Trigger I/O Connector - Fluke 96000 Series Operator's Manual

96000 Series
Operators Manual
The 300 MHz Frequency Counter Connector is isolated unless the
frequency counter is selected. When the frequency counter is
selected the connector shell is connected to the instrument RF
Common. This behavior is different to the 50 MHz Frequency
Counter, Modulation, Leveling, and Frequency Pull Input Connector
which has its shell connected to RF Common at all times.
The 50 MHz Frequency Counter, Modulation, Leveling, and
Frequency Pull Input Connector does not support frequency counter
functionality in the 96270A.
Connections to the 300 MHz Counter Connector will often be from a
grounded source (for example a Spectrum Analyzer or Power
Meter). When the 300 MHz Counter is selected, such a connection
will ground the RF common and hence the RF output of the
Instrument and the RF inputs of any connected power sensors. In
this circumstance, common-mode noise or ground loops may
degrade performance at very low levels.

Trigger I/O Connector

The Trigger I/O (input/output) connector is a rear-panel BNC connection that is
configurable as either an input or an output for sweep trigger signals, and as
an output for modulation trigger signals. In either case, this port is TTL
compatible. Sweep trigger input and output specifications for the port are
shown in Tables 3-10 and 3-11, respectively. Modulation trigger output
specifications are shown in Table 3-12.
I/O connections to the Trigger I/O connector are often grounded (for
example, Oscilloscope or Spectrum Analyzer). Such connection will
ground the RF Common and hence the RF Output of the Instrument.
In this circumstance, common-mode noise or ground loops may
degrade performance at very low output levels.
3-30
Note
Note
Note
Note