lab_1a_2014 - ECE 145A/218A Lab Project#1a passive...

This preview shows page 1 - 3 out of 11 pages.

1 ECE 145A/218A, Lab Project #1a: passive Component Test. October 6, 2014. OVERVIEW ...............................................................................................................................................2GOALS: .........................................................................................................................................................2PRECAUTIONS TO AVOID INSTRUMENT DAMAGE....................................................................................................2SAFETY PRECAUTIONS......................................................................................................................................2READING: ......................................................................................................................................................3NETWORK ANALYZER CALIBRATION .........................................................................................................3COMPONENTS AND TRANSMISSION-LINE CHARACTERISTICS. ..................................................................4MECHANICS...................................................................................................................................................4CHARACTERISTICS OF THROUGH-LINE..................................................................................................................5determining the reference plane offset ................................................................................................5Line measurements ...............................................................................................................................6PASSIVE COMPONENT TESTS:MAKING AND CHARACTERIZING THE FIXTURE. ................................................................6PASSIVE COMPONENT MEASUREMENTS. ..............................................................................................................8APPENDIX ................................................................................................................................................9RUNNING LINECALC........................................................................................................................................9
2 Overview Goals:(a) Introduction to the vector network analyzer and measurement of S-parameters. 1. Learn to calibrate the network analyzer. This will be described in the lab demo. (Note. Please treat the cal kit with respect. Don’t leave the standards sitting on the bench. Return them to the box. 2. Understand the use of port extensions. 3. Understand use of Smith Chart and rectangular displays (b) Observation of transmission line behavior in PCB layout. (c) Understanding non-ideal behavior of RF components. Precautions to avoid instrument damage(a) Observe static precautions when working with the network analyzer. Wear the wrist strap. (b) Never connect a network analyzer directly to a circuit carrying dc. Make sure your circuit is dc blocked, or you will destroy the NA. Safety precautions(a) Safety note: please be very careful with the X-acto razor-blade knives. Use the same level of care you would use with a very sharp kitchen knife ! We want no injuries. (b) Common solder is tin-lead and is toxic. If ingested, lead accumulates in your body and slowly and progressively causes brain damage as well as damage to other organs. The shop sells non-lead-containing solder. Do not bring lead-containing solder into the lab.That means, do not purchase solder at Radio-shack or other vendors unless you very carefully check its metal composition. The new non-lead solders have a higher melting point, which makes soldering harder, particularly soldering to ground planes. Use a higher-power (hotter !) iron for soldering to the ground plane. (c) In case some student fails to follow the solder rules above, do not eat or bring food into the lab, wash your hands immediately after leaving the lab, and sweep up and dispose of any solder debris. Do not use solder-suckers for desoldering , as these spray a fine powder of solder all over the room. Horribly toxic if some fool uses them with lead solder ! Use desoldering wick (braid) instead; it is better anyway.

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture