters similar to those
used in the individual DDC and DUC blocks.
There are four composite RMS power meters, one for each of the four sum chains. Each of the above power meters
are independently programmable with respect to the measurement period, interval, and delay from sync. The
following two sections describe the sum chain power meters in more detail.
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