Agilent Technologies 4395A - Page 241

Measuring
the
Carrier
to Noise
Ratio
Level
Mode.
The level
mode
allows
the
external
trigger
signal
to
open
and
close
the
gate
directly
, without
a
programmed
gate
length.
The
level
mode
also
provides
the
gate
delay.
For
the
level mode
,
the
gate
sweep
is
controlled
by
the
following
factors:
Trigger
polarity,
which
selects
the
polarity
of
TTL
the
level
(+5
V
or
0V)
to open
gate.
Gate
Delay,
which
determines
how
long
after
the
trigger
signal
the
gate
becomes
active.
Figure
8-22.
Level
Mode
Analyzing the Measurement Results 8-39