Filter
Top Products
Step 3. Press the ENTER key to select the measurement mode.
Selecting the Frequency Range
The following procedure selects the frequency range for the calibration.
Step 4. Press the
FREQ/DIST key.
Step 5. Press the
F1 soft key.
Step 6. Enter 6, 2, 5 or a user-defined frequency using the key pad or the Up/Down ar-
row key.
Step 7. Press
ENTER to set F1 to 625 MHz or the user-defined frequency.
Step 8. Press the
F2 soft key.
Step 9. Enter 2, 5, 0, 0 or a user-defined frequency using the keypad or the Up/Down ar
-
row key.
Step 10. Press
ENTER to set F2 to 2500 MHz or the user-defined frequency.
Step 11. Check that the FREQ (MHz) scale in the display area indicates the new fre
-
quency start and stop values (for example: F1 = 625 MHz, F2 = 2500 MHz).
Performing a Calibration
The following procedures detail how to perform the calibrations. Steps 12 through 15 de
-
scribe OSL calibration, while steps 16 and 17 apply only to OSLT calibration.
Step 12. Press the
START CAL key. The message “CONNECT OPEN TO RF OUT
PORT” will appear in the display.
Step 13. Connect the calibrated Open and press the
ENTER key. The messages “Mea
-
suring OPEN” and “CONNECT SHORT TO RF OUT” will appear.
Step 14. Remove the Open, connect the calibrated Short and press the
ENTER key. The
messages “MEASURING SHORT” and “CONNECT LOAD TO RF OUT” will
appear.
4-3
Chapter 4 Measurements
HOLD
RUN
START
CAL
AUTO
SCALE
SAVE
SETUP
RECALL
SETUP
LIMIT
MARKER
SAVE
DISPLAY
RECALL
DISPLAY
PRINT
MODE
FREQ/DIST
AMPLITUDE
SWEEP
SYS
ENTER
CLEAR
ESCAPE
ON
OFF
/
1
2
4
5
6
7
8
9
0
3
+
-
.
Site Master S251B
625.0
2500.0
1384.45 MHz
2096.66 MHz
LOAD
OPEN
LOAD
SHORT
RF OUT TEST PORT
RF IN TEST PORT
TEST PORT CABLE
(OPTIONAL)
TEST PORT CABLE
(OPTIONAL)
Figure 4-2. Two-Port Measurement Calibration Setup