8-29D: Displays

Question 1

8-29D3

The purpose of the aquadag coating on the CRT is:
A. To protect the electrons from strong electric fields.
B. To act as a second anode.
C. To attract secondary emissions from the CRT screen.
D. All of the above

Answer 1

ANSWER D
The aquadag coating on a CRT acts as a second anode and attracts secondary emissions from the CRT. It also provides shielding from strong electric fields that may be present near the CRT tube.

Question 2

8-29D6

Select the statement, which is most correct regarding a raster
scan display.

A. Raster displays are the same as conventional T.V. receivers.
B. The scan rate for a RADAR system is 30 frames per second.
C. Raster scanning is controlled by clock pulses and requires
an address bus.
D. Raster scanning is not used in RADAR systems.

Answer 2

ANSWER C
Raster scanning on a RADAR indicator requires an address bus and clock pluses from the video amplifier.