1988 Ed.]
Import and Export (Strategic Commodities) Regulations
[CAP. 60
G 139
[Subsidiary]
IL 1588
Note:
Ageing rate shall be measured over a longer period at a constant temperature of +60°C or higher +2°C.
(c) Temperature-compensated crystal oscillators (TCXO) having any of the following characteristics:
(1) A stability with respect to temperature of better than 0.00015 per cent over their operating temperature range;
(2) An operating temperature range wider than 20°C;
(3) Capable of reaching to within 1 x 10-7 of normal operating frequency or better in 3 minutes or less from switch-on at an ambient temperature of 25°C;
(4) Rated to have an acceleration sensitivity of less than 1 × 10-9 of the operating frequency per g (where g = 981 cm/sec2) over a vibration test frequency range from 10 to 2,000 Hz sine wave and with a maximum level of acceleration not exceeding 20 g;
(5) Designed to withstand a shock greater than 10,000 g (where g = 981 cm/sec2) over a period of 1 millisecond;
(6) Radiation hardened to better than 10-10 of the operating frequency per gray (1 rad = 10-2 gray).
Notes:
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This item does not embargo quartz crystals for use as filter elements which have either of the following characteristics:
(a) Designed for operation as intermediate frequency filters operating from 10.5 to 11 MHz or from 21 to 22 MHz with 3 dB bandwidths not exceeding 40 kHz, or
(b) Designed for operation as single side-band filters operating at from 1 to 10 MHz with 3 dB bandwidths not exceeding 4 kHz.
This item only covers quartz crystals having piezo-electric qualities. It is understood that this definition does not cover optical grade quartz crystals.
Nothing in the Notes above shall be construed as sanctioning the export of technology for quartz crystal elements or assemblies thereof.
Materials composed of crystals having spinel, hexagonal, orthorhombic, or garnet crystal structures; thin film devices; assemblies of the foregoing; and devices containing them, as follows (for equipment which may be exported in conjunction with computer shipments, see Item IL 1565)
(a) Monocrystals of ferrites and garnets, synthetic only;
(b) Single aperture forms possessing either of the following characteristics:
(1) Switching rate of 0.3 microsecond or faster at the minimum field strength required for switching at 40°C (104°F);
(2) A maximum dimension less than 18 mils (0.45 mm);
Note
For machinery and equipment associated with forms having a maximum dimension less than 30 mils (0.76 mm), see Item IL 1358.
(c) Multi-aperture forms with fewer than 10 apertures possessing either of the following characteristics:
(1) Switching rate of 1 microsecond or faster at the minimum field strength required for switching at 40°C (104°F);
(2) A maximum dimension less than 100 mils (2.54 mm);
(d) Multi-aperture forms having 10 or more apertures;
(e) Memory storage or switching devices, as follows:
(1) Thin film (including plated wire and plated rods);
(2) Single crystal or amorphous film magnetic bubble;
(3) Moving domain; or
(4) Crosstie;