c.
Directivity Measurement — 2 GHz and
above
1. On the network analyzer, Press
CHANNEL 2
key to
OFF
.
2. Press
CHANNEL 1 MENU
key.
3. Using the
MENU
up-down keys: Highlight
RETURN LOSS, then press
SELECT key.
4. Press the
CALIBRATION
key.
5. Using the
MENU
up-down keys: Highlight
START CAL, then press the
SELECT
key.
6. Connect SWR Autotester to
INPUT A,
if you
have not done so yet.
7. Connect the beadless end of the air line to the
SWR Autotester test port. Pay careful atten-
tion to making a good connection. Refer to
Figure 7, which shows examples of good and
bad connections. If you are using 19SX50 se-
ries air lines (WSMA connectors), use a com-
pensation washer as shown in Figure 10 (page
11).
8. Connect OPEN to air line and press
SELECT
key.
9. Connect SHORT to air line and press
SELECT
key.
10. Connect 20 dB Offset Termination to air line
and press
SELECT
key.
11. Press
CHANNEL 1 MENU
key.
12. Using the
MENU
up-down keys: Highlight
REF LINE and press
SELECT
key. Then
highlight ON and again press
SELECT
key.
13. Using
DATA ENTRY
knob, set reference line to
forth graticule line from top (Figure 8).
Figure 7. Examples of Good and Bad Air Line Connections.
BAD
GOOD
REFERENCE LINE POSITION
Figure 8. Reference Line Position
SWR OMM
7
