BAVM-860SAW User Manual
INSTRUCTION MANUAL
651210100B
BAVM-860SAW
Audio/Video Modulator
Stock No. 5990
One Jake Brown Road, P.O. Box 1000
Old Bridge, NJ 08857-1000 USA
(800) 523-6049 • (732) 679-4000 • FAX: (732) 679-4353
The Standard of Quality in TV Signal Distribution
www.blondertongue.com
BAVM-860SAW Instruction Manual
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The lightning flash with arrowhead symbol
within an equilateral triangle is intended to
alert you to the presence of uninsulated
“dangerous voltage” within the product’s
enclosure that may be of sufficient
magnitude to constitute a risk of electrical
shock to persons.
The exclamation point within an equilateral
triangle is intended to alert you to the
presence of important operating and
maintenance (servicing) instructions in the
literature accompanying the product.
TO REDUCE THE RISK OF ELECTRICAL SHOCK, DO NOT REMOVE COVER
FROM THIS UNIT. NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
WARNING: TO PREVENT SHOCK HAZARD, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE
NOTE TO CATV INSTALLERS
This reminder is provided to call the CATV System Installer’s attention to Article 820-40 of the NEC that provides guidelines for proper grounding and,
in particular, specifies that the cable ground shall be connected to the grounding system of the building, as close to the point of cable entry as practical.
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BAVM-860SAW Instruction Manual
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Safety Instructions
You should always follow these instructions to help ensure against injury to yourself and
damage to your equipment.
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Read all safety and operating instructions before you operate the modulator.
Retain all safety and operating instructions for future reference.
Heed all warnings on the modulator and in the safety and operating instructions.
Follow all installation, operating, and use instructions.
Unplug the modulator from the AC power outlet before cleaning. Use only a damp cloth for cleaning the exterior of the
modulator.
Do not use accessories or attachments not recommended by Blonder Tongue, as they may cause hazards, and will void
the warranty.
Do not operate the modulator in high-humidity areas, or expose it to water or moisture.
Do not place the modulator on an unstable cart, stand, tripod, bracket, or table. The modulator may fall, causing serious
personal injury and damage to the modulator. Install the modulator only in a mounting rack designed for 19” rackmounted equipment.
Do not block or cover slots and openings in the modulator. These are provided for ventilation and protection from
overheating. Never place the modulator near or over a radiator or heat register. Do not place the modulator in an
enclosure such as a cabinet without proper ventilation. Do not mount equipment in the rack space directly above or
below the modulator.
Operate the modulator using only the type of power source indicated on the marking label. Unplug the modulator power
cord by gripping the plug, not the cord.
The modulator is equipped with a three-wire ground-type plug. This plug will fit only into a ground-type power outlet. If
you are unable to insert the plug into the outlet, contact an electrician to replace the outlet. Do not defeat the safety
purpose of the ground-type plug.
Route power supply cords so that they are not likely to be walked on or pinched by items placed upon or against them.
Pay particular attention to cords at plugs, convenience receptacles, and the point where they exit from the unit.
Be sure that the outdoor components of the antenna system are grounded in accordance with local, federal, and
National Electrical Code (NEC) requirements. Pay special attention to NEC Sections 810 and 820.
See the example shown in the following diagram:
Satellite Dish
Ground Clamp
Antenna Discharge Unit
(NEC Section 810-20)
Coaxial Cable
from Satellite Dish
Electric Service
Equipment
Ground Clamps
Grounding Conductors
(NEC Section 810-21)
3
Power Service
Grounding
Electrode System
(NEC Art. 250, Part H)
BAVM-860SAW Instruction Manual
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Safety Instructions - continued
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We strongly recommend using an outlet that contains surge suppression or ground fault protection. For added
protection during a lightning storm, or when the modulator is left unattended and unused for long periods of time, unplug
it from the wall outlet and disconnect the lines between the modulator and the antenna. This will prevent damage
caused by lightning or power line surges.
Do not locate the antenna near overhead power lines or other electric light or power circuits, or where it can fall into
such power lines or circuits. When installing the antenna, take extreme care to avoid touching such power lines or
circuits, as contact with them can be fatal.
Do not overload wall outlets or extension cords, as this can result in a risk of fire or electrical shock.
Never insert objects of any kind into the modulator through openings, as the objects may touch dangerous voltage
points or short out parts. This could cause fire or electrical shock.
