Rohde & Schwarz R&S UPP, Руководство пользователя

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Instrument Functions
R&S
®
UPP
372 User Manual 1411.1055.32 ─ 10
"Fix" Fixed bandpass / bandstop center frequency. The center frequency
must be entered in the parameter field below.
Note: For infrasound measurements, the center frequency can be
reduced down to a sampling rate/48000 (but at least 1 Hz). As very
long filter settling times occur in the range below 10 Hz, measure-
ment results can only be viewed after several seconds.
"Gen Track" The bandpass / bandstop center frequency tracks the generator
(nominal) frequency. This can be changed by means of manual entry
in the Generator Function panel or owing to a generator frequency
sweep. If the internal stereo generator is used, on two-channel ana-
lyzers measurement channel 1 tracks generator channel 1 and mea-
surement channel 2 tracks generator channel 2. On multichannel
analyzers, measurement channel 1 tracks generator channel 1 and
measurement channels 2 ... 8 track generator channel 2.
By entering a factor in the next parameter field, the user can select
whether the center frequency is to be identical to the generator fre-
quency (factor = 1) or a multiple of the generator frequency. Setting a
whole number for this factor will allow individual harmonics to be
measured.
An error message is output if an unsuitable signal function is selected
in the generator (e.g. a multi-tone signal or noise signal).
Recommended for use with the internal R&S
UPP Universal Gener-
ator.
"Freq Ch1" The bandpass/bandstop center frequency tracks the frequency mea-
sured in channel 1; not selectable in the multichannel analyzers.
Recommended for use with an external signal source.
"Freq Ch2" The bandpass/bandstop center frequency tracks the frequency mea-
sured in channel 2; not selectable in the multichannel analyzers.
Recommended for use with an external signal source.
"Auto Each" The bandpass / bandstop center frequency of each channel tracks
the frequency measured in the respective channel.
If one of the channels does not provide unambiguous frequency infor-
mation - e.g. in the case of multitone or noise signals, or if there is no
input signal - the measurement for this channel is marked as invalid.
This does not have any negative impact on the measured value for
the other (valid) channel, but the measurement time is considerably
longer. In these cases, it is therefore advisable to use the appropriate
mode for each situation: "Freq Ch1" or "Freq Ch2" for the two-chan-
nel analyzers, and "Freq RefCh" mode for multichannel analyzers.
This is to be recommended when using an external stereo signal
source.
"Freq Ref Ch" The bandpass/bandstop center frequency tracks the frequency mea-
sured in the reference channel; only available in the multichannel
analyzers.
Recommended for use with an external signal source.
Level Measurements