Giga-tronics 2508A, Operation Manual

Page: 32 / 132

Chapter 2: Front Panel Operation
32 2500A Series Operation Manual, 34172 Revision C, March 2008
Figure 2-7: Ramp Freq Menu with Interactive Softkeys
The following explains each item in the Ramp Freq menu:
Start Frequency. This menu item displays and allows you to modify the ramp start frequency. This is
the frequency that will be used as the starting frequency of the frequency sweep. Note that the start fre-
quency must be less than the stop frequency. If the start frequency is set higher than the stop frequency,
the stop frequency is automatically adjusted to the same value.
Stop Frequency. This menu item displays and allows you to modify the ramp stop frequency. This is the
frequency that will be used as the ending frequency of the frequency sweep. Note that the stop frequency
must be greater than the start frequency. If it is set lower than the start frequency, the start frequency is
automatically adjusted to the same value.
Power. This menu item displays and allows you to modify the output power level to be used during the
frequency sweep. The range of the power level depends on the following configuration and settings of
the instrument:
Sweep Time. This menu item allows you to view and modify the sweep time. This is the amount of time
that elapses for one cycle of a frequency sweep to complete.
Resolution. This menu item allows you to view and modify the sweep step resolution. The sweep step
resolution can be set to 401, 801 and 1601 frequency steps.
Ramp Freq 2 Menu. Pressing this softkey invokes the Ramp Freq 2 menu (Center/Span Frequency)
menu in the display.
2.3.3.2 Ramp Freq 2 Menu
The Ramp Freq 2 Menu will generate a ramp frequency sweep where the center frequency and sweep
span paramters are specified. The menu allows you to view and modify settings related to the instru-
ment’s frequency sweep features. When this menu is used, the frequency of the RF output can be swept
linearly referenced from the center frequency with a predetermined span frequency in a predetermined
sweep time.
Figure 2-8 shows the Ramp Freq Start/Stop menu:
Figure 2-8: Center/Span Ramp Freq Menu with Interactive Softkeys
RAMP FREQ 2
10.00 MHz
20.0 GHz
0.00 dBm
1.00 Sec
Center Freq
Span
Sweep Time
Power
Ramp Power
Menu
Ramp Sweeping
Resolution
401