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Doppler
LOGIQ 500 Basic Users Manual
2276612–100 Rev. 0
5–56
Reading the Doppler Display (cont’d)
The following additional parameters are displayed when in
Doppler Mode.
θ
S p e c t r u m
Ref. Value
Graphic Display
Description, Format, Values
Doppler Frequency (D)
The value is displayed in MHz (MegaHertz).
Pulse Repetition
Frequency (R)
Displays the frequency in KHz (KiloHertz).
Wall Filter (WV)
(WF)
The velocity value is displayed in m/sec (meters per second) or the frequency
value in Hz.
WV###
Dual Mode:
###WV###
Sample Volume
(Length) (SV)
Displayed in mm.
SV##
Dual Mode:
##SV##
q (
Angle)
Indicates the Doppler Angle in
Q
(degrees) between the Doppler Mode cursor and
angle correction indicator.
q
##
Dual Mode:
##
q
##
D.G
Doppler signal gain is displayed as a two digit number.
HPRF
Displayed to indicate that the system is in the high pulse repetition frequency
mode.
SPEC INV
Displayed to indicate that the spectrum display is inverted from the prescribed
norm.
D. Velocity
The Doppler velocity or frequency maximum value is displayed in meters per
second when
“Display Spectrm Ref. Value” preset, found on Set Up/Custom
Display page 16, is set to “Off”. The forward velocity (frequency) is displayed
above the spectrum while the reverse velocity (frequency) is displayed below.
When the spectrum is inverted, the velocity scale readings also invert.
Time Scale
Three speeds:
Slow (4 second sweep). Major marker = 1 second; minor marker = 0.5 second.
Medium (2 second sweep). Major marker = 1 second; minor marker = 0.5 second.
Fast (1 second sweep). Major marker = 1 second; minor marker = 0.5 second.
Spectrum Ref. Value
Doppler velocity or frequency value is displayed as a reference scale when
“Display Spectrm Ref. Value” preset, found on Set Up/Custom Display page 16, is
set to “On”. The scale size varies depending on velocity or frequency.
Table 5–9. Doppler Mode Display Format
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