HP Saw E4419B manual Setting Measurement Limits, Setting Channel Limits

Power Meter Operation

Setting Measurement Limits

Setting Measurement Limits

You can configure the power meter to detect when a measurement is outwith a predefined upper and/or lower limit value.

	There are two types of measurement limits you can set:
	• Channel Limits - are applied to the specified input channel and
	are for power measurements only.
	• Window Limits - are windows based (upper and lower) and can be
	applied to power, ratio or difference measurements. In addition,
	the window based limits can be set to output a TTL logic level at
	the rear panel Rmt I/O port when the predefined limits are
	exceeded.
Note	Only one set of limits can be on at a time, that is, Channel OR
	Window.

Setting Channel Limits

The power meter can be configured to verify the power being measured against an upper and/or lower limit value. The range of values that can be set for upper and lower limits is -150 dBm to 230 dBm. The default upper limit is 90.00 dBm and the default lower limit is -90.00 dBm.

To set the limits:

1.	Press		System		,				,		. The current
							A Input Settings			Limits
			Inputs
	setting of the maximum and minimum limits are displayed under
	the			and				softkeys respectively.
		Max				Min
2.	To change either of these settings press the appropriate softkey.
	The power meter displays the current value in a pop up window.
	Modify this value (see below) until the desired value is displayed.
	■	Use			or			to modify the digit on which the cursor is
		currently positioned.
	■	Use			or			to move to other digits.
3.	To confirm your choice press the appropriate measurement units.

Limits can be disabled and re-enabled simply by pressing

Limits Off On .

A typical application for this feature is shown in Figure 2-11.

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