ROH 190 Series Installation guide

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II
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II
Operation
and
Maintenance

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WARRANTY
All
ROH
Corporation products
are
guaranteed
against
defects
in
material
and
workmanship. This warranty
applies
for
one
year
from
the
date
of
delivery
to
the
original
purchaser.
We
will
repair
or
replace,
at
out
option,
products which prove to
be
de-
fective
during
the
warranty period provided they
are
returned
to
the
factory.
Products
returned
for
warranty
repair
will
be
ser-
viced
and
shipped within 2 working days. Customers
may
repair
and
calibrate
equipment without voiding
the
guarantee,
provided the
service
is
performed in a workmanlike manner.
ROH
Corporation
will
supply
parts
free
of
charge
to
those customers
who
elect
to
repair
equipment
that
is
under warranty. This warranty
is
in
lie
u
of
all
other
warranties,
expressed
or
implied,
and
constitutes
fulfillment
of
all
our
liabilities
to
the
purchaser.
We
assume
no
liability
in
any
event,
for
consequential
or
incidental
damages
incurred
by
the purchaser in connection with products covered under
this
warranty.
ROH
CORPORATION
107
TECHNOLOGY
PARK
NORCROSS,
GA
30092
[phone]

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TABLE
OF
(
ONTENTS
SECTION
I
GENERAL
INFORMATION
AND
SPECIFICATIONS
Product Brochure
II
INSTALLATION
2.1 Inspection
2.2
Power
Requirements
2.3 Grounding Requirements
2.4
Installation
III
OPERATING
INSTRUCTIONS
3.1 General Operating Information
IV
TECHNICAL
DESCRIPTION
4.1 Block
Diagram
Description
V
MAINTENANCE
FIGURE
3
.1.1
3.1. 2
3.1.
3
4.1.1
5.1. 1
5. 2
.1
5. 3
.1
5.4.1
5.
5. 1
5.
6. 1
5.
7
.1
5.7.2
5.1 Meter Assembly
5.2
Power
Supply
Module
5.3
Audio
Driver/Receiver
Module
5.4 Crosspoint Switch
Module
5.5
Tally
Module
5.6 Chassis
5.7
Interconnect
Wiring
LIST
OF
ILLUSTRATIONS
DESCRIPTION
Front
and
Rear Panel Controls
and
Connectors
Remote
Control Connector
Model
190
Input Expander Wiring
Diagram
Model
190
Block
Diagram
Meter Assembly Schematic
Power
Supply
Module
Schematic
Audio
Driver/Receiver
Module
Schematic
Crosspoint Switch
Module
Schematic
Tally
Module
Schematic
Top
View
of Chassis
Model
190
Interconnect
Wiring
Diagram
Model
190
Power
Supply Wiring
Diagram

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•
•
~
Bridging Switcher/Line Monitor
Model 190
•• I l2 I3 I4 I5 I6 I7 I8 I9 f 10 f 11 f 12 1 13 1 14 1 15 1
The Model 190 is designed to fulfi II the functions of both an audio
bridging switcher and a multiple input line monitor .The unit may be used
to expand the
number of inputs for existing equipment and/ or determine
the signal level and
quality of critical audio circuits. The several versions
of the Model 190 provide single, dual channel, or stereo operation. The
single channel units incorporate a
monitor speaker and VU meter. The
dual channel and stereo units have a
VU meter for each channel and an
amplifier output for driving external monitor speakers. The input channel
selection
is obtained with momentary or alternate action illuminated
pushbutton switches. A
choice of eight or sixteen imputs are provided on
the standard models and may be remote
controlled using an external DC
control signal. The
number of inputs may be increased in increments of 16
to meet larger system requirements. Electrical specifications meet or
exceed
commercial broadcast requirements. Each unit is completely
self-contained and operates from
11 5/230 Vac, 50 or 60 Hz line power.
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Model 191
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Model 192 , 193
BAL SW
Inputs 5 through 8 or 16 not shown
Technical Description
The Model 190can select from any number of inputs and offers
both
monitor functions and a balanced line output. Input
selection
is achieved with illuminated pushbutton switches,
which provide a DC control voltage to actuate solid state
crosspoint switc
hes. Each balanced bridging input is isolated
and
actively mixed to pre, ·e nt crosstalk or signal loss as
additional inputs are selected.
The switch bus
mixing amplifiers drive the line and monitor
amplifiers through separate level controls. The line amplifier
provides 30 dB of gain and a balanced transformer output. The
monitor amplifier provides 40 dB of gain and the output is
connected through jacks which interrupt the speaker operation
when phones are used. Both the line and speaker
amplifier
outputs and an auxiliary input are available on the rear panel.
Metering
of eitherthe input or output Iine level is selected with a
front panel switch. The meter
circuitry incorporates an amplifier
to offer adjustable sensitivity and response ballistics. The input
sensitivity
is selected in 10 dB steps by interlocked front panel
switches. The calibration
is adjustable over a 10 dB range to
indicate 0 VU for 0,
+4, or +8 dBm line levels. The meter
response
ca n be switched to provide standard VU ballistics or a
fast, accurate peak responding indication.
Alternate action pushbutton switches are standard. Momentary
action, electrically interlocked switching,
is available with the
optional tally circuitry. The
tally is compatible with the input
expander accessory or the remote DC control option. The
remote control
of switching and tally circuitry is TTL logic
compatable . Pushbutton switch legend is engraved and
supplied
to the customer's specifications.
All circuitry is powered with a multiple output regulated power
supply which will operate from 115 or 230 Vac ±10%, 50 or 60
Hz . The power supply is fully protected from an output short
circuit or overload condition.
•
•

