LeCroy 9450 User manual

9450 DIGITAL OSCILLOSCOPE
SERVICE MANUAL
North American Headquarters:
LeCROY Corporation
700 Chestnut Ridge Road
Chestnut Ridge, NY 10977-6499
U.S.A.
Tel: [phone]
European Headquarters:
LeCROY S.A.
P.0. Box 341
2, rue du Pre-de-la-Fontaine
1217 Meyrin 1 / Geneva
Switzerland
Tel: [phone]
Version 0.5
October 1990

ACKNOWLEDGEMENTS
We would like to thank Texas Instruments, Motorola and Signal
Processing Technologies (Honeywell) for their kind permission in
allowing us to reproduce drawings from their technical literature.

INDEX
Specifications
Basic Operation and Block Diagrams
Basic Performance Test Procedure
and
Internal Diagnostics and Calibration
Service Information and Procedures
Mechanical Drawings
Circuit Diagrams
Parts List

SPECIFICATIONS

BASIC OPERATION
AND
BLOCK DIAGRAMS

9450 SUB-ASSEMBLIES
9450-1 Base Board
9450-2 Display
-3A ADC
-4 Time base
-5 Front panel
-6 Processor (compatible with 9420-6)
-7 Front-end
-8 Clock bus
9451-1 Power supply

DECODER
PBL.
PERIPH. 9450-1 CU5T PORT CONTROL
DECODER
PRL
CUSTOMER PORT
36
-BO BD >»•-
CONTROL
PRL
01 SPLAT
STNC
3ER NO.
PRL
9450-11 B450-3P
_1B I.
13 22 1
.MIA
12 M2A .
12
PROCESSOR DISPLAY
HCL494
SAMPLE tHOLD
PROCESSOR
5AD
3'EN
9450-7
FRONT ENO HUU
1.5sac if
POWER ON •!
PRESS 15«qc i
LIKE POHER ON
TIL BEEP »
ERRSE NON-VOLATILE RRH
POHER SUPPLY
RS 232 PORT
8REAO
OVL
FROM 9450-6
5Rfl 3_3SRA
SDFE ^
WRITE SDFE
SHFE SERIAL SHFE
TRFE CONTROL fTRFE
94S0-7
FRONT ENO
MTia. 1111 MUM It Ml MU IWCtfT «UDMT CMP
IT CMTtIM ptsmilTMT HFMM1IM Ml ll IUMIIMI
It! T* IMUSTMIIM Ml II 11 IIT ID KUKO, 011-
ara m*mb» umi urn iinait me irmc
CORPORATION
3CHCIMTIC DIOBIUm
9450-1
DWG NOt 9CHEHH-6LOC
KflOUJMKI-l
f
:«KO
HAUSRHNRMN'R

MV R^CULfpON MILL IE TUANEB..OFF If I
-t*i5VI-l-i5V. DAOP Hone THAN BV OH *5V 0H0P5 HOAE THAN IV
-CAiHOQL VuLTACE OAOPS MORE THAN IB VFDA HOAE THHN 2SB US
BUT NOT AT AESET

‘bh (2) ‘br m.5i

MDX +RCQ MEMORY
^IlORTINl ADMXCK5 ADMXCK13
°IIOhXCKl 0HXCK9 OflTfl RCO DUE RDC1 B R HE CE RQR
scHcjtfliic annwi
9450-30
OHG NO) 3CHENR-9LOC

ADC Numbering Scheme
Reference ==>
First in time ==>
HARD
4
1
2
3
SOFT (Internal Diag)
3
0
1
2
The reference ADC is used in Single-ADC Sampling Mode.

9450 SAMPLING CLOCK RATES vs TIME/DIV
Single-shot:
INT OSC Sampl Rate Sample Intvl S/H CLK #ADC Time/div
MHz Ms/sec nsec MHz
200 400 2.5 100 410 nsec
100 200 5.0 50 420 ysec
200 100 10.0 100 150 ysec
80 40 25 40 1.1 msec
80 20 50 40 1.2 msec
80 10 100 40 1.5 msec
80 4250 40 11msec
80 2500 40 12msec
80 1
•
1000 40 15msec
•
•
80
•
1Hz 1sec 40 15ksec
RIS:
INT OSC
MHz Sampl Rate
Ms/sec Equiv Rate
Gs/sec Sampl Intvl S/H CLK
MHz #ADC Time/div
200 100 10 100 psec 100 11nsec
200 100 4250 psec 100 11ysec
200 100 2500 psec 100 12ysec
200 100 11nsec 100 15ysec

