Agilent Technologies E4438C manual Amplitude dBm

Specifications for Frequency and Power Characteristics

ALC offset error (dB)

						Linearity
			CW or GSM, 850 MHz, attenuator hold On, ALC On
0.3
0.25						Typical STD unit
0.2						Typical Option UNB unit
						Typical Option 506 unit
0.15						Lower limit
0.1						Upper limit
0.05
0
-0.05
-0.1
-0.15
-0.2
-0.25							Limit is undefined above 13 dBM
-0.3							for STD units. Limit line applies
-0.35							only to UNB and 506 units.
-0.4
-10	-8	-6	-4	-2	0	2	4	6	8	10	12	14	16
						Amplitude (dBm)

Linearity measures the accuracy of small changes while the attenuator is held in a steady state (to avoid power glitches). This is useful for fine resolution changes.1

Linearity	Linearity
CW or GSM, 1900 MHz, attenuator hold On, ALC On	W-CDMA 2200 MHz, attenuator hold On, ALC On

	0.3														0.3
	0.25					Typical STD unit									0.25
	0.2					Typical Option 506 unit									0.2
						Typical Option UNB unit
	0.15					Lower limit									0.15
	0.1					Upper limit									0.1
(dB)														(dB)
	0.05														0.05
error														error
	0														0
offset														offset
	-0.05														-0.05
ALC	-0.1													ALC	-0.1
	-0.15														-0.15
	-0.2														-0.2
	-0.25														-0.25
	-0.3														-0.3
	-10	-8	-6	-4	-2	0	2	4	6	8	10	12	14	16

					Typical STD unit
					Typical Option UNB unit
					Typical Option 506 unit
					Lower limit
					Upper limit
-10	-8	-6	-4	-2	0	2	4	6	8

Amplitude (dBm)Amplitude (dBm)

Linearity	Linearity
CW or GSM 5750 MHz, attenuator hold On, ALC On	W-CDMA 5750 MHz, attenuator hold On, ALC On

	0.3											0.3
	0.25				Typical STD unit			Lower limit				0.25
					Lower STD deviation			Upper limit
	0.2				Upper STD deviation							0.2
	0.15											0.15
(dB)	0.1										(dB)	0.1
	0.05											0.05
error											error
	0											0
offset											Offset
	-0.05											-0.05
ALC	-0.1										ALC	-0.1
	-0.15											-0.15
	-0.2											-0.2
	-0.25											-0.25
	-0.3											-0.3
	-10	-8	-6	-4	-2	0	2	4	6	8	10

							Mean,Option 506 unit
							Lower STD deviation
							Upper STD deviation
							Lower limit
							Upper limit
-10	-8	-6	-4	-2	0	2	4	6	8

Amplitude (dBm) Amplitude (dBm)

1. Repeatability and relative level accuracy are typical for all frequency ranges.

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