LABORATORY MANUAL

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(iv) Calibrate the Network Analyzer for Reflection at port #1 (without the cable). NOTE: Follow instructions from Lab #1 starting from CAL, Calibrate MENU, etc.
PART III LABORATORY MANUAL

Electromagnetic Waves and Transmission Lines By Dr. Jayanti Venkataraman

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Experiment I - Calibration of the Network Analyzer Objective: Calibrate the Network Analyzer for Transmission

Procedure: (i) Turn the Power On (ii) Set the Frequency for Measurements MENU (for HP8753ET choose SWEEP SETUP) CW FREQ 600 M (iii) Choose appropriate Calkit CAL CALKIT SELECT CALKIT N 50Ω (iv) Calibrate the NA with a cable on port #1

(a) HP8752 Network Analyzer CAL CALIBRATE MENU RESPONSE (Connect the cable from port #1 to port #2) THRU Remove cable from port #2 and connect a SHORT at the end of the cable from port #1 SHORT (M) Connect an OPEN at the end of the cable from port #1 OPEN (M) DONE RESPONSE NA calculates cal coefficients (b) HP8753 Network Analyzer CAL CALIBRATE MENU FULL 2 PORT (Ignore error message) REFLECTION FORWARD Electromagnetic Waves and Transmission Lines By Dr. Jayanti Venkataraman

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Connect a SHORT at the end of cable from port #1 SHORTS SHORT(M) (NA beeps and underlines) DONE SHORTS Connect an OPEN at the end of cable from port #1 OPENS OPEN(M) (NA beeps and underlines) DONE OPENS Connect 50Ω load at the end of cable from port #1 LOAD (NA beeps and underlines) REVERSE Connect a SHORT at port #2 SHORTS SHORT(F) (NA beeps and underlines) DONE SHORTS Connect an OPEN at port #2 OPENS OPEN(F) (NA beeps and underlines) DONE OPENS Connect 50Ω load at port #2 LOAD (NA beeps and underlines) STANDARDS DONE TRANSMISSION (Connect the cable from port #1 to port #2) FWD TRANS THRU FWD MATCH THRU REV TRANS THRU REV MATCH THRU (NA beeps and underlines all four) STANDARDS DONE ISOLATION OMIT ISOLATION ISOLATION DONE DONE 2-PORT CAL NA calculates cal coefficients

Electromagnetic Waves and Transmission Lines By Dr. Jayanti Venkataraman

204

(b) HP8753ET Network Analyzer

CAL CALIBRATE MENU ENHANCED RESPONSE TRAN/REFL ENH. RESP. REFLECTION Connect a SHORT at the end of cable from port #1 SHORTS SHORT(M) (NA beeps and underlines) DONE SHORTS Connect an OPEN at the end of cable from port #1 OPENS OPEN(M) (NA beeps and underlines) DONE OPENS Connect 50Ω load at the end of cable from port #1 LOAD (NA beeps and underlines) STANDARDS DONE TRANSMISSION (Connect the cable from port #1 to port #2) DO BOTH FWD THRUS (NA beeps and underlines all three) ISOLATION OMIT ISOLATION DONE FWD ENH RESP NA calculates cal coefficients (iv) Verify the Calibration Connect a short at the end of the cable FORMAT SMITH CHART MEAS REFLECTION The impedance should read ‘zero’ SCALE REF ELECTRICAL DELAY Use the dial move the marker to read a ‘SHORT” on the Smith Chart

Electromagnetic Waves and Transmission Lines By Dr. Jayanti Venkataraman

205

Prelab for Experiment II -Time Domain Analysis A 75 Ω lossless line of length 200m, filled with polyethylene (εr=2.25) is terminated by an open RL = ∞ (Ω). A DC voltage Vg from the network analyzer of the internal resistance 50 Ω is switched onto the line a t=0. Defining one transit down the line as T=l/v, develop an echo diagram and plot the voltage at the input of the line, V(o,t) vs time, t, for a time period 0