INTRODUCTION AND SPECIFICATIONS
1-9.
REMOTE-CONTROL
PROGRAMMING
The Option
-488
IEEE-488
Interface
allows the Generator
to be remotely controlled with
any IEEE-488
bus controller. The instrument
can also be used on the 1EEE“488
bus
without
a
controller
in a listen-only
or talk-only mode by selecting the
appropriate
Generator rear panel IEEE-488 switch
settings.
All instrument controls can
be remotely
controlled except
the POWER ON
/
OFF and the
rear panel REF
INT/EXT
switches. The
Option
-488
IEEE-488 Interface
provides
additional
commands
not available with
local control, such
as
data transfer and
individual control of internal
I/O control
bits.
The Option -488
IEEE’488
Interface allows
two Generators to track
amplitude,
frequency, or
modulation
in a master/ slave
configuration
when using the
front panel
step-up and
step-down
entries on one of
the
instruments. For
instance,
frequency
tracking
is convenient
for tests involving
mixers,
and amplitude tracking
is useful for two-
tone intermodulation
testing.
1-10-
Frequency
The
specified
frequency range
is 0.01 to 1050 MHz. The
frequency
is synthesized from a
10-MHz
reference
and provides an
output resolution of 10
Hz
over the
entire
frequency
range. The
relative
frequency mode allows
the
frequency to be programmed
in
relation
to
a center
frequency
or
an
offset
frequency.
This is
convenient
for testing
filters
and mixers.
The output
frequency
stability and accuracy
depends on the reference, whether
that
reference
is internal or
external.
1-11,
Reference
The internal
frequency
reference is a
10-MHz ambient crystal oscillator. If Option
-130
High
Stability Reference or
the
option
-132
Medium Stability Reference
is installed, that
oscillator
is locked
to the internal
crystal
oscillator. With the rear panel REF INT/
EXT
switch set to INT,
the
Generator output frequency
is synthesized from the internal
10“MHz crystal oscillator
reference, and the internal
oscillator
(timebase) signal is
available
at the 10 MHz
OUT connector.
The Generator
can be operated from an
external
10-MHz timebase by setting the rear
panel REF INT/EXT
switch to EXT and applying a
timebase
signal to the REF IN
connector.
With the
REF INT/EXT switch set
to
EXT, the Generator can be operated from an
external 1-,
2-, 2.5-,
5-, or 10-MHz, 0.3V to 4V
peak-to-peak
sine or square-wave
reference
applied to the REF IN connector.
In either position of the INT/EXT switch,
the selected reference
is available as a lO-MHz signal at the
rear
panel 10 MHz OUT
connector.
1-12.
Amplitude
The
Generator has a specified
signal level range from +13 to
-127
dBm with
programming
limits of
+19
and
-147.4
dBm. This
corresponds
to specified terminated voltages of IV to
0.1
/xV and limits
of
2V
to
0.01
/iV, respectively.
The maximum usable signal level is
approximately +15
dBm.
The level entry can be in dBm or volts, or it can
be converted
from one
to
the other. In addition, the relative
amplitude mode allows you to account for
cascaded gain or loss, or
to
display the level (in dB) relative
to
1 mV
or 1 mV.
1-13.
Modulation
Both internal and external
amplitude
modulation and
frequency modulation capability is
available. The internal
modulation oscillator
is
selectable between
400
Hz and
1000
Hz.
1-3
To Next Page
Loading...