HP 8110A User manual

The test & measurement
equipment you need at
the price you want.
Alltest carries the world’s largest selection of
used/refurbished benchtop test & measurement
equipment at 50% the price of new.
O
Our equipment is guaranteed working, warrantied, and
available with certified calibration from our in-house staff
of technicians and engineers.
• 10+ full time technicians with over 150 years of
specialization
• 90 day warranty & 5 day right of return on all
equipment
•
• 1-3 year warranties for new and
premium-refurbished equipment
• Every unit tested to OEM specifications
• Satisfaction guaranteed
You have plans, we will help you achieve them.
Any project. Any budget.
Get a quote today!
CCall [phone] or email [e-mail].
t
Alltest Instruments, Inc.
500 Central Ave.
Farmingdale, NJ 07727
P: [phone]
F: [phone]
alltest.net
s
[e-mail]

Service
Gui de
HP
8110 Α 150
MH z P ulse
Generator
OTS LIBRARY
ΟΤ S
L I BR A R Y
ιιιιιιιιιιαιιιιυιιιιιιιιιιιυιιιιιιιι
b ιιιιιιιιιιιι
2400011807
HEWLETT
1 4 0
PACKARD

Copyright

Wa rn
ing

Safety S ym bo l s
©1993
H ewlett- P ac k ard Gmb H .

B e f
ore turning on t he instr u ment,
you
H errenberge
τ Str . 130

must
connect t h e p rotective eart h
71034 B 6 blingen

terminal o f t h e instrument to
t
h
e
Federal R e p ub l ic ο1 Germany

p rotective eart h
conductor of th e ( m ains)

In struction
Manual symbol : The
power cord . Th
e mains pl ug must only be

instrument is m ar k ed wit h
this symbol
All R ig h ts Reserved .
R ep roductio n ,

inserte d in α
soc k et out l et wit h α

w h en it is necessary
f
or
you to refer to the
adaptation or translation
wit h out prior

protective
eart h contact . D o not negate

instruction manual in order
to protect
exce p t as

th e pro t ec tive
action 6 γ using an

against da m age to
t he instrument .
written p
ermissio n is p ro h ibited,
al
l
owe
d under t h e co p yr i g ht laws .

exte n sion
p ower cord w i t h out α p rotect i
ve
grou nd ing condu ctor . Grounding one
conductor o f α
two-conductor out l et is not
sufficie n t protection .

P rotecte d conductor sy m
bo l
W arrant y
Th e i nf ormat i
on conta in ed in this
docu m ent is su
b j ect to c h arge wit h out
notice .
H ew l ett- P ac
k ard ma k es no wa r ranty
of any ki nd wi t h rega
r
d to
t hi s
mater i a l , i ncl u d i ng, butnot l imi
ted
to, the im pl i ed warrant i es or
merc h ant ib i l i ty and fit
n ess for α
p art i cu l ar pu r p ose .
Hewlett- P ac k ard s h all not
be l iab l e for
errors contained h erei n or for
in c id en ta l or
conse q ue n tia l damages in co
n nection w i th
t h e f urnis h ing, p
er f or m ance, or u se o ft his
materia l .
Co mp l ete p roduct warra nty in f ormation
is
given in t h e U ser Guide .
Sa f et y
Th is is α Sa f ety C
l ass
I instrument
( p rovided wit h termi n al for p rotective
eart h ing) . B e f ore app l yi n g p ower, verify
th at t he correct sa f
ety p recautionsare
ta k en (see t h e f ollow in g
war n i n gs) . In
ad d ition, note t h e external mar kings on
t h e instrument t
hat are descri b ed u n der
Sa f et y Sy m
bols . D o not operate the
instrument with
its covers removed .
R e pl ace f use only wit h s p ecified type .
Service instructions are for trained
service
personnel . To
avo i d dangerous electric
s h oc k , do not p er f orm any service un
l ess
qu a li fied to
do so . D o not atte mp t
i n ter nal serv i ce
or ad just m e nt unl ess
anot h er person, ca p ab l e of rendering first
aid and resuscitation, is present .
Ι! you energize
t h is in strument using an
auto-transformer
(for voltage reduction)
m ake sure t h
at th e com m o ntermin a l is
connected to
t h e eart h terminal of t h e
p ower source .
W h enever it is li k ely
t h at t h e grou n d
protection is impaired, you
must m a k e th e
instrument inoperative and
secure it
against any unintended
op eration .
D onot
operate t h e in str ume n t i n t h e
presence of flam m ab le gases or f u m es
.
Operation of any
electrical instrument in
suc
h
an
environment co nstit u tes a definite
sa f ety h azard .
D o not
instal ls u b stitute p arts or p erfor m
any
unaut h orized modification to the
instrument .
Capacitors inside th e i n
stru m ent m ay
retain α c h argeeven if
t h e instr um ent
is
disconnected f rom its source o f
supply-
WARNING
Th e Warning symbo l calls
attention to α
p rocedure, p ractice, or
t h e li ke, w h ic h , i f
not
correct l y per f or m ed or a
dh ere d to,
could
resu l t in personal in j ury or loss o
f
li
f e . D o
not
p roceed beyond
α W arning
sy m bol
un ti l t he indicated co n
ditio n s are
f ul l y understoo d and met
.
CA UTI O N
The Ca u tio n sy m bo l calls
attentio n
to
α
proce d ure, p ractice,
or t h e li k e, w hich , if
not correctly p er f or m
ed or ad h ered to,
cou l d resu l t i n damage
to or destruction of
part or all o f t he
equipment . D o not
proceed beyond α Ca u
tion symbo l unti l
t h e i nd icate d co nd itio ns
are
fully
understood a nd
met .

