Page 10 · 685 Series
ComboPak
User’s Manua
l
Menu
Description
Factory
Default
Computer
Command
Vf limit
This setting controls the maximum
amount of forward voltage that can
be delivered to the laser diode. This
limit is implemented in hardware for
immediate response. For more
information about limits, Using the
Laser Limits
and Software Limits
below.
Maximum
LAS:LIM:LDV
Cable R
The cable resistance, in ohms. This
setting can be used to compensate
for voltage losses in the cable due
to cable and connector resistances.
Cable R
is ignored in Vf (AVC)
Mode.
For more information about
this feature, see
Compensating for
Voltage Loss
below.
0.0000 Ω
LAS:CABLER
PD Resp
This factor is used by the unit to
convert from monitor photodiode
current into optical power. The
value is in terms of microamps per
milliwatt (
μ
A/mW), such that power
= photodiode current divided by
the factor.
0.00
μ
A/mW
LAS:CALPD
Tol Time
Tolerance time is the amount of
time, in seconds, that the measured
value (current, voltage, etc.) must
be within the set point +/- the
tolerance for the unit to be
considered in tolerance. In Io
modes, the tolerance is defined by
Tol Io
. For Im/Po modes, the
tolerance is fixed at 50uA. For Vf
mode, the tolerance is fixed at
50mV.
5 seconds
LAS:TOL
Tol Io
Tolerance current is a band (in mA)
around the set point. When the
actual current is within this band for
longer than the Tol Time setting,
then the unit is considered to be in
tolerance.
10.0mA
LAS:TOL
On Delay
The delay, from the time the output
is turned on with the LAS:OUTPUT
command or the analog interface to
when the output is actually
energized.
3000ms
ONDELAY