Keysight 86205A, Operating And Service Manual

Page: 35 / 45

Performance Tests 3
Keysight 86205A Operating and Service Manual 35
Directivity Test
Recommended equipment
Procedure
1 Switch the RF output to port 2 on the test set to prevent the test set from switching the test
port power during the calibration, by pressing:
PRESET
MEAS, S12
INPUT PORTS, A/R
2 Set the IF bandwidth to 30 Hz and the analyzer power to 20 dBm, by pressing:
AVG
IF BW, 30, x1
MENU
POWER, 20, x1
3 Put the analyzer into hold mode and move the reference line up so that the data trace can be
seen, by pressing:
RETURN, TRIGGER MENU, HOLD
SCALE/REF
REFERENCE POSITION, 8, x1
4 Set up a log frequency sweep from 300 kHz to 5 MHz, by pressing:
STOP, 5, M/m
MENU
SWEEP TYPE MENU, LOG FREQ
5 Make a S22 one-port calibration (to calibrate A/R, even though test port appears to be port 2),
by pressing:
CAL
CAL KIT, N 50 ohm
RETURN, CALIBRATE MENU, S22 1-PORT
Table 3-3 Recommended equipment for directivity test
Equipment Recommended model
Network analyzer 8753C (or 8753A with 85046A)
S-parameter test set 85046A or 85047A
50 W type-N calibration kit 85032B
50 W type-N (m) load 909F option 012
Type-N cable part number 8120-4781