Agilent Technologies 8156A manual Warmup. The multimeter needs around 20 minutes to warmup

	Using the Attenuator
	Example, Setting the Calibration
NO T E	Under normal circumstances you should leave the instruments to
	warmup. (The multimeter needs around 20 minutes to warmup. The
	attenuator needs around 45 minutes with the shutter open to warmup.)
	Warming up is necessary for accuracy of the sensor, and the output
	power of the source.
	d. Connect a patchcord from the source to the input of the
	sensor.
	2. Measure the insertion loss of the Hardware setup:
	a. On the multimeter:
	i. Set the wavelength for the sensor to that of the source.
	ii. Activate the source, by pressing the gray button on its
	front panel.
	iii. Start the loss application (press MODE and then LOSS,
	and EXEC).
	b. Reconfigure the hardware to include the attenuator:
	i. Disconnect the source from the sensor, and connect it to
	the input of the attenuator.
Figure 2-6	Hardware Configuration for Attenuation Example - B

ii.Connect a patchcord from the output of the attenuator to the sensor.

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