Hitachi S-4800 manual Signal Select block

2.3.6.1SIGNAL SELECT block

Signal select box

Right half image Signal select box

Signal addition indicator

SE detector selection

Signal control tools

GW BSE control button

BSE ratio selection box

(1) Signal select box

Selects image signal for Full and Small screen mode and the A image of Dual screen mode.

(2) Right half image Signal select box

Selects image signal for the B image of Dual screen mode and the right half image of Split / Dual mag mode.

(3) Signal addition indicator

Controls adding two signals selected above Signal select boxes on the Dual screen mode. When you click the left side indicator, it becomes green color and the mixed of the two signals is displayed on the left (A) screen. If click the right side indicator, the mixed signal is displayed on the right (B) screen. The signal addition is effective only on the Dual screen mode.

(4) SE detector selection

S-4800 SEM has two detectors, Upper and Lower. These have different characters and therefore result different image information. Also mixed signal of two detectors is available. Select with Mix / Upper / Lower buttons.

Refer to <3.5.1 SE detector>

(5) Signal Control tools

Ratio of SE and BSE included in the upper detector output signal is controllable with the tools. When SE is selected, observing image will be of pure SE signal.

When +BSE is selected, amount of BSE signal is controlled by BSE ratio selection box. Select a ratio from the pull down list clicking the arrow button. Low angle BSE will be detected with L.A0 to L.A100. With larger number, amount of SE is suppressed and results BSE richer image. H.A results high angle BSE image.

Refer to <3.5.1.2 Signal Control>

(6) GW BSE control (option)

Opens control dialog window for GW type BSE detector.

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