Crosstalk - Stanford Research Systems SIM954 Operation And Service Manual

2.4 Crosstalk

2.4 Crosstalk

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Figure 2.5: SIM954 Crosstalk
SIM954 300 MHz Dual Inverting Driver Amplifier
The two channels of a SIM954 module are not shielded from each
other and exhibit crosstalk. Because of the geometric asymmetry of
the module, the output of Channel 1 is closer to the input of Chan-
nel 2 than vice versa. The crosstalk will generally be higher from
Channel 1 than Channel 2. This should be taken into account in
applications which require the least amount of interference between
the two channels. The worst crosstalk is caused by a resonance in
Channel 1 to 2 Crosstalk
Frequency [MHz]
Channel 2 to 1 Crosstalk
Frequency [MHz]
the module's power plane in conjunction with the operational ampli-
fier's diminishing common mode rejection ratio at high frequencies.
Since the frequency of this resonance is at approximately 385MHz,
it is well above the amplifier's guaranteed bandwith limit. Under
normal circumstances it should be of little concern.
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