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lso be used to
d pt the Model 8100A).
This kit cont ins:
QTY
DESCRIPTION
NTRODUCT ON:
NSTALLAT ON:
If you h ve not h d much experience desoldering on double-sided printed circuit c rds,
ple se re d the section entitled "Repl cement of Components on Printed Circuit
C rds" in Appendix F of the 8100A/1 Oper ting M nu l.
With this Accessory, the processing c n be e sily
djusted to
chieve
loudness level
within 0.3dB of th t
ccomplished by composite clipping ( n in udible difference),
while protecting the SCA region
bout 40-50dB better th t
composite clipper c n.
2
ACCESSORY K T 22
INSTRUCTION SHEET
FM Filter C rd #0
Prewired Connector & H rdw re
Modific tion L bel
C rd Guide
Registr tion C rd
Inst ll tion consists of
slight modific tion of the C rds #8
nd #9
nd inst ll tion of
prewired connector for C rd #0.
Even with less th n extremely
ggressive processing, the SCA region is much more
rigorously gu rded from interference from the stereo subc rrier.
The FM Filter C rd (C rd #0) repl ces the s fety clippers in the OPTIMOD-FM Audio
Processor with
p ir of overshoot-compens ted, low-p ss filters in order to
signific ntly reduce (by 25-30dB) "spl tter" in the SCA region of the b seb nd,
s
comp red with the "stock" 8100A or 8100A/1.
It
lso reduces
ny residu l overshoot
by
bout 6%.
C rd #0 is inst lled in the sign l p th between the output of the existing C rds #8
nd
#9 (filters)
nd the input of C rd #7 (stereo gener tor).
The frequency response of
the C rd is typic lly +0, -O.ldB, 30-15, 000Hz.
An 8100A/1 cont ining this c rd will
therefore perform well within its +0.75dB specific tion limit.
Ad pts OPTIMOD-FM^ Model 8100A/1 Audio Processor to
ccept FM Filter C rd #0.
(This kit
nd instruction sheet c n
OPTIMOD-FM Model 8100A/1 w s designed to meet
ll rules in the now-deleted FCC
73.322 reg rding crosst lk between the m in ch nnel
nd subch nnel.
Higher
perform nce th n is required by the FCC is sometimes desir ble to fully protect SCA
subc rriers from interference c used by the oper tion of the 8100A/l ' s s fety clippers
(on C rds #8
nd #9) on extremely densely-processed progr m m teri l, or simply to
llow
higher level of pe k modul tion without
n incre sed risk of overmodul tion.
Orban Associates nc.
645 Bry nt Street
S n Fr ncisco, CA 94107
95296-000-02 7/86
M in: (415) 957-1063
S les: (415) 957-1067 Telex: 17-1480
C rd #0 h s been specific lly designed to be used in conjunction with the 8100A/l ' s
existing FCS Overshoot Corrector.
C rd #0 is therefore unus ble with the older
OPTIMOD-FM Model 8000A, or with other m nuf cturers ' equipment.
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