W arranty

L imitation
ο £ W arranty

Certification
This
Hewlett-Packard product has

The
foregoing warranty shall not

H
ewlett-Packard Company certifies
α warranty again st defects in

apply to de f ects resulting fro m
t hat t h is product met its p ublis h ed
material a nd workmanship for α

improper or inadequate

specifications at t he time of
period of one year from date of

maintenance by the Buyer,

s hipment . H ewlett-Packard f urther
shipment . During the warranty

Buyer-supplied
software or

ce r
tifies that its cali bration
period, Hewlett-Packard Company

inte
τ fac ί ng,unauthorized

m
easurements a r e traceable to t he
will, at i ts option, either repair or

modification
or m isuse, operation

U nited
States I nstit u te of
replace
products
t hat p rove to be

outside of t he
environmental

Standards and T
echnology, to the
de fective
.

s p ecificat i
ons for t he product, or

extent al l owed
by t h e Institute's
improper site preparation or

calibrating f acility, and to
t he
F or warranty
service or re p ai r , this

m aintenance .

calibratio n f acilities of other
productmu
st be returned to α

I nte rnat i onal Sta n dar d
s
se r vice
facility designated by

No other warranty
is expressed o r

Organization members .
H
ewlett-Packard . The Buyer shall

implied . H ewlett-Packar
d
pay
H ewlett-Packard's round-trip

s pecifically
disclaims the implied
travel ex p enses .

warranties of
m eτ chantability and

About
this edition
fitness for αparticular pur pose .
For p roducts returne dto

HP Part Number
H ewlett-Packard for warranty

08110-91021
service, the B uyer shall prepay

E xclusive Remedies
s hipping charges to

P rinted in Germany
Hewlett-Packard a nd

The remedies supplied are the
Hewlett-Packard shall pay shipping

Buyer's sole and exclusive

Ed ition 2 .0 Ε 1293
charges to return the product to

r
emedies . Hewlett-Packard s hall

D
ecem b er 1993
the Buyer . However, t he Buyer

not
be
liable
for any d irect,
shall
pay
all shipping charges,

indirect,
special, incidental, or
duties and taxes for products

consequential d amages, whether
returned to Hewlett-Packard from

based on contract, tort or any
another co untry .

other legal
theory .
H ew l ett- P ackard warrants t h
at its
software and firmware
designated

Assistance
by
Hewlett-Packard for use with an
instrument will
execute its

Product maintenance
agreements
p rogramming
instructions when

and other customer
assistance
properly installed
on t hat

agreements are
available for
instrument
.

H ewlett-Packard
products .
H ewlett-Packard does
not warrant

For any assistance, contact your
t hat the operation of t he

nearest H ewlett-Packard Sales
instr u ment software, or firmware,

Office .
w i ll be uninterrupted or error
f
ree .
HP 8110
Α Service G u ide

HP 81 10A
Service Gui d e
A b o u t t h is b oo
k
Thi s b oo k i s
αg ui de to ser vi c in
g t h e HP 8110 Α wi
t h
all
p oss ibl
e
m
od ules in stalle d :
M odu l e
D escr ip tio
n Q uan tit y
HP 81103 Α 10 V /2
n s O u t pu t C ha nn
e l

2
HP 81106
Α PLL / E
xter n a l C l oc k
1
HP 81107
Α Mul t i c ha nn e l
D es k e w
1
If yo u r
in str um e n t does n ot h
a v e on e or m ore
o f t h ese m od ules
in stal l
ed, so m e o f t h e
descr ib ed tro ubl es h oot
in g procedu res
will n ot
b e p
oss ibl e .
I n
stall
i
ng

Lin e vo l tage, fu se and
ot h er in sta ll at
i o
n
inf ormat i o n .
S p ec i
f
i
cat
i
ons

Th e s p ec i ficat i o n
s o f t h e HP 8110 Α
and i ts m od ul es
.
Test i ng
t
he HP
8110 Α

P er f or m a n ce tests
f or c h ec kin g t h e HP
8110 Α aga in st
i ts
s p ec i ficat i on s .
Troubleshooting

T ec hniqu es f or fi nd in g
t h e ca u ses o f m
al fun ct i o n in t h
e
HP
8110 Α .
Disasse mb
ly an d R easse mb
ly
How to d
i sasse mbl e a nd
reasse mbl e t h e HP
8110 Α .
R eplacea
b le Parts

Α li st o f all
repl acea bl e p arts
in t h e HP 8110 Α .
Functional
Description

Α descr
ip t i o n o f h o w t h e in
str um e n t w or k s .

1 .

In stall in g t h e HP 8110 Α
Ini t i a l In s p ect i on .

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

1-1
P o w er R e qui re m
e n ts

.... . . . . . . .

...

1-1
... . . . ....
... . . .
....

1-1
1-2
1-2
1-3
1-3
1-3
1-3
R
e pl acin g t h e Fu se . .... . . . .
P o
w er
Ca
bl e ..... .....
V
e n t il at i o n R e qui re m e n ts

........ . .
Th ermal P rotect i on . . .......
O v er h eat in g D
etect i o n

. . . .... . . . .
F an Fa ilu re

. ..... .
. .
. .
B
atter y . . .....
. ... . . . . ..

1-4
R ack M o un
t in g A ccessor i es

. . ... .

. . . . .

1-4
In stalli ng Up
grades . .........

. . . . .

1-5
Con te n ts o f Yo u
r
Up g
r ade M od ul e(s)

.

.

.

.

.

.

.

1-5
10 V /2 n
s
O
u t pu t Ch a nn e l

...... . . . .

1-5
PLL / E
xter n al C l ock

. . ....... . ...

1-5
Mul
t i c h a nn e l D es ke w . . ....... . . . .

1-6
Th e T oo l s You N eed

... ....
. ......

1-6
R e m o vin g t h e In
str um e n t Case ... . . . . ...

1-7
In s i de t h e HP 8110
Α

.... ... . . . ....

1-9
Insta llin g t h e 10 V /2 n s O
u t pu t Ch a nn e l (HP 81103
Α )

1-10
In
stal lin g t h e PLL / Ex ter n al C l ock
(HP 81106 Α )

. .

1-10
In
stall in g t h e Mul t i c ha nn el D es ke
w (HP 81107 Α ) .

.

1-11
How to M ak e αFi r mw
are
Up
date f or HP 8110 Α

. .

1-12
S upp
orted H ar dw are

. .... . . . . ....

1-12
P
rocedu re ...... .... . . . . ....

1-12
O p
erat in g Envi ro nm e n t . .... . . . . ....

1-13
2 . Sp
ecificat i o n s
Ge n eral
. . . ....... .. .
. . . . . . .

2-1
En v i ro nm e n ta l . ..... ... . ..... .

2-1
Sa fet y . . ... .... .
... . ......

2-1
P o w er re qui re m e n ts .... ... . .

. .

...

2-1
M ax imum Dim en s i o n s (
Η χ W χ D)

.

. .

. .

.

2-1
W e i g h t ..... .
......... ..
. .

2-1
N
et . ...... .........
. . . .

2-1
Sh
ippin g .... . . ..........
.

2-1
R eca lib
rat i on p er i od

. . ...........

2-2
W arra n t y .
.... . . . ..........

2-2
A co u st i c N
o i se Emi ss i o n . . ......... .

2-2
Conte n ts- 1

D
ec l arat i on o f Co nf or mi
t y .

.

. . . . .

