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Model 4277A
SECTION IV
5. The values displayed on DISPLAY A and DISPLAY B should be within the
following test limits:
DISPLAY A:
0.0020
to
0.0048
DISPLAY B: -0.0020 to -0.0048
6. Set the test frequency to lOOkHz and repeat step 5.
7. Set the test frequency to IMHz and repeat step 5.
8. Press the FREQUBNCY/DC BIAS step control @ key to select self test item 9.
9. Press the FREQUENCY/DC BIAS selector key and set the 4277A controls as
listed in step 2. Leave the SELF TEST function set to on.
10. The values displayed on DISPLAY A and DISPLAY B should be within the
following test limits:
DISPLAY A: -0.9990 to -1.0010
DISPLAY B: -0.0010 to
0.0010
11. Set the TEST SIG LEVEL and MEAS SPEED in accordance with Table 4-4, and
verify that the displayed values are within the test limits given in the table.
Table 4-4. Self-operating Test (Item 9)
Test Limits
Measurement Speed
MED
FAST
Test Signal Level
Display A
Display B
Display A
Display B
High
-llO.OOlO
0+0.0010
-llO.OOSO
0±0.0050
Low
-i±0.0020
0±0.0020
-1+0.0100
0+0.0100
12. Set the test frequency to lOOkHz and IMHz, and repeat steps 10 and 11 for
each frequency.
13. Press the SELF TEST key to release the self test function, and set the 4277A's
controls as follows:
Test frequency ..
TEST SIG LEVEL ...
MEAS SPEED .
TRIGGER .
DISPLAY A function
DISPLAY B function
C RANGE .
DC BIAS switch
.
CABLE LENGTH ....
Other controls
IMHz
HIGH
MED
INT
C
G
IpF
OFF
0
Any setting
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