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Technical appendix
Equalizations (lEe, NAB)
TAPE
SPEED
9,5cm/s
3.751ps
19 cm/s
7,5 ips
38cm/s
15 1ps
')r\
o o
For
correcting the
Irequ
('l1cy
response
,
In(
I~I"
nationally stal 'tjardl7ud equalization
netwo
rks
are
built Into
the
record
and reproduce
path
01
the
tape
recordc~s
.
he attack
points
01 the
correction are
re-
ferred
to
as
tranSition frequenc
ies
or
transilion
Ii
me
constants
8
nd
depend on
the
tape
speed.
Th
ey
have
been
star'
dardlzed
by variousorga-
nizations (lEe. NAB. AES, CClR)
as
follows'
I
TRANS ITION
FREQUI:.\JCY.
lOW AND
HIGH
(TRANSITION
TIMe CONSTANTS)
lEe
-
1968
NAB-1965
50Hz,
176811~
50Hz;
1768Hz
(3180I1s; 901-ls)
(31801-15
:
901-ls)
OHz,
2273
Hz
(00,
70~s)
OHz:
45 47Hz
(00,
351-1$)
50
Hz:
3183 Hz
(3180~s
:
50l-ls1
50Hz:
3183
Hz
(3180(1s: 501-1 s)
On
the
C270
ta
pe
recorder.
tli\:
equalization
networks are
plugged
into Ihe RFCORD
EQUALIZER SOARf) 1.777.540,00
and
tl\l:
REPRODUCE EQUALIZER 80ARD
1. 777.620
OQ,
Due
to thiS deSign It IS pOSSible
to
convert
Of
recalrbrate your
recorder
to
dif-
ferent
speeds
or Ihe
olher
'lqualrzi3tion
star
dard.
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