. . . . .

2-3
W e dec l are t h at
t h e produ ct . . . . .

. . ...

2-3
Suppl
e m e n tar y Inf
or m at i o n

. . . ..... . .

2-3
HP 8110 Α 150
MHz Pul se Ge n
erator Ma inf ra m e

. .

2-4
Timin g ..
. . . . . ....
. . . . ...
.

2-4
P er i od
.... . . ....
.... ....

2-4
Co n fig u rat i o n . . .
. . .
. . . .....
..

2-4
Ch a nn
e l A dd i t i o n

. . .... . . ....
. .

2-4
O u t pu
t Modes .... .... . . ....
. .

2-4
Pul
ses Mode .... .... . . . . .
...

2-4
Bu
rst Mode . ... . . . . . . . . .
...

2-4
P atter n M ode

. . . . . . . . .... .. .

2-5
T
r i gger Modes . . . . . . . . . . ....
. .

2-5
Con t inuou s . . . . .... . . .....
.

2-5
T r i ggered
. . . . . .... .
. . . ...
.

2-5
Gated
.... ... .....
. . . ...
.

2-5
E xter n a l Wi
dt h

. . .

.... ... ....

2-5
E
xter n a l Inpu t ... .... . . . .

..
...

2-6
... ....
.... . . ...
...

2-6
Stro
b e
O
u t pu t . ... .... . . ... .
. .

2-6
. . ...
. . . . . . ....
....

2-6
Typi ca l D e
l ay f ro m ΕΧΤ INPUT .

.

.

.

.

.

.

2-6
T r i gger O u t pu
t . . ...... . . . . ...
.

2-7
....
. . . ....
. . . . ...
.

2-7
Typi
ca l D e l ay f ro m
ΕΧΤ INPUT . .

. . .

.

.

2-7
Hum
a n In ter f ace . . . ... ... ...
...

2-7
O
v er p rogra mmin g . .... . . ...
...

2-7
W ar nin gs and E
rrors

.... . . . . . . . .

2-7
( -HELP- ) ke y

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

2-7
Me m or y
. . ... ....
. . ..... .
. .

2-7
Non-volatile m e m or y

... . ...

. .
...

2-7
Me m or y -card
. ...... . .... ...

2-7
R e m ote Co
n tro l

. . . .... . . . . . . .
.

2-8
Progra
mmin g t im es . .... . . .

. ...
.

2-8
HP 81103 Α 10
V/2 ns O u t pu t C
ha nn e l f or t h e
HP
8110 Α
..... . . . .
. . ..... .. .

2-9
Ti m in g
Para m eters . . . . . . ..... ...

2-9
Co
mm on s p ec i ficat
i
on
s

... . . ... ...

2-9
Wi dt h . ....
..... ..
... ...

2-9
D e l a y
. . . . ... ... .
. . . . . . ..

2-9
D oubl e P u l se D e l ay ... . . .... . . ..

2-9
T ra n s i t i on Ti
mes ..... . ..... ...

2-10
Ou t pu ts .....
......
. . . . . . . .

2-10
....
... .... . . .
.
....
2-10
E xter n al L oad
co mp e n sat i o n . . . . . . ...

2-10
L e ve l P ara m
eters . . . . . . . . . . . ...

2-11
Pul se P er f or m
a
n
ce

. . . . . . . . . . . ...

2-11

Overshoot
/ P res h oot, R in g in g :

.

.

.

.

.

.

.

.

2-11
C ha nn
e l Add i t i o n f ro m 48 Ω into 50 Ω

. .

. .

.

2-12
HP
81106
ΑPLL / Ex ter n a l C l ock f or
t
h
e
HP
8110 Α .

2-13
C l ock Inpu t/ PLL R ef ere
n ce Inpu t

. .... . .

2-13
Ph ase L oc
k ed Loo p . . .... ...... . .

2-13
E xter n al C l ock . ... .... ...... ..

2-14
HP 81107 Α Mul t i cha nn e l D es
k e w f or t h e HP 8110 Α

2-15
3 .

T est in g t h e HP 8110 Α
In trod u ct i on ... ... .... . . . . . . . .

3-1
Co nv e n t i o n s U sed

. . ........
...
.

3-1
T
est
R
es ul ts T ab les . . ........ . . . .

3-1
R
ecom m e n ded T est Equipm e n t a n d Accessor
i es

. .

3-2
50 O
hm, 0.1%, 10 W F eedt h ro u g h T
er
min
at i on . .

3-3
Gett in g Starte d

. ... ........ ... .

3-3
Typi cal Ex a mpl es o f Di s pl ayed
Scree n s

.

.

.

.

.

3-4
In str um e n t Ser i al Nu mbers

...... ... .

3-5
Ini t i al Set up of t h e HP 8110 Α

.

.

.

.

.

.

.

.

.

3-6
T
est 1 : Per i od . . ... . . ...... ... .

3-7
T
est
Sp
ec i ficat i on s . . ........ ... .

3-7
Equipm e n t N eeded . . ........ ... .

3-7
P rocedu re ... ... ........ ... .

3-7
T est 2 : PLL P er i od ... ........ ... .

3-10
T est Sp ec i ficat i on s

. . ........ ...
.

3-10
Equipm e n t N
eeded . . ........ ... .

3-10
P rocedu re ... ... ........ ... .

3-10
T est 3 : Wi dt h . . ... ........ ... .

3-13
T est
Sp
ec i ficat i on s . . ........ ... .

3-13
Equipm
e n t N eeded . . ........ ... .

3-13
P rocedu re ... ... ........ ... .

3-13
T est 4 : D e l ay

. . ... . . ...... ... .

3-16
T est Sp ec i ficat i on s . . . . ...... ... .

3-16
Equipm e n t N eeded . . . . ...... ... .

3-16
P rocedu re ... ... . . ...... ... .

3-16
T est
5 :
D ouble Pul se D e l ay

....... . . . .

3-20
T est Sp ec i ficat i on s . . ........ . . . .

3-20
Equipm e n t N eeded . . . . ...... ... .

3-20
P rocedu re ... ... ........ ... .

3-20
T est 6 : Ji tter

. . ... ........ ... .

3-24
T est
6 .1
α : P er i od Ji tter, In ter na l Osc ill ator

. . .

3-24
T est Sp ec i ficat i on s

. . ........ ... .

3-24
Equipm en
t
N
eeded . . .... . ... ... .

3-24
P rocedu re . . . ... ........ ... .

3-24
T est 6 .1 b : P er i od Ji tter, In ter n a l PLL (If HP 81106
Α
is in stalled) . ... .... . . . .... .

