Rohde & Schwarz 1145.1010.04/05/06, Руководство по эксплуатации

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Channel Menu R&S
®
ZVA/ZVB/ZVT
1145.1084.12 4.124 E-6
Configuration dialog.
•
A port and stimulus-dependent correction factor p
corr
introduced by a generator (source) power
calibration.
•
The port-specific generator step attenuator setting a
step
.
If everything is expressed in dB units, the output power p
el
at each port must be equal to the sum of the
channel power and all port and stimulus-dependent correction factors:
p
el
= p
ch
+ p
b
+ p
Slope
+ p
corr
+ a
step
•
The automatic attenuator setting algorithm selects a
step
such that the variation range for p
el
is
sufficient to account for the stimulus-dependent variations of p
b
and p
Slope
, and p
corr
. If this is
not possible in a particular subrange of the sweep (e.g. because the sweep settings are such
that an excess variation range for p
el
or a negative attenuation factor a
step
would be required)
then the analyzer generates an error message.
The position and function of the step attenuators is illustrated in the following figure. The analyzer
measures both the attenuated generated waves and the attenuated waves received from the DUT.
Remote
control:
INPut<Pt>:ATTenuation
[SENSe<Ch>:]POWer:ATTenuation ARECeiver | BRECeiver | CRECeiver
| DRECeiver, <attenuation>
Step Atten. b2
Opens the numeric entry bar to set the attenuation for the received wave b2. This function is available
only if a receiver step attenuator is installed at port 2.
The attenuation is used to adjust the received signal level at port 2 to the input level range of the
analyzer in order to avoid damage to the instrument, e.g. if the DUT is a power amplifier . The range of
values depends on the analyzer model.
Using a single step attenuation b2 corresponds to a standard test setup with 0 dB generator attenuation
and attenuation of the (amplified) wave received at test port 2. The attenuation factors for all received
and generated waves can be set via Step Attenuators.
Remote
control:
INPut<Pt>:ATTenuation
[SENSe<Ch>:]POWer:ATTenuation ARECeiver | BRECeiver | CRECeiver