HP 8340A Service Manual page 15

10MHz REFERENCE LOOP (A29, A30)
100MHz
FREQUENCY
(A51)
20MHz
10MHz
20/30 LOOP (A36-A43)
PLL1
Pll2 20/30
OUTPUT
---- -- --, , 10MHZ 2 H/F
,�--- -- -- -
f
10MHz
Ni
20 f
SAMPLE f 100MHz
/HOLD
DISCR
H/F
N2
f
ZIF
r'\..J
PLL3
'\._, )-4-1 <: S
___/
'--- -
20/30
SWP DB0-11
POWER SUPPLIES (A19, A35, A52, A53, A56)
+20V _ _ _
�22V
UNREG
SUPPL
y
CURRENT
START UP
�;;�
y
CHED
1-Rf.F +12V
I
PROCESSOR (A60)
I
•5V
SUPPL
CLOCK
UN REG +5. 2V
I
y
I
-:!OV
I
OV MEMORY
UNREG
SUPPL
DECODING/ TEST JNDICATOR/
l MEMORY DSA
y
:
-5. 2V
SUPPLY
I
I
ENCODER
-40V
UN REG
l5V
-t5V
SUPPL Y
M/N LOOP (A31, A32, A33)
400
2 SAMPLER
'"'
f
20-30MHz
IF
20/30 INPUT
¢/F
OET
20
N
""'
M (B0-4)
t N (60-5)
YO PRETUNE/DELAY COMPENSATION
(A54)
PRETUNE
DAO
V O L T A G E
CE : 1- - -
R E F E R E N
DB0-15
RETRACE
SWEEP GENERATOR (A58)
BVSWP
RESET
OAC
VSWP
SWEEP SCALING RAMP SWEEP
TIME RESISTORS GENERATOR WIDTH
os o-15
20/30 SWP
SWEEP SWEEP
CONTROL CONTROL
LOGJ C
1>1KR RAl-1P
ADDRESS BUS
I/0
PROCESSOR
1-1
����
FREE
DSA BUFFERS
"
I ::ER��CE
Scans by HB9HCA and HB9FSX
RF SECTION/MICROCIRCUITS (A8-A18, A20, A21, A24-A28, A63, AT1)
YO Rf
OIA i5dB OUTPUT YO RF INPUT MODULATOR
LPF
CPLA ATTEN SPLITTER
3.71 - 6.tGHz
MAIN COIL
PULSE
FM MODULATOR
COIL
SAMPLE
PULSE
MO�GLE
INDICATOR
INTERFACE
SYTM
DRIVER
MAIN YO
COIL TUNE
YO DRIVER
DRIVE
(A55)
MARKER/BANDCROSS
TRIGGER ___. .J C o N TROL
L
SWEEP COMPARATOR
DAT A SilEEP
BUS EVENT
MEMORY 0-10V
MKR AMP
P : 1- -.,. , ---
g6�
MANUAL
DATA SWEEP
BUS
OAC
DB 0-15
DIGITAL INTERFACE (A59)
SIOB - µPROCESSOR �A/W
ADA R/W STROBES -y"STROBES
0-4
HX REF
DB0-15
AOR0-4
MOTHERBOARD
( A61)
AUX OUT
(REAR PANEL ' )
POWER ISOLATOR
flPlP
DIR STEP
AF OUTPUT
' J YTl- I 1>--<>< CPLA
ATTEN 0.01 TO 26.5GHz
HI
LPF MIXER AMPL
BAND
DET
DETECTOR
ALC DETECTOR LEVEL ATTEN DA/
ALC MODULATOR CONTROL SAD BIAS
-0. 25V /Gl1z
REAR PANEL
AXIS
CRT
PENLIFT
I<
z
Z NEG BL
BLANKING
READ STATUS 1 1- - - -1,.DATA BUS
TRIGGER
10MH2 REF
HP-lB BUS
B410C INTERFACE
B755 INTERFACE
RF SWP
SWEEP OUT
FRONT PANEL SWP
tV/GHz OUT
M (B0-4)
N (B0-5)
DB0-5
0810-15
CHANGE HPUP PROCESSOR LSTP
DETECTORS SAG LSR!I
FRONT PANEL (A1-A3, A5-A7)
DJSPLAVS DISPLAYS
DISPLA'f'
µPROCESSOR
KEYBOARD
Figure 8A-2. Model 8340A Block Diagram
RPG
POWER
SNITCH
8-13/8-14