Radio Systems DDA-1x8SH User manual

Radio Systems, Inc. DDA1X8SH Manual
12/07 Page 1
DDA 1x8SH
Digital Distribution
Amplifier Manual

Radio Systems, Inc. DDA1X8SH Manual
12/07 Page 3
Contents
Overview ....................................................................... 4
Mounting ....................................................................... 4
Operation ...................................................................... 4
Connections .................................................................. 4
Parts Layout Power Supply .......................................... 5
Parts Layout Amplifier.................................................. 6
Parts List Power Supply................................................ 7
Parts List Amplifier....................................................... 8
Specifications................................................................ 9
Warranty ..................................................................... 10
Repair Policy ............................................................... 10
Return Instructions..................................................... 10

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12/07 Page 4
Overview
TheRadioSystemsDDA-1x8SHisahigh-performancedigitaldistributionamplifier
withinput/outputconnectorsthatconformtotheStudioHub+RJ45wiringstandard.
Theamplifier allows twoindependent inputs tobe switched tothe eight outputsby
depressing an A/B switch on the front panel.
Total isolation is provided between A/B input s and the eight outputs. Each
balancedchannel is unaffected by the otherchannels. The Radio Systems DDA-
1x8SHDigitalDistribution Amplifierallowsdigital audiosources to berouted to
multiplelocationswhilemaintainingtheintegrityofsignalqualitythroughout.
Mounting
The DDA-1x8SH occupies only 1 rack unit (1-3/4 inch) of height in a 19 inch EIA
rack. Toallow for adequateventilation, avoidmounting theunit directlyabove
large heat producing equipment such as power amps or power supplies.
When stacking units, it is recommended that one rack space (1-3/4 inch) remain
openbetweeneverythreeunits.
Operation
Apply an AES3 signal, sampled from 32 KHz to 96 KHz to either (or both) of the
unit’s inputs. The applied signal is distributed to each of the unit’s eight outputs at
unitygain.
Two different signals may be wired to the inputs; the signal routed to the
distributedoutputsis determinedby thepositionof theA/B inputselect switch on
thefrontpanel.
LEDs on the front panel indicate which input (A or B) is selected, and whether audio
(data) is present.
Connections
TheDDA-1x8SHconformstotheStudioHub+wiringstandard. OntheRJ45,the
pinouts are as follows:
Pin1:AES +
Pin2: AES -
Ground is carried through the shield of the RJ45 cable. At the output connectors,
groundreference maybe selected byinstalling shorting jumpers (included) onto
the headers adjacent to the RJ45 jacks. Jumping the center pin with ‘CH” will
referencethe audio outputground to chassisground; jumpering thecenter pin with
“IN”willreferencetheaudiooutputgroundtotheinputaudioground.
AC line voltage is user selectable from the lid of the cabinet by inserting a thin
shafted screw driver through the vent holes to move the red line voltage selector
switch to the left for 230V operation, and to the right for 110V operation (factory
default).

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Parts Layout Power Supply

Radio Systems, Inc. DDA1X8SH Manual
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PartsLayoutAmplifier

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Parts List Power Supply
Part# Qty. Description ReferenceDesignation
16298 1 DA4X4BPOWERSUPPLYDETAIL
1026 1 CAP 15UF 35V C1
10597 1 CAP4700UF 35V C2
5744 1 CAP100UF25VRAD+/-20% C3
5743 1 CAP.1UFFILM C4
7012 4 DIODE1N4005 D1;D2;D5;D6
10489 1 FUSEHOLDER F1
10847 1 FUSE 0.3 AMP F1
10491 1 IECPOWERCONNECTOR J1
10490 1 SAMTEC8PINFRTHEADER J2
5877 1 RES 332 OHM 1/4W 1% R5
9585 1 RES 237 OHM 1/4W 1% R2
2761 1 RES 680 OHM 1/4W 5% R1
10492 1 SWITCHPOWERDPDT110/220V SW1
9351 1 TRANSFORMERPOWERDI-XX/AMD-1 T2
1077 1 VRLM317T U1
10683 1 LED3MMGREENHIGHCURRENT D9