3-27
T est Sp ec i ficat i on s . . ...... ..... .

3-27
Equipm e n t N eeded . . ... ........ .

3-27
P rocedu re ... ... ..... . . . ... .

3-27
T est 6 .2 : Wi dt h Ji tter

..... . . . ... .

3-30
T est Sp ec i ficat i on s . . .... ...... . .

3-30
Equipm e n
t
N eeded . . .... . . . ... . .

3-30
Co n tents- 3

P rocedure . . . ... . . ... . ...
...

3-30
T est 6 .3 : D elay
Jitter . ....... .....

3-33
T est Specifications .... ...... ....

3-33
Equipment
N eeded . . . . . . .... ... .

3-33
P rocedure . . . ... . . . . . . .
. . ...

3-33
T est 7 : High a ndLow
Levels ..... . . . . ..

3-35
T
est Specifications . . . . ...... . . . .

3-35
Equipment
N eeded . ... ...... . . . .

3-35
P
rocedure ..... ... .....

3-36
T est 7 .1 : High Level, 50
Ohms into 50 Ohms ...

3-36
T est 7 .2 : L ow Level, 50
Ohms into 50 Ohms
...

3-38
T
est 7 .3 : High Level, 1 ΚO
hms into 50 Ohms

. .

3-39
T est 7 .4 : L ow Level, 1 ΚO
hms into 50 Ohms ...

3-41
T est 8 :
T ransition Time . . . ...... ... .

3-43
T est
Specifications .... ...... ... .

3-43
Equipment N eeded .... ...... ....

3-43
P rocedure
. .... ... ... . ... ...

3-44
T
est
8 .1
α : L eading E dge
T est

. . . ... ...

3-44
T est 8 .1b : T railing E
dge T est

. . . . . . ...

3-46
T est 8 .2 α : Min . L
eading edge f or L evel
Window
> f5V
.... . . ......
. . . ...

3-48
T est 8 .2b : Min
.Trailing edge f or L evel
Window >±5 ν

3-49
T est 9 : Pulse Aberration
Test

...... . . . .

3-50
T est Specifications . . . . ...... ... .

3-50
Equipment N eeded . . . . ...... ... .

3-50
Procedure ... ... . . ....... ...

3-50
Overshoot and Ringing

. ... . . . . . .
. .

3-51
P reshoot .... .... . . . . . . .
. . .

3-52
HP 8110 Α P
erformance T est R ecords

. . . . . . .

3-53
4 . Troubleshooting
Selftest ... .... ... ...... ....

4-2
P ower-Up Selftest

. ... ...... ....

4-2
E xtended Selftest
. . ... ...... ....

4-2
Confidence
L evel . . ... ....... ...

4-2
Microprocessor Selftest F ailure
M essages

. ...

4-2
Signal Boards Selftest . . . . . . . ... ...

4-3
P eriod B oard Selftest . . . . . . ... . ...

4-3
P eriod B oard Selftest
F ailure M essages

. . . . .

4-4
Output B oard
Selftest ... ...... ....

4-4
Output B oard
Selftest F ailure M essages . . ...

4-4
Initial Tests

. . . . . ... ....... ...

4-6
P ower
Supply Board

. .... ...... ...

4-7
Getting Started

. . . .... ... . . ...

4-8
Oscillator . . . . . . . . ... . . . . . .
.

4-9
LED Indicators

. .... .... . . . . . .

4-11
D
5401, T emperature F ail

...... . . . .

4-11
D S402, F an
Down/Overload ..... ....

4-11
R
egulators ..... ... ...... . . . .

4-12
-5 .2
V Regulator . . ... ...... . . . .

4-12
+32
VR egulator . . ... ...... . . ..

4-13

-32 VR eg
ul ator

. . ... ..........

4-13
+5 .1 VR eg ul
ator

. . . . ..........

4-13
+12 VR eg ul ator ... ... .........

4-13
-12 VR eg ul ator

... ... .........

4-14
Mi cro p rocessor Board . . .... ... . ....

4-15
Per i odB oard

..... ...... . . ...
.

4-17
T r i gger Inpu t

. .

...

.

...

.

.

.

.

.

.

.

4-17
Per i od Ge n erator ... . . ...... . ...

4-17
TI G ER Cu rre n t So u
rce . . ..........

4-17
T r i gger O u
t pu t . ..... ..........

4-17
Stro be O u
t pu t . ..... ..........

4-18
PLL B oard

. . . . . . . . ..........

4-19
On-Board R eg ul
ators . . . ..........

4-19
C l oc k Inpu t

. . . . . . . . . ..... . ..

4-19
D es ke w B oard . . . . . .... ..... . ..

4-20
O u t pu t Boar d . . . . . .... ..... . ..

4-21
O nb oard R egu
l ators

. .... ..... . . .

4-21
De l ay Ge
n erator ... .... ..... . . .

4-21
Wi dt h Ge
n erator . . . .... ..... . . .

4-21
S LAVE
I
C S
l op e Swi tc hing

. . ... . . . . .

4-22
S l op
e
Co
n tro l

.... .... ... . . . . .

4-22
Cu
rre n t So u rce ... .... . . . . . . . .

4-22
Cu rre n
tS ink .... . . .... . .....

4-22
Ver
ni er
C
u rre n ts . . . . . .... . . . . . .

4-23
Ampli
fier ... . . . . . ..........

4-23
O
u t pu t Co n tro l

. . ... ...... . ...

4-23
Offset Co n tro l . . . ... ..........

4-23
O u t pu t En a bl e . . . ... ..........

4-23
HP 8110 Α E rror Messages
a n d Stat u s R eg i ster co
n te n ts

4-24
E rror Messages . . . . ...
.........

4-24
R eg i ster U
sage . . . . . . ..........

4-51
5 .

Di sasse mbly
a n d R easse m b ly
T er m s U sed a nd Wh at Th ey M ean ........

5-2
Th e T oo l s You N eed

. . . . ..........

5-2
In s i de t h e HP 8110 Α

. . . . ..........

5-3
Se qu e n ce o f O p erat i o n
s

.

.

.

.

.

.

.

.

.

.

.

.

.

5-5
In
str u ct i o n s f or R e pl ac in g or R etrofitt in g HP
8110 Α
S u basse mbli es .... ... ........ .

5-7
R e m o vin g t h e In str um e n
t Case . . . . . ... .

5-8
R e m o vin g Boards Mo un ted on
t h e
Upp
er S i de o ft h e
Ch ass i s . ..... .... ... . ... .