MOOUT MEM 51 *E5EL 5H F
-PR0R/DflnN
"»RESET _
CKln HORST
(BRS)
SHNX
I
sonn
4SREP
I4SSPEfl
6k6UKx8
128
250
512
nun
L". 1 1 "11-1
POHEfl m»RESET
SENSE —RESIN
50Q na«o POHEfl ON DELAY
r. u1
1
12
1r- i
20
Is
OHflH
CONTROL CD
kncpwtic omen**
*9450-6
misiEai
DWG NDl SCHElW-BLOC

CRL OUT
CRL SENSE.
0—
IUT |[-I
'St /I ut
CRL SENSE 1
HI ZOFFSET
EXT TRIG
^IN 0HH5
HIGH PRESICION
RTTENURTOR
0
.OC,
Ilfrej
HFREJ
.
CRL RNRLOG
CRL SENSE 2
OOD/EVEN
VERT SYNC
HOR STNC
TO 9450-11
TOC VTH TRIG EXT 1
VRfl GRIN CHI -
50 OFFSET CHI -
HZ OFFSET Chl<
VTH TRIG CHI *
VRR GRIN CH2 ‘
50 OFFSET CH2
HZ OFFSET CH2<
VTH TRIG CH2
«
RNRLOG
CONTROL
3R
RNR ORC OUT
2EN
TO 9150-1
ORSE BORRO
DIGITAL
CONTROL
in in :» nim -•
“i °i °i °i °i “i
EXT TRIG
SHIFT REG
j-ioinsnNH
NnSICCIIlt
*_J I_1 _l _» I
t- uj uuuiii u
i-Kircccia: SRRB
SRRI
maLOiiju
ct:r«iuki]a
cc cmu. 0 u a
i«alu yt-
tc. V<C CN.
I- UII IL IV
a. _i xx
j-uwjnnln
SN. 1-H-V-H- 1-V.
rwt/icECEcrqrcccz
Kitcmric omswm
txnuwiin l9450-7
OHC NOl SCHEMA-BLOC
IPMPBhim., iin

HII400
RANGE FS OFFSET
[mV] [mV] lOv =600 m\
540 ±600 mV
10 80 ±300 mV
20 160 ±150 mV
50 400 ih 375 mV
100 800 ±750 mV
200 1600 ±1500 mV
500 4000 ±3750 mV
1000 8000 ±7500 mV
OFF ±40
OFF ±80
ON ±80
HIV 401

MODEL 9451-1 POWER SUPPLY
Specifications
Input voltage:
Input frequeny:
Inrush current:
Operating temperature range:
Hold-up time:
Conducting EMI:
Isolation:
90 to 132 VAC ,180 to 264 VAC ,
selected by the user
45 to 440 Hz
max. 10 Aat start-up
0° Cto 65° Cat full load
min. 20 msec, at full load and minimal input
VDE 0871 curve B, IEC 801
VDE 0411/0730/0804/0806, IEC 348/380/435
3750 VAC ,4000 VDC
input lines to ground leakage current
<5 mAA£, 50 Hz
Input over-voltage protection:
Outputs:
Output voltage:
Output voltage adjustment:
Output over-voltage protection:
Line regulation:
Output voltage regulation:
Transient response (100 Hz):
yes
four, with common return (ground)
out 1, +15 V: +15.00 V±1%, nom. 3.2 ARM<,
out 2, -15 V: -15.04 V±1%, nom. 3.8 AR^g
out 3, +5 V: +5.07 V±1%, nom. 8.6 ARMg
out 4, -5 V: -5.16 V±1%, nom. 10.8 AR^g
min. +5
%
no
max. 0.1% at any load
+15 Vand -15 V: ±1% 1.5 Ato 4.5 Aload
+5 V: ±1% 6Ato 11 Aload
-5 V: ±1% 9Ato 13 Aload
+15 Vand -15 V: <0.5 V, 500 ysec: 2Ato
4.5 A
+5V: <0.2 V, 500 ysec: 6Ato 11 A