Do not attempt to service the modulator yourself, as opening or removing covers may expose you to dangerous voltage
and will void the warranty. Refer all servicing to authorized service personnel.
Unplug the modulator from the wall outlet and refer servicing to authorized service personnel whenever the following
occurs:
❐ The power supply cord or plug is damaged;
❐ Liquid has been spilled, or objects have fallen into the modulator;
❐ The modulator has been exposed to rain or water;
❐ The modulator has been dropped or the chassis has been damaged;
❐ The modulator exhibits a distinct change in performance.
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When replacement parts are required, ensure that the service technician uses replacement parts specified by Blonder
Tongue. Unauthorized substitutions may damage the modulator or cause electrical shock or fire, and will void the
warranty.
Upon completion of any service or repair to the modulator, ask the service technician to perform safety checks to ensure
that the modulator is in proper operating condition.
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BAVM-860SAW Instruction Manual
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General
The BAVM-860SAW is an all solid state audio/video modulator that provides a modulated visual and aural RF carrier output
on any single CATV channel 2 to 135. The modulator can be used to put sound and color video on any of the above listed
channels in a CATV, MATV or SMATV system.
The modulator accepts standard (sync negative) polarity video at a 0.7-2.5 V P-P level from sources such as a TV camera,
video tape recorder, TV demodulator or satellite receiver.
The BAVM-860SAW features a +55 dBmV RF output level, and IF SAW filtering for adjacent channel operation. All
aeronautical channels are offset positive with a tolerance of ±5 kHz as required by FCC 21006. For ease of operation, all
level controls are located on the front panel.
A block diagram of the BAVM-860SAW is shown below. The audio/video modulator accepts a baseband video and audio
input and outputs an RF CATV channel. The RF level control provides up to +55 dBmV output. The video modulator control
sets the depth of modulation fo 87.5% over an input video level range from 0.7VP/P to 2.5VP/P.An audio modulation control
permits adjustment for ±25 kHz peak deviation of the aural carrier.
45.75 MHz
OSCILLATOR
VIDEO IN
SYNTHESIZED
PLL
OSCILLATOR
VIDEO MOD.
CONTROL
A/V
MODULATOR
A/V
MODULATOR
BAND PASS
FILTER
AMPLIFIER
MIXER
AUDIO IN
PRE-EMPHASIS
RF LEVEL
CONTROL
AURAL LEVEL
CONTROL
AUDIO MOD.
CONTROL
BAND PASS
FILTER
RF
OUTPUT
-30 dB TEST POINT
BAVM-860SAW Block Diagram
The BAVM-860SAW also provides a field-defeatable pre-emphasis network and an aural level control to ensure the proper
aural/visual ratio. An six foot cord and a convenience AC outlet on each amplifier permits easy connections between racked
units.
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BAVM-860SAW Instruction Manual
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Specifications
RF
Typical
Frequency Range: ................................ CATV channels 2 to 135
Output Level: ................................................................ 55 dBmV
Audio
Input Impedance: ................................... 10K Ohms, Unbalanced
Output Level Range: ................... 15 dB, continuously adjustable
Audio Frequency Response: ........................................... ±1.0 dB
(50 Hz to 15 KHz ref to std 75 msec pre-emphasis)
Input for 25 KHz Peak Deviation: ........................... 140 mV RMS
by front panel Output Level Control
4.5 MHz Intercarrier Stability: ....................................... ±5.0 kHz
Audio/Video Carrier Ratio Control: ..................... -7 dB to -20 dB,
Frequency Tolerance: .................... ±10 kHz - standard channels
±5 kHz FCC 21006 Offsets
General
Power Requirements: .................... 105-130 VAC, 60 Hz, 10.5 W
Audio Carrier Frequency Setting: ............................ ±1 kHz, Max
4.5 MHz above video carrier
Temperature Range: ....................................... 0 to 50 degrees C
RF to Video Response
from Fv -0.5 MHz to Fv +4.2 MHz:................ 1 dB P/V
Mechanical
Dimensions: .................................. 19 x 13/4 x 3, WxHxD, inches
Broadband Noise ........................................................... -90 dBC
Mounting: ..................................................19” single rack space
Spurious Output in 50 – 860 MHz Range
@ +55 dBmV Output: ................................................ -60 dBc
Line Cord: ................ 3 wire grounded, 3 wire convenience outlet
Finish:
Output Match (Return Loss): ...............................................12 dBc
.......................................................................... Plated
Shipping Weight: ................................................... 4 lbs. (approx)
Vestigial Sideband Reponse:
Connectors
Audio In: ....................................................................... “F” Type
@Channel Edge .................................................. -20 dB
@Adjacent Channel ............................................ -40 dB
Video In: ....................................................................... “F” Type
Video
Input for 87.5% Modulation: ............................. 0.7V to 2.5 V P-P
RF Out: ....................................................................... “F” Type
RF Output Test - 30 dB: ................................................. “F” Type
Video Input Return Loss: ................................................... 18 dB
Video Carrier-To-Noise Ratio in 4 MHz Bandwidth: ........... 60 dB
P-P Video to 60 Hz RMS Hum Ratio: ................................ 60 dB
Differential Gain at 87.5% Modulation:................................ ≤ 5%
Differential Phase at 87.5% Modulation: .............................. ≤ 5°
Group Delay ...............................................................170 ± 50 nS
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BAVM-860SAW Instruction Manual
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Installation and Operation
Note to CATV SYSTEM Installer
This reminder is provided to call the CATV System Installer's attention to Article 820-40 of the NEC that provides guidelines for
proper grounding and, in particular, specifies that the cable ground shall be connected to the grounding system of the building,
as close to the point of cable entry as practical.
