A MultiLANE BERT accessed via scopehal-mlbert-bridge. More...

#include <MultiLaneBERT.h>

Inheritance diagram for MultiLaneBERT:

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Collaboration diagram for MultiLaneBERT:

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Public Member Functions
	MultiLaneBERT (SCPITransport *transport)
	Initialize the driver.

virtual void	PostCtorInit () override
	Do initialization after the constructor finishes.

virtual bool	AcquireData () override
	Pull data from the instrument.

virtual uint32_t	GetInstrumentTypesForChannel (size_t i) const override
	Returns a bitfield describing the set of instrument types that a given channel supports.

virtual Pattern	GetTxPattern (size_t i) override
	Gets the currently selected transmit pattern for a channel.

virtual void	SetTxPattern (size_t i, Pattern pattern) override
	Sets the transmit pattern for the selected channel.

virtual std::vector< Pattern >	GetAvailableTxPatterns (size_t i) override
	Gets the list of available transmit patterns for a channel.

virtual bool	IsCustomPatternPerChannel () override
	Determines whether custom patterns are settable per channel, or shared by the whole device.

virtual size_t	GetCustomPatternLength () override
	Returns the number of bits in a custom pattern (may change with line rate)

virtual void	SetGlobalCustomPattern (uint64_t pattern) override
	Sets the global custom pattern (only valid if IsCustomPatternPerChannel returns false)

virtual uint64_t	GetGlobalCustomPattern () override
	Gets the global custom pattern (only valid if IsCustomPatternPerChannel returns false)

virtual bool	GetTxInvert (size_t i) override
	Gets the transmit invert flag for a channel.

virtual void	SetTxInvert (size_t i, bool invert) override
	Sets the transmit invert flag for a channel.

virtual std::vector< float >	GetAvailableTxDriveStrengths (size_t i) override
	Gets the list of available drive strengths (in volts) for a channel.

virtual float	GetTxDriveStrength (size_t i) override
	Get the drive strength for a channel.

virtual void	SetTxDriveStrength (size_t i, float drive) override
	Set the drive strength for a channel.

virtual void	SetTxEnable (size_t i, bool enable) override
	Sets the transmit enable flag for a channel.

virtual bool	GetTxEnable (size_t i) override
	Gets the transmit enable flag for a channel.

virtual float	GetTxPreCursor (size_t i) override
	Get the pre-cursor equalizer tap for a channel.

virtual void	SetTxPreCursor (size_t i, float precursor) override
	Set the pre-cursor equalizer tap for a channel.

virtual float	GetTxPostCursor (size_t i) override
	Get the post-cursor equalizer tap for a channel.

virtual void	SetTxPostCursor (size_t i, float postcursor) override
	Set the post-cursor equalizer tap for a channel.

virtual bool	GetRxInvert (size_t i) override
	Gets the transmit invert flag for a channel.

virtual void	SetRxInvert (size_t i, bool invert) override
	Sets the receive invert flag for a channel.

virtual bool	HasRxCTLE () override
	Determines whether the input buffer has a continuous-time linear equalizer.

virtual std::vector< float >	GetRxCTLEGainSteps () override
	Get the list of available RX CTLE gain values (in dB)

virtual size_t	GetRxCTLEGainStep (size_t i) override
	Gets the currently selected RX CTLE gain index.

virtual void	SetRxCTLEGainStep (size_t i, size_t step) override
	Sets the RX CTLE gain index.

virtual Pattern	GetRxPattern (size_t i) override
	Gets the currently selected receive pattern for a channel.

virtual void	SetRxPattern (size_t i, Pattern pattern) override
	Sets the receive pattern for the selected channel.

virtual std::vector< Pattern >	GetAvailableRxPatterns (size_t i) override
	Gets the list of available receive patterns for a channel.

virtual bool	GetRxCdrLockState (size_t i) override
	Gets the RX CDR lock state (true=lock, false=unlock)

virtual void	MeasureHBathtub (size_t i) override
	Acquires a bathtub curve.

virtual void	MeasureEye (size_t i) override
	Acquires an eye pattern.

