Orban RET-044 Installation And Operation Instruction Manual

orbon*
Installation
and
Operation
Instructions
RETROFIT
KIT
RET-044
For
OPTIMOD-AM
Models 9000A and
9000A/1
Purpose:
Adds
NRSC
Pre-emphasis
and 10kHz Low-pass
Filter
This
kit
modifies the Model
9000A
or
9000A/1
OPTIMOD-AM®
to
provide the
pre-
emphasis and 10kHz
low-pass
filtering
that
is
required by
the National
Radio Systems
Committee (NRSC). 11kHz and 5kHz
low-pass
filtering
are provided
for
stations that
re-
quire them.
The
filters
can be
preset, or
can be
switched by
OPTIMOD-AM's
day/night
logic.
This
kit
also provides a
means
of
de-emphasizing
the
NRSC
pre-emphasized
signal
for
monitoring.
Retrofit Kit
RET-044
contains;
1
1
2
1
1
1
1
1
1
1
1
1
2
1
1
1
2
1
1
Capacitor,
1300pF ±2%,
mica
Resistor,
5.49K ±1%,
Vs-watt,
metal
film
Resistors,
8.66K ±1%,
Va-watt
metal
film
Resistor, 3.1
6K ±1%,
Va-watt
metal
film
Resistor,
49.9K
±1%,
Va-watt
metal
film
Resistor,
1.27meg ±1%,
Va-watt
metal
film
(green-yellow-white-brown-brown)
(gray-blue-blue-brown-brown)
(orange-brown-blue-brown-brown)
(yellow-white-white-red-brown)
(brown-red-violet-yellow-brown)
Resistor,
10.0K±1%,
Va-watt
metal
film (brown-black-black-red-brown)
Opamp
(TL072)
1C
Capacitor,
0.1 |xF
±10%
metallized polyester
28-gauge jumper
wire
Resistor,
75.0K±1%,
Va-watt
metal
film (violet-green-black-red-brown)
Pre-wired 22-pin card
connector
with
mounting hardware
Card
guides
#1 F10 Card
Label, "Special Modification"
Resistor,
lOOn ±5%,
'A-watt,
carbon
film
Resistors, 620J2
±5%, V
4
-watt,
carbon
film
Capacitor, 0.18)xF
±5%,
100-volt, metallized polyester
Installation
and
Operation
Instructions
These
instructions
first
discuss
the
reasons behind
the
NRSC
requirements
(starting
on
the following page), then explain
how
to install
the
retrofit
(on
page
3).
Installation
consists
of replacing
components on Cards #3 and
#8, installing
a
new
card
edge
connector,
setting jumpers,
and
plugging
in
a
new
circuit
card.
A
simple
de-emphasis
circuit
can be
installed for
off-air
monitoring.
New
operation
information
and
technical notes
follow the
installation instructions.
Also
included are
field
alignment
and performance
verification instructions, a
circuit
de-
scription, a parts
list,
a schematic, and an
assembiy
drawing
for
Card #1F10.
P/N 95302-000-04
lOO-FB-6/92
Orban,
a division of
AKG
Acoustics,
Inc.
1525 Alvarado
Street,
San
Leandro,
California
94577
USA
Phone:
(510)
351-3500 FAX:
(510)
351-0500