Agilent Technologies E4438C Specifications for Analog Modulations, Phase modulation 1, Standard

Specifications for Analog Modulations

Phase modulation 1, 2	Resolution	0.1% of set deviation
	Modulation frequency response 3, 4
	Standard

		Maximum	Allowable rates [3 dB BW]
	Mode	deviation	FM path 1	FM path 2
	Normal BW	N x 80 rad	DC to 100 kHz	DC to 100 kHz
	High BW6	N x 8 rad	(DC to 1 MHz)	(DC to 0.9 MHz)
		N x 1.6 rad	(DC to 10 MHz)	(DC to 0.9 MHz)
With Option UNJ
		Maximum	Allowable rates [3 dB BW]
	Mode	deviation	FM path 1	FM path 2
	Normal BW	N x 10 radians	DC to 100 kHz	DC to 100 kHz
	High BW	N x 1 radians	(DC to 1 MHz)	(DC to 0.9 MHz)

Deviation accuracy [1 kHz rate, Normal BW mode]

< ±5% of deviation + 0.01 radians

Distortion3 [1 kHz rate, deviation < 80 radians on standard model, < 10 N radians on Option UNJ models, Normal BW mode]

< 1%

FM using external inputs 1 or 2

Sensitivity	1 Vpeak for indicated deviation
Input impedance	50 Ω, nominal
Paths	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. FM path 2 must be set to a deviation less than the FM
	path 1.

Amplitude modulation 1, 6	Range	0 to 100%
[fc > 500 kHz]	Resolution	0.1%
	Rates [3 dB bandwidth]
	DC coupled	0 to 10 kHz
	AC coupled	10 Hz to 10 kHz
	Accuracy 4, 7	1 kHz rate < ±(6% of setting +1%)
	Distortion 4, 7 [1 kHz rate, THD]
	Option 501-504/Option UNJ		Option 506
	30% AM	< 1.5%	< 1.5%
	90% AM	(< 4%)	(< 5%)
	AM using external inputs 1 or 2
	Sensitivity	1 Vpeak to achieve indicated depth
	Input impedance	50 Ω, nominal
	Paths	AM path 1 and AM path 2 are summed internally for
		composite modulation.

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 page 12 for N.

4.Parentheses denote typical performance.

5.Bandwidth is automatically selected based on deviation.

6.AM is typical above 3 GHz or if wideband AM or I/Q modulation is simultaneously enabled.

7.Peak envelope power of AM must be 3 dB less than maximum output power below 250 MHz.

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