External Burst Envelope; Composite Modulation; Simultaneous Modulation - Agilent Technologies E4438C Datasheet

Specifications for Analog Modulation

External burst envelope

Composite modulation

Simultaneous modulation

1. Parentheses denote typical performance.
16
Input voltage
RF On
RF Off
Linear control range
1
On/off ratio
Condition: V below –1.05 V
in
1
Rise/fall time
Condition: With rectangular input
Minimum burst repetition frequency
ALC on
ALC off
Input port
Input impedance
AM, FM, and FM 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.
0 V
–1.0 V
0 to –1 V
≤ 4 GHz
> 75 dB
> 4 GHz (> 64 dB)
(< 2 µs)
1
(10 Hz)
DC
External 1
50 Ω, nominal