5-10
R e m o vin g t h e Mi cro p rocessor
Board

. . ... .

5-11
R e m o vin g t h e P er i od Board

. . . . . . ... .

5-12
Stan dard In str um e n
ts . . . . . ..... . .

5-12
In str u me n ts wi t h Or i g in a l O p t i on s, or R
etrofitted
O p t i on s ...... . . . ..... . .

5-12
R emo ving t h e P o
w
er S upply
B oard ..... . .

5-13
R e pl ac in g or R efitt in g t h e P o
w
er S
upply B oard

5-14
R e m oving Ou t pu t Boards . ..........

5-15
In str um e n ts Fi tted wi t h O u t pu
t
1
Board Onl y . .

5-16
Co n tents- 5

In str um
en ts Fi tte d
wi t h Ou t pu t 1 B
oard and O u t pu
t
2 B oard

. . ..... .... .....
.

5-16
R
e
m
o vin g t h e F a n s . . . . . . ....
....

5-18
R e m o vin g t h
e Fr o n t P a n e l ..... ...
...

5-19
How to R
e
m
o v e PCB oard
s f ro m Pl ast i c S upp
ort
C lip s
.... .... .
.....
. . . . .

5-20
Th e F ro n t P
a n e l S ub asse mbli
es ..... ... .

5-21
R e m oving t h
e F ro n t P an e l S ub
asse mbli es

. . . .

5-22
R e pl acin
g or R efitt in g t h e F ro
n t P a n e l S ub asse
mbli es

5-24
How
to Fi t PC B oards
in to Pl ast i c S upp
ort
C
lip s .

5-24
P o in
ts to O b ser v e wh
e n R efitt in g or R e pl
ac in g F ro n t
P
a n e l S ub assem bli es
. . ...... ...
.

5-24
R
e m o vin g t h e Inputs/O
u t pu ts Block

. . ....

5-26
R
e pl ac in g or R efitt
in g t h e Inpu ts/O
u t pu ts Bl ock a n
d
Cab l es ... .... . ....
...
...

5-26
R e m oving
t h e M e m or y Card
Co nn ector B oard . .

5-31
R e pl ac in g
or R efitt in g t h
e M e m or y Card Co nn
ector
B oard
. . . . . .
.... ....
....

5-31
R e m o vin g
t
h
e M e m ory Card
Bl oc k ... ....

5-32
R e m o vin g t h e M
ot h er b oard

.

. . . . . . . .
.

5-33
R e pl ac in g or R efitt in
g t h e M ot h er b
oard . . . . .

5-34
6 .

R e pl acea
bl e P arts
E xcha
n ge P arts Li st

. . .... . . ..
....

6-1
E xc ha
n ge B oard s . . . ....... ..
...

6-1
R e pl
ace m e n t B oards

... ......
. . . .

6-1
HP 8110
ΑP arts Li st

...... ....
... .

6-2
HP 81103
Α P arts Li st . . .... .... .. .
.

6-8
HP 81106
Α P arts Li st . . . .... ....
HP 81107 ΑP
arts Li st .... .... . .
. ...

6-10
7 .

Functional D escr
ip t i on
In trod u ct i on .... . . .... ... .
... .

7-1
Th e
Fun ct i o n a l Uni ts . . .... .....
...

7-2
P o w er S upply Uni t ... ..... ... .
...

7-4
Fun ct i o n al
Uni ts
on
t h e PC B
oard

. . . . ...

7-6
P r im ar y
Sect i o n

. .... ....... . .
. .

7-7
Fil
ter in g a nd Ov er vo l tage
P rotect i on

. . ... .

7-7
Fu se
a nd Swi tc h

. ...... .... .. .
.

7-7
B
r i dge R ect i fier and Bl
oc kin g Ca pac
i tor . ... .

7-7
PWM Co n tro l
Uni t, Swi tc hin g T ra
n s i stors, a n d
T ran sf or m
er ... . . .... ... ...

7-7
O
v
er l
oad P rotect i o n

..... ... ...
. .

7-8
'So
f t-start' at Power-up
.... ..... . . .

7-8
T e mp erat u re Co
n tro l . ...... ... ...

7-8
Seco n dar y
Sect i o n

.... ..... . . ... .

7-9
R ect i fier
a n d Fil ter f or D C S
uppli es .

.

.

.

.

.

.

7-9
-5 .2 V S
upply : Di rect P o
w
er Co
n trolled . ... .

7-9
±32
V, ±12 V, +5 .1
V
S
uppli es : Lin ear
P o w er
Con trolled . . . . ...... ... . . .

7-9
+32
VR eg ul ator Gate S
upply

... ... ...

7-9

O v er v o l tage
Protect i o n

. . ..........

7-10
Sh ort-C i rcui
t
Cu
rre n t P rotect i o n ........

7-10
F a n Co n
tro l a nd D etect i on . ..........

7-11
F a n Un der-C u rre n t D
etect i on

........

7-11
F a n O v er-Cu rre n t D
etect i o n . . . . . ....

7-11
Th e Mi cro p rocessor Board
. . . . . . . . ....

7-12
Th e MC68331 Mi cro p
rocessor

. . ... ....

7-13
Fun ct i ona l Uni ts on t h
e PC Boar d

... ....

7-14
Battery B ac kup and R
eset ... . ... . . . .

7-15
Boot
Co
n tro l

... . .... . .... ...

7-15
Osc ill ator ... . . . .... . ... . . ..

7-15
D evi ce Bu s In ter f ace

. . ..........
.

7-16
In terr up
ts ... . . ... ... . .... . .

7-16
Di s pl a y
.... . ....
... . ..... .

7-16
En a blin g . . . .... ... . . ....
.

7-16
Bu ffer in g ....... . . . . . . ...
.

7-16
RPG
..........
. . . ... .. .
.

7-17
Bee p er
......... . .
. ... ... .

7-17
HP- ΙΒ
In ter f ace

..... . . . ... ... .

7-17
Ke yb oard ........ . . . ... .. .
.

7-17
Me m ory
Card
Co
nn ector Board

. ... ....

7-17
Fl as h EPR O M
s

....... . ... ....

7-18
Stat
i c RAM s ......... . ... ....

7-18
Per
i od Board

. . ....... . .... ...

7-19
P o w er Fil ters

. ....... . ...

7-20
D e vi ce Bu s In ter f ace & Diagn
ost i cs ..... . .

7-20
De vi ce Bu s In ter f ace

. . ........ ..

7-20
EEPR O
M D ata

. . . . ........ . .

7-20
Di ag n ost i cs . . . . . . ........
. .

