Agilent Technologies E4438C Specifications for I/Q Characteristics, Modulation bandwidth, Inputs

Specifications for I/Q Characteristics

I/Q modulation bandwidth I/Q inputs

Input impedance	50 Ω or 600 Ω
Full scale input 1	√ I2 + Q2 = 0.5 Vrms

I/Q bandwidth using external I/Q source (ALC off) 2

	3.00		850 MHz carrier
	1.00
	-1.00
	-3.00		1900 MHz carrier
[dB]	-5.00				2200 MHz carrier
		1800 MHz carrier
	-7.00
	-9.00
	-11.00
	-13.00
	-15.00
	-150	-100	-50	0	50	100	150

Frequency offset from carrier [MHz]

I/Q bandwidth using internal I/Q source (Options 001, 002, 601, 602)
	3.00
	1.00
	-1.00
	-3.00
[dB]	-5.00
	-7.00				850 MHz
	-9.00				1800 MHz
	-11.00				1900 MHz
					2200 MHz
	-13.00				5700 MHz
	-15.00
	-50	-30	-10	10	30	50

Frequency offset from carrier [MHz]

1.The optimum I/Q input level is √ I2+Q2 = 0.5 Vrms, I/Q drive level affects EVM, origin offset, spectral regrowth, and noise floor. Typically, level accuracy with ALC on will be maintained with drive levels between 0.25 and 1.0 Vrms.

2.Parentheses denote typical performance.

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