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SBAU337–May 2020
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Macro
1.2.1.13 RX Channel Frequency Set
This Macro specifies the channel frequencies (or carrier frequencies) for the RX channels. It allows
configuration of up to two frequencies for each band. These are designated as NCO 1 and NCO 2 (NCO:
Numerically controlled Oscillator). The unit of the frequency value specified in the macro is determined by
the Channel Frequency Resolution macro; hence the resolution supported by this interface is either 1000
Hz or RX-ADC-RATE/2
32
. A frequency value up to RX-ADC-RATE can be specified through this macro, so
the value specified here should be the target channel-frequency modulo RX-ADC-RATE. Note that the
Nyquist zone of the target channel-frequency should be specified through the RX-FB Nyquist Zone
Configuration Macro.
Table 1-26.
Macro RX Channel frequency set
Opcode 0x31
Operand Offset Length Value Functionality Results
1 0x00 1 Validity RX Channel
Frequency validity
Bit 0: 1 → Channel
Frequency value is
applicable to 1RX
Bit 1: 1 → Channel
Frequency value is
applicable to 2RX
Bit 2: 1 → Channel
Frequency value is
applicable to 3RX
Bit 3: 1 → Channel
Frequency value is
applicable to 4RX
Bits 7:4 →
RESERVED
2 0x01 1 Num NCOs Number of NCOs
per band
Bit 0: number of
NCOs in band 0
0 → single NCO
1 → dual NCO
Bit 1: number of
NCOs in band 1
0 → single NCO
1 → dual NCO
3 0x02 4 Frequency Value RX Channel
frequency for NCO
1, Band 1 in
specified resolution.
In case of 1-kHz
resolution mode,
value of up to RX-
ADC-RATE is only
allowed.
4 0x06 4 Frequency Value RX Channel
frequency for NCO
1, Band 2 in
specified resolution.
In case of 1-kHz
resolution mode,
value of up to RX-
ADC-RATE is only
allowed.
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