Texas Instruments AFE79 Series - 1.2.3.3 TX Tone Generator Configuration

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106
SBAU337–May 2020
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Macro
1.2.3.3 TX Tone Generator Configuration
This macro can be used to configure a chosen TX channel to send out a single tone of desired power and
frequency.
Table 1-51.
Macro TX Tone Generator Configuration
Opcode 0x48
Operand Offset Length Value Functionality Results
1 0x00 1 TX Channel Select Channel Select
0 → Tone to be
sent on 1TX
1 → Tone to be
sent on 2TX
2 → Tone to be
sent on 3TX
3 → Tone to be
sent on T4X
2 0x01 1 Tone Gen
Command
Tone Generation
Command
0 → RESERVED
1 → Save existing
configuration and
apply the new tone
configuration for the
selected channel
2 → Apply new tone
configuration only
3 → RESERVED
4 → Restore saved
configuration.
3 0x02 1 RESERVED
Write 0 here
4 0x03 4 Tone Frequency Transmit tone
frequency
The value specified
here is the tone
frequency with units
being determined
based on the
Channel Frequency
Resolution Macro.
In case of 1-kHz
resolution mode,
value of up to TX-
DAC-RATE is only
allowed.
5 0x07 1 Tone Back-off Tone Back-off (dB)
Tone power back-
off in dB with
respect to the full
scale DAC output.
E.g. a value of 2 will
result in a tone
power of -2 dBFS.
Note: Although the
macro takes a back-
off value in 1-dB
step, the actual
resolution is ~ 2 dB
for low back-off
values.
Only used during
‘continue’ calibration
command
6 0x08 1 RESERVED
Write 0 here
7 0x09 4 RESERVED
Write 0 here
Memory Not Used