GE Medical Systems LOGIQ ?200, Service Manual, Page: 71 / 212

GE MEDICAL SYSTEMS
LOGIQ 200 SERVICE MANUAL
2138853
FUNCTIONAL CHECKS
4–5
REV 2
4–2–2 M-Mode Check
Step Check Expected Result
13 Press M key. The M mode timeline should appear next to the B
image as shown in ILLUSTRATION 4–2. Whether it
takes half the screen or two–thirds depends on the
preset.
Roll trackball, position cursor
over area you want to see in
motion. The Mode cursor should follow trackball movement
and the timeline should update for new location of
focus.
Press M key again. The full M-mode should appear on the CRT monitor.
14 Rotate B/M Gain knob The M timeline should get brighter with CW rotation
and darker with CCW.
15 Press Dyn Range Arrow up or
down key. Dynamic Range affects grays and the last added scan
mode; to adjust the basic B, M must be off. Turn
Dynamic Range down to increase contrast, turn up to
soften.
16 Press Sweep Speed key
Press it again to exit.
The timeline speed should increase to 4 second
sweeps and decrease to 16 second sweeps.
Fast=4
Medium=8 Slow=16
17 Press Freeze key.
Press it again to exit.
The image should freeze.
The image revives acquisition.
18
Press Edge Enhc key. Changes the M image
19 Press B key. The M Mode timeline should disappear and the
B-mode image should appear as shown in
ILLUSTRATION 4–1.