Giga-tronics 2500B Series Microwave Signal Generators
CW Operation
Operation Manual, Part Number 34737, Rev C, June 30, 2011
Page 23
Table 13: CW Menu
CW Menu
Parameter
Description
Frequency
The instrument’s center frequency. The range of the center frequency is dependent on the
model number and options of the instrument.
Power
The output power level of the selected frequency. The range of the output power level
also depends on the Power Offset and Power Slope settings in the CW menu, as well as
other settings of the instrument.
Power Offset
The Power Offset feature increases the instrument’s output power by the amount of the
Power Offset setting, without changing the Power level as shown in the display. This allows
you to compensate for the insertion or conversion loss of components that are attached to
the instrument’s RF output. An example is shown in Figure 8.
Figure 8: Power Offset Example
The Power Offset indicator (
OFS
) appears in the upper right-hand corner of the display
when any power offset value greater than 0.00 dB is entered.
Power Slope
The power slope feature increases the instrument’s output power linearly as a function of
the output frequency. The power slope function allows you to automatically compensate
for insertion/conversion losses of components attached to the instrument’s RF output that
exhibit a linear loss characteristic with frequency. The Power Slope indicator (
SLP
) appears
in the upper right-hand corner of the display when the power slope is greater than 0.00
dB/GHz.
Phase Adjust
This menu item displays and allows you to modify the phase of the output signal. Note the
following:
The phase of the signal is maintained until the phase is readjusted or whenever the
instrument frequency setting is changed.
When the instrument frequency setting is changed, the phase adjust setting is reset to
0 degrees.
Phase Adjust is specified for a minimum frequency range of 500 MHz to the maximum
frequency range of the instrument. Phase adjust is available for frequencies below 500
MHz, however the output response time of the phase adjust is decreased.
