Specifications

3-4 NON-RATIO
PARAMETER TEST
(MS462XA/C/D)
One of the most useful tests for troubleshooting RF component problems
in the Receiver Module is the non-ratio parameter test. This test verifies
that each individual receiver channel operates properly as well as pro
-
vides clues to where a problem is located.
NOTE
The non-ratio parameter test is not available for the
MS462XC.
Test Setup: Connect the test equipment as described below.
q
Connect Ports 1 and 2 together using a high quality throughline.
q
Press the Default key, then the 0 key to reset the MS462XX to its
factory-default settings.
Test Procedure: Display the non-ratio parameters as follows:
1. Press the Display key and select:
GRAPH TYPE
LOG MAGNITUDE
RETURN
SCALE
RESOLUTION
5X1
RETURN
DISPLAY MODE
SINGLE CHANNEL
2. Press the Meas key and select:
S21, TRANS b2/a1
USER DEFINED
3. Press S21/USER X to activate USER X.
USER X becomes red (the actual user number “X” is not significant).
4. Select:
CHANGE RATIO
a1 (Ra) as the numerator
1 (UNITY) as the denominator
5. For the model under test, ensure that the minimum value of the RF
display is greater than the minimum level shown for a1/1 in Ta
-
ble 3-1 (page 3-8). Figure 3-2 on page 3-9 shows an example of a typ
-
ical non-ratio display.
PERFORMANCE TESTS NON-RATIO PARAMETER TEST (MS462XA/C/D)
MS462XX MM 3-7