TDT RZ2 Manual page 551

System 3
Command
Atten
UserAtt
UserOps
PA5 Top Level Menu
Description
Sets attenuation from 0.0 to 120.0 dB in 0.1 dB increments. The default
setting is 0.0 dB. When Atten is in use, the letter "A" appears on the left
side of the display, while the attenuation level appears on the right side of
the display.
Sets attenuation based on UserOps settings. Before use, attenuation
parameters must be set up via the UserOps sub-menus (see below). The
default setting is 0.0 dB. When UserAtt is in use, the letter "U" appears
on the left side of the display, while the attenuation level appears on the
right side of the display.
Access UserOps submenu
UserOps Sub-menu:
BaseAtt
Sets a fixed level of attenuation as a reference. The default setting is 0.0
dB and the range is 0 to 100.0 dB. When BaseAtt is set, a "+" symbol
appears on the left side of the display.
When used, the attenuation level displayed is relative to BaseAtt. For
example, with BaseAtt set to 60.0 dB, the attenuation level will be display
from -60.0 dB to 60.0 dB.
StpSize
Sets the increments of attenuation. The default setting is 3.0 dB, and the
range is 0.1 to 60.0dB.
Refrnce
Changes the display so it shows the output signal intensity rather than the
attenuation level. This function may be used only when the input signal
strength is known. When Refrnce is set, the letter "R" appears on the left
side of the display. The default setting is 0.0, and the range is ± 300.0.
For example, when Refrnce is set to 136 and the attenuation level set to
0.0 dB, the display shows 136.0. When the attenuation level is adjusted to
30.0 the display shows 106.
Update
Determines when attenuation is applied to the signal. When set to Dynamic,
attenuation is applied as the Select knob is turned. When set to Manual,
attenuation is applied after the Select knob is pressed and released. The
default setting is Dynamic.
Note that when Update is set to Manual, the attenuation level on the
display changes as the Select knob is turned, but the attenuation is not
applied to the signal until the Select knob is pressed and released. In this
mode, the intensity of the display dims to indicate that the attenuation has
not been applied to the signal.
MinAttn
Sets the minimum attenuation level for the UserAtt mode. This is used to
avoid signals that are too loud for the subject or equipment. The default
value is 0.0 dB and its range is 0.0 to 100.0 dB.
Note that setting this parameter limits the range of possible attenuation
levels. For example, when it is set to 30.0 dB, the range of attenuation is
30 db to 120 dB.
14-7
PA5 Programmable Attenuator