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SAP and PRO Channel
Generators: The Model 8182A/SAP
Second Audio Program Generator
and Model 8185A/PRO Professional
Channel Generator are designed to
conveniently interface with the
8185A.
Circuit cards for the 8185A/PRO
plug into the 8185A's card rack;
8185A/PRO controls are then
available on the 8185A's set-up
control panel.
The SAP Generator is a separate
unit with its own audio processor.
The 8185A has a SAP input for
mixing the SAP subcarrier into the
baseband at the 8185A—this can be
especially useful if the exciter doesn't
have a spare subcarrier input. If the
8185A's SAP input is used, all meter-
ing required to easily achieve the
correct SAP injection level is
available in the Orban units.
Orban Experience and
Technical Support
Orban has been the leader in
broadcast audio since the mid-
seventies, having many thousands of
our OPTIMOD units in operation all
around the world. We like to think
that we hold this position because
we put exacting, thoughtful engineer-
ing into an easily serviceable package
and back it up with responsive
technical support for the life of the
product. That, and the fact that
Orban products sound good—
something specifications alone
cannot adequately convey.
Orban products are among the
most reliable in the industry. When a
problem does occur, we're standing
by to help. We try to incorporate our
experience with common problems
into the troubleshooting sections of
our manuals. If that information
doesn't help, call us. With each
OPTIMOD comes the experience and
expert assistance of our Customer
Service group. They've seen most
things that can go wrong with your
audio system, and can often solve
your problem in a short time over
the telephone.
Order Guide
Please refer to the OPTIMOD-TV
Ordering Guide in the Orban TV
System brochure for a listing of all
Television Stereo-related products.
Specifications
Performance
Performance meets or exceeds all specifications for the
BTSC system, as defined by FCC OET-60A and EIA
Multichannel Television Sound: DISC System Recom-
mended Practices. All measurements made with signal
applied directly to 8185A audio inputs; dbx N/R IN
unless otherwise noted.
Frequency response: ± 0.5dB, 30-14,000Hz;
<1 dB down at 15kHz.
Noise: <— 82dB, referenced to 100% modulation.
Total system distortion—BTSC mode
(N/R in):<0.1% THD, 50-10,000Hz;<0.2% THD,
10-15kHz.<0.2% SMPTE IMO; 0.08% typical.
Total system distortion-75us equivalent
mode:<0.05%THD, 50-15.000 Hz.<0.05% SMPTE
IMD; 0.03% typical.
System BTSC separation—tone ( 10% 75us
equivalent-input modulation, N/R in):>35dB, 50-
10,000Hz;>30dB, 10-14kHz;>40dB, 50-10,000Hz
typical.
System BTSC separation—pink-noise
(30% composite modulation, N/R in):>40dB,
50-10,000Hz;>35dB, 10-14kHz;>45dB, 50-10,0C10Hz
typical.
BTSC separation of monitor decoder
alone—tone (10% 75us equivalent-input modula-
tion, N/R in):>40dB, 50-10,000Hz; >35dB, 10-14kHz.
System group delay-75us equivalent
mode: Constant ± 5%, 50-12,000Hz.
Installation
LOCATION
Immediately below 8182A OPTIMOD-TV Audio
Processor, if used.
EXTERNAL AUDIO INPUT
For audio processors other than Orban 8182A
OPTIMOD-TV.
Configuration: Left and right, flat or pre-
emphasized.
Impedance: >10K ohm load impedance, elec-
tronically balanced by means of true instrumentation
amplifier. Requires balanced source1600ohms.
Common mode rejection>60dB at 60Hz.
Sensitivity: + 10dBm at 100Hz applied in - phase to
both inputs produces ± 25kHz main channel deviation
(100% modulation).
Connector: Barrier strip (#5 screw), EMI
suppressed,
INTERCONNECT TO 8182A
OPTIMOD—TV Audio Processor
Signals: Left and right 8182A compressor output to
8185A six-pole filter input; 8I85A left and right six-
pole filter output to 8182A HE limiter input; 8182A
left and right pre-emphasized output to 8185A input.
Connector: 14 pin connector to mate with
shielded jumper cable supplied with 8185A.
SYNC REFERENCE INPUT
Impedance: 20K ohms, balanced. Switchable 75
ohm termination.