virtual void	SetBERIntegrationLength (int64_t uis) override
	Set the integration period for BER measurements.

virtual int64_t	GetBERIntegrationLength () override
	Get the integration period for BER measurements.

virtual void	SetBERSamplingPoint (size_t i, int64_t dx, float dy) override
	Set the sampling point for BER measurements.

virtual void	GetBERSamplingPoint (size_t i, int64_t &dx, float &dy) override
	Get the sampling point for BER measurements.

virtual size_t	GetRefclkOutMux () override
	Gets the currently selected reference clock output mux setting.

virtual void	SetRefclkOutMux (size_t i) override
	Sets the reference clock output mux.

virtual std::vector< std::string >	GetRefclkOutMuxNames () override
	Gets the list of available reference clock mux settings.

virtual int64_t	GetRefclkOutFrequency () override
	Gets the currently selected refclk out frequency, in Hz.

virtual int64_t	GetRefclkInFrequency () override
	Gets the refclk in frequency, in Hz, required to generate the currently selected data rate.

virtual bool	HasRefclkIn () override
	Returns true if this instrument has a reference clock input port.

virtual bool	HasRefclkOut () override
	Returns true if this instrument has a reference clock output port.

virtual bool	IsDataRatePerChannel () override
	Determines whether the TX/RX clock is a per-instrument or per-channel setting.

virtual int64_t	GetDataRate (size_t i) override
	Gets the currently selected line rate (in symbols/sec)

virtual void	SetDataRate (size_t i, int64_t rate) override
	Sets the data rate (in symbols/sec)

virtual std::vector< int64_t >	GetAvailableDataRates () override
	Gets the list of available data rates, in symbols/sec.

virtual void	SetUseExternalRefclk (bool external) override
	Sets the reference clock source (internal or external)

virtual bool	GetUseExternalRefclk () override
	Sets the reference clock source.

Public Member Functions inherited from BERT
virtual unsigned int	GetInstrumentTypes () const override
	Returns a bitfield describing the set of instrument types that this instrument supports.

virtual int64_t	GetExpectedBathtubCaptureTime (size_t i)
	Returns the expected time, in femtoseconds, to complete a bathtub scan with the current settings.

virtual int64_t	GetExpectedEyeCaptureTime (size_t i)
	Returns the expected time, in femtoseconds, to complete an eye scan with the current settings.

virtual bool	IsHBathtubScanInProgress (size_t i)
	Returns true if a horizontal bathtub scan is in progress.

virtual bool	IsEyeScanInProgress (size_t i)
	Returns true if an eye scan is in progress.

virtual float	GetScanProgress (size_t i)
	Gets the estimated completion status (0-1) of the current scan.

virtual bool	HasConfigurableScanDepth ()
	Determines whether this instrument has configurable integration depth for eye / bathtub scans.

virtual std::vector< int64_t >	GetScanDepths (size_t i)
	Returns the list of integration depths for eye / bathtub scans.

virtual int64_t	GetScanDepth (size_t i)
	Get the configured scan depth for a channel, in UIs per sample/pixel.

virtual void	SetScanDepth (size_t i, int64_t depth)
	Set the configured scan depth for a channel.

Public Member Functions inherited from Instrument
virtual bool	IsOffline ()
	Checks if the instrument is currently online.

size_t	GetChannelCount () const
	Gets the number of channels (of any type) this instrument has.

InstrumentChannel *	GetChannel (size_t i) const
	Gets a given channel on the instrument.

virtual std::string	GetChannelDisplayName (size_t i)
	Gets the hardware display name for a channel. This is an arbitrary user-selected string.

virtual void	SetChannelDisplayName (size_t i, std::string name)
	Sets the hardware display name for a channel. This is an arbitrary user-selected string.

InstrumentChannel *	GetChannelByDisplayName (const std::string &name)
	Gets a channel given the display name.

