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| MIL-T-22913C(OS)
level suitable for any otherwise acceptable commercial counter. If a
potentiometer is used, its total resistance shall not be less than the
impedance specified in 4.5.2.6.1.4.
4.5.2.6.1.4 Input impedance at 400 Hz: 5000 ohms minimum.
4.5.2.6.2 Time interval measurement section.
0.1 ms to 1500 ms minimum.
4.5.2.6.2.1 Range:
Plus or minus 0.1 ms minimum.
4.5.2.6.2.2 Accuracy:
circuits. The start-to-count signal channel
4.5.2.6.2.3 Triggering
channel shall be capable of either independent
and the stop-count signal
change from independent to common operation
or common operation. The
a switch.
shall be made by means of
(a) Signal range: Both the start and stop channels shall be cap-
able of operating on signals having a positive slope and a magnitude of
plus or minus 30 volts dc. The triggering level shall be continuously
adjustable from plus 30 volts dc to minus 30 volts dc minimum.
30,000 ohms shunted by 100 micromicrofarads
(b) Input impedance:
minimum.
4.5.2.6.3 Period measurement section.
18 seconds to 22 seconds minimum.
4.5.2.6.3.1 Range:
4.5.2.6.3.2 Accuracy:
plus or minus 0.01 seconds minimum.
4.5.2.6.3.3 Allowable input signal voltage: 15 volts peak.
50,000 ohms shunted by 100 micromicro-
4.5.2.6.3.4 Input impedance:
farads.
4.5.2.7 Four dummy loads, constricted as follows:
(a) One resistive leg shall be connected in parallel with a capaci-
tive-resistive leg. The junction between the two resistors shall be
called terminal A.
(b) The remaining connection between the parallel legs shall be
called terminal B.
(c) The connections between the resistor and capacitor in the
capacitive-resistive leg shall be called terminal C.
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