Level: Composite video or sync, 0.6 to I.6Vp-p;
IV nominal.
Connector: Two BNC connectors, looped-thru,
shell insulated from chassis.
SAP SUBCARRIER INPUT
Impedance:
10Kohms, unbalanced.
Sensitivity: 1.5Vp ( 3.0Vp-p) produces ± 15kHz
carrier deviation ( 100% modulation).
Connector: BNC; shell floating over chassis
ground, capacitively coupled to chassis through ap-
proximately 500pF for EMI suppression.
COMPOSITE OUTPUT
Impedance: Voltage source (Oohms) or 75ohm
source impedance (selectable with internal jumpers),
single-ended, impedance independent of OUTPUT
LEVEL setting.
Level: Adjustable from 0 to 2.2Vp (4.4Vp-p) at
73kHz total deviation. 18-turn TOTAL BASEBAND
OUTPUT LEVEL control.
Load: When jumpered for voltage source, will drive
two 75ohm loads in parallel. Maximum permissible
load capacitance 0.047uF.
Connector: BNC, floating over chassis ground. EMI
suppressed.
MONITOR OUTPUT
Configuration: Left and right, N/R decoded ( or
75us deemphasized, depending on setting of internal
MONITOR N/R IN/OUT switch.
Impedance: 600 ohm source impedance, single
ended.
Level: Fixed; 5V peak into open circuit corresponds
to 100% modulation.
Connector: Barrier strip (05 screw), EMI
suppressed.
REMOTE CONTROL
Function: Selects MONO LEFT/MONO RIGHT/STEREO,
Pro Channel ON/OFF.
Voltage: 6 to 24V AC or DC, momentary or
continuous, optically isolated. 22VDC supplied to
facilitate use with contact closure.
Connector: Barrier strip (05 screw).
SYNC LOCK INDICATOR
Configuration: Relay-controlled contact closure to
indicate successful lock to sync or composite video.
Limit applied voltage to 50V, total load to IOVA
non- reactive, current to 0.5A.
Connector: Barrier strip (05 screw).
POWER
115/230VAC (switch selectable, ± 15%, 50-60Hz;
35VA. WC mains connector with detachable 3- wire
"U-Ground" power cord supplied. Leakage to chassis
<0.5mA. AC is EMI suppressed.
Ground: Circuit ground is independent of chassis
ground; both appear on terminal strip on real panel
for strapping as required.
DIMENSIONS
19" (48.3cm) W, 7" ( 17.8cm) H, 12.5" (31.2cm) D.
4 rack units.
WEIGHT
24 lbs ( 10.4kg) net; 34 lbs ( 15.4kg) shipping.
ENVIRONMENTAL
Operating temperature range 0-50°C (32-122°F).
Humidity 0-95% RH, non-condensing.
Circuitry
FILTERS
Filtering exceeds BTSC specifications, as stated in
12.4.1.1 and 12.4.1.2 of the EIA Multichannel Televi-
sion Sound: BIM System Recommended Practices.
LEFT AND RIGHT LOW-PASS FILTERS
Type: Six-pole filters with two high-Q notches.
Rejection: >— 50dB @ I5,734Hz.
SUM AND DIFFERENCE
LOWPASS FILTERS
Type: Eleven-pole elliptical filter.
Passband response: Typically + 0.05, — 0.ldB
to 15,000Hz.
Stopband rejection:>60dB @ 15,734Hz and
above.
STEREO BASEBAND ENCODER
Equivalent stereo separation:>55dB,
50-15,000Hz.
Crosstalk—linear:<— 70dB, 50-15,000Hz, main
channel to subchannel, or subchannel to main chan-
nel, referenced to ± 55kHz deviation.
Crosstalk—non-linear: <— 80dB, main channel
to subchannel, or subchannel to main channel,
referenced to ± 55kHz deviation.
Suppression of other spurious com-
ponents: <— 75dB, referenced to ± 55kHz
deviation.
Warranty
One year, parts and labor. Subject to limitations stated in
our Standard Warranty.
All specifications subject to change without notice.
«bon
Orban Associates Inc.
645
Bryant Street
San Francisco, CA 94107 USA
(415) 957-1067 or (800) 227-4498
Telex 17-1480
FAX (415) 957-1070
800048-000-02
11/87
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