7-20
T r i gger Inpu t

. .

. . . . .. .

...... .

7-21
E xter n a l T
r i gger S i g n a l

. . . ........

7-21
Co mp arator .... . . . . ........

7-21
Th res h o l d Ge n
erat i on . ... ... . ....

7-21
TI G ER
I
C ...... . . . . ... . ....

7-21
TI
G
ER Cu rre n t So u rce .... ... . ....

7-22
Co n tro l .......... . . . . ....

7-22
T r i gger a n d Stro b e Ou
t pu ts

. . ... . ....

7-22
PLL Board

. . . ....... . . . . ....

7-23
P o w er Fil ters and D
e vi ce Bu s In ter f ace

. . . . .

7-24
PLL Core . . . ....... . ... . .
. .

7-24
Divi der . . . . ....... . ... . . . .

7-25
C l oc k Inpu t

. . ....... . . . . ....

7-25
Ex ter na l C l ock S
i g na l . . . . . ..... . .

7-25
Co mp arator
. .... . ........ . .

7-25
Th res h o l d Ge n e r at i o n . . ........ . .

7-25
Ex ter n al C l ock Di str ibu t i o n ......
. .

7-25
D es k e w B oard . . ... . . ......... .

7-26
P o w er Fil ters

. . . ... ......... .

7-27
D e vi ce Bu s In ter f ace

... .... . . ... .

7-27
D e l ay s ... .
..... .... . . ....

7-27
O u t pu t Board . . ..... .... . . ... .

7-28
Co n te n ts- 7

Po w er Fil ters

. ...
......
. .
. ...

7-29
Se lf
test a n d Ad j u st DA C

. .... ..... .

7-29
D e vi ce
Bu s In ter f ace

... . . . . ..... .

7-30
De l ay Ge n erator . .... . . . . .....
.

7-30
Co
n tro l . . . . . . . . . . . . ......

7-30
Wi dt h Ge n erator . . . ..... . ....

7-31
Var i a bl e Ampli t u de a nd S l ope
Ge n erator

....

7-31
S
l op e C u rre n ts . ... ...... ... ...

7-31
Ver ni er
c u rre n ts

... ...... ... . . .

7-31
O u
t pu t
Co
n tro l

... ...... ... . . .

7-32
Offset Gen erator .... ..... ... . . .

7-32
O u t pu t En ab l e a n d P
rotect i on ... ..... .

7-33
Me m or y S iz es

.... ... .... ..... .

7-34
EEPR O M a nd RAM S iz es
on t h e PC Boards

. .

7-34
R
estor in g De f a ul t Sett ings
... ... .....

7-34
U s in g t h e ΗΡ _ ΙΒ D e vi
ce
Co
mm and . . . . . .

7-34
O
v er w r i t in g Sett in gs

.... ....... .

7-34
Fi r mw are Up grade Cards

... . . ..... .

7-35
Me m or y Card S iz
es . . .... . . ..... .

7-35
Α .

Co mp onen t L e ve l Inf or m at i
on P ac k age
In de x

1-1 . P osition of
fuse-holder

.

.

.

.

.

.

.

.

.

.

.

.

1-2
1-2 . P ower Cables -
Plug I dentification

...... .

1-2
1-3 . R emoving the
Carrying H andles

.... . . . .

1-7
1-4 . Underside View o
f Front P anel S howing Case Fixing
Screws
.............. .
. . .

1-7
1-5 . R ear P anel S
howingCase Fixing Screws
. . . . .

1-8
1-6 . TopView of HP
8110 Α

.

.

.

.

.

.

.

.

.

.

.

.

1-9
1-7 . Underside
View o f HP 8110 Α

.

.

.

.

.

.

.

.

.

1-9
2-1 . Leading/ Trailing
E dge ranges

.

.

.

.

.

.

.

.

.

2-10
2-2 .
Highest and l owest l evel combinations .

.... .

2-12
3-1
.
50
Ohm, 0 .1%, 10 W Feedthrough
Termination . .

3-3
3-2 . The TRG M ODE
Screen Display in α Fully Fitted
HP 8110 Α

. . . . ... . . . ..... .

3-4
3-3 . The TRG M
ODE Screen Display in α Standard
HP 8110 Α

......... . ..... .

3-4
3-4 . The TRG M ODE Screen
WithManual T riggering in
α Fully-Fitted HP 8110
Α ... . ..... .

3-4
3-5 . The TRG M
ODE Screen WithManual T riggering in
α Standard
HP
8110 Α

. ... . ..... .

3-5
3-6 .
The Output Screen in α Standard HP
8110 Α . . .

3-5
3-7 . CONFIG Screen, P
arameters grouped by O UTPUT

3-6
4-1 .
T estpoints u sed in Period B oard Selftest
.... .

4-3
4-2 . T estpoints u sed in O utput B oard Selftest

... .

4-4
4-3 .
getting Started with Troubleshooting the HP
8110 Α

4-6
4-4 . The P ower
Supply Board

. ... . . . . . . .

4-7
4-5
.
T est Setup for the P ower Supply Board . . . . .

4-8
4-6
.
W aveforms at CR407 anode

... . . . . . . .

4-10
5-1 . Top View of HP 8110 Α

.

.

.

.

.

.

.

.

.

.

.

.

5-3
5-2 . Flowchart Showing The Steps N
eeded f or
R
eplacement or R etrofit

. . . . ..... .

5-6
5-3 .
R emoving the Carrying H andles

. . ..... .

5-8
5-4 . Underside View o f Front P anel S
howing Case Fixing
Screws ... . . . . . . . . . ..... .

5-8
5-5 . R ear P anel S howing Case Fixing Screws .... .

5-9
5-6 .
RFI
S
pring-Contacts fitted to the Sides of t he
Chassis ... . . . . . . . . . . . ... .

5-9
5-7 . Top View of HP 8110 Α

.

.

.

.

.

.

.

.

.

.

.

.

5-10
5-8 . Top
V iew o f HP 8110 Α with MPU board R emoved

5-13
5-9 .
Underside View o f HP 8110 Α s howing Output 1
board ... . . . . . . . . . . .....

5-15
5-10 .
Underside V iew o f HP 8110 Α s howingOutput 2
board . . . . . ............ .

5-16
Co n tents- 9

5-11 . Vi e w o f t h e R ear P
a n e l
S
h o win g t h e P os
i t i on o f t h e
F an s . . .
. . .... .... ..
....

5-18
5-12 .
F ro n t P an e l Fi x in g Scre w s . .... ... . . .

