The testing lab contains a number of high performance and expensive equipment. Acquaint yourselves with the equipment by reading the manuals to get the best out of them. Here is a list of instruments in the testing lab.

• Use seperate symbols for electrolytic capacitors and surface mount capacitors.
• While using electrolytic capacitors, pay attention to the positive and negative terminals. Terminal 1 in schematic should be connected to higher voltage and terminal 2 to lower voltage.
• Maximum value of non-polar surface mount cap is 1uF (@ modi electronics, ritchie street).
• Use seperate symbols for thru-hole resistors and surface mount resistors.
• There is a pushbutton in Orcad to generate 'Bill Of Materials'. This will aid in determining which all components to purchase.

• To save schematics as PDF, first you will need to install PDF995 ( a free software).
• Change print setting to 'Landscape', and output as 'PDF995'.

• First switch off 'Online DRC'. Else you will be unable to reorder the footprints.

• Before starting to route, we must fix the width of each net. Tools–>Net–>Select from Spreadsheet. Here we can fix the min,typ and max width of each net. For GNDA and VDDA it is 12,50,100, and for other nets 12,25,50.
• To start routing click 'Add/Edit Route Mode' button in the task bar.

• .MAX file contains the layout and .DSN file contains the schematic.
• Only the .MAX file needs to be submitted for fabrication. No need to generate the GERBER files.
• The shape of the PCB need not necessarily be a square/rectangle.

• Printed Circuit Services(Zeta), I-1, Dr.V.S.I Estate, Near NIFT, Thiruvanmiyur. Ph: 22541641, 42150860, Email: plot@zetapcs.com
• Tessolve

• Type of material used : FR-4(an abbreviation for Flame Retardant 4, a glass reinforced epoxy laminate used for making printed circuit boards.)
• Dielectric Constant: Varies according to the frequency applied and depends on the vendor.(A value of 4-4.5 seems to be appropriate for high frequency designs >1GHz)
• Standard thickness of board: 1.6 mm
• Thickness of copper trace: 35 µm

The above information can be used to determine the trace impedance.

• Modi Electronics, No 6, 1st floor, Ritchie Street. Ph: 28414140
• Mercy Electronics, L.B Road, Adyar. Ph: 24464481
• Mency Electronics, Tharamani Road, Velachery. Ph: 22434773, 42082097
• Texonic, Ritchie Street. Ph: 28410638
• Globe Tronics, Ritchie Street. (All kinds of male/female connectors, adapters etc.) Ph. No: 42119262, 42149503
• SRICOM(Srinar Communications) (RF Cables, Connectors, and other accessories…) http://www.sricomworld.in/; email : mtk@sricomworld.com
  Ph.No : +91 9841005125 (Mr. Ismail)

Sri International