HP 8663A manual 444. A3A10 FM Sum Loop Phase Detector Schematic

R30

20 MHz

LOW-PASS

FILTER

C23

loop

l

LID

680n

L9

P/0 A3AII

FM SUM LOOP

P/0 PHASE ERROR

XA3AIO SIGNAL TO FM SUM

DN LOOP MIXER

14), IDPo 24

R

NOTES

I . REFER TO TABLE 8-102 FOR SCHEMATI C DIAGRAM NOTES.

2.TROUBLESHOOTING VALUES ARE TYPICAL . THEY ARE ACTUAL MEASURED VALUES. YOUR MEASUREMENTS MAY BE SLIGHTLY DIFFERENT THAN WHAT IS SHOWN.

3.ASTERISK(*- ) INDICATES THAT THESE PARTS ARE SELECTED IN TEST . THE VALUES SHOWN ARE TYPICAL ONLY.

REFER TO SECTION V FOR PROCEDURE

4.LOGICS FOR ECL DEVICES IN THIS INSTRUMENT ARE NONSTANDARD DUE TO

THE SUPPLY VOLTAGE USED . A HIGH

LEVEL IS >4 .OV, A LOW LEVEL IS <+3 .5V

51 .1

330n C24 4TP

L C22

47p

V

J4

' < 3

REFERENCE DESIGNATIONS

NO PREFIX A3AI0

		CI-24
	33,52 2	DSI
		JI
	A3AII	LI-10
		QI-5
		RI-43
	J2 4	TPI,2
		UI 4
	TP IO
	XA3A 10
		LOGIC LEVELS
		TTL	ECL
			(NOTE 4)
	HIGH	>+2V	>+4 .OV
	LOW	<+0 .8V	<+3 .5V
P/0	< IS MORE NEG . THAN
	> IS MORE POS . THAN
W52
n	OPEN	HIGH	LOW
	1AA~62	LOW	HIGH
v	GROUND

INTEGRATED CIRCUIT

VOLTAGE AND

GROUND CONNECTIONS

REFERENCE PIN

DESIGNATIONS NUMBERS

FM SUM LOOP

OUT-OF-LOCK (STATUS *05) TO DCU

TRANSISTOR AND

INTEGRATED CIRCUIT

PART NUMBERS

REFERENCE	PART
DESIGNATIONS	NUMBERS
QI,3	1854-0345
Q2,5	1854-0404
Q4	1853-0007
UI	1820-1344
U2	0955-0095
U3	1826-0191
U4	1820-0803

	+0 .3Vdc NORMALLY
IF (Jl)	FREQUENCY ERROR SIGNAL
>20 MHz	SQUARE WAVE*
	+0 .3 TO +0 .9Vdc
<20 MHz	SQUARE WAVE*
	+0 .3 TO -I .2Vdc

*RATE IS PROPORTIONAL TO 4 F OF IF SIGNAL FROM 20MHz

UI	+5V		1,14	A3AIOU2
			7	MIXER
				BOTTOM VIEW
			BLUE
			BEAD
U4	+5V	-	1,16

•-8

CIRCUIT

A3AIDU3 BOARD

TOP VIEW TOP VIEW

CIRCUIT				CIRCUIT
BOARD		A3AIOU4		BOARD
TOP VIEW		TOP VIEW		TOP VIEW
I q	014			16 10	016
KEY-'O 0		•	•	KEY-10	0
q	0		0	0
q	0 ' 0 0
q	0		0	0
q	0		0	0
70 08				0	0

SERVICEA3A10SHEET 2 5

Figure 8-444. A3A10 FM Sum Loop Phase Detector Schematic

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