:TIMebase:SCRecovery:PLLoop:ORDer

Command Syntax

TIMebase:SCRecovery:PLLoop:ORDer  {FIRSt | SECond | THIRd}

Query Syntax

TIMebase:SCRecovery:PLLoop:ORDer?

Query Response

{FIRS | SEC | THIR}

Description

Selects a first, second, or third order low-pass filter for the FlexRT software clock recovery's phase lock loop. The following arguments are used:

FIRSt

Selects a first-order loop. Use the :TIMebase:SCRecovery:PLLoop:MODE command to define either the Jitter Transfer Function (JTF) or Observed Jitter Transfer Function (OJTF) type of PLL. The transfer functions are defined using the :TIMebase:SCRecovery:PLLoop:JTF:BANDwidth and :TIMebase:SCRecovery:PLLoop:OJTF:BANDwidth commands.

SECond

Selects a second-order loop. This is the default selection. Use the :TIMebase:SCRecovery:PLLoop:MODE command to define either the Jitter Transfer Function (JTF) or Observed Jitter Transfer Function (OJTF) type of PLL. The JTF is defined using the :TIMebase:SCRecovery:PLLoop:JTF:BANDwidth and :TIMebase:SCRecovery:PLLoop:JTF:PEAKing commands. The OJTF is defined using the :TIMebase:SCRecovery:PLLoop:OJTF:BANDwidth and :TIMebase:SCRecovery:PLLoop:OJTF:DFACtor commands.

THIRd

Selects a third-order loop. Use the :TIMebase:SCRecovery:PLLoop:FGAIn command to enter the frequency for the loop's gain. Use the :TIMebase:SCRecovery:PLLoop:FPOLe command to enter the frequency for the loop's pole. Use the :TIMebase:SCRecovery:PLLoop:FZERo command to enter the frequency for the loop's zero.