TDT RZ2 Manual page 552

14-8
Command
Load PS
Save PS
Reset
Setting Base Attenuation
When operating the PA5 manually in User Attenuation (UserAtt) mode, the Base
Attenuation (BaseAtt) parameter can be used to apply a fixed attenuation level to
the signal. Any additional attenuation to the signal is displayed relative to this base
level within a range of 0 to 120 dB. For example: if the BaseAtt is set to 6 dB,
when the user sets the attenuation to 3 dB the actual attenuation applied is 9 dB.
This feature can be used to calibrate a number of different experimental setups,
attenuating each by a different base attenuation so as to provide identical signal
levels when each is set to 0.0 dB UserAtt.
When this feature is in use, a "+" symbol is displayed on the left side of the
display. Note that the Base Attenuation and Reference parameters can be used
simultaneously. When both of these features are in use, the letter "R" and a "+"
symbol are displayed on the left side of the display. See "PA5 Display Icons" on
page 14-12, for more information.
To set the base attenuation:
1.
2. Access the
3. Press and release the Select knob.
4. Turn the Select knob until the display shows the desired level of
5. Press and release the Select knob. The level is saved and
PA5 Programmable Attenuator
Description
Loads one of four preset UserAtt configurations from non-volatile memory.
See Save PS (Below). The default is 1 and its range is 1 to 4.
Saves the current UserAtt configuration in one of four non-volatile memory
buffers. This permits the user to save commonly used UserAtt
configurations. The default is 1 and its range is 1 to 4.
To save a configuration, first ensure that all UserAtt parameters are set as
desired then turn the Select knob until the desired memory location is
displayed, and press the Select knob. Saving appears on the display. The
preset is ready of use.
Resets all menu items, including presets, to their default conditions.
Confirm
The user must confirm the reset by pressing and releasing the Select knob.
While the module is resetting, Reseting appears on the display.
The user must confirm the reset by pressing and releasing the Select knob.
While the module is resetting, Reseting appears on the display.
To exit without resetting, turn the Select knob until Cancel appears on the
display and then press and release the Select knob, or press the Esc
button.
Cancel
Cancels the reset.
UserAtt
Access the mode, by turning the Select knob until
on the display, then pressing and releasing the knob.
UserOps
menu, and turn the Select knob until
on the display.
attenuation.
on the display.
PA5 Top Level Menu
0.0 dB
appears on the display.
System 3
UserAtt
appears
BaseAtt
appears
BaseAtt
appears