Agilent Technologies 8163A Programming Manual page 118

Measurement Operations & Settings
command:
syntax:
description:
parameters:
response:
example:
affects:
command:
syntax:
description:
parameters:
response:
example:
affects:
command:
syntax:
description:
parameters:
N O T E
response:
example:
affects:
118
[:SOURce[n]][:CHANnel[m]]:AM:COHCtrl:COHLevel[l]
[:SOURce[n]][:CHANnel[m]]:AM:COHCtrl:COHLevel[l]<wsp><value>[MIN | MAX | DEF]
Sets the level of coherence, when using coherence control, on an arbitrary scale from 1 to
99.98%. 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.
The excursion level as a percentage of its maximum value.
Also allowed:
none
source2:am:cohc 50
DFB sources and Agilent 81980A, 81940A, 81989A, 81949A
[:SOURce[n]][:CHANnel[m]]:AM:COHCtrl:COHLevel[l]?
[:SOURce[n]][:CHANnel[m]]:AM:COHCtrl:COHLevel[l]<wsp><value>?[MIN | MAX | DEF]
Queries the current level of coherence, when using Coherence Control. Coherence is ex-
pressed on an arbitrary scale from 1 to 99.98%. A 100% coherence level corresponds to
maximum coherence length and minimum linewidth.
Optional
Returns the currently set excursion level as a percentage between 0 and 99.98
→
source2:am:cohc? 50<END>
DFB sources and Agilent 81980A, 81940A, 81989A, 81949A
[:SOURce[n]][:CHANnel[m]]:FM:SOURce[l]
[:SOURce[n]][:CHANnel[m]]:FM:SOURce[l]<wsp>SBSCtrl|0
Selects the type of the frequency modulation of the laser output.
Currently, only parameter strings that select SBS Control are valid.
Enable frequency modulation before issuing this command.
Refer to "[:SOURce[n]][:CHANnel[m]]:FM:STATe[l]" on page 119.
0, SBSCtrl
SBSCtrl (Simulated Brillouin Scattering) Control modulation suppresses SBS effects within
high-power measurement setups.
none
sour2:fm:sour SBSC
Agilent 81980A, 81940A, 81989A, 81949A compact tunable lasers.
Signal Generation – The SOURce Subsystem
MIN: minimum programmable value (0%)
MAX: maximum programmable value (100%)
DEF: default preset (*RST) value.
MIN: returns the minimum programmable value (0%)
MAX: returns the maximum programmable value (100%)
DEF: returns the default preset (*RST) value.
Simulated Brillouin Scattering
Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Fifth Edition