InstrumentChannel *	GetChannelByHwName (const std::string &name)
	Gets a channel given the hardware name.

virtual void	FlushConfigCache ()
	Instruments are allowed to cache configuration settings to reduce round trip queries to the device.

virtual YAML::Node	SerializeConfiguration (IDTable &table) const
	Serializes this instrument's configuration to a YAML node.

virtual void	LoadConfiguration (int version, const YAML::Node &node, IDTable &idmap)
	Load instrument and channel configuration from a save file.

virtual void	PreLoadConfiguration (int version, const YAML::Node &node, IDTable &idmap, ConfigWarningList &warnings)
	Parse a limited subset of instrument configuration but do not apply it.

Public Member Functions inherited from SCPIInstrument
	SCPIInstrument (SCPITransport *transport, bool identify=true)

virtual std::string	GetTransportConnectionString () override
	Gets the connection string for our transport.

virtual std::string	GetTransportName () override
	Gets the name of our transport.

virtual std::string	GetName () const override

virtual std::string	GetVendor () const override

virtual std::string	GetSerial () const override

virtual std::string	GetDriverName () const =0

virtual void	BackgroundProcessing () override
	Run various background processing typically done by a second thread (e.g. InstrumentThread)

Public Member Functions inherited from SCPIDevice
	SCPIDevice (SCPITransport *transport, bool identify=true, unsigned int identify_timeout_us=5000000)

	SCPIDevice (const SCPIDevice &rhs)=delete

SCPIDevice &	operator= (const SCPIDevice &rhs)=delete

SCPITransport *	GetTransport () const

Static Public Member Functions
static std::string	GetDriverNameInternal ()
	Return the constant driver name "mlbert".

Static Public Member Functions inherited from SCPIBERT
static void	DoAddDriverClass (const std::string &name, BERTCreateProcType proc)

static void	EnumDrivers (std::vector< std::string > &names)

static std::shared_ptr< SCPIBERT >	CreateBERT (const std::string &driver, SCPITransport *transport)

Static Public Member Functions inherited from BERT
static std::string	GetPatternName (Pattern pat)
	Converts a Pattern enum into a strnig.

static Pattern	GetPatternOfName (const std::string &name)
	Converts a string name into a Pattern enum.

Static Public Member Functions inherited from SCPIInstrument
static void	DoAddDriverClass (const std::string &name, GetTransportsProcType proc)

static std::vector< SCPIInstrumentModel >	GetSupportedModels (const std::string &driver)

static std::vector< SCPIInstrumentModel >	GetDriverSupportedModels ()

Protected Types
enum	RefclkMuxSelectors { RX0_DIV8 , RX0_DIV16 , RX1_DIV8 , RX1_DIV16 , RX2_DIV8 , RX2_DIV16 , RX3_DIV8 , RX3_DIV16 , LO_DIV32_OR_80 , SERDES }
	Mux selectors for reference clock output. More...

Protected Types inherited from SCPIBERT
typedef std::map< std::string, BERTCreateProcType >	BERTCreateMapType

Protected Types inherited from SCPIInstrument
typedef std::map< std::string, GetTransportsProcType >	GetTransportMapType

Protected Attributes
int	m_rxChannelBase
	Index of the first receive channel.

Pattern	m_txPattern [4]
	Active transmit pattern.

Pattern	m_rxPattern [4]
	Active receive pattern.

bool	m_txInvert [4]
	Transmit invert flag.

bool	m_rxInvert [4]
	Receive invert flag.

float	m_txDrive [4]
	TX drive strength.

bool	m_txEnable [4]
	Transmit enable flag.

float	m_txPreCursor [4]
	TX FFE pre-cursor coefficient.

float	m_txPostCursor [4]
	TX FFE post-cursor coefficient.

bool	m_rxLock [4]
	RX pattern lock state.

uint64_t	m_txCustomPattern
	Bit pattern for TX custom-pattern mode.

size_t	m_refclkOutMux
	Reference clock output mux selector.

size_t	m_rxCtleGainSteps [4]
	CTLE gain step selected for each RX channel.

int64_t	m_integrationLength
	BER integration period.

int64_t	m_sampleX [4]
	Sample X position for BER measurements.

float	m_sampleY [4]
	Sample Y position for BER measurements.

bool	m_useExternalRefclk
	True if using external reference clock, false if internal.

uint64_t	m_dataRate
	Current data rate, in bits/sec.

