HP 5065A Manual page 21

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c, Conn6c\ 8
roiennce
5 fA Hz to !NPUT f\ and tho
5065/', 5 MHz ou1put to !!'\JPUT G.
d. Set ''Zero~ Ope~·-- Pull" front pan(;~ mounted toqg!e
sv.titch to ''Zero''. AdJUst ;'Zero Scale'· control for a zoto
scale
i
race on recorder.
e. Set switct' to ;'Ful!" end adjust ''Full Scare"
contro~
tor a fu!f scale !race on recorder,
Check both "Zero" and "Full Scale" outputs und
readiust if necessary.
fl.
The recorder
wH!
now provide a co'ntlnuous rec-
ord of frequency comparison and will be auh:>rnaticaHy
reset when the recordr:r pen ror:u:::hes zero or full-sca!e
position.
IL With the recorder sel lor 1 volt full scaiH and
1 lnJ hr., the phase difference recorder will tm 0.2
,sec
fl<ll
tca!e
with 5 MHz
jnputs~
See Figum 3-4
tot
an
exam~
pie of a frequf'Jncy'
dtferen·~:iu
measurement under these
conditions.
3-19. OPERATION WITH TUII!E STANDARD
OPTION 001
(or
003)
3#20 Option 001
prov~des
f,Aode! 5065A with a
orH)
pu~se-peH:>econd
clock output The divider drive is an
ifiH}rna!ly connected 1 iviHz signa! from AC frezr.;ency
Divider Assembly. TlME DELAY comrols ere
kiCHted on
th-e
1>5
,Assembly and can be seen with
tile
top covHr
rernovnrL The TIME DELAY six
thumbV>lhBel
!:Ywilch con-"
tro\s the phaS(J of tho do-c:k-pu!l:K; outout from 1 micro~
second to i SH:;cond with n:;:spect !o an extCOlBl u;,h;n::mG(~.
The O,v1 microsecond TIME DELAY screwdrivor tJdjustA
n;ont allows line adjustrnent D\~"er anv 1 rnicrosncond
portl\)n ot the
thurnbwh<:e~
settings.
:1-~-21.
The time standard option includes a 24 hcHJr. LED
(jigita! clock asserftbl'f A19; which
indicHtes Ume tn
hours,
mlnutot~s
and
s<~Conds.
Tile SYNC buhon on Divid8r
/\ss0·mbly ,45 onablor, the ;nstrurnf3nt to synchrnnize to an
nxtr;:nlH.!
rt~fet8nc.e
strtn(WrcL HH" di1-JitB! ciock
i:~ :~et
by
nrn::::sinq li'm SET pushbutton. SLOW/FAST
S\N!V:::h
,;nd
HOLD pushbutton 'ocatnd oi'l !'et-l:r ot clock-
3,22.
SETTING
HiE CLOCK
PHASE TO AN
EXTERNAL
ClOCK
output and £sn external rofenmce clock. may be set to any
(iesired point between coincidenc;;: and 1 sBcond by
H'\B h.>l!owing proce(Jure. The techruque used
wW
d ';rx:nd on HiD t>Aodei 5065A app!icohon <:H!d individual
;c· (Bqwtnrnents.
:'.h24, Automatic Synchrord.zaUon
:_J ..
;:c;
To i;\\Jkimaikaiiy· ::;ynchrcnize the
1 ..
p:::.·~'
c:-utput
p-ui:cc oncl th0 ir:tenn!, k;Gh.
c~nve
v-nth an extentd! '-PPS
rcf~''~'''.onu:•. proceed c~"-~ follow~.;~
h.Aodt:d b06SA
Circuit Diagrarns, r'heory, and MHin~cnance
a.
