Telex BTR-200 Series manual Receive Board

Page 21

ALIGNMENT PROCEDURE

Receive Board - 70714000

Equipment Required:

D Signal Generator

D Sensitive RF Voltmeter

D DC Voltmeter

D AF Voltmeter

1.Connect the signal generator to the Receive Antenna jack. Set the deviation at ± 3 KHz at 1 KHz. Refer to the frequency chart below. Look at the marking on the Y301 and set the generator to the corresponding ALIGN fre- quency.

11.Place the RF voltmeter probe tip inside the top ofL304.

12.Adjust VC304 for a peak indication.

13.Adjust VC305 for a null indication.

14.Adjust VC306 for a peak indication.

15.Place the RF voltmeter probe tip on the collec- tor ofQ303 and adjust T301, T302, and T303 for a peak indication.

Y30l

Align

CHl

CH2

CH3

CH4

Marking

 

 

 

 

 

 

 

 

 

 

 

171R905

170.705

171.905

171.045

170.245

169.505

 

 

 

 

 

 

207R800

206.900

207.800

207.425

206.800

206.000

 

 

 

 

 

 

213R800

212.900

213.800

213.425

212.800

212.000

 

 

 

 

 

 

2.Adjust VR309 for 0.44 VDC across R312.

3.Place the RF voltemter probe tip inside the top of L307 and adjust VC307 for a peck indica- tion.

4.Set the RF voltmeter to its most sensitive scale without stray pickup.

5.Place the RF voltmeter probe tip inside the top of L301.

6.Increase the signal generator output level until the RF voltmeter indication just begins to rise.

7.When adjusting, reduce the signal generator output rather then reducing the RF voltmeter sensitivity.

8.Adjust VC301 for a peak indication.

9.Adjust VC302 for a null indication.

10.Adjust VC303 for a peak indication.

3-10

16.In the following alignment, unless othelwise directed, adjust the signal generator output level to maintain a DC voltage of between 1 and

1.5volts.

17.Set the signal generator to the channel 1 fre- quency.

18.Adjust T304, T305, and T308 for maximum DC voltage at pin 5 of U301.

19.Set the signal generator output to 1 mV and adjust T309 for maximum audio at pin 7 of U303.

20.Adjust VR302 for 140 mV of audio at pin 7 of U303.

21.Set the signal generator output to 1 ~V and adjust VR301 to just extinguish the number 1 LED on the front panel.

22.Set the signal generator to the channel 2 fre- quency.

Image 21
Contents ~iDD ~~~ EnWTable of Contents Description · Transmit, Receive & Audio Circuit BoardsChapter Controls and Connections 27160-8-00I-A MIC on PUSIH-lO-TALKIFront Panel-BTR200 27160-B-002-A Speaker / Local Monitor 8 n MINRear Panel BTR-200 Rear Panel Refer to Figure Location of Rev Level for Versions 3 thru Location of Rev Level for Versions 1Receive Board Transmit Board Mechanical Parts Exploded View· BTR-200Places TRANSMIT, Receive & Audio CIRCUIT,BOARDS Transmit Board Device 1====-r===r===r====jPI=N=N=U=rM=B=EFR==~===r==~==l1 U501Q50l Q502 Q503 ~@C501 +~04Transmit Board Component Layout Foil Side Transmit Board Component Layout Component SideQ503~502 100P~ Schematic Diagram Transmit Board VersionPCB Transmit Assembly Receive Board Receive Board Receive Board Page Page Q309, Q311 Q301Q302 Q303 Q304 Q311 U304 U306 U309U303 U305 U307 U310 550 234 Voltage Tables· Receive Board Voltage Tables Receiv~ Board876 U302 123Lp~lr ~ ~ FL30~368@@R33~@R334@ a ~050~~VC303 Schematic Diagram Receive Board Version 1 PCB AssemblyReceive Board Componen~Layout Foil Side I6i?7L4~ Receive Board Component Layout Component Side VersionFrequency Dependent Components Table CJl~VOBPCB Receive Assembly PCB Receive Assembly PCB Receive Assembly 878522M VC301-VC308 GAASFET, NE PCB Receive Assembly Microphone Amplifier Receive ExpandersAuxiliary Input Amplifier Intercom DriverIntercom Input Power SupplyHeadset and Speaker Amplifiers Transmit Mixer and Filter29/3-30 Blank Block Diagram Versions 1 ToI ~OEg+0 Rl~63 jRl02 +0 0+Ov· \.AJAudio Board Component Layout Foil Side Versions 1 ~R17J UrIR1,~ Schematic Diagram Audio Board VersionHEAO~.~22C113Jo ~C-\1ilBlI.0U~r.VY..,R137Details of Board Differences Between Versions 1 LI~-.=Joqa ~.C·@5ItDCD R182 C142 ~lll ~S~!~~0113 CJC~5 +~87Versions 3, 4, Audio Board Component Layout Foil SideC2~~~R230-------L.jN,-.L!~2.-.L-.-H ~I~ ~4~ ~4S~B~~9 R21~1Daoa ~EM32 CI6~~~Ms~ ~ R224 E I fJJ~FC117H!f-V1\M,pI~£.jl,ltI1Ir-1N+--J ~1~1~2 +lQJl~i ~IR~~~~199r~PCB Audio Assembly, 878520 Versions 1 thru Rln·2 Rln36 PCB Audio Assembly 878520 Versions 1 thruTioi Display Board Component Layout Component View Display Board Component Layout Foil SideTELEX@

BTR-200 Series specifications

The Telex BTR-200 Series is a well-regarded solution in the realm of wireless intercom systems, widely utilized in broadcast, film, and live event production settings. Renowned for its reliability, user-friendly interface, and robust performance, the BTR-200 Series has become a staple for professionals seeking efficient communication solutions.

One of the standout features of the BTR-200 Series is its frequency agility. The system operates in the UHF band, allowing users to switch frequencies to avoid interference from other wireless devices. This adaptability is crucial in environments where multiple wireless systems operate simultaneously. Users can easily reprogram frequencies to ensure clear and uninterrupted communication among team members.

Another key characteristic of the BTR-200 Series is its impressive range. The systems can provide coverage up to 1,000 feet in line-of-sight applications, making it suitable for large venues. This extensive range ensures that communication remains intact even in expansive settings, such as concert halls or outdoor arenas. Additionally, the enhanced RF performance ensures minimal dropouts, contributing to seamless communication.

The BTR-200 Series also distinguishes itself with its digital circuitry, which enhances audio clarity and reduces noise. This reliance on advanced technology results in crisp communication that is essential for coordinating complex productions. The system also features a low-latency design, which is particularly valuable in live performance settings where timing is crucial.

In terms of user interface, the BTR-200 Series is engineered with simplicity in mind. The beltpack units and base station feature intuitive controls that enable quick adjustments, making them easy to operate even under the pressures of a production environment. Each beltpack supports individual volume control, allowing users to customize their audio experience according to their preference.

Moreover, the BTR-200 Series is built for durability and long-lasting operation. The robust construction of its components ensures reliability, even in challenging environments. Rechargeable batteries offer extended operating time while reducing the need for constant replacements.

In summary, the Telex BTR-200 Series stands out for its frequency agility, extensive range, digital audio clarity, user-friendly interface, and durable build quality. These features combined make it an ideal choice for professionals in the broadcasting and live event production industries, promoting seamless and efficient communication essential for successful operations. The BTR-200 Series remains a trusted solution, proving its worth time and again in various high-pressure scenarios.