Step Size
When changing the FREQUENCY or LEVEL using the rotary control or
keys the size of
each step change will be that previously set on the Step Size menu. The default FREQUENCY
step is 10 MHz. The defaults for the two separate LEVEL step sizes are 10dB and 10mV; the
active LEVEL step size is the one currently displayed in the Step Size menu. Note that either
LEVEL step setting can be used with either LEVEL display mode; i.e. mV steps can be used in a
dB display and vice-versa. However, it will generally be most useful to use dB steps in a dB level
display and µV/mV steps in a µV/mV display.
To change the step size, select the STEP SIZE menu and move the
selection cursor to the
required parameter with the FIELD keys. Alternatively, because the cursor automatically points to
the step size of the most recently selected main menu parameter, pressing FREQUENCY
followed by STEP SIZE will set the
cursor to frequency step size and pressing LEVEL followed
by STEP SIZE will set the cursor to level step size.
FREQUENCY steps can be entered directly from the keyboard in kHz or MHz but will always be
displayed in MHz. The smallest step that can be set is 1kHz and this is the amount by which the
step is changed if the rotary control or
keys are used; large changes in step size are
therefore made most quickly by direct keyboard entry.
LEVEL steps can be entered directly from the keyboard in dB or µV/mV; separate step sizes are
stored for dB and µV/mV and the choice of units will determine which of the two LEVEL steps is
changed. The active LEVEL step size is the one currently displayed; pressing dB or µV/mV will
switch between the two without changing either. Note that mV values below 1.00mV will be
displayed in µV and µV values above 1000µV will be displayed in mV. The smallest step size that
can be set is 0.1dB or 0.01µV; when using the rotary control or
keys to set step size the
amount by which the step is changed is 0 .1dB for dB steps or 1 least significant digit for µV/mV
steps.
Having set the step size, return to the main menu by pressing FREQUENCY or LEVEL, etc.
Setting Frequency
Set the
cursor to FREQUENCY on the main menu by pressing the FREQUENCY key. The
generator frequency can then be set directly from the keyboard, in kHz or MHz, or changed using
the rotary control or
keys. Refer to Keyboard Principles for further information on keyboard
entries and to Step Size for setting the rotary control and
key increment size.
Note that when an increment would have taken the frequency above the instrument's maximum,
the setting becomes 1000 MHz. The next decrement returns the frequency to the last in-range
setting and further decrements decrease the frequency by the specified step size. Similarly when
a decrement would have taken the frequency below the instrument's minimum the setting
becomes 10 MHz and the next increment returns the frequency to the last in-range setting, etc.
Setting Level
Set the
cursor to LEVEL on the main menu by pressing the LEVEL key. The output level can
then be set directly from the keyboard, in dBm or µV/mV, or changed using the rotary control or
keys. Refer to Keyboard Principles for further information on keyboard entries and to Step
Size for setting the rotary control and
key increment size.
Note that when an increment would have taken the level above the instrument's maximum output
the setting b7dBm (or 500mV). The next decrement returns the level to the last in-range
setting and further decrements reduce the level by the specified step size. Similarly when a
decrement would have taken the level below the instrument's minimum the setting becomes
–127dBm (or 0.1µV) and the next increment returns the setting to the last in-range setting, etc.
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