HH:·~ov~~
ihc b:):-.'l V::vf: tor
;;tv.:.:e:o:~:;
L;
TiVlE DEL!\Y
contrc\s.
b. R<)tf.dt:':
the~>~
su_; THAE DEU\\'
cunt:ro~
rnaxi··
mt.Fn
c.w
for
rnjn:rnum delay :do not
ovsrlig!TlNl
c. Set the Tlf·AE OCLAV thumbwheei
!>Wi~ctles for
the dnsirm:i Urne- de
ray of
thH clock pJfse:, Thethurnbv.;tH'H:d
sw~tches rr~ad dirBd~I Ho<J>d~VcH·.
H:en: :sa 9-11 p$0(; built-
in delay in t!1e dlgit.a! divider clrcuit wrw:::t:
~~~wu!d
bB
added to the time-delay ca!<;u!ation
d. Connoct the reference pu1se to the maf SYNC
INPUT jack fmust be greaH;r than 1-6V with less than
50 nanoseconds r!se·-timo and a width greater than
0.5
,~.~sec.
e. Press SYNC pushbutton on A.5 Assembly and
hold down at least
1-~second.
Tt10 next t!ck
ot
the dock
output
wH!
be delayed according· tn
ttw
seW
no
of the
thumbwhee!
~<witche-s
;plus Uw 9 to 1
i
p.seo bui;t-in delay;,
For mom precise adjustment of tirne delay, the 0-i _pse-c
TIME DELAY provides conHnuous·-delay adjustmHnt horn
0-l tJSBC.
f. \/v'hen the clock pulse i:::, synChfOniz_nd, tno digitai
CloCk WHi Hdvance in synehronisrn YVith the lf!Strumrmi
1PPS.
g. For a delay
ot
!ess ihan 10 utoc, tho
thurrd:)Wh~e!
svvitche.s are tirst set 0.1 899.989_ Then the thumbwhf:ul
setting is -dccrBus.ed as required and final adjustmfird is
made wfl!1
thr~
0 to 1 ,usee T!tvHZ DELAY controL Use an
arran~p:ment
li1<:0 that of fiqun:
3~8
to S<.:curate!y rneasuto
time
inH:~rva!B
behvoen the two 1 -PPS puises For short
delay inten;als. use an o:s-;ctl!oscnpo, Fc>r l<Jn-qt.w delay
intervals. use
H1B
optional countfJr' an\C-HilJBmenl.
3-27 !f the refomnce pulse
do<:;~'>
not meet me mquke-
mnnis for sync opomt:on '-5V. -<·Sn na.nnsee<:::>r!d ri.s.e
tirne, ;:md whJl.h >{}5 ,u.soc :, use i'he
h~chnique
ot' Hqure ,J-B
!,!.;
rYHJ&:":>ure~ lltT!(}
intervats Set t:r-ne ck:lay of the 50651\
1~PPS oulpvt ;:n (l!:quned ,,vith ~hr: TU-JE DELAY thurnb"
\vhccd ~;witc.lv __ :,:;;·. ono o .. 1 ,;:se<:- !'<:w:tr·o< Fot delay
intervals, usP <.\n osci!l<-ncnpe For laro\-;r
w.:.e the optl<>n-;·Jl
counter
Ar·mrrk
b. S{,;t t1ours, rninutes. and seconds by piacinq th6
SLOV>l/FAST t.oogie sw·itch at FAST and rnoml':'ntadfy
depros:;;; the SET pushtn.!tton for i'8.pid <Hi vance of the-
rJ!s~
play_ Pi;·we togf.}!e sw1tch to SLO\.t·J ond
pre~"s
3ET puBh··
btmon tor slow advance of the ,i,sp!a;,.',
c Set
'~~(H_::onch
CHI
nw di
.:p\Hy
Sit~Jhlhi
::th'JJ_d ot the
~"eh_,,-ence cloCk~,
.:1.nd UJ!O;n Pfi-JSF 1hu H(}l G pusf·:·t>uffc•rL
Re·i(:asn HCLD pushh.mor-::
'·Ni'len <efDfSi'iC£''
c1ock Hmo
!~\
'ciE'Iil: >Oi
to
H\s-·
dt~fU~~ cio(;~
d