SECTION 6
CALIBRATION
6-1. In tr o d u c tio n
In ele ctro n ic c o u n te rs , th e m o st im p o rta n t fa c to r affe ctin g m e as u re m e n t
acc ura cy is th e fre q u e n c y ac c u ra c y o f th e c ry sta l o s cilla to r th a t g en era tes th e
in te rn a l tim e base. T he fre q u e n c y a c cu ra cy m u st be c o n sta n t, o r, if th e re is a
slig ht v a ria tio n , it m u st be n eg lig ib le. T o m a in ta in th e m e as u re m e n t acc ura cy
o f an e le c tro n ic c o u n te r, p e rio d ic ally c a lib ra te th e c o u n te r to th e fre q u en cy
sta n d a rd a n d care sh o u ld be given to th e o p e ra tin g en v iro n m e n t.
6-2 . E q u ip m e n t R e q u ire d fo r C alib ra tio n
Equipment Specifications
Recommended
model
Signal generator
Frequency: 10 ~ 1500 MHz
O u tpu t voltage: 1 m Vrm s to 1 Vrm s
Pulse generator
Pulse w id th : 1 ms or less
O u tput: 100 m Vp-p to 5 Vp-p
Period: 10 ms or more
Digital voltm eter R esolution: 1 m V or more
R6341A/B
Frequency standard
S tab ility : 5 x 10'® or more
TR3110
Oscilloscope
Voltage: 10 m V /div. to 10 V/div.
Sweep rate: 0.1 s/div. to 1 ns/div.
N O T E : T R 5 8 2 1 /2 2 /2 3 /2 3 H sh o u ld be w arm e d u p fo r th e sp ecified tim e
b e fo re o p e ra tin g .
T R 5 8 2 1 /2 2 /2 3 : 15-25 m in u te s a fte r p o w e r on
T R 5 8 2 3 H : 2 4 h o u rs a fte r p o w e r on
6-1
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