Agilent Technologies E4438C manual Specifications for Analog Modulation, Resolution

Specifications for Analog Modulation

Frequency bands		Band	Frequency range	N number
	1		250 kHz to ≤ 250 MHz	1
	2		> 250 MHz to ≤ 500 MHz	0.5
	3		> 500 MHz to ≤ 1GHz	1
	4		> 1 to ≤ 2 GHz	2
	5		> 2 to ≤ 4 GHz	4
	6		> 4 to ≤ 6 GHz	8

Frequency modulation 1 , 2	Maximum deviation		3
				Standard	With Option UNJ
				N x 8 MHz	N x 1 MHz
	Resolution			0.1% of deviation or 1 Hz,
				whichever is greater
	Modulation frequency rate 4 [deviation = 100 kHz]
		Coupling		1 dB bandwidth		3 dB bandwidth
		FM path 1[DC]		DC to 100 kHz		(DC to 10 MHz)
		FM path 2 [DC]		DC to 100 kHz		(DC to 0.9 MHz)
		FM path 1 [AC]		20 Hz to 100 kHz		(5 Hz to 10 MHz)
		FM path 2 [AC]		20 Hz to 100 kHz		(5 Hz to 0.9 MHz)
	Deviation accuracy 3 [1 kHz rate, deviation < N x 100 kHz]
				< ± 3.5% of FM deviation + 20 Hz
	Carrier frequency accuracy relative to CW in DCFM3, 5
				±0.1% of set deviation + (N x 1 Hz)
	Distortion 3 [1 kHz rate, dev.= N x 100 kHz]
				< 1%
	FM using external inputs 1 or 2
		Sensitivity		1 Vpeak for indicated deviation
		Input impedance		50 Ω, nominal

FM path 1 and FM path 2 are summed internally for composite modulation. The FM 2 path is limited to a maximum rate of 1 MHz. The FM 2 path must be set to a deviation less than FM 1 path.

1.All analog performance above 4 GHz is typical.

2.For non-Option UNJ units, specifications apply in phase noise mode 2 [default].

3.Refer to frequency bands on this page to compute specifications.

4.Parentheses denote typical performance.

5.At the calibrated deviation and carrier frequency, within 5 °C of ambient temperature at time of calibration.

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