Unpacking and Handling
Each modulator is shipped with all equipment assembled, wired, factory tested, and then packaged in an appropriate shipping
container.
Ensure that all accessories are removed from the container and packing material before they are discarded.
Mechanical Inspection
Inspect the front and rear of the equipment for shipping damage. Make sure the equipment is clean, and no wires, cables, or
connectors are broken, damaged or loose.
Damage in Shipment
Should any damage be discovered after unpacking the unit, immediately file a claim with the carrier. A full report of the
damage shall be made and a copy forwarded to Blonder Tongue Laboratories Inc. The company will then advise what
disposition is to be made of the equipment.
Precautions
Adherence to the initial installation precautions outlined in the Table below will help prevent problems arising during the
Returning Product for Repair (or Credit)
A Return Material Authorization (RMA) Number is required on all products returned to Blonder Tongue, regardless
if the product is being returned for repair or credit. Before returning product, please contact the Blonder Tongue Service
Department at 1-800-523-6049, Ext. 4256 or visit our website: www.blondertongue.com for further information.
Table 1 - Installation Precautions Table
PRECAUTIONS
REQUIREMENTS
Avoid Heat Buildup
Allow (1) EIA rack space (13/4") between powered headend
products in the equipment racks.
Ensure easy access to rack wiring.
Allow a minimum of 18 inches behind the equipment rack(s)
Facilitate servicing and maintenance.
Allow a minimum of 36” of clearance in front of the equipment
rack(s).
Avoid direct heating or air conditioning.
If unavoidable, use deflector plates.
AC power source outlets.
Locate equipment near sufficient outlets to provide power
for test equipment and power tools.
Rack Support.
Make certain rack supports are sufficiently rigid to support racks.
Building leakage.
Beware of dripping water onto equipment from leaky roofs,
waveguide roof entries, and cold water pipe condensations.
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BAVM-860SAW Instruction Manual
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Unit Mounting
The BAVM-860SAW is designed with an integral mounting bracket and is supplied with the necessary screws for installing
the unit in a standard 19” EIA rack.
Modular Connections
All the connectors on the BAVM-860SAW are located on the rear panel.
AUDIO VIDEO MODULATOR
MODEL: BAVM-860SAW
STOCK NO. 5990
BLONDER TONGUE
LABORATORIES, INC.
VIDEO
IN
120 VAC
60 Hz 10W
WARNING - FOR INDOOR USE ONLY. TO PROVENT FIRE OR SHOCK
HAZARD, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE
600 VA MAX
Line Cord
Outlet
Video Input
BAVM-860SAW Rear Panel
BAVM-860SAW Front Panel
Operating Controls
All operating controls are located on, or are accessible from the front panel.
1.
2.
3.
4.
5.
6.
VIDEO MODULATION - Adjusts depth of video modulation.
AURAL LEVEL - Controls amplitude of aural RF carrier to change aural/visual ratio.
AUDIO MODULATION - Adjusts for 25 kHz peak deviation.
OUTPUT LEVEL - Simultaneously adjusts amplitude of aural and visual carriers.
