SIGNALCORE SC5510B Operating & Programming Manual page 25

Table 27 Register 0x16 RF_STANDBY (1 Byte)
Bit Type
[0] WO RF1 standby
[7:1] WO Unused
Table 28. Register 0x17 REFERENCE_MODE (1 Byte)
Bit Type
[0] WO Lock to external
reference source
[1] WO Reference out select
[2] WO PXI 10 MHz Enable
[3] WO Direct Clocking*
[4:5] WO Ext Ref Freq Select*
[7:6] WO Unused
*Only operational on devices with hardware that supports firmware version 3.0 or later.
Table 29 Register 0x18 REFRENCE_DAC_VALUE (2 Bytes)
Bit Type
[13:0] WO DAC Value
[15:14] WO Unused
Table 30 Register 0x18 ALC_DAC_VALUE (2 Bytes)
Bit Type
[13:0] WO DAC Value
[15:14] WO Unused
Table 31. Register 0x01A Reserved (1 Byte)
Bit Type
[7:0] WO Reserved
SC5510B/11B User Manual
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Rev 1.2.0
1 1 = puts the RF1 channel into standby. Standby
powers down all circuitry associated with ch1,
thus reducing power consumption.
7 Set all bits to 0.
1 1 = instructs the device to lock to external
source. No attempt will be made unless a
reference source is detected.
1 0 = Outputs a 10 MHz signal
1 = Outputs a 100 MHz signal
1 Enables the front panel connector to the PXI 10
MHz backplane clock. [only PXI interface]
1 When Ext Ref Freq is selected for 100 MHz,
enable this bit to use the signal to directly clock
the core synthesizer. Multiply units sharing a
common 100 MHz reference in this mode will
improve the phase stability between them.
2 0 = 10 MHz, 1 = 100 MHz, others reserved
2 Set all bits to 0.
14 14-bit word to set/adjust the internal 10 MHz
TCXO frequency.
2 Set all bits to 0.
14 14-bit word to set/adjust the ALC DAC value.
This is useful to make output adjustment. The
current ALC DAC value can be read back via
register 0x25
2 Set all bits to 0.
7
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