5-19
5-13 . F ro n t P an e l S u basse mbli es
. ..... . . . . .

5-20
5-14 . F ro n t P an e l S ub asse m
b li es . ...... ....

5-21
5-15 . Inpu ts/O u t pu ts Block S
h o win g t h e Fixing Scre
w
s

5-26
5-16 . Inputs/O u t pu ts Block S h o
win g t h e Ca bl es . . . .

5-27
5-17 . O u t pu t 1 b oard O nly Fi tted . . .... . . . .

5-28
5-18 . O u t pu t 1 a n d Ou t pu
t2
boards
fitted . . . . . .

5-29
5-19 . P os i t i on of P er i od b oard Ca
bl es

.

.

.

.

.

.

.

.

5-30
5-20 .
M e m or y Card Co nn ector
b oard C h ass i s Fi x in g
Scre w s ... . .... . . . . ......

5-31
5-21 . M e m or y
Card
Co
nn ector b oard Fi x ings
.....

5-31
5-22 . M e m or y
Car d Co nn ector b oard F ro n
t Fi x in gs

. .

5-32
5-23 .
M e m or y Card Co nn ecto r b oard S
i de Fi x in gs ...

5-32
5-24 . Two o f Th ree M ot h e rb oard Fi x
in g Scre w s on R ear o
f
S ub F ro n t P a n e l . . ... . . . . .....

5-33
5-25 . O n e o f Th ree M ot h erboard
Fi x in g Scre w s on R
ear o f
S
ub F ro n t P a n e l . . .... . . . . ....

5-34
5-26 . M
ot h er b oard Fi x in g Scre w s on F ro n
t o f
S
ub F ro n t
P an e l . . . . . . ....
. . . . ....

5-34
7-1 . Th e HP 8110 Α Fun ct i o n a l Uni
ts

. . . . ....

7-2
7-2 . Th e P o w er Supply
Fun ct i o na l Uni ts . . . ....

7-5
7-3 . Th e Mi cro p rocessor
B oard Fun ct i o na l Uni ts

...

7-13
7-4 . Th e P er i od B oard
Fun ct i on al Uni ts . ... ...

7-19
7-5 . Th e PLL B
oard Fun ct i o na l Uni ts . . . . ....

7-23
7-6 . Th e D es ke
w
B oard
Fun ct i o n a l Uni ts

... ...

7-26
7-7 . Th e O u t pu t B oard Fun ct i o na l
Uni ts

... ...

7-28

1-1 . Lin e Vo l tage a nd Fu se
Se l ect i on

.... . . . .

1-1
1-2 . R ac k M o un t in g
Accessor i es

...... . . . .

1-4
1-3 . ....
.... ..........
. . . .

1-5
1-4 . .....
..... .
. ........ ..

1-5
1-5 . .....
..... .
. ........ ..

1-5
1-6 . .....
. . ......
. . . ....
. .

1-6
2-1 . Typi
cal In fl u e n ce o f Sou rce
Imp eda n ce on Timin g
a n d L e v e l s

. . . ..... . ... ....

2-11
3-1 . R eco
mm e n ded T est Equipm
e n t Li st ... ....

3-2
3-2 . R eco mm
e n ded Accessor i es ... . ... ....

3-2
3-3 . P er i od Sett in gs
a n d TR R ef ere n ce

... ....

3-9
3-4 . Per i od Sett in gs
and TR R e f ere n ce

... ....

3-9
3-5 . PLL P er i od Sett in gs
a n d TRR ef ere
n ce

. ....

3-12
3-6 . Wi dt h
Sett ings a n d TR R e f ere n ce

.... .. .

3-15
3-7 .
Wi dt h Sett ings a n d TR
R e f ere n ce

... ....

3-16
3-8 .
D el ay Sett in gs and TR R
e f ere n ce ...... . .

3-18
3-9 .
D el ay Sett in gs and TR R
e f ere n ce . . . ... . .

3-19
3-10 . Do u b
l e D e l a y Sett in gs a n d TR
R ef ere n ce

... .

3-22
3-11 . Do
ubl
e
De l a y Sett in gs a n d TRR
ef ere n ce

... .

3-23
3-12 . Hig ha
nd L o w T est Sp ec i ficat i o n s .... ... .

3-35
3-13 . Hig h L e
ve
l
Sett in gs (50 o hm s - 50 o
hm s) a nd TR
R e f
ere n ce ....

3-37
3-14 . L o
w
Lev
e l Sett in gs (50 o hm s - 50 o
hm s) and TR
R ef ere n ce .... . . . . .

3-39
3-15 .
High L ev e l Sett in gs (1
Ko hm s - 50 o hm s) a nd TR
R
ef ere n ce . . ....

3-40
3-16 .
L o w L ev e l Sett in gs (1 Ko hm s - 50 o
hm s) and TR
R e f ere n ce . . ....... . ... ....

3-42
3-17 .
L ead in g E dge Sett in gs a n
d
TR
R ef ere n ce

....

3-45
3-18 .
T ra ilin g E dge Sett ings a n d TR
R e f ere n ce

....

3-47
4-1 . Fi e l d R e pa i r L e v e l o f HP 8110
Α Boards .

.

.

.

.

4-1
4-2 . Sett in gs for
DIP
S
wi tc h S1

...... ....

4-15
4-3 . Bi ts U
sed in SC PI R eg i sters ...... ....

4-51
6-1
. ... .......
. . ...... .... 6-1
6-2 . ...
....... . . ....... .
. .

6-1
6-3 . .. .
....... . .. ......
... 6-2
6-4
. ... ... . ..... .
. . . . . . . . . 6-8
6-5
. .... . . . ......
. . ... . . . . 6-9
6-6 . .. .
. . . . ...... ..
... ... .

6-10
7-1 . P o
w
er S
upply a nd Co mp o n
e n ts Cross- R ef ere n ces .

7-10
7-2 . Wa
v ef or m Ampli t u de a nd C u rre n t So u
rces . . . .

7-32
7-3 ..
...... ....... . .. .
. . . .

