Rohde & Schwarz R&S UPP, Руководство пользователя

Страница: 324 / 938

Instrument Functions
R&S
®
UPP
308 User Manual 1411.1055.32 ─ 10
If the Fix and Lowest modes are selected, the set nominal range value appears in the
next field, where a new range can be set by opening the selection window.
The ranges are graduated in steps of 12 dB from 200 mV to 50 V and allow very good
dynamic range when measuring nonlinear distortion. If "Range Auto" (automatic range
selection) is set, overranging or underranging of the limits in a current measurement
range causes the instrument to switch to the next step. This is also the case for the
"Range Lowest" range setting; here, however, the instrument only goes down to the
selected range limit.
The range values are RMS values for sine waves or other signal shapes up to a crest
factor of
√
2.
CHx = Channel 1 … 8
"Auto" Automatic measurement range selection. The optimum range is set
separately for each channel.
If an input impedance of 600
Ω
has been selected and the auto
ranger detects a level of more than 12 V in any channel , then the
input impedance is switched to 200 k
Ω
for all channels and the 50 V
range is activated to protect the input resistors against overload!
"Fix" The set measurement range is fixed.
If an input impedance of 600
Ω
has been selected, "Fix" is not avail-
able for protection of the input resistors against overload!
Note: If a voltage exceeding the selected level range is applied, the
analyzer status is displayed with a red digit in the lower status line
(the digit indicates the channel that is overranged) and the measured
values are shown as invalid ("---"). On switching from Auto to Fix, the
currently valid range in the channel is taken over.
"Lowest" The set measurement range is fixed as the lowest range; in the event
of overdrive, this range is automatically substituted by higher ranges.
If an input impedance of 600
Ω
was selected, the 50 V measurement
range is not available . If the auto ranger detects a level of more
than 12 V in any channel, then the input impedance is switched to
200
k
Ω
for all channels and the 50 V range is activated to protect the
input resistors against overload.
Note: On switching from Auto to Lowest, the currently valid range in
the channel is taken over.
Remote command:
SENSe[1]:VOLTage:RANGe<n3>:MODE
on page 723
SENSe[1]:VOLTage:RANGe<n3>:VALue
on page 724
Ref Imped
Reference value for impedance.
Configure Analog Analyzer