User Guide

Remote Control User Guide for the MX / MBX / TLX1 / TLX2 Series Chapter 2: Supported Commands
Rev. E, May 5, 2022 Page 9
Command Syntax Description
Get Optical Laser
Frequency
LASer:FREQuency? Returns a floating point value with unit of GHz. The
reported optical laser frequency, which is determined by
the ITU channel (LAS:CHAN:N) and fine offset
(LAS:FINE:N). As the resolution of the returned value is
limited to 0.1 GHz (100 MHz), the values of the
intermediate frequencies set using the fine-tuning feature
are reported rounded to the nearest 0.1 GHz.
Get Nominal
Laser Frequency
LASer:FREQ_NOMinal? Returns a positive integer for the calculated frequency,
generated from the nominal frequency of the ITU channel,
with the current fine-tuning frequency offset added or
subtracted. This value is in units of MHz. This is the same
value that is displayed on the LCD GUI laser settings page.
Note that it is derived from the requested frequency and
does not represent a live measurement.
Get Reported
Optical Output
Power (OOP)
LASer:OOP? Returns a floating point value with units of dBm. This value
corresponds to the optical output power from the laser
module measured by an integrated photodiode. A typical
operating value is 13.5 dBm. This is a different
measurement than the one reported in response to the
LAS:TAP:DBM? command, which measures the
downstream optical power via optical tap. The two
measurements may differ slightly. Optical output power will
be unstable during laser warm-up and frequency tuning.
Set Laser Power
On
LASer:POWer: 1 Sets the laser power to “on” and returns 1 on receipt of
command. To ensure optimal stability and full optical output
power, allow the laser to warm up for 15 minutes after
powering on.
Set Laser Power
Off
LASer:POWer: 0 Sets the laser power to “off” and returns 1 on receipt of
command.
Get Laser Power
Status
LASer:POWer?
Returns 0 if the laser power is set to “off” and 1 if the laser
power is set to “on.” This command returns the most recent
requested power state, which may differ from the laser’s
currently active power state. The LAS:SET? command can
be used to verify the last requested power state is active.
Additional laser status and setpoint information can be
obtained using:
LAS:SET?
LAS:OOP?
LAS:TAP:DBM?
LAS:TAP:MW?
Select C-band
Laser
LASer:SELect: Cband
Selects the C-Band laser and returns 1 on receipt of
command. This command is not available for instruments
with a sin
g
le laser.
Select L-band
Laser
LASer:SELect: Lband
Selects the L-Band laser and returns 1 on receipt of
command. This command is not available for instruments
with a sin
g
le laser.
Select 1310nm
Laser
LASer:SELect: 1310
Selects the fixed 1310nm laser and returns 1 on receipt of
command. This command is not available for instruments
with a sin
g
le laser.
Get Selected
Laser
LASer:SELect?
Returns a string corresponding to the currently selected
laser.