MIL-E-1/1315E
TABLE I. Testing and inspection - continued
16.
Stability will not be measured under this test. The RF bandwidth shall be within the limits specified when a
VSWR of 1.5/1 is introduced in the load at a distance of approximately 0.5 meter from the magnetron coupling
flange, the phase being adjusted for maximum power output.
17.
The pulling measurement shall be made in such a manner that thermal effects do not introduce significant
errors.
18.
The peak anode current shall be varied between 45a and 55a at a minimum rate of 50 Hz or less. The
frequency measurement is the difference between the frequency extremes observed.
19.
Stability shall be measured in terms of the average number of output pulses missing, expressed as a
percentage of the number of input pulses applied during the period of observation. The missing pulses (MP),
due to any cause, are considered to be "missing" if the RF energy is less than 75 percent of the normal energy
level in a ± 1 percent frequency range of the normal operating frequency. The VSWR shall be adjusted to that
phase producing maximum instability and the missing pulses counted during the last 3 minutes of a 6 minute
test period. Measurements shall be made at the load phase positions corresponding to maximum instability.
20.
The frequency range of 1250 to 1350 MHz shall be covered by 43 tuner turns maximum. The number of tuner
turns needed from mechanical stop to mechanical stop shall be 48 turns minimum and 51 turns maximum. A
minimum of 2 turns shall exist from the mechanical stop to the beginning of the frequency band at 1250 MHz,
and from the end of the frequency band at 1350 MHz to the other mechanical stop.
21.
First article sample inspection shall conform to the requirements of appendix E of MIL-PRF-1 and shall consist
of performing all tests specified on this specification sheet. In addition, first article sample approval shall
include satisfactory demonstration of tube-to-system compatibility.
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