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 amplituderemains 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 5-11.

TABLE 5-11. REF LEVELCONTROLCHECK

Reference Level

Attenuator

Deviation From

(dBm)

(dB)

Reference (700 +20 mV)

 

 

 

 

 

 

0

0

Reference

mV

1

0

10

Reference +40 mV

2

0

20

Reference 240 mV

-30

30

Reference +40 mV

-40

40

Reference +40 mV

-50

50

Reference 240 mV

 

 

 

 

 

18.Reconnect AlOW 1to A5J2.

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.