Keysight N777 C Series Programming Guide

Keysight N777xC Series Tunable Laser Family Programming Guide 63
Measurement Operations & Settings 4
Signal Generation – The SOURce Subsystem
The IEEE 488.2 standard has a list of reserved commands, called source
commands. Some of these commands must be implemented by any
instrument using the standard, others are optional. Your instrument
implements all the necessary commands, and some optional ones.
This section provides the description of these commands.
Command: :SOURce0:AM:COHCtrl:COHLevel?
Syntax: :SOURce0:AM:COHCtrl:COHLevel<wsp><value>?<wsp>[MIN | MAX | DEF]
Description: Queries the current level of coherence, when using Coherence Control. Coherence is expressed on an arbitrary scale from
1 to 100%. A 100% coherence level corresponds to maximum coherence length and minimum linewidth.
Parameters: Optional MIN: returns the minimum programmable value (1%)
MAX: returns the maximum programmable value (100%)
DEF: returns the default preset (*RST) value.
Response: Returns the currently set excursion level as a percentage between 1 and 100.
Example: :sour0:am:cohc:cohl? -> 1.00000000e+00
Affects: N7778C and N7779C
Command: :SOURce0:AM:COHCtrl:COHLevel
Syntax: :SOURce0:AM:COHCtrl:COHLevel<wsp><value>[MIN | MAX | DEF]
Description: Sets the level of coherence, when using coherence control, on an arbitrary scale from 1 to 100%. A 100% coherence level
corresponds to maximum coherence length and minimum linewidth. The coherence level required for a specific linewidth
and coherence length can vary between modules.
Parameters: The excursion level as a percentage of its maximum value.
Also allowed: MIN: minimum programmable value (1%)
MAX: maximum programmable value (100%)
DEF: default preset (*RST) value.
Response: None
Example: :sour0:am:cohc:cohl 50
Affects: N7778C and N7779C

Keysight N777 C Series Specifications

General

Brand	Keysight
Model	N777 C Series
Category	Measuring Instruments
Language	English