Specifications

18
The E8257C has a low frequency
(LF) output. The LF output’s source
can be switched between an internal
modulation source (internal monitor
1 or 2) or an internal function gen-
erator (function generator 1 or 2).
Using internal monitor 1 or 2 as
the LF output source, the LF output
provides a replica of the signal from
either internal source (1 or 2) that is
being used to modulate the RF out-
put. The specific modulation param-
eters for this signal are configured
through the AM, FM, or
ΦM menus.
Using function generator 1 or 2 as
the LF output source, the function
generator section of the internal
modulation source (1 or 2) drive the
LO output directly. frequency and
waveform are configured from the
LF output menu, not through the
AM, FM, or
ΦM menus. You can
select the waveform shape from
the following choices:
Sine
sine wave with adjustable amplitude
and frequency
Dual-Sine
dual sine waves with individually
adjustable frequencies and a per-
cent-of- peak-amplitude setting for
the second tone (available from
function generator 1 only)
Swept-Sine
a swept sine wave with adjustable
start and stop frequencies, sweep
time, and sweep trigger settings
(available from function generator 1
only)
Triangle
triangle wave with adjustable
amplitude and frequency
Ramp
ramp with adjustable amplitude
and frequency
Square
square wave with adjustable
amplitude and frequency
Noise
noise, in a uniform or Gaussian dis-
tribution, with adjustable amplitude
generated as a peak-to-peak value
(RMS value is approximately 80% of
the displayed value)
DC
direct current with adjustable
amplitude
NOTE The {LF Out Off On} softkey
controls the operating state of the
LF output when the LF output
source is set to function generator 1
or 2. The {Mod On/Off} softkey
controls the operating state of the
LF OUTPUT connector when the
LF output source is set to internal
monitor 1 or 2.
The {RF On/Off} softkey does not
apply to the LF OUTPUT connector.
Part 3: Configuring the LF Output
(E8257C Only)