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|  MIL-E-63300A(AR)
4.5.10 Antidisturbance function mode. With the electronic
assembly under test connected to the test fixture so that its plane
makes an approximate 45 degree angle with the horizontal, verify the
ant i-disturbance function mode by slowly rotating the electronic
assembly about the cylindrical axis and confirming that the
detonator firing circuit turns on before a 360 degree rotation is
made (See 3.4.3.1). This is a non-destructive test.
a. Alternate procedure. With the electronic assembly under
test connected to the test fixture so that its plane is parallel
with the plane of the test fixture, verify the antidisturbance
function made by passing a permanent magnet across the top of the AD
switch assembly. Proper function will be evidenced by confirming
the resulting turn-on of the detonator firing circuit. The magnet
may make brief physical contact to the top of the AD switch assembly
during this motion. The magnet flux density shall be no less than
20 gauss and no greater than 60 gauss. The magnet holding force
shall be 0.7 pounds (minimum).
4.5.11 Tripline sensitivity test. With the electronic assembly
under test connected to the test fixture, verify that each input of
the tripline-sensor interface circuit meets the sensitivity
requirement specified in 3.4.3.2. Make this verification by
incorporating, as a minimum, the following checks in the test
procedures:
a. Prior to the electronic assembly power up, check and
verify that the resistance at each tripline-sensor interface circuit
input (TP-22, TP-23, TP-24, and TP-25) with respect to ground is
less than 10 ohms.
b. After electronic arm and with the resistance at the
tripline sensor interface input under test at less than 10 ohms,
confirm that the detonator firing circuit is not turned on when this
resistance is increased to 3.9K ohms. Confirm that the detonator
firing circuit is turned on when the resistance is increased from
3.9K to 10K ohms. The change in resistance from 10 ohms to 3.9 ohms
and from 3.9K to 10K ohms shall be made such that no open circuit
condition exists during the change.
c. Reset the electronic assembly and repeat (b) above for
each tripline-sensor interface circuit input. Non-destructive test.
4.5.12 PTB oscillator circuit check. With the electronic
assembly under test connected to the test fixture and both the PTB
and TTB oscillator circuits operating at their natural frequencies,
verify that the oscillator check circuit is operational by
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