GE M
EDICAL
S
YSTEMS
PROPRIETARY TO GE
D
IRECTION
2294854-100, R
EVISION
3
LOGIQ™ 9 P
ROPRIETARY
M
ANUAL
5-22
Section 5-3 - Front End Processor
5-3-6-4
B–Mode Output Blocks
The B–mode output block collect vector data and tags for delivery to the Scan Control Board. It can form
output vectors from one or multiple input vectors (multi–transmit focus). The vector tags are used to
form the control bytes in the output vector. Only complete vectors are sent to the BM_OUTPUT Block.
The maximum vector length shall be 512 pixels.
5-3-6-5
M–Mode Output Block
M–mode acquisition is nearly always a multiple firings per output vector operation. When the vector rate
is higher than the display rate a peak accumulate function shall be used to provide an output which is
the point–by–point peak signal amplitude of all the firings since the last output. The M–mode output
block usually outputs one processed M vector after combining the receive vectors from several firings.
The maximum ratio of input vectors to output vectors is 256, although this number is transparent to the
hardware. M_GATE tag shall control when the current peak accumulation stops, the vector is sent and
a new vector is formed. The peak accumulation shall be reset after the data is sent to the BM_OUTPUT
Block.
