HP 8153A - Running the Loss Application

Running the Loss Application
After pressing [lossI the instrument checks to see if both a source and sensor
module are present. If one or both are missing the character field shows the
message CONFIG ?. The instrument does not enter the loss application.
If both modules are present:
■ The sensor wavelength is automatically set to the wavelength of the source.
(When you stop the application running, the parameters for the sensor are
automatically reset to the values in use before you started the application.)
■ The operation-indicator shows APPL, this stays lit while the instrument is in
the loss application.
■ The instrument shows LOSS in the character field.
The instrument reads the reference level when you start the application
running. To read the input signal and use it as the reference, do the following:
1. Make sure that the device under test is not in the system.
2. Make sure that the source is not active. The source is active whenever the
green LED on its front panel lights.
3. Connect the source to the input of the system without the device under test.
4. Connect the output of the system to the sensor.
Figure 3-1. Measuring the Reference for the Loss Application
5. P ress
The instrument takes the reference and then runs the application. While the
application is running, the RUN operation-indicator lights.
Local Control • Menu Mode 3-3