10 MHZ PRECISION REFERENCE. (Option
lD5)
This output is connected
to the EXT REF (described above) to improve the frequency accuracy of the
analyzer.
AUX
INPUT. This allows for a dc or ac voltage input from an external signal
source, such as a detector or function generator, which you can then measure,
using the S-parameter menu. (You can also use this connector as an analog
output in service routines.)
EXT
AM. This allows for an external analog signal input that is applied to the
ALC circuitry of the analyzer’s source. This input analog signal amplitude
modulates the RF output signal.
EXT
TRIG. This allows connection of an external negative
TI’L-compatible
signal that will trigger a measurement sweep. The trigger can be set to
external through softkey functions.
TEST SEQ.
This outputs a
TI’L
signal that can be programmed in a test
sequence to be high or low, or pulse (10
pseconds)
high or low at the end of a
sweep for a robotic part handler interface.
LIMIT
TEST.
This outputs a
TI’L
signal of the limit test results as follows:
Pass:
TrLhigh
Fail:
TrLlow
VGA
OUTPUT. This provides a video output of the analyzer display that is
capable of
running a PC VGA monitor.
Theory of Operation
12-13
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