HP 8340A Service Manual page 251

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TP 10 TP I TPJ TPB TP9 TP? TPT TP�
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SAMPLER
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A50
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A49 A49
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A49 YO LOOP PHASE DETECTOR
0634ci-60180
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IF LIMITER
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7(MHZ
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DIFFERENTIAL AMPLIFIER
+ 15VF
PHASE/FREQUENCY OETECTOR
®
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LOOP I NTEGRATOOS
5110
R 12 Rl3
346 348
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LOGIC INVERTER/TRANSLATOR
+20VF
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Scans by HB9HCA and HB9FSX
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1000
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+20\IF
HIGH PASS
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+ 20Vf
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Figure BD-11.
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NOHS:
I.
RHFR TD THE SERVICE SECTION
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FOR ET ILE D
IN7RODUCTION SCHEMA71C
DIAGRM,O SYMB OLOOY NOTES.
2. RESlSTANCF. ·�ALU£S SHOWN ARE IN OHMS,
CAPACJTANCf. lN l,IJCRO�ARMlS, Ahl()
INOUClANCE IN MJCROHENRHS UNLESS
'
OTHERWISE NOTED.
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3. NOT ASSIGNED.
A4�J?
YO TUNE
4. ASOCB-15 CENTER CONOUnORS AR ELEC­
JO ASS ro ORlVER rnlCALLY CONNECTED TO THE A•!9 PC
IVIA A62-J61
BOAR•J THROUGl-1 SOLDERED 2� GAUGE
ourrn
fl�E WIRE. THEIR CONDUCTORS
ARE ELECTRJCALLY CONNEC7EO TO PC
DOARO GROUNO ANO CHASSIS GROUND
TllROUG l l !.l�CHANlCAL CONNECTIONS
IN THE ASSEMBLY MOUNTING HARO�ARE.
H
�. J
9 I -4 CENTER CONDUCTORS ARE ELEC·
TRltALLr CONNECTED .ro THE A49 Pt
BOAR!l THROUGH SOLOEREU 24 GAUGE
flNE 1'1RES. A49JI ,2 OUTER CONDUCTORS
ARE Al.SD Et.EtrRICALLY tomiF.cno TO
THC M9
PC BOARD GROUNU PLANE
THROUGH SOLDERED ]4 GAUGE FINE
IURES. A•�J3.4 OUTER CONDUCTORS ARE
El.ECTRICM.LY CONNECTED TO PC BOARD
GROUND AND CHA55l5 GROUND THROUGh
W
MECHMHC�L CONNECTION� THE
ASSEMBLY l,IOUNTlNG HAROllARE.
6. M�Jl-4 ftITfl Tilt
AU NOT INClUOEO
A49!08340-6003 11 ASSEl.ISLY.
T.
7HE A49 ASSEl,IBL Y PC BO ARO IS GROUNDED
TO TllE YO LOOP CASTING {t!1ASSIS GROUND!
THROUGH THE �OUNT1NG HAROWARE.
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NOTE
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YO FM COil
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.YD I
l.I 3
F I 11 7 TO A44J.
YO BIAS BOARD J2
2
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A50 �� LOOP
P/O INTERCONNECT
+5.2VF
LOOP R4
UNLOCKED 511
+5.2.VF ..... ,.,
I
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RS UlB U C
I
K r2 r10 P 1
A� w
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---- - 3.9 DIGITAL
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PIN �O
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A49 YO Loop Phase Detector and ASO YO Loop Interconnec• Schematic Diagram
8-335/8-336