5
[:SOURce]:AM:STATe
Syntax
[
:SOURce
]
:AM:STATe
<
wsp
>
OFF
j
ON
j
0
j
1
Description
This command enables and disables amplitude modulation of the
laser output.
Set the state to
OFF
or
0
to disable modulation, set the state to
ON
or
1
to enable modulation. The default is for the modulation
to be disabled.
Modulation
Output
When the internal modulation is selected, the Modulation
Output on the front panel outputs a version of the modulating
signal that has the same frequency and phase as the modulating
signal, but has a xed, TTL-level amplitude.You can use this to
synchronize your external measuring equipment to the tunable
laser source.
To allow for your possible synchronization requirements,
there are two ways in which the signal can be output. Either
the signal is combined with the laser-ready signal, so that
the output is kept low when there is no optical signal being
output (for example, while the laser is settling after a change
of wavelength). Or the modulation signal is output all the
time. This is set by the
:SOURCE:MODOUT
command (see
\[:SOURCE]:MODOUT").
[:SOURce]:AM:STATe?
Syntax
[
:SOURce
]
:AM:STATe?
Description
The query returns the current state of modulation.
A returned value of
0
indicates that modulation is disabled. A
returned value of
1
indicates that modulation is enabled.
Example
OUTPUT 724;":AM:STAT ON"
OUTPUT 724;":AM:STAT?"
ENTER 724;A$
5-20 Remote Commands
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