Tektronix 5440 Instruction Manual page 75

3. Adj ust 10 ns timi ng
4. Adjust 5
n
s Timing
b.
Set the time-mar k generator for 10 na n osecon d
markers. Set the deflection factor of th e vertical am p lifier
so the mar kers are at least five divisions in am plitud e.
c . Set the time-base u n it for α swee p rate of 10
n
s/div .
Ad just the time-base triggeri ng co ntrol for α stable
display .
e . AD JU ST-C210 for one 10 na noseco n d ma rker pe r
divisio n over th e center eig ht major graticule
d
ivisio ns of
the
d isplay . Sweep accuracy is ±5% over the e ntire swee p,
excludi ng the first 30
n
s and the last 10
d ivisions of the
mag n ifie d swee p. See Fig . 5-5 for ad ju stme nt location .
Ad j ustment-5440
NO ΤΕ
NOTE
T
h
is step can
be p erfo
r
med only with α
time-base
Α 5842
time-base
or α
time-base h aving α 10 ns unit
h
aving
α 5 ns swee p rate, suc
h as
Te
k
tronix
swee p
must
be used.
5844 .
α. Connect the time-mar k generator signal to the i n put
α. Press the POWER switc h to turnoff the Oscillosco pe
of th e 5Α48 .
an d
i
nstall an approp riate time-base u nit in the
h
orizontal
compartmen t. Pull P OWER switc h ON .
b. Set the time-mar k ge nerator for 5 nanoseco nd
markers. Set the deflection factor of the ve rtical amplifier
so th e markers are at least five
d ivisio ns in am p litu de.
c. Set the time-base unit for α sweep rate of 5
n
s/ d iv .
Adj ust the time-base triggering co n trol for α stable
disp lay .
d . CHE CK- For one 10 na nosecond marker
p
er divi-
d . CHECK-For on e5 na n oseco n d marker per
d ivisio n
sio n over thecenter eight gratic u ledivisions ofthedisplay
over the ce nter eight graticule
d
ivisions of the dis play
( position as
n ecessary) .
(positio n as
n
ecessary) .
e. AD JU ST-C235 for one 5
n an osecon d ma rk er per
d
ivision over the ce n ter eight graticule divisions of the
d
is play . Swee p accu racy is ±6 ο/ο over the entire sweep,
exclud ing th e first 30 ns a nd
t
he last 10
d ivisio ns of the
mag nifie d swee p . See Fig . 5-5 for ad j ustment locatio n.
f. In teractio n will occu r betwee n ad j ustment of C210
and C235 .
R
epeat step 3 an d step 4 to ac hieve α timi ng
compromise .