4.4
The following cap voltages are available in a Standard Square cap but are not covered by MIL-PRF-22885. These caps are not available in Large Rectangular caps.
Standard Square caps with these voltages are available in all Display Styles (see Figure 1.2.1-A), Lighting Types (see Section 1.2.2), Fonts (see Section 1.2.3) and Colors (see Section 1.3). Only Option A from Figure 1.5.4-A (Segment Interconnect Options) is available with these voltages.
Luminance is controlled by variable voltage control. Discrete Dimming, Press-to-Test, and Blocking Diodes options are not available with cap voltages listed in Appendix D.
|
Figure 4.4.0-A Other Cap Voltage Characteristics |
|||
|---|---|---|---|
| Voltage | Cap Schematic | Luminance Levels | |
| Single Common | Split Common | ||
| 28 VAC | 
|
|
similar to Figure 1.4.1-C |
| 5 VAC |
|
|
similar to Figure 1.4.1-D |
| 115 VAC, 400 Hz |
|
|
similar to Minimum/Typical shown in Figure 1.4.1-C at 28VDC |
| 115 VAC, 60 Hz |
|
|
similar to Minimum/Typical shown in Figure 1.4.1-C at 28VDC |
Caps with the voltages above meet all of the environmental qualifications shown in Section 3.1.1 with the following exceptions.
|
Figure 4.4.0-B Environmental Qualifications |
||||
|---|---|---|---|---|
| Test Description | Specification | Section | Category | Reference Levels |
| Power Input Aircraft Power (AC) | RTCA/DO-160 (400 Hz Parts) |
16.5.1 | A(CF) | 115 VAC 400 Hz |
| 16.5.2 | A(CF) | 115 VAC 400 Hz | ||
| MIL-HDBK-704-B (60 Hz Parts) |
LDC 101, 102, 104-110, 201, 301, 302, 304, 401, 601, 603 |
5 VAC, 28 VAC, 115 VAC 60 Hz | ||