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12/07 Page 8
Parts List Amplifier
Part# Qty. Description ReferenceDesignation
12850 1 SH+DDA-1X8DETAIL
14425 2 RES SMT 100 OHM 1/8W 1% R12;R13
16039 2 RES SMT 110 OHM 1/8W 1% R1;R2
16574 2 RES SMT 1.00M 1/8W OHM 1% R14;R15
14467 1 RES SMT 4.7K 1/8W 5% R11
16400 4 RES SMT 402 OHM R16;R17;R18;R19
15124 8 RES SMT 54.9 OHM R3;R4;R5;R6;R7;R8;R9;R10
16005 22 CAP SMT .1UF 50V CERM C1-C20;C25;C26
16025 2 TRANSISTORSMTZXMN6A07FTA Q1;Q2
16570 1 IC SMTCD74ACT153M U10
16572 1 ICSMTAM26C32CDRECEIVER U9
16043 8 IC SMT TRANSCEIVER RS485 U1;U2;U3;U4;U5;U6;U7;U8
16008 4 CAP SMT 47UF 25V ELECT C21;C22;C23;C24
16507 2 DIODESMTDL4004 D1;D2
16038 10 TRANSFORMERSMTAES/EBU T1;T2;T3;T4;T5;T6;T7;T8;T9;T10
11353 10 RJ45RIGHTANGLESHIELDED J1;J2;J3;J4;J5;J6;J7;J8;J9;J10
10484 1 HEADER8PINRIGHTANGLE J11
16417 10 HEADER3PINSAMTEC JU1;JU2;JU3;JU4;JU5;JU6;JU7;JU8;JU9;JU10
11359 10 JUMPERPLUG-TALL.1 JU1THRUJU10
16356 2 LEDSMTRED D3A;D4A
16357 2 LEDSMTGREEN D3B;D4B
16348 2 LIGHTPIPE3MMDUALTOWER D3;D4
9542 1 SWITCHSINGLESTATION"F" SW1

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Specifications
FrequencyResponse +/-0.1dBfs,20Hz–20kHz
Distortion .002%over20Hz–20kHz,output level -20dBfs(with
110ohm load)
Noise 123 dB below 0 dBfs output level, bandwidth 20 Hz -
20kHzwith110ohminputandoutputtermination
Nominalinput -20dBfs
Maximuminput 0dBfs
Maximumoutput 0dBfs
DynamicRange 123dB
InputImpedance 110ohms
OutputImpedance 110ohms
LEDIndicators audio(data)present
A/Binputselect

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Warranty
Radio Systems warrants this equipment to be free from defects in materials and
workmanship for a period of one (1) year.
This warranty extends to first users of the product and future owners who purchase
theproductwithinthewarrantyperiod.
The terms of this warranty are null and void if this product is stored or operated in
anenvironment not conducive toelectronic equipment, or shows signs of misuse or
modificationswhichaffect theproper functioning ofthe product. Thiswarranty
does not apply to damage caused by fire, smoke, flood, lightning, or acts of nature
andphysicalabuse.
RadioSystems,and itsassociated companies,authorizeddistributors, and
personnel are not liable for loss of revenues or other damages or effects to the
broadcast signal quality or coverage which may result from the improper
functioningofthisproduct.
RepairPolicy
Technical assistance is available at any time, at nor charge, by phone or
correspondence.
During the warranty period, there will be no charge for parts or service made to
units which show no sign of misuse by customer or lightning caused damage. The
customer is responsible for the cost of shipping their unit back to Radio Systems for
repair.
During the warranty period, shipment of small parts and assemblies may also be
made at a charge to the user. Emergency shipments of replacement parts and
circuits will be made at the user’s request for an extra shipping and service charge.
Chargeable services will be made COD or on Net-30 day terms to users with
establishedaccounts.
During the warranty period, full credit or return of COD charges (less any service
and expedited shipping charges) will be made to users who return the defective
parts or circuits within 30 days, if the damage is covered under the terms of the
warranty.
ReturnInstructions
ContactRadio Systems at856-467-8000 fora returnauthorization number.
Pack all items carefully and ship pre-paid, via UPS insured, to:
RadioSystems
601HeronDrive
LoganTownship,NJ08085
Attn: R.A.#_____________
Enclosea note which includes yourname, company, phone number, theserial
number, return address (no box numbers), and a complete description of the
problem.

For Assy:
Part# DDA-1x8SH
12/07
601 Heron Drive
Logan Township, NJ 08085
Phone: [phone] Fax: [phone]
http://www.radiosystems.com