Protected Attributes inherited from Instrument
std::list< sigc::slot< void(YAML::Node &, IDTable &)> >	m_serializers
	List of methods which need to be called to serialize this node's configuration.

std::list< sigc::slot< void(int, const YAML::Node &, IDTable &)> >	m_loaders
	List of methods which need to be called to deserialize this node's configuration.

std::list< sigc::slot< void(int, const YAML::Node &, IDTable &, ConfigWarningList &)> >	m_preloaders
	List of methods which need to be called to pre-load this node's configuration.

std::vector< InstrumentChannel * >	m_channels
	Set of all channels on this instrument.

Protected Attributes inherited from SCPIDevice
SCPITransport *	m_transport

std::string	m_vendor

std::string	m_model

std::string	m_serial

std::string	m_fwVersion

Additional Inherited Members
Public Types inherited from SCPIBERT
typedef std::shared_ptr< SCPIBERT >(*	BERTCreateProcType) (SCPITransport *)

Public Types inherited from BERT
enum	Pattern { PATTERN_PRBS7 , PATTERN_PRBS9 , PATTERN_PRBS11 , PATTERN_PRBS15 , PATTERN_PRBS23 , PATTERN_PRBS31 , PATTERN_CUSTOM , PATTERN_CLOCK_DIV2 , PATTERN_CLOCK_DIV32 , PATTERN_AUTO }
	Set of patterns we can generate or accept. More...

Public Types inherited from Instrument
enum	InstrumentTypes { INST_OSCILLOSCOPE = 0x01 , INST_DMM = 0x02 , INST_PSU = 0x04 , INST_FUNCTION = 0x08 , INST_RF_GEN = 0x10 , INST_LOAD = 0x20 , INST_BERT = 0x40 , INST_MISC = 0x80 , INST_SWITCH_MATRIX = 0x100 }

Public Types inherited from SCPIInstrument
typedef std::vector< SCPIInstrumentModel >(*	GetTransportsProcType) ()

Public Attributes inherited from Instrument
std::string	m_nickname
	Optional user-selected nickname of the instrument.

Protected Member Functions inherited from BERT
void	DoSerializeConfiguration (YAML::Node &node, IDTable &table)
	Serializes this BERT's configuration to a YAML node.

void	DoLoadConfiguration (int version, const YAML::Node &node, IDTable &idmap)
	Load instrument and channel configuration from a save file.

void	DoPreLoadConfiguration (int version, const YAML::Node &node, IDTable &idmap, ConfigWarningList &list)
	Validate instrument and channel configuration from a save file.

Protected Member Functions inherited from SCPIInstrument
void	DoSerializeConfiguration (YAML::Node &node, IDTable &table)

Static Protected Attributes inherited from SCPIBERT
static BERTCreateMapType	m_bertcreateprocs

Static Protected Attributes inherited from SCPIInstrument
static GetTransportMapType	m_getTransportProcs

Detailed Description

A MultiLANE BERT accessed via scopehal-mlbert-bridge.

Member Enumeration Documentation

◆ RefclkMuxSelectors

enum MultiLaneBERT::RefclkMuxSelectors

protected

Mux selectors for reference clock output.

Enumerator
RX0_DIV8	Lane 0 recovered clock, 1/8 rate.
RX0_DIV16	Lane 0 recovered clock, 1/16 rate.
RX1_DIV8	Lane 1 recovered clock, 1/8 rate.
RX1_DIV16	Lane 1 recovered clock, 1/16 rate.
RX2_DIV8	Lane 2 recovered clock, 1/8 rate.
RX2_DIV16	Lane 2 recovered clock, 1/16 rate.
RX3_DIV8	Lane 3 recovered clock, 1/8 rate.
RX3_DIV16	Lane 3 recovered clock, 1/16 rate.
LO_DIV32_OR_80	TX local oscillator divided by 32 (in low rate mode) or 80 (in high rate mode)
SERDES	Custom pattern generator output.

