TDT RZ2, Manual, Page: 549 / 736

System 3 14-5
PA5 Programmable Attenuator
For a definition of each menu item:
• Turn the Select knob until the name of the menu appears on the display,
then press and hold down the Select knob. A description of the menu
function will scroll across the display.
To exit a menu without changing settings:
• Press and release the ESC button.
Operation in Atten Mode
In
Atten
mode, the user sets the desired level of attenuation with the Select knob.
When the unit is powered on, it defaults to the Atten mode with 0.0 dB of
attenuation.
To use Atten mode:
• Turn the Select knob until
Atten
appears on the display, then press and
release the Select knob.
A small letter "A" appears in the upper left corner of the display, indicating
the unit is in
Atten
mode, and a decibel reading appears on the right side
of the display. See “PA5 Display Icons” on page 14-12, for more informa-
tion.
• Turn the Select knob to adjust attenuation in 0.1 dB increments.
Operation in UserAtt Mode
In
UserAtt
mode, the user can adjust the attenuation level of the signal using user-
programmed parameters available in the
UserOps
menu. Users can also save
common parameter configurations in the PA5's nonvolatile memory. See “Using Preset
Configurations” on page 14-10, for more information.
To use
UserAtt
mode:
1. Turn the Select knob until
UserAtt
appears on the display, then press and
release the Select knob.
A small letter "U" appears in the upper left corner of the display, indicating
the unit is in
UserAtten
mode, and a decibel reading appears on the right
side of the display. See “PA5 Display Icons” on page 14-12, for more
information.
2. Turn the Select knob to adjust attenuation according the current user
programmable parameters (available in the
UserOps
menu). The default
settings include a step size of 3.0 dB and dynamic update mode.
Note: When the Update attenuation parameter is set to Manual, the intensity
of the display will dim as the user turns the knob—this indicates that the
changes have not been applied to the output signal. The user must press
and release the Select knob to apply attenuation changes to the output
signal.
To access the UserOps menu:
1. Turn the Select knob until UserOps appears on the display.
2. Press and release the Select knob.
3. Set the
UserOps
parameters as desired.
To set parameters such as step size (StpSize), update mode (Update),
minimum attenuation (AbsMin), base attenuation (BaseAtt), and reference
value (Refrnce); turn the Select knob to the desired value and then press
and release to save changes.