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•
•
Specifications
Gain:
Input Impedance:
30 dB line
amplifier
40 dB monitor amplifier
1 Ok ohms balanced bridging
40 dB CMR at 60
Hz
+20 dBm maximum common mode input
Switch Attenuation & Crosstalk:
?: 70 dB at 10 kHz
Line Output:
Line Output Level:
600 ohms balanced
+30 dBm, 50 Hz to 20 kHz
+24 dBm, 30 Hz to 20 kHz
Speaker/Headset Output:
4-600 ohms unbalanced
Power
Output:
10 watts into 4 ohms, 20 Hz to 20 kHz
Frequency Response: ± .5 dB maximum deviation from specified
bandwidth at rated output
Distortion, THD or IM:
-50 dB, 1/3% maximum at rated output
Noise:
Meter Range:
Meter Calibration:
Meter Accuracy:
Meter Response:
Meter Balistics:
85 dB
SIN ratio, -65 dBm residual at 20 dB gain
-20 to +20 dB in 10 dB
steps
0, +4 or +8 dBm for 0 VU indication
±
3% of reading and ± 2% of range
20
Hz to 20 kHz ±.5 dB
Standard
VU or Peak Responding
Ambient Temperature: 0° to +50° C operating range
Power Requirement: 115/230 Vac,
±10%, 50 to 60 Hz, 50 watts
5.25" H x 19" W x 15" D
Size:
Weight:
15 lbs.
Model Number and Name
Model 191 -08
Model
191 -16
Model 192-08
Model 192-16
Model 193-08
Options
01
02
03
04
05
8 Input
Audio Switcher, mono
16 Input Audio Switcher, mono
8 Input Audio Switcher, stereo
16 Input
Audio Switcher, stereo
8 Input
Audio Switcher, dual channel mono
Remote Control of Input Switching
Tally Interlocked Switching for 8 Input Models
Tally Interlocked Switching for 16 Input Models
16 Switch
Input Expander, mono
16 Switch Input Expander, stereo

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SECTION
II
INSTALLATION
2.1
INSPECTION
This instrument
was
carefully
inspected both mechanically
and
electrically
before shipment.
It
should
be
physically
free
of
mars
or
scratches
and
in
perfect
electrical
order
upon
receipt.
To
confirm
this,
the instrument should
be
inspected for physical
damage
in
transit,
and
checked to
verify
electrical
operation.
Al
material
in the
container
should
be
checked
against
the
enclosed packing
list.
The
manufacturer
will
not
be
responsible
for
shortages
against
the packing
sheet
unless
notified
immediately.
If
the instrument
fails
to operate
properly,
or
is
damaged
in
any
way,
a claim should
be
filed
with the
carrier.
A
full
report
of the
damage
should
be
filed
by
the claim agent,
and
this
report
should
be
forwarded
to
ROH
Corporation.
Upon
receipt
of
this
report,
you
will
be
advised of the
disposition
of the equipment
for
repair
or
replacement. Include the
model
number, type number,
and
serial
number
when
referring
to
this
instrument
for
any
reason.
2.2
POWER
REQUIREMENTS
2.3
2.4
The
Model
190
can
be
operated
from
an
AC
source
of
115
or
230
volts
(±
10
%
),
50
Hz
or
60
Hz.
Before the instrument
is
connected
to
a
power
source,
be
sure
that
the
slide
switch
(located
on
the
rear
panel) matches the voltage being
used.
The
power
requirement does not exceed
50
watts.
GROUNDING
REQUIREMENTS
To
protect
operating personnel, the National
Electrical
Manufacturers'
Association
(NEMA)
recommends
that
the instrument panel
and
cabinet
be
grounded.
This instrument
is
equipped with a
three-conductor
power
cable which,
when
plugged
into
an
appropriate
receptacle,
grounds the instrument.
The
offset
pin
on
the
power
cable
three-prong connector
is
the ground wire.
INSTALLATION
The
unit
is
designed
to
mount
in
an
EIA
standard
19
inch width rack. Mounting
screws with nylon washers have
been
provided
to
protect
the
front
panel
finish.
When
mounted
in a
rack,
additional
support
at
the
rear
of
the instrument should
be
provided
if
vibration
on
similar
stress
is
likely
to
be
encountered.
The
chassis
and
power
supply
common
are
grounded
at
the
line
cord
receptacle
which
is
suitable
to
remove
an
electrical
shock hazard; however,
when
an
additional
system ground
is
employed,
chassis
ground
terminals
should
be
used.
The
Model
190
has
low
power
consumption,
and
no
special
cooling
is
required.
However,
the
unit
should not
be
operated where the ambient temperature exceeds 50°c (122°F).

