___ ____ ___ r _
6 dJ'use the ias Control (63 or maimum out as seen
o g VU or VTV3, (I is des ible t0 be 3hin a lea0 st
/ db o he maximum eicieny point in orde to achieve
wide frequency ange ec0rding the lower o he two
vailble speeds. 3
. Bis tete Clibion
7, V'ih he machine still opering & descibed under Bias
A.dJu.stment, above,' turn the ete n.d Output wich o
he ERD-IA position Adju the slide on he Bias
leter Calibraion esistr (R59) fo a 2eo readin g on
the VU mete, (+4 DM on the VTVM3.
D Record Level Meter Clibrtion
8. 5ith he mchine operating s described ín he la5t sep,
tun the Meer and Output witch to the AYACK-LV
posiion, nd re-set he audio oscillat0r o 250 cycles, 5et
he D ecod Level Contol (O9) or a read ing o 2ero on
the VU (+ DBl on he VTVM), B^ U T3E PYBAK
LEV 00TOL 3 TIL 5T A DÆ5C0 3BD Y
mTI 5. , 3 5TE. .
9, Turn he Mete and Output Switch to the OD-EVE
position, and adjus the Record evel lee alibaio
resistor (R23 or a reading o 2ero n he VU (4 DBM
-''0, on he VTV).
E. Recod Hed Aignmen
lO, S. et he audio o5cil3ao at l5, 00O cycles, ( lO OO cyc1es or
3 3/'' 7 l/2'' machines) and be sure the ae peed nd
quali2aion swiches ae on HIGH Tun the ee nd
0utput 5witch o he 0RD-LEVEL position. e he
Recod Level o0ntrol (RO9) o a eading of -lO on the VU
(-6 D on he VTV). (or 3 3/'' 7 l/2'' mahines, set
or - l6 DBM on h VTVM,)
3 l Turn the Meter and 0utpu wiXch to the ABACK-LVEL
posiion ith the mchine in the"'Recod m0deF adjust the
left-hand elastic stop nu on top he Recod ead or maxi
mum output as seen on the VU o VTV3. Seveal eahs m y
noted, A1was choose the peaX o-f g'eatt 8mplit4de.. YOTE: :
Plybch evel Control ( R 43) maybe se for increased gain
3 5o 2/ 5/.5
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