Constructor & Destructor Documentation

◆ MultiLaneBERT()

MultiLaneBERT::MultiLaneBERT ( SCPITransport * transport )

Initialize the driver.

Parameters

transport SCPITwinLanTransport connected to scopehal-mlbert-bridge

Member Function Documentation

◆ AcquireData()

bool MultiLaneBERT::AcquireData ( )

overridevirtual

Pull data from the instrument.

Returns: True if waveform was acquired, false if connection lost or other serious error

Implements Instrument.

◆ GetAvailableDataRates()

vector< int64_t > MultiLaneBERT::GetAvailableDataRates ( )

overridevirtual

Gets the list of available data rates, in symbols/sec.

Implements BERT.

◆ GetAvailableRxPatterns()

vector< BERT::Pattern > MultiLaneBERT::GetAvailableRxPatterns ( size_t i )

overridevirtual

Gets the list of available receive patterns for a channel.

Parameters

i	Channel index

Implements BERT.

◆ GetAvailableTxDriveStrengths()

vector< float > MultiLaneBERT::GetAvailableTxDriveStrengths ( size_t i )

overridevirtual

Gets the list of available drive strengths (in volts) for a channel.

Drive strength is nominal p-p swing with full main cursor tap and pre/post cursors at zero.

Parameters

i	Channel index

Implements BERT.

◆ GetAvailableTxPatterns()

vector< BERT::Pattern > MultiLaneBERT::GetAvailableTxPatterns ( size_t i )

overridevirtual

Gets the list of available transmit patterns for a channel.

Parameters

i	Channel index

Implements BERT.

◆ GetBERIntegrationLength()

int64_t MultiLaneBERT::GetBERIntegrationLength ( )

overridevirtual

Get the integration period for BER measurements.

Implements BERT.

◆ GetBERSamplingPoint()

void MultiLaneBERT::GetBERSamplingPoint	(	size_t	i,
		int64_t &	dx,
		float &	dy
	)

overridevirtual

Get the sampling point for BER measurements.

Parameters

i	Channel index
dx	Horizontal offset of the sampling point from the center of the eye, in femtoseconds
dy	Vertical offset of the sampling point from the center of the eye, in volts

Implements BERT.

◆ GetCustomPatternLength()

size_t MultiLaneBERT::GetCustomPatternLength ( )

overridevirtual

Returns the number of bits in a custom pattern (may change with line rate)

Returns: Length of the custom pattern

Implements BERT.

◆ GetDataRate()

int64_t MultiLaneBERT::GetDataRate ( size_t i )

overridevirtual

Gets the currently selected line rate (in symbols/sec)

Parameters

i	Channel index

Implements BERT.

◆ GetGlobalCustomPattern()

uint64_t MultiLaneBERT::GetGlobalCustomPattern ( )

overridevirtual

Gets the global custom pattern (only valid if IsCustomPatternPerChannel returns false)

Returns: The bit sequence

Implements BERT.

◆ GetInstrumentTypesForChannel()

uint32_t MultiLaneBERT::GetInstrumentTypesForChannel ( size_t i ) const

overridevirtual

Returns a bitfield describing the set of instrument types that a given channel supports.

Parameters

i	Channel index

Implements Instrument.

◆ GetRefclkInFrequency()

int64_t MultiLaneBERT::GetRefclkInFrequency ( )

overridevirtual

Gets the refclk in frequency, in Hz, required to generate the currently selected data rate.

Implements BERT.

◆ GetRefclkOutFrequency()

int64_t MultiLaneBERT::GetRefclkOutFrequency ( )

overridevirtual

Gets the currently selected refclk out frequency, in Hz.

Implements BERT.

◆ GetRefclkOutMux()

size_t MultiLaneBERT::GetRefclkOutMux ( )

overridevirtual

Gets the currently selected reference clock output mux setting.

Implements BERT.

◆ GetRefclkOutMuxNames()

vector< string > MultiLaneBERT::GetRefclkOutMuxNames ( )

overridevirtual

Gets the list of available reference clock mux settings.

