Datasheet

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Mixed Domain Oscilloscopes
The optional MDO4TRIG application module provides
advanced RF triggering. This module enables the RF power
level on the spectrum analyzer to be used as a source for
Sequence, Pulse Width, Timeout, Runt, and Logic trigger
types. For example, you can trigger on a RF pulse of a specific
length or use the spectrum analyzer channel as an input to a
logic trigger, enabling the oscilloscope to trigger only when the
RF is on while other signals are active.
RF Measurements
The MDO4000C Series includes three automated RF
measurements – Channel Power, Adjacent Channel Power
Ratio, and Occupied Bandwidth. When one of these RF
measurements is activated, the oscilloscope automatically
turns on the Average spectrum trace and sets the detection
method to Average for optimal measurement results.
Automated Channel Power measurement
EMI Troubleshooting
EMC testing is expensive regardless of whether you purchase
the equipment to perform in-house testing or you pay an
external test facility to certify your product. And that assumes
that your product passes the first time. Multiple visits to a test
house can add significant cost and delay to your project. The
key to minimizing this expense is early identification and debug
of EMI issues. Traditionally, spectrum analyzers with near field
probe sets have been used to identify the location and ampli-
tude of offending frequencies, but their ability to determine the
cause of the issue is very limited. Designers are increasingly
using oscilloscopes and logic analyzers as EMI issues become
more transient due to the complex interactions of numerous
digital circuits in modern designs.
The MDO4000C, with its integrated oscilloscope, logic
analyzer, and spectrum analyzer is the ultimate tool for debug-
ging modern EMI issues. Many EMI problems are caused
from events rooted in the time domain, such as clocks, power
supplies, and serial data links. With its ability to provide
time correlated views of analog, digital, and RF signals, the
MDO4000C is the only instrument available that can discover
the connection between time-domain events and offending
spectral emissions.
RF Probing
Signal input methods on spectrum analyzers are typically
limited to cabled connections or antennas. But with the
optional TPA-N-VPI adapter, any active, 50 Ω TekVPI probe
can be used with the spectrum analyzer on the MDO4000C
Series. This enables additional flexibility when hunting for noise
sources and enables easier spectral analysis by using true
signal browsing on an RF input.
In addition, an optional preamplifier accessory assists in the
investigation of lower-amplitude signals. The TPA-N-PRE
preamplifier provides 12 dB nominal gain across the
9 kHz–6 GHz frequency range.
The optional TPA-N-VPI adapter enables any active, 50 Ω TekVPI probe to be con-
nected to the RF input.