7-35
Contents- 1 1

Installing t h e HP 8110 Α
Initial I n s p ectio n
Warning

To avoid t h e h azard of
electric s h oc k , do n ot perfor m elect
r
ical
10

tests
w h
e
n th ere a r e sig n s of sh i p ping damage to any
p art of t he
i n str u ment's o u ter covers or panels .
P
ower
R e qu irements
In s p ect t h e s hippin g co
n ta iner f or da m age . If t h e co n ta in er or
c u s hi onin g m ater i a l i s
da m aged, kee p i t un t il t h e co n te n ts o ft h e
s hipm e n t ha v e bee n c h ec ked f
or co mpl ete n ess a nd t h e in str um e n t h as
b ee n v er i fied bot h m ec h a ni ca lly a nde
l
ectr
i cal ly .
If t h e co n te n ts are in co mpl
ete, or t h ere i s m ec h a ni ca l da m age, or
if
t h e in str um e n
t does not pass t h e P er f or m an ce T ests in Ch ap
ter
3,
not ify t h e nearest
He wl ett- P ackard office . Keep t h e sh ippin g
m ater i a l s f or in s p ect i on
by t h e carr i er . Th e HP off i ce will arra n ge
f
or
re pa i r or re pl ace m e n t wi t hou t awaiting
sett l e m e n t .
Caution

BEFO RE APPL Y
IN
G AC
LINE P O WER TO THE HP 8110A,
e n s u re t h at t he correct lin
e fu se i s in sta ll ed in t he fu se h o ld er and t h e
correct po w er ca bl e is fitted .
Th
e
HP 8110
Α
can op
erate fro m a ny s in g l e- ph ase AC po w er so u rce
s upplying 100 - 240 V in t h efre qu e n c y range f ro m 50 to 60 Hz , or
100 -
120 V at 400 Hz . Th e m ax imum p o w er co n s ump t i on i s 300 VA
wi t h all o p t i on s in stal l ed .
Table 1-1 . L ine
V
oltage and
F
use
Selectio n
Lin e Vo l tage

F u se _ Typ e

HP Part Num ber
100 - 240 V- I T 3 Α , 250
ντ

2110-0029

Ι
I n stalling t h e HP 8110 Α

1-1

HP 811 OA Se r vice Guide
R ep laci ng t he Fu se

1 . R e m ov e t h e po
w
er
cord .
2 . Un scre
w
t h e fu
se- h o l der at t h e rear o f
t
h
e in str um e n t bes id e t h e
po w er- inl et soc k et :
P ower Ca b le
1-2

I n stalli n g t h e HP 811 0 Α
4 . R
efit t h e fu se- ho l der .
Switzerland
8120-2104
α
So uth Africa

U nite d States
120 V
8120-4211

8120-1378
HP 811 GA R EAR P A N E L
Figure 1-2 . Powe r Cables - Pl ug
Identificatio n
/ Γ Ε '
Ι
ιι
Ν J
Australia

Denma rk

E u r ope

G reat Br
itain
8120-1369 8120-2956 8120-1689
8120-13151
Japan 120ν
8120-4753
_ ® ®FUSE
0 JC)
Τ
FU S E Η O L D Ε R
F igure 1-1 . Position of fuse-
h ol d er
3 . R
e pl ace t h e fu se wi t h t h e e quiv
ale
n
t part (See T a bl e 1-1) .
In accorda n ce
wi t h in ter n at i o n al sa f et y
sta n dards, t hi s in str um e
n t
is e quipp e dwi
t h α t h ree- wi re po
w
er cabl
e . Wh e n co nn ected
to
an
a pp ro p
r i ate A C p o w er rece p tac l e,
thi s ca bl e gro un ds t h e in
str um e n t
cabin
et . Th e t yp e of p o w er ca bl e s
hipped wi t h eac h in str
um e n t
depe n ds on t h e co un tr y o
f dest in at i o n . R e f er to Fig u re 1-2
f or t h e
part
numb ers o f t h e po
w
er cab
l es ava il a bl e .
Warning

To avoid t h e possibility of
in j ury o r deat h , t h e
precautionary W arnings
to

given on t he inside fro n
t-cove r of t he man u al m ust be
followed befo r e
t he i n strume n
t
is
switc hed on .

V e n tilatio n R equireme
n
ts
T h ermal P rotection
HP
811 OA Service G u ide
Th ef o ll o
win g w or k s h o ul d b e carr
i ed o u t by α qu al i fied e l ectr
i c i a n -
all
l ocal e l ectr i ca l codes b e in g
str i ct ly o b ser ved . If t h e
plu g on t h e
ca
bl e does n ot fit t h e p o
w
er
ou t l et, or t h e ca bl e i s to
be attac hed to α
ter min a l b l ock , c u
t t h e ca bl e at t h e plug e n
d a n d re- wi re i t .
Th
e co l or cod in g used in t h e ca bl e
will de p e nd on t h e ca bl
e
s uppli ed . If
α n e w plu g i s to be co nn
ected, i t mu st m eet l oca l sa
fet
y
re qui re m e n ts and in
c lu de t h e f ollo win g f eat u
res :
ι A de qu ate l oad-carr
yin g cap ac i t y (see tab
l e o f s p ec i ficat i o n s) .
ι Groun
d co nn ect i on .
ι Ca
bl e c l a mp .
Th e HP 8110 Α i s
fitted wi t h t w o coo lin g f a n
s . M a ke s u re t h at
t h ere i s ade qu ate c
l eara n ce o f 3 in c h es (75 mm)
at t h e rear a n d 1/2
in c h (12 mm) at t h
e to pa n d b otto m to en s u re
ade qu ate a i rflo w .
If t h e a i rflo w i s restr
i cted t h e in ter n al op erat in g
te mp erat u re will
b e hi gh er, red u c in g
t h e in str um e n t's re li ab
i lit y or cau s in g t h e
in str um e n t's
t
h
er m a l - p rotect i o n c i rcui ts to
au to m at i ca lly s wi tc h off
t h e in str um
e n t .
Over h eati n g
Detectio n
Th e HP 8110 Αm o ni tors
i ts in ter na l te mp erat u re in
t h e reg i on o f t h e
po w er s upply . If t h e te
mp erat u re e x ceeds a pp roxi m
ate ly 80°C, t h e
p o w er s upply i s s
wi tc h ed off . Th e in str um e n
t will s wi tc h on aga in if
t h e te mp erat u re
f a ll s b e l o w a pp ro xim ate
ly 77°C .
F an F ail ure
If e
i t h er o f t h e fan s i s p re
v
e n
ted f ro m o p erat in g by αb l oc k age, or
t h e p o
w er s upply to t h ef an s i s in terr
up ted, t h epo w er s upply i s
a u to m
at i call y s wi tc hed off wi t hin 3
to 4 seco n ds . N ote t h at a f ter
t h e
fa ul t co n d i t i on h as b ee n fi x
ed, t h e in str um e n t mu st re m
a in s wi tc hed
off f or at l east 2
minu tes to allow t h e detect i o n
c i rcui t to reco v er .
I n stalling t h e HP 811 0 Α

1-3