Mux selector names are free-form text whose meaning is defined by the instrument.

Implements BERT.

◆ GetRxCdrLockState()

bool MultiLaneBERT::GetRxCdrLockState ( size_t i )

overridevirtual

Gets the RX CDR lock state (true=lock, false=unlock)

NOTE: For some instruments this is just CDR lock, for others it indicates both CDR and pattern checker lock

Parameters

i	Channel index

Implements BERT.

◆ GetRxCTLEGainStep()

size_t MultiLaneBERT::GetRxCTLEGainStep ( size_t i )

overridevirtual

Gets the currently selected RX CTLE gain index.

To get the actual gain in dB, use this value as the index into the table returned by GetRxCTLEGainSteps()

Parameters

i	Channel index

Implements BERT.

◆ GetRxCTLEGainSteps()

vector< float > MultiLaneBERT::GetRxCTLEGainSteps ( )

overridevirtual

Get the list of available RX CTLE gain values (in dB)

Implements BERT.

◆ GetRxInvert()

bool MultiLaneBERT::GetRxInvert ( size_t i )

overridevirtual

Gets the transmit invert flag for a channel.

Parameters

i	Channel index

Implements BERT.

◆ GetRxPattern()

BERT::Pattern MultiLaneBERT::GetRxPattern ( size_t i )

overridevirtual

Gets the currently selected receive pattern for a channel.

Parameters

i	Channel index

Implements BERT.

◆ GetTxDriveStrength()

float MultiLaneBERT::GetTxDriveStrength ( size_t i )

overridevirtual

Get the drive strength for a channel.

Parameters

i	Channel index

Implements BERT.

◆ GetTxEnable()

bool MultiLaneBERT::GetTxEnable ( size_t i )

overridevirtual

Gets the transmit enable flag for a channel.

Parameters

i	Channel index

Implements BERT.

◆ GetTxInvert()

bool MultiLaneBERT::GetTxInvert ( size_t i )

overridevirtual

Gets the transmit invert flag for a channel.

Parameters

i	Channel index

Implements BERT.

◆ GetTxPattern()

BERT::Pattern MultiLaneBERT::GetTxPattern ( size_t i )

overridevirtual

Gets the currently selected transmit pattern for a channel.

Parameters

i	Channel index

Implements BERT.

◆ GetTxPostCursor()

float MultiLaneBERT::GetTxPostCursor ( size_t i )

overridevirtual

Get the post-cursor equalizer tap for a channel.

Equalizer coefficients are are normalized so that 0 is the lowest possible tap value and 1 is the highest possible tap value. Some instruments allow negative values (which invert the sign of the tap).

The exact mapping of normalized coefficients to FFE gain steps is instrument specific and may be nonlinear.

Parameters

i	Channel index

Implements BERT.

◆ GetTxPreCursor()

float MultiLaneBERT::GetTxPreCursor ( size_t i )

overridevirtual

Get the pre-cursor equalizer tap for a channel.

Equalizer coefficients are are normalized so that 0 is the lowest possible tap value and 1 is the highest possible tap value. Some instruments allow negative values (which invert the sign of the tap).

The exact mapping of normalized coefficients to FFE gain steps is instrument specific and may be nonlinear.

Parameters

i	Channel index

Implements BERT.

◆ GetUseExternalRefclk()

bool MultiLaneBERT::GetUseExternalRefclk ( )

overridevirtual

Sets the reference clock source.

Returns: True if external clock is in use, false if internal

Implements BERT.

◆ HasRefclkIn()

bool MultiLaneBERT::HasRefclkIn ( )

overridevirtual

Returns true if this instrument has a reference clock input port.

Implements BERT.

◆ HasRefclkOut()

bool MultiLaneBERT::HasRefclkOut ( )

overridevirtual

Returns true if this instrument has a reference clock output port.

Implements BERT.

◆ HasRxCTLE()

bool MultiLaneBERT::HasRxCTLE ( )

overridevirtual

Determines whether the input buffer has a continuous-time linear equalizer.

Implements BERT.

