HP 8559A - 5-53

MODEL 8559A
ADJUSTMENTS
ADJUSTMENTS
5 - 26. SECOND CONVERTER ADJUSTMENTS (Cont'd)
THESE POINTS SHOULD BE AT
SAME AMPLITUDE
WITH BANDPASS
>17 MHz WIDE 1 dB DOWN AS SHOWN
r
- 3.75 DIV
1
+3.75 DIV
THESE POINTS SHOULD BE AT
SAME AMPLITUDE LEVEL
k0.4 dB
7
ALTERNATE
IF
.
REGULAR
IF
a. TYPICAL BANDPASS RESPONSE
b. COMPOSITE PHOTO SHOWING LOCATION
OF IF SIGNALS
C . ROLL - OFF AT HIGH - END OF RESPONSE
d.
ROLL
- OFF AT LOW - END OF RESPONSE
AF1 AND AF2 MUST BE 21 MHz BUT S4 MHz
AF1 MUST EQUAL AF2 20.2 MHz
FIGURE 5 - 13.
FIRST IF
BANDPASS FILTER RESPONSE