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