◆ IsCustomPatternPerChannel()

bool MultiLaneBERT::IsCustomPatternPerChannel ( )

overridevirtual

Determines whether custom patterns are settable per channel, or shared by the whole device.

Returns: True = per channel, false = global

Implements BERT.

◆ IsDataRatePerChannel()

bool MultiLaneBERT::IsDataRatePerChannel ( )

overridevirtual

Determines whether the TX/RX clock is a per-instrument or per-channel setting.

Returns: True if clock is a per-channel setting, false if global

Implements BERT.

◆ MeasureEye()

void MultiLaneBERT::MeasureEye ( size_t i )

overridevirtual

Acquires an eye pattern.

Parameters

i	Channel index

Implements BERT.

◆ MeasureHBathtub()

void MultiLaneBERT::MeasureHBathtub ( size_t i )

overridevirtual

Acquires a bathtub curve.

Parameters

i	Channel index

Implements BERT.

◆ PostCtorInit()

void MultiLaneBERT::PostCtorInit ( )

overridevirtual

Do initialization after the constructor finishes.

Implements SCPIBERT.

◆ SetBERIntegrationLength()

void MultiLaneBERT::SetBERIntegrationLength ( int64_t uis )

overridevirtual

Set the integration period for BER measurements.

Longer values give better resolution for low BERs but update more slowly

Implements BERT.

◆ SetBERSamplingPoint()

void MultiLaneBERT::SetBERSamplingPoint	(	size_t	i,
		int64_t	dx,
		float	dy
	)

overridevirtual

Set the sampling point for BER measurements.

Parameters

i	Channel index
dx	Horizontal offset of the sampling point from the center of the eye, in femtoseconds
dy	Vertical offset of the sampling point from the center of the eye, in volts

Implements BERT.

◆ SetDataRate()

void MultiLaneBERT::SetDataRate	(	size_t	i,
		int64_t	rate
	)

overridevirtual

Sets the data rate (in symbols/sec)

Parameters

i	Channel index
rate	Baud rate of the channel

Implements BERT.

◆ SetGlobalCustomPattern()

void MultiLaneBERT::SetGlobalCustomPattern ( uint64_t pattern )

overridevirtual

Sets the global custom pattern (only valid if IsCustomPatternPerChannel returns false)

Parameters

pattern The bit sequence (up to 64 bits in length)

Implements BERT.

◆ SetRefclkOutMux()

void MultiLaneBERT::SetRefclkOutMux ( size_t i )

overridevirtual

Sets the reference clock output mux.

Parameters

i	Index of the mux within the table returned by GetRefclkOutMuxNames()

Implements BERT.

◆ SetRxCTLEGainStep()

void MultiLaneBERT::SetRxCTLEGainStep	(	size_t	i,
		size_t	step
	)

overridevirtual

Sets the RX CTLE gain index.

Parameters

i	Channel index
step	Index of the gain value within the GetRxCTLEGainSteps() table to use

Implements BERT.

◆ SetRxInvert()

void MultiLaneBERT::SetRxInvert	(	size_t	i,
		bool	invert
	)

overridevirtual

Sets the receive invert flag for a channel.

Parameters

i	Channel index
invert	True = inverted, false = inverted

Implements BERT.

◆ SetRxPattern()

void MultiLaneBERT::SetRxPattern	(	size_t	i,
		Pattern	pattern
	)

overridevirtual

Sets the receive pattern for the selected channel.

Parameters

i	Channel index
pattern	Desired input pattern

Implements BERT.

◆ SetTxDriveStrength()

void MultiLaneBERT::SetTxDriveStrength	(	size_t	i,
		float	drive
	)

overridevirtual

Set the drive strength for a channel.

Parameters

i	Channel index
drive	Nominal p-p swing

Implements BERT.

◆ SetTxEnable()

void MultiLaneBERT::SetTxEnable	(	size_t	i,
		bool	enable
	)

overridevirtual

Sets the transmit enable flag for a channel.

Parameters

i	Channel index
enable	True = enabled, false = disabled

Implements BERT.

