Keysight N777xC Series Tunable Laser Family
Programming Guide
4 Measurement 
Operations & Settings
Root Layer Command   /  60
Signal Generation – The SOURce Subsystem   /  63
Configure Subsystem Commands   /  83
Triggering - The TRIGger Subsystem   /  86
This chapter gives descriptions of commands that you can use when you 
are setting up or performing measurements. The commands are split up 
into the following subsystems:
Root layer commands that take power measurements, configures 
triggering, and return information about the mainframe and it’s slots.
SOURce subsystem commands that control Laser Source modules, DFB 
source modules, Tunable Laser modules, and Return Loss Modules with 
internal laser sources.
Configure subsystem commands that control all instruments.
TRIGger subsystem commands that control triggering.