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Technical Specifications


SCD 10 - Specifications

Jan 20, 2019

General Specifications

Subcarrier Frequency39 kHz, 41 kHz, 67 kHz, 92 kHz, 110 kHz, 152 kHz, 185 kHz
Subcarrier Input0.1 to 1 volt RMS. 10K ohms impedance, BNC connector. Panel adjustment
Demodulator DistortionPhase-locked FM detector has less than 0.6% THD
Audio ProcessingDe-emphasis: 0, 75, 150, 225 microseconds, user selectable.
Low-pass FiltersAudio cut-off frequencies of 3 kHz, 5 kHz or 7.5 kHz are specified with original equipment order. The lowest possible cut-off frequency is recommended. Maximum cut-off is 12% of subcarrier frequency.
CompandingAn optional compander decode board is available for installation in the SCD 10 when used in a subcarrier link having a SCG 10 subcarrier generator with a compander encode board. Companding will reduce noise and can mask certain types of main channel to subcarrier cross-talk.
Frequency Respose+/- 1.5dB, 25 Hz to 95% of low-pass filter cut-off frequency
Signal/Noise RatioMore than 68dB below 5kHz deviation (using SCG 10 as signal source directly connected to SCD 10 input. 225 microsecond pre/de-emphasis
Audio Output Level+10 dBm maximum output level balanced and isolated into 600 ohms. Front panel adjustment range -60 dBm to +10 dBm
Subcarrier SquelchFront panel adjustable squelch relay will squelch audio output over subcarrier level range of 0.1 to 2.0 volts input. Normally open relay contacts available at accessory "D" connector for external functions. LED on front panel indicates "squelch open" condition.
MeteringIlluminated panel meter indicates subcarrier input level or audio output level.
ControlsMeter Switch, Squelch Adjust/Squelch Open (LED panel indicator), Subcarrier Input Level Adjust, Audio Output Level Adjust
ConnectorsBNC jack for subcarrier input, 9 pin "D" connector for balanced audio output, squelch relay contacts. FSK output, ground, +18 to 20 volt input, +13.5 volt input, AC receptacle, 6-32 screw terminals for balanced 600 ohm audio input.
RF ProtectionAll input/output circuits filtered for RF. Totally shielded and bonded aluminum closure.
Operating Temperature Range-10 degrees C to +50 degrees C
Power Requirements120/220/240 VAC (voltage to be specified on original order), 50/60 Hz, 10 watts or 12-14 VDC at 50 ma negative ground or 24-28 VDC at 70 ma (28 volt operation require the APS-28/18 power supply)
AC Fuse RatingFor 120 V, use 3/8 amp fuse

Physical Specifications

Weight4.5 pounds 2.1 kilograms
Dimensions1-3/4 iinches high x 19 inches wide x 12 inches deep. 4.45 cm high x 48.26 cm wide x 30.48 cm deep
Shipping Weight9 pounds domestically. 4.1 kilograms export

Special Notes

Specifications subject to change without notice

All Specifications Subject to Change Without Notice

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