R&S UP300/350
Generator
Operating Manual, 11/2007
6-105
E-1147.2759.00
6.2.1.2.4
Selecting the Type of the Level Range Switchover
Use
By selecting the level range switching mode, you determine how the output
voltage is to be adjusted at the output amplifier of the generator:
Auto
The internal signal paths are optimally driven; the output voltage is
always adjusted using the attenuators. This provides the best noise and
THD values for measurements with a constant level (e.g. THD+N
measurement).
Fixed
The signal path is adjusted to the specified maximum voltage. The actual
output voltage is adjusted only by scaling the digital values on the D/A
converter. This provides faster level changes and better settling.
Interference during switching operations is prevented but this may in
some cases have a negative effect on the signal-to-noise ratio.
Selecting
the channel
1.
Press the numeric keys
1
,
2
, or
3
to select channel
Ch 1
,
Ch 2
, or both
channels
Ch 1&2
.
The selected channel is displayed in green in the channel display.
Selecting the type of
level range
switchover
2.
Press the
function key
in the
menu.
A selection field containing the available settings is displayed. The
default setting is “Auto“.
3.
Use the
rotary knob
[11] to select a setting.
4.
Press the
ENTER key
[5] to close the selection field.
The new setting is stored and displayed in the parameter field.
Ch 1
Ch 2
Summary of Contents for Smart Instruments UP300
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