MIL-PRF-1/383E
Table I. Testing and Inspection -Continued.
Inspection
Method
Conditions
Acceptance
Symbol
Limits
Limits
Unit
Levels
Min
Max
MIL-STD-
1311
(see Note 19)
Conformance inspection,
part 3 -Continued
Life test end points
---
Power output
Osc. (2); Note 6
Po
120
---
Watts
Tunable frequency
Osc. (2) Upper limit
F
---
5825
MHz
Osc. (2) Lower limit
F
5450
---
MHz
RF bandwidth
Osc. (1) and Osc. (2)
F
---
3.0/tp
---
Minor lobes
Osc. (1) and Osc. (2)
Ratio
6
---
---
Stability
Osc. (2); Notes 6
Missing
---
0.5
%
and 8
Pulse
Stability
Osc. (1); Notes 6, 8
Missing
---
0.5
%
and 17
Pulse
NOTES:
1. The rate of rise of voltage (rrv) shall be expressed in kilovolts per microsecond. Any capacitance used in the viewing
system shall not exceed 6 pF.
2. The temperature shall be measured at the point shown on figure 1.
3. The heater voltage for standby operation is 13.5 volts ±10 percent. The schedule by which the heater voltage shall
be reduced after the application of high voltage shall be as follows:
For Pi up to 250 watts, Ef = 13.5 ±10 percent
For Pi 250 watts to 300 watts, Ef = 13.4 ± 10 percent
For Pi 300 watts to 400 watts, Ef = 13.2 ± 10 percent
For Pi 400 watts to 500 watts, Ef = 13.0 ± 10 percent
For Pi 500 watts to 600 watts, Ef = 12.5 ± 10 percent
4. With a total airflow of approximately 30 c.f.m. at approximately 760 mm Hg. and 25°C, the temperature shall not
exceed the limit specified.
5. The frequency shall be the frequency of minimum power output between 5450 and 5825 MHz.
6. Though the requirement exists continually from 5450 to 5825 MHz, tests shall be performed at the following frequencies:
F1 = 5450 ± 5 MHz
F2 = 5625 ± 5 MHz
F3 = 5825 ± 5 MHz
7. The spectrum shall be measured with a VSWR of 1.5 introduced in the load at a distance no greater than 1 meter
from the magnetron coupling flange, the phase being adjusted to produce maximum spectrum degradation. A
satisfactory spectrum is one whose slope does not change sign more than once for power levels greater than the
specified dB below its peak.
8. Stability shall be measured with the tube terminated in a transmission line of 1.5 VSWR adjusted in phase to produce
maximum instability. The tube shall be considered stable if the specified missing pulse limit is not exceeded during
any 3 minute interval of a 6-minute test period.
9. The power output shall be continuous over the range from 5450 to 5825 MHz. At no frequency in this range shall the
power output be less than the specified minimum value.
4
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