Keysight Technologies E8257D Service Manual page 167

FM FM
PRESTO
ADC DAC
FM Input
from MOD
GEN
2-4 GHz
ESOT
BOARD
(A11)
FN Loop
50 MHz
20
-
+
Step Generator
2
X2
X2
1.0 GHz
From
REFERENCE
BOARD (A7)
A45 FRAC-N BOARD
1-2 GHz
X2
16
Mode A
Mode B
VCO
8
62.5 MHz or 187.5 MHz
DC
1.5GHz
F
STEP
0.5GHz
1 GHz
2GHz
8GHz
X2
4GHz
A46 OFFSET BOARD
F
YOL_REF
F Mode A
FN
Mode B 62.5 to
125 MHz
F
OSL_REF
3187.5 to 1062.5 MHz
(N x 500 +/- 62.5/187.5 MHz)
F
-
OSL_IF
+
Block Diagram for Option UNY, Service Guide E8251-90359
A9 YIG
DRIVER
BOARD
F
-
YOL_IF
+
YIG Loop
3200 to 10000 MHz
F
COMB
VCO/Multiply
2.5-5 GHz
X2
Offset Loop
(prefix >US5042/MY5042/SG5042)
A28
F
YIG
YIG