Agilent Technologies ESG User Manual download pdf (Page 16)

Speciﬁcations for Analog Modulation

Input voltage

RF on

RF off

Linear control

range

0 V

–1.0 V

0 to –1 V

On/off ratio

Condition: V

below –1.05 V

≤ 4 GHz

> 4 GHz

> 75 dB

(> 64 dB)

Rise/fall time

Condition: With rectangular input

(< 2 µs)

Minimum burst repetition frequency

ALC on

ALC off

(10 Hz)

Input port External 1

Input impedance 50 Ω, nominal

AM, FM, and ΦM each consist of two modulation paths which are summed

internally for composite modulation. The modulation sources may be any two

of the following: Internal, External 1, External 2.

Multiple modulation types may be simultaneously enabled. For example,

W-CDMA, AM, and FM can run concurrently and all will affect the output RF.

This is useful for simulating signal impairments. There are some exceptions:

FM and FM cannot be combined; AM and Burst envelope cannot be combined;

Wideband AM and internal I/Q cannot be combined. Two modulation types

cannot be generated simultaneously by the same modulation source.

External burst envelope

Composite modulation

Simultaneous modulation

1. Parentheses denote typical performance.

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Agilent Technologies ESG User Manual Page 16