Anritsu ML2430A operation manual Select OFF, LOW, MEDIUM, or HIGH, Low Level Averaging

SENSOR MENU OPERATION

NOTE

GPIB trigger com- mands automatically apply REPEAT averag- ing after TR2 com- mands to ensure ‘old’ samples are excluded from the measurement. However, the user should be aware that due to the high speed of the meter, other in- struments in the ATE system may not be set- tled.

REPEAT averaging also allows the user to manually select the amount of averaging regardless of the signal level, however the dis- play is updated only when the NUMBER of readings specified have been taken (1-512).

NOTE

	Due to the nature of this method of operation, if the power
	level changes between updates, the display update will not
	reflect the true input power for one measurement only.
	When a channel is set to a ratio, e.g., A–B or A/B etc., the
	repeat method described above only operates if all sensors
	are set to the REPEAT mode.
LOW	Select OFF, LOW, MEDIUM, or HIGH, Low Level Averaging, in
LEVEL	Power vs. Time or Readout modes. Sets the low level averaging
[AVGLL]	window for the sensor. At resolution settings of 0.01 and 0.001 dB,
	digital readouts may flicker due to the high reading rate of the
	power meter. Low level averaging applies a low pass filter to post-
	average data readings to achieve a more stable front panel display
	without slowing down the response of the meter to larger changes
	in level. The three windows for LOW, MEDIUM and HIGH low level
	averaging are ± 0.01, 0.02, and 0.05 dB.
	For example: When a LOW setting of low level averaging is applied
	while stepping from 0 dBm to –1 dBm, the meter displays the final
	reading within 0.01 dB with no delay. The final settling of 0.01 dB
	will settle over a short subsequent period of time, leading to a sta-
	ble high resolution readout.
	With a HIGH setting of low level averaging, the settling window is
	increased (up to approximately 0.05 dB) and the settling time is
	longer.
	With low level averaging OFF, the meter displays the final reading
	instantly with no further settling observed. Any jitter due to noise is
	reflected in the displayed reading, which may be inconvenient for
	high resolution readings.

In Profile and Source sweep modes, the following soft keys appear:

STATE	Graph averaging state, ON or OFF. When set to ON, the following
[GRSWS]	additional soft keys appear:
	A NUMBER [GRSWP]
	B NUMBER (ML2438A only) [GRSWP]
	Sweep averaging number (1 to 512).

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