Giga-tronics 2508B, Operation Manual

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System Menus Giga-tronics 2500B Series Microwave Signal Generators
Page 76 Operation Manual, Part Number 34737, Rev C, June 30, 2011
Table 31: System Menus
System Menus
Submenu Action or Parameter
Figure 38: System Menu
System Menu
(see Figure 38)
Attenuation Provides control of the step attenuator if it is installed in the instrument.
The step attenuator option can insert up to 90 dB of attenuation (110 dB with option
27) into the RF output path of the instrument.
It is switchable in 10 dB steps
Can be set to automatically switch as the instrument’s power level is varied, or it can
be manually set to insert a fixed amount of attenuation.
ALC Leveling This menu item allows you to set the instrument's ALC input. The ALC input
settings are;
Internal
Positive Detector
Negative Detector
Power Meter.
External ALC enables the instrument to compensate for device transmission losses
without user intervention.
External Tune Input This function allows you to tune the output frequency of the 2500B
over a range of approximately 20 ppm (2 ppm with option 28) using an analog tuning
voltage of 0 to +10 Volts applied to the Ref Tune input on the rear panel. Pressing this
softkey enables and disables this feature.