◆ SetTxInvert()

void MultiLaneBERT::SetTxInvert	(	size_t	i,
		bool	invert
	)

overridevirtual

Sets the transmit invert flag for a channel.

Parameters

i	Channel index
invert	True = inverted, false = normal

Implements BERT.

◆ SetTxPattern()

void MultiLaneBERT::SetTxPattern	(	size_t	i,
		Pattern	pattern
	)

overridevirtual

Sets the transmit pattern for the selected channel.

Parameters

i	Channel index
pattern	The selected pattern

Implements BERT.

◆ SetTxPostCursor()

void MultiLaneBERT::SetTxPostCursor	(	size_t	i,
		float	postcursor
	)

overridevirtual

Set the post-cursor equalizer tap for a channel.

Equalizer coefficients are are normalized so that 0 is the lowest possible tap value and 1 is the highest possible tap value. Some instruments allow negative values (which invert the sign of the tap).

The exact mapping of normalized coefficients to FFE gain steps is instrument specific and may be nonlinear.

Parameters

i	Channel index
postcursor	Post-cursor tap

Implements BERT.

◆ SetTxPreCursor()

void MultiLaneBERT::SetTxPreCursor	(	size_t	i,
		float	precursor
	)

overridevirtual

Set the pre-cursor equalizer tap for a channel.

Equalizer coefficients are are normalized so that 0 is the lowest possible tap value and 1 is the highest possible tap value. Some instruments allow negative values (which invert the sign of the tap).

The exact mapping of normalized coefficients to FFE gain steps is instrument specific and may be nonlinear.

Parameters

i	Channel index
precursor	Pre-cursor tap

Implements BERT.

◆ SetUseExternalRefclk()

void MultiLaneBERT::SetUseExternalRefclk ( bool external )

overridevirtual

Sets the reference clock source (internal or external)

Parameters

external True to select external clock, false to select internal

Implements BERT.

The documentation for this class was generated from the following files:

lib/scopehal/MultiLaneBERT.h
lib/scopehal/MultiLaneBERT.cpp

Public Member Functions

Static Public Member Functions

Protected Types

Protected Attributes

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ RefclkMuxSelectors

Constructor & Destructor Documentation

◆ MultiLaneBERT()

Member Function Documentation

◆ AcquireData()

◆ GetAvailableDataRates()

◆ GetAvailableRxPatterns()

◆ GetAvailableTxDriveStrengths()

◆ GetAvailableTxPatterns()

◆ GetBERIntegrationLength()

◆ GetBERSamplingPoint()

◆ GetCustomPatternLength()

◆ GetDataRate()

◆ GetGlobalCustomPattern()

◆ GetInstrumentTypesForChannel()

◆ GetRefclkInFrequency()

◆ GetRefclkOutFrequency()

◆ GetRefclkOutMux()

◆ GetRefclkOutMuxNames()

◆ GetRxCdrLockState()

◆ GetRxCTLEGainStep()

◆ GetRxCTLEGainSteps()

◆ GetRxInvert()

◆ GetRxPattern()

◆ GetTxDriveStrength()

◆ GetTxEnable()

◆ GetTxInvert()

◆ GetTxPattern()

◆ GetTxPostCursor()

◆ GetTxPreCursor()

◆ GetUseExternalRefclk()

◆ HasRefclkIn()

◆ HasRefclkOut()

◆ HasRxCTLE()

◆ IsCustomPatternPerChannel()

◆ IsDataRatePerChannel()

◆ MeasureEye()

◆ MeasureHBathtub()

◆ PostCtorInit()

◆ SetBERIntegrationLength()

◆ SetBERSamplingPoint()

◆ SetDataRate()

◆ SetGlobalCustomPattern()

◆ SetRefclkOutMux()

◆ SetRxCTLEGainStep()

◆ SetRxInvert()

◆ SetRxPattern()

◆ SetTxDriveStrength()

◆ SetTxEnable()

◆ SetTxInvert()

◆ SetTxPattern()

◆ SetTxPostCursor()

◆ SetTxPreCursor()

◆ SetUseExternalRefclk()