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3- 18 Testing t he HP 8110 Α
Note
When yo u are test ing instruments with 2 output channels it is
n
ecessary to :
α . Config u re
bot
h c
hannels .
b .
S wi tch OFF th e channel
t
hat is not being tested
If you t hen test t h e other channel :
ε.
S
wi tch ON th e ch anne l you are test ing, and s witch OFF the ot her
ch annel .
6 . Set t h e Di gitizing Osc ill oscop e HP 54121? :
ι Press αυτο sc αιε
ι Set timeb ase to ΤΙΜΕ /DIV = 10 ns/div
ι Ce nter t h e
p
ositive-going edges o f the tw o signals
ι Select t h e Di splay m e nu
a
nd set the scree n funct ion to single ;
set the number o f
a
verages to 32
ι Select t h e Del ta V menu
a
nd t urn t he voltage
m
arkers ON and
assign marker 1 to channel 3 and
m
arker 2 to c hann el 4
ι Set Preset
l
ev e l s to 50% - 50% and
p
ress (AUTO LEVEL SETT)
ι Select t h e Del ta t menu
a
nd tur n t he time
m
arkers ON
ι Set S TART ON EDG E = Ρ051 and STO P ON EDGE = POS 1
ι
P
ress t h e PRE CISE E DGE FI N D key
7 . Chec k t h e HP 8110Α delay at t he
f
oll owin g sett ings :
Note
Ι
R
ecord t he value of the fixed delay
a
nd sub tract it
f
rom
t
h e other
readings .
Table 3-8 . Delay Settings and TR Reference
Osci
ll
osco
p
e
T
i
m
e
b
ase
D
elay
Acce
p
tab
l
e Range
TR
E
ntry
10 ns/div
0.00 ns
fixe
d D
elay
4 - 1
10 ns/div
5.00 ns
3.75 ns to 6.25 ns
4 - 2
20 πs/div
9.99 ns
8.49 ns to 11 .49 ns
4 - 3
20 ns/
d
iv
50 .0 ns
46 .5 ns το 53.5
n
s
4 - 4
50 ns/
d
iv
99 .9 ns 93 .905 ns το 105.895 ns
4 - 5
50 ηs/d
i
v
100 ns
94 ns το 106 ns
4 - 6
200 η./
d
iv
500 ns
474 ns το 526 ns
4 - 7
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