HP 8340A Service Manual page 193

0 =
0.6 =
PRE TUNE
DAC
(BLOCK D)
IOV
SWEEP
RAMP
FROM
OV
0.6MHz
A68
Figure
8-266
Model 8340A - Service
SENSITIVITY
,------------
1
I
I
I I= I 6mA@-300KHz
•
I=O, 76mA ®I 50KHz
I
160MHz
I
IOOMHz
I
I
I
0 TO
0.25mA
I swEEP
6MHz
-7V
'--- -- - N ON-INVERTING ____ __ __/
______________________________________ J
Simplified
8C-33.
Scans by HB9HCA and HB9FSX
SAMPLE
AND
HOLD
FINE ADJ
300KHz
ADJ
DISCRIMINATOR
BLOCK A AND B
l o (AVG>:::: :: :: 6mA/MHz
TP6
vco
TUNE
VOLTAGE
INTEGRATOR '-- TO CURRENT ____ __ _/
C ONVERTER
Discriminator Diagram
A43 PLL2
IOMHz REF
FROM VCXO
l
I
vco I
TO PLL I
160MHz AND
I
TO PLL3
75MHz I
J
ADJ
A40 PLL2 VCO