HP 8562E - Page 421

The HSCAN signal uses Q2 to reset the ramp. Q2 shorts the integrator and sets its output
nominally to ground.
--------m---
I
Al4 FREQUENCY
,CONTROL ASSEMBLY
1
All
YTO
I
FRAC N +
L
PLL
-----
J301
sll21e
A
J304
FRAC N TEST
APPROX -10
dh
60 TO 96 MHz
SAMPLER IF
-10 TO
+5 d&n
60 TO 96 MHz
(
-----
1
A7 SWITCHED LO
IDIST AMPLIFIER
I
I
-1; - -
I
I
m-----I
J5 14.5 TO 18.5 dE!m
__) 1ST LO OUT
TO FRONT PANEL
J2 13 TO 16 dBn
----+ LOW BAND MIXER OUT
TO A8
J3 13 TO 16
d&n
----+ HIGH BAND MIXER OUT
TO A10
J4 -9 TO -2 d&n
---------
3 TO 6.8
GHz
SAMPLER OUT
;
TO A15
I
w34
BLACK
W32
:RAY/VIOLET
JlO
/
WHEN LOCKED, SAME
AS FRACTIONAL N FREO
10 MHz
APPROX
OdaTl
4
J30
w37
GRAY/GREEN
600
MHz
APPROX 0 dh
TO Al3
SECOND
CONVERTER
J305
4
w49
$?I O;!q
I
(DELETED
I
OPT’y03)
I
I
0
I
1
I
---v--J
Figure 1 l- 10. Simplified Synthesizer Section
Synthesizer Section 11-47