“POWER-ON” INDICATOR LIGHT
TEST POINT - -30dB Output test point
Stereo Operation
When using the BAVM-860SAW with a stereo encoder it may be
neccessary to disable the audio pre-emphasis circuit. Refer to
your stereo encoder’s instruction manual for required modulator
settings. Should the audio pre-emphasis need to be disabled,
move the jumper according to the diagram at the right. NOTE:
Blonder Tongue’s SE Series of stereo encoders do not require the
audio pre-emphasis to be disabled. When it comes to using the SE
Series with a BAVM-860SAW, keep the jumper as it comes from
the factory in the enable position.
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RF
OUT
AUDIO
IN
Audio Input
RF Output
BAVM-860SAW Instruction Manual
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Preparation for Use and Typical Application
After installing the unit, make the following adjustments:
Audio Modulation
With audio source connected, adjust Audio Modulation control for 25 kHz deviation. In lieu of an audio modulation meter,
use a TV set and adjust for equal volume as compared to a known off-air broadcast. Monitor for a few minutes to assure the
maximum volume does not over modulate, which can cause picture distortion.
Video Modulation
With a nominal 1 volt P-P video source connected, adjust the Video Modulation control for 85% depth of modulation. If a
spectrum analyzer is not available, a TV set can be used to check for proper picture contrast.
Antennas
A V
17
MCX-Uz U/V Converter
7
BPF-z Bandpass Filter
ZSCA Single
Channel
AGC Amplifier
2
4
6
7
8
9
9
11
8
BAVM-860SAW
Modulator
Attenuator
and Amp if
Required
Splitter/Combiner
DC T.P.
To Distribution System
Antennas
A V
8
Heterodyne
Processor
2
2
6
4
4
17
6
7
9
9
Combiner
To Distribution System
Typical Application
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11
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BAVM-860SAW
Modulator
Attenuation
if Required
Limited Warranty
Blonder Tongue Laboratories, Inc. (BT) will at its sole option, either repair or replace (with a new or factory reconditioned product,
as BT may determine) any product manufactured by BT which proves to be defective in materials or workmanship or fails to
meet the specifications which are in effect on the date of shipment or such other specifications as may have been expressly
agreed upon in writing (i) for a period of one (1) year from the date of original purchase (or such shorter period of time as may
be set forth in the license agreement specific to the particular software being licensed), with respect to iCentral™ (hardware and
software) and all other software products (including embedded software) licensed from BT, (ii)) for a period of one (1) year from
the date of original purchase, with respect to all MegaPort, IPTV products and fiber optics receivers, transmitters, couplers and
integrated receivers/distribution amplifiers (including TRAILBLAZER™, RETRO-LINX™ and TWIN STAR™ products) as well as for
VideoCipher® & DigiCipher® satellite receivers, and (iii) for a period of three (3) years from the date of original purchase, with
respect to all other BT products. Notwithstanding the foregoing, in some cases, the warranty on certain proprietary sub-assembly
modules manufactured by third party vendors and contained in BT products and on certain private-label products manufactured
by third parties for resale by BT are of shorter duration or otherwise more limited than the standard BT limited warranty. In such
cases, BT’s warranty with respect to such third party proprietary sub-assembly modules and private-label products will be limited
to the duration and other terms of such third party vendor’s warranty. In addition, certain products, that are not manufactured
but are resold by BT, carry the original OEM warranty for that product. The limited warranty set forth in this paragraph does not
apply to any product sold by BT, which at the time of sale constituted a Closeout Product.
BT will at its sole option, either repair or replace (with a new or factory reconditioned product, as BT may determine) any product
sold by BT which at the time of sale constituted a refurbished or closeout items (“Refurbished Product” and “Closeout Product”),
which proves to be defective in materials or workmanship or fails to meet the specifications which are in effect on the date of
shipment or such other specifications as may have been expressly agreed upon in writing, for a period of ninety (90) days from
the date of original purchase. Notwithstanding the foregoing, in some cases, the warranty on third party software and on certain
proprietary sub-assembly modules manufactured by third party vendors and contained in BT products and on certain privatelabel products manufactured by third parties for resale by BT are of shorter duration or otherwise more limited than the BT limited
warranty for Closeout Products. In such cases, BT’s warranty for Closeout Products constituting such third party software, third
party proprietary sub-assembly modules and private-label products will be limited to the duration and other terms of such third
party vendor’s warranty. In addition, notwithstanding the foregoing, (i) certain Closeout Products that are not manufactured (but
are resold) by BT, carry the original OEM warranty for such products, which may be longer or shorter than the BT limited warranty
for Refurbished or Closeout Products. All sales of Refurbished or Closeout Products are final.
