HP 5383A

Table 5-1 . In-Cabinet P e r fo r ma n ce C hec k (Co n ti nu ed)
M
o
d
el 5383 Α
M ai n
te
n an
ce
ΝΟΤΕ
T h e sta b ility of t h e co u nte r d is p lay d epe nd s on t he stability of
t he test e q ui p me n t being u se d . T he HP 8654Β , fo r exam p le,
h as α s h o r t te r m sta b ility w h ic h sh o u l d ca u se at least t h e fi r st
five most-sig n ificant d isplay d
igits of t h
e
coun te
r
to b e sta b le .
4 . E XT ERN A L TIME B AS E INPUT
α .

O b tai n t h e followi n g test e qu i p me n t :
HP 651 Β Test Oscillato r
BNC
"TEE"
Co n nector
b .

At t he co un te r
f
r ont pan el :
Set
t h e I NPU T Switc h
to 50 Ω
Χ 1
Set t he GAT E TIME Switc h to
.1s/MHz
ι .

At t h e cou n te r r ea r p a n el, set t he ΙΝΤ/ ΕΧΤ switc h to ΕΧΤ .
d . Con n ect t he 50 Ω o u tput of t he HP 651 Β to t he 5383 Α co un te r via t h e "TEE" con-
nector as s h ow
n
in F ig ur e Α .
F igu r e Α
e .

Set t h
e
HP 651JB fo r an o u tp u t of 10 MHz at 250 m V r ms . T h e cou nte r 's d isplay s h o u l d
be 10 .00000 ±1 coun t .
5 . STA N DARD TIME BASE OSCI L LATO R
α .

Obtai n t he
following test e qu i p me n t :
HP 5328 Α (O p tio n 010) Un ive r sal Co un te r , or
HP 5345 Α E lect r on ic Co un te r
b .

At t he 5383 Α f r on t p a n el :
Set t
h
e I NPU
T switc h
to 50 Ω
Χ 1
Set t he GAT E
TIME
switc h to 1s/MHz
GATE TIME - .lS/MHZ
INPUT - 5012 Χ 1
f .

Set t h e HP 651 Β fo r an o u t pu t of 100 kH z at 250 m V
r
ms .
T h
e co un
te r
's
d
is p
lay
s
h o u l d
be 10 .00000 ±1 co u nt . NOTE B ecau se of t he in p ut time base, t
h
e gate
time (i .e .,
time to ma k e α f r e qu e n cy m eas ur ement) is 10 seco nd s .
(50 Ω OUT PU T)
F
R
HP 651
R
5383 Α
Ε
TEST
Ο FRE Q UEN CY
Α
OSCILLATOR
Ν
CO UN
T
ER
R
Τ
( ΙΝΤ / ΕΧΤ - ΕΧΤ )