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Set to Centre sets the step size equal to the centre frequency.
Set to M1 sets the step size equal to frequency of the M1 marker.
4.3.6 Frequency/Span > Frequency Presets
Provides a quick method of storing and recalling frequency ranges (span or
start+stop). No other parameters are stored or recalled.
Full Span sets the frequency range to 10MHz to 3600MHz for a PSA3605 or
6000MHz for a PSA6005.
Store Preset creates a pop-up menu of six preset numbers. Pressing a key in the
pop-up stores the current frequency range into that preset position. Any existing
frequency range will be over-written.
Recall Preset creates a pop-up menu of six preset numbers. Pressing a key in the
pop-up sets the frequency range that has been stored in that preset position. If
nothing has yet been stored in that position, an error message will appear.
Toggle Last restores the frequency range that existed prior to the last preset being
recalled.
4.4 Sweep/BW
4.4.1 Sweep/BW > RBW/VBW
Sets the Resolution Bandwidth (RBW) and Video Bandwidth (VBW) for the sweep.
RBW Auto automatically selects an appropriate RBW for the current span. When
selected, the word Auto appears in front of the RBW value.
RBW Set creates a pop-up menu from which an RBW can be selected between
300Hz and 10MHz in a 1:3:10 sequence.
VBW Track sets the VBW to track the RBW value subject to the Track Offset.
When selected, the word Trk appears in front of the VBW value.
Track Offset sets the relationship between VBW and RBW for VBW Track mode.
Positive numbers set a VBW one step higher while negative numbers set it one
step lower. The default is zero.
VBW Set creates a pop-up menu from which a VBW can be selected between
300Hz and 10MHz in a 1:3:10 sequence.
4.4.2 Sweep/BW > Sweep Time
The normal sweep time is automatically set by the Span and the RBW and is
displayed within the lower annotation area. Narrower RBW settings create longer
sweep times. For each RBW, the normal sweep time is broadly proportional to the
frequency span. The sweep time can be manually reduced in order to improve responsiveness
at the expense of some amplitude accuracy.
Auto selects the normal sweep time and ensures the highest degree of level
accuracy.
Manual Down reduces the sweep time in three steps indicated by F1 to F3. The
maximum levels of sweep time reduction are 2, 5 or 10 but the actual reduction
varies with span and RBW. Wide RBW sweeps will not reduce.
Set to
Centre
Set to
M1
Freq
Presets
Full
Span
Store
Preset
Recall
Preset
Toggle
Last
RBW/
VBW
RBW
Auto
RBW
Set
VBW
Track
Track
Offset
VBW
Set
RBW/
VBW
Auto
Manual
Down
