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Quick Reference Guide
Math functions
The Model 2520 has built-in math functions to calculate conductance, resistance, MX + B,
power, and delta. Conductance, resistance, and power are available only for laser diode
voltage measurements. MX + B is available for all three measurement functions (laser
diode voltage and both detector current measurements). Delta is available only via remote.
Conductance
This math function computes the conductance from the ratio between the laser diode
current source value and the measured voltage:
Conductance
= I
L
/V
L
where:
I
L
= laser diode source current
V
L
= measured laser diode voltage
Press CONFIG > press MATH> select CHANNEL1 > select I/V.
Press MATH. The laser diode measurement field on the bottom line will display
conductance.
Resistance
This math function computes the resistance using the ratio between the measured laser
diode voltage and the source current:
Resistance
= V
L
/I
L
where:
V
L
= laser diode voltage measurement
I
L
= laser diode source current
Press CONFIG > press MATH > select CHANNEL1 > select V/I.
Press MATH. The laser diode measurement field on the bottom line will display
resistance.
Power
This math function calculates power using the measured voltage and source current values
as follows:
Power
= V
L
×
I
L
where:
V
L
= laser diode voltage measurement
I
L
= laser diode source current
Press CONFIG > press MATH > select CHANNEL1 > select P.
Press MATH. The laser diode measurement field on the bottom line will display power.