To obtain service under this warranty, the defective product, together with a copy of the sales receipt or other satisfactory proof
of purchase and a brief description of the defect, must be shipped freight prepaid to: Blonder Tongue Laboratories, Inc., One Jake
Brown Road, Old Bridge, New Jersey 08857.
This warranty does not cover damage resulting from (i) use or installation other than in strict accordance with manufacturer’s
written instructions, (ii) disassembly or repair by someone other than the manufacturer or a manufacturer-authorized repair
center, (iii) misuse, misapplication or abuse, (iv) alteration, (v) lack of reasonable care or (vi) wind, ice, snow, rain, lightning, or
any other weather conditions or acts of God.
OTHER THAN THE WARRANTIES SET FORTH ABOVE, BT MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND, EXPRESS OR IMPLIED, AS TO THE CONDITION, DESCRIPTION, FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY OR AS TO ANY OTHER MATTER, AND SUCH WARRANTIES SUPERSEDE
ANY ORAL OR WRITTEN WARRANTIES OR REPRESENTATIONS MADE OR IMPLIED BY BT OR BY ANY OF BT’S
EMPLOYEES OR REPRESENTATIVES, OR IN ANY OF BT’S BROCHURES, MANUALS, CATALOGS, LITERATURE
OR OTHER MATERIALS. IN ALL CASES, BUYER’S SOLE AND EXCLUSIVE REMEDY AND BT’S SOLE OBLIGATION FOR ANY BREACH OF THE WARRANTIES CONTAINED HEREIN SHALL BE LIMITED TO THE REPAIR OR
REPLACEMENT OF THE DEFECTIVE PRODUCT F.O.B. SHIPPING POINT, AS BT IN ITS SOLE DISCRETION SHALL
DETERMINE. BT SHALL IN NO EVENT AND UNDER NO CIRCUMSTANCES BE LIABLE OR RESPONSIBLE FOR
ANY CONSEQUENTIAL, INDIRECT, INCIDENTAL, PUNITIVE, DIRECT OR SPECIAL DAMAGES BASED UPON
BREACH OF WARRANTY, BREACH OF CONTRACT, NEGLIGENCE, STRICT TORT LIABILITY OR OTHERWISE OR
ANY OTHER LEGAL THEORY ARISING DIRECTLY OR INDIRECTLY FROM THE SALE, USE, INSTALLATION OR
FAILURE OF ANY PRODUCT ACQUIRED BY BUYER FROM BT.
All claims for shortages, defects and non-conforming goods must be made by Buyer in writing within five (5) days of receipt of
merchandise, which writing shall state with particularity all material facts, concerning the claim then known to Buyer. Upon any
such complaint, Buyer shall hold the goods complained of intact and duly protected, for a period of up to sixty (60) days. Upon
the request of BT, Buyer shall ship such allegedly nonconforming or defective goods, freight prepaid to BT for examination by
BT’s inspection department and verification of the defect. BT, at its option, will either repair, replace or issue a credit for products
determined to be defective. BT’s liability and responsibility for defective products is specifically limited to the defective item or to
credit towards the original billing. All such replacements by BT shall be made free of charge f.o.b. the delivery point called for in
the original order. Products for which replacement has been made under the provisions of this clause shall become the property
of BT. Under no circumstances are products to be returned to BT without BT’s prior written authorization. BT reserves the right
to scrap any unauthorized returns on a no-credit basis. Any actions for breach of this contract must be commenced by Buyer
within thirteen (13) months after the cause of action has accrued. A copy of BT’s standard terms and conditions of sale, including
the limited warranty, is available from BT upon request. Copies of the limited warranties covering third party proprietary subassembly modules and private label products manufactured by third parties are also available from BT on request. VideoCipher®
& DigiCipher® are registered trademarks of Motorola Corp.
BAVM-860SAW Instruction Manual
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One Jake Brown Road, P.O. Box 1000
Old Bridge, NJ 08857-1000 USA
(800) 523-6049 • (732) 679-4000 • FAX: (732) 679-4353
The Standard of Quality in TV Signal Distribution
www.blondertongue.com
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