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QSG-15850 Rev. New

Holt Integrated Circuits

ADK-15850 Quick Start Guide

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HI-15850 Transceiver

Demonstration Board

June 20

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Summary of Contents for ADK-15850

Page 1: ...QSG 15850 Rev New Holt Integrated Circuits ADK 15850 Quick Start Guide HI 15850 Transceiver Demonstration Board June 2020 ...

Page 2: ...QSG 15850 2 Holt Integrated Circuits REVISION HISTORY Revision Date Description of Change QSG 15850 Rev New 06 12 2020 Initial Release ...

Page 3: ...ly to test points 3V3 and GND along the top edge of the board Bus Receive Signal Path A pair of CMOS logic levels depending on the voltage selected by J7 1 8V 2 5V or 3 3V provides bipolar serial signals for connecting each bus to an external user provided Manchester decoder RXA and nRXA are the non inverted and inverted receiver outputs for Bus A RXB and nRXB are the receiver outputs for Bus B Th...

Page 4: ...NA and RXWIDENAB inputs By default the RXWIDENA and RXWIDENB DIP switches on package SW1 are set for logic 0 state so neither bus has this option enabled on the HI 15850 Signal Break Out Board Bus Transmit Signal Path A pair of CMOS logic level inputs accepts bipolar serial signals for driving each bus from an external user provided Manchester encoder Transmit for each bus can be enabled or inhibi...

Page 5: ...ect one of six correction levels There are two no correction TOC combinations Table 2 on page 7 in the HI 15850 data sheet summarizes the TOC switch combinations Figures 4 and 5 in the data sheet show examples of various applied correction levels Tail off trim for Bus B works similarly using switches labeled TOC0B TOC1B and TOC2B on DIP switch package SW2 All TOC input pins have weak pull down res...

Page 6: ...coupler which is typically an off the shelf hardware component comprised of coupling transformer s for one or more terminal stubs each with its own pair of internal current limiting resistors Two bus couplers are shown above The bus couplers have a bus connection jack at each end for serial connection into the 1553 bus structure Each end of the bus has a 78Ω terminator Holt application note AN 550...

Page 7: ...al test point pairs are labeled BUSA nBUSA and BUSB nBUSB for the two buses Differential line to line voltage measurement for Bus A can be accomplished by connecting oscilloscope probes for channel 1 and channel 2 to the BUSA and nBUSA test points respectively and using scope built in math function to observe channel 1 minus channel 2 R14 must be open circuit for this configuration If R14 is short...

Page 8: ...Size Document Number Rev Date Sheet o f HI1585PC Break Out Board NEW HI 15850PC Signal Break Out Board Custom 1 1 Thursday June 04 2020 TP12 R8 70 1W D1 Green LED TP3 JP1 R7 70 1W J6 CON2 1 2 J2 1 2 TP5 U3 LF25CDT IN 1 OUT 3 TAB 4 R13 330 C7 1uF J5 BJ77 J3 VERT RIGHT ANGE MALE 2x6 1 2 3 4 5 6 7 8 9 10 11 12 3 2 1 4 ON CLOSED SW1 4 Pos DIP Switch R1 55 1 2W TP11 TP14 TP7 J4 1 2 R14 Shunt JP9 T1B PM...

Page 9: ...1 R12 P10ACT ND Panasonic ERJ 6GEYJ100V 15 1 Res 330 1 8W 5 0805 SMD R13 P330ACT ND Panasonic ERJ 6GEYJ330V 16 1 Solder Jumper R14 Link GND_CHSGND Open Soldered Link GND_CHSGND 17 1 Switch Slide Dip 4 SPST 100MA 20V SW1 CT2194MST ND CTS 219 4MST 18 2 Switch Slide Dip 5 SPST 100MA 20V SW2 SW3 CT2195MST ND CTS 219 5MST 19 4 Test Point 0 040 TP5 TP6 TP9 TP10 DNI 36 5002 ND Keystone 5002 20 1 Test Poi...

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