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3. 1
SECTION
III
OPERATING
INSTRUCTIONS
GENERAL
OPERATING
INFORMATION
The
190
series
instruments
are
intended
for
use as audio
QC
monitors or signal
routing
switchers.
Available options
for
the
unit
will
further
increase the
instruments'
application.
Figure
3.1.1
illustrates
the
front
and
rear
panel
controls,
connectors,
and
indicators
and
the
keyed
items
are
identified
and
described in the accompanying
list.
The
remote control
of
an
input
circuit
requires
that
the
appropriate
control
1ine
be
connected
to
ground.
If
the
unit
also
incorporates
the optional
tally
circuit,
a
momentary
contact
closure
or negative
transition
pulse can provide
the control function.
The
input
control
line
is
normally
at
a 5
Vdc
leve1
and
has
a 1
mA
current
sink requirement
when
connected
to
a ground
return.
The
1amp
output
for
each
input
switch
circuit
is
also
available
at
the connector
and
located immediately below the corresponding input
terminal.
The
output
voltage swing
is
between -15
and
Oto
+10
Vdc
depending
on
the
lamp
load.
Remote
switch
lamps
should
be
type
387
and
the
common
lamp
terminals should
be
connected to the
15
Vdc
binding
post.
Figure
3.1.2
identifies
the input
connector
contact
positions
used
for
the remote control
option.
The
optional expander accessory
may
be
used
to
increase
the
number
of inputs
in increments
of
16
to meet
larger
system requirements. Figure
3.1.3
shows
how
the
interconnect
wiring between the expander
and
the
main
unit
is
accomplished.
The
expander
contains
additional
crosspoint
switch modules
and
an
optional
tally
module. Operating
power
and
audio
amplification
are
provided
by
the
main
unit.
Operation
and
electrical
specifications
are
otherwise
unchanged
from
the
Model
190.
The
peak level the
input
switches can block
is
+30
dBm,
therefore
the
maximum
operating input level should
be
limited
to approximately
+20
dBm.
The
output
should
be
given the
same
consideration,
since
the
line
amplifier
will
clip
beyond
a
+30
dBm
output
level.

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1.
Meter:
Indicates
the level
of
an
input or output
signal.
2.
Meter:
Indicates
the level
of
an
input or output
signal.
This meter
is
provided
on
the
Model
192
stereo
unit
and
the
Model
193
dual channel
unit.
The
Model
191
mono
unit
provides
an
internal
speaker in
this
location.
3.
Zero
Adjust: Mechanical zero adjustment for t
he
meter.
4.
Channel
Select
Switches: Input channel
selection
provided
by
illumin-
ated pushbutton switches.
5.
Line Level:
The
output level adjustment
for
the l i
ne
amplifier.
6. Monitor Level:
The
output level adjustment
for
the monitor
amplifier.
7. Input/Output:
Selects
either
the
line
input or output
for
display
on
meter(s) .
8.
RMS/Peak:
Selects
either
the
VU
or
peak
response
for
the meter.
9.
Range:
Selects
operating range
for
the meter
from
-20
dB
to
+20
dB
in
10
dB
increments.
10.
Phone
: Jack permits signal monitoring using headphones . Speaker
operation
is
interrupted
when
phones
are
in use.
11.
Phone
: Jack permits signal monitoring using headphones , of channel
2
for
the
Model
193
dual channel
unit.
12.
AC
Breaker:
Circuit
breaker provides overload
protection
for
the
unit
.
13
. Voltage Switch:
Slide
switch
selects
115
V or
230
V
AC
power
.
14
.
Red
Binding Post: Provides
+15
Vdc
power
for
the expander
unit.
15
. Black Binding Post: Provides -15
Vdc
power
for
the expander
unit.
16.
Green
Binding Post: Provides a
power
supply ground
for
the expander
unit
.
17.
AC
Receptacle: Accepts grounded
AC
power
input to the
unit
.
18.
EXP:
Allows
an
additional
input
line
or
the
addition
of
an
input
expander
unit.
19.
TY:
Extends the
tally
clear
bus
to
an
expander
unit
.
20.
MON:
Monitor
amplifier
output
for
use with
external
speakers,Note:
21.
The
jumper
from
amplifier
output terminal
(H)
to
internal
speaker
ter-
minal (S) can
be
opened
to
mute
the
internal
speaker.
LINE
: Output connection
to
the
line
amplifier.
22.
INPUT:
Input connections
for
the signal inputs
to
the instrument.
23.
Ground
Terminals: Chassis ground
for
input
and
output cable
shields.

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FRONT
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REAR
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FIGURE
3.1.1
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14
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