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Midian Electronics BTD-1A, Manual

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Summary of Contents for BTD-1A

Page 1: ...1 BTD 1A Burst Tone Decoder 1200 2600 Hz BTD 1B Burst Tone Decoder 700 3000 Hz Manual Revision 2012 10 19...

Page 2: ...mV 2 0 V RMS Input Impedance 100 k Momentary Latched Output Current 200 mA Ringing Output 2400 Hz Detect Release Time 20 ms 1 5 sec GENERAL INFORMATION Midian s BTD 1 product is a burst tone decoder t...

Page 3: ...r is present and low when the carrier is missing With JU6 installed connect to a point in the receiver that is low when a carrier is present and high when the carrier is missing Repeater knock down wi...

Page 4: ...puts This delay is used to prevent falsing due to short duration audio signals entering the decoder R11 adjusts the amount of negative or positive squelch input voltage that is required to disable the...

Page 5: ...he green lead Pin 1 for approximately 2 seconds The high output of U3B is also passed to the input of latch U2C U2C turns on producing a high output that turns on Q3 which creates a low call light out...

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Page 7: ...4 GROUND BLUE P1 5 LO Z ORG P1 6 TONE IN YEL P1 7 SQUELCH IN GRN WHT P1 8 SQUELCH OUT WHITE P1 9 CALL OUT GRAY WHT P1 10 HORN OUT GRAY P1 11 MONITOR 2 ORG WHT P1 12 MONITOR 1 VIOLET P1 13 HI Z GND VAN...

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Page 11: ...4 GROUND BLUE P1 5 LO Z ORG P1 6 TONE IN YEL P1 7 SQUELCH IN GRN WHT P1 8 SQUELCH OUT WHITE P1 9 CALL OUT GRAY WHT P1 10 HORN OUT GRAY P1 11 MONITOR 2 ORG WHT P1 12 MONITOR 1 VIOLET P1 13 HI Z GND VAN...

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