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 , 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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Agilent Technologies E4438C manual Specifications for Analog Modulation, Resolution, FM using external inputs 1 or