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MODEL 8559A ADJUSTMENTS
ADJUSTMENTS
5
-
24. STEP GAIN ADJUSTMENTS (Cont'd)
NOTE
Some video filtering might help reduce noise. Set VIDEO FILTER control so
noise is reduced, but the signal amplitude remains unchanged.
16.
Adjust
A12R29
40
D
adjustment for signal level one division from top graticule line.
17.
Check REF
LEVEL
dBm control from 0 to
-
50 as shown in Table 5-1 1.
18.
Reconnect
AlOW 1 to A5J2.
TABLE 5-1 1.
REF LEVEL CONTROL CHECK
When reconnecting A1OW1 to A5J2, exercise caution. The connector should
not be torqued to more than
6
inch
-
pounds; otherwise, damage to A5J2 will
result.
Deviation From
Reference (700
+20
mV)
Reference
mV
Reference
+40
mV
Reference
240
mV
Reference
+40
mV
Reference
+40
mV
Reference
240
mV
Reference Level
(dBm)
0
10
2 0
-
30
-
40
-
50
Attenuator
(dB)
0
10
20
30
40
5
0