Lectrosonics SR Instruction Manual Download Page 5

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UHF Digital Hybrid Wireless

Rio Rancho, NM

General Technical Description

SmartDiversity

™

allows each receiver to run indepen-

dently to provide two separate audio channels. The

algorithm analyzes both the incoming RF level and the

rate of change in RF level to determine the optimum

timing for phase switching, and the optimum antenna

phase. The system also employs “opportunistic switch-

ing” to analyze and then latch the phase in the best

position during brief squelch activity.
Ratio Diversity blends the audio outputs of both receiv-

ers in a seamless manner to produce a single audio

output. A panning circuit blends more signal from the re-

ceiver with the stronger RF signal over a wide RF level

range to anticipate and eliminate dropouts long before

they occur. When a good RF signal is present at both

receivers and the audio is blended equally, the signal to

noise ratio is increased by 3 dB.

The SRa5P and SRa consists of two separate receivers

built into a single, ultra compact housing with inter-

changeable adapters for video camera wireless receiver

slots and stand-alone use. Digital Hybrid Wireless

technology provides superb, compandor-free audio

quality and compatibility with other wireless systems.

The RF performance is extremely stable over a very

wide temperature range, making the receiver perfectly

suited to the rough environmental conditions found in

field production.

The front panel features a menu-driven LCD interface

and four membrane switches used to view and alter set-

tings. Audio outputs are provided on the rear panel for

camera slots or other audio devices, and in the case of

the SRa5P, on the front panel through a 5-pin TA Series

connector.

A built-in spectrum analyzer scans across the tuning

range of the receiver to locate RF signals in the vicinity

to simplify finding clear operating frequencies.

RF PCB Block Diagram

Ref. Osc

SAW

filter

RF amp

Splitter

Phase
switch

Mixer

amp

243.950 MHz

SAW

filter

SAW

filter

amp

243.950 MHz

Rx IC

250 kHz

RSSI

Window

detect

Audio 1

Pulse

detector

1st

VCO

2nd

VCO

PLL

µP

SAW

filter

RF amp

Splitter

Phase
switch

Mixer

amp

248.450 MHz

SAW

filter

SAW

filter

amp 248.450 MHz

Rx IC

350 kHz

RSSI

Window

detect

Audio 2

Pulse

detector

1st

VCO

2nd

VCO

PLL

µP

Receiver 1

Receiver 2

High side
injection

244.200 MHz

248.800 MHz

SR Dual Receiver RF Board

Audio PCB Block Diagram

µP

DSP

Keypad

LCD

display

DAC

Codec

Memory

Ref xtal

Audio 1

Audio 2

(from RF PCB)

To both PLL

To phase switches

Audio amps

Digital po

µP

digital

atten

audio switch

Fuse

Camera

power in

Osc

sync

DC-DC

conv

DC-DC

conv

DC-DC

conv

On/Off

–5V

+5V

Osc

sync

+1.6V

+3.3

V Reg

+3.3V

–

Com

+5V

–

Com

+5V

Diode

protected

outputs

Summary of Contents for SR

Page 1: ...F Receivers SR SRa SRa5P Featuring Digital Hybrid Wireless Technology INSTRUCTION MANUAL Rio Rancho NM USA www lectrosonics com Fill in for your records Serial Number Purchase Date U S Patent 7 225 135 Quick Start Summary on Page 3 ...

Page 2: ...SRa5P and SRa Dual Receivers LECTROSONICS INC 2 ...

Page 3: ... camera slot adapter kit the antennas and position the receiver as it will be used see pages 9 12 Connect power to the receiver see pages 10 11 Set the COMPAT compatibility mode for the trans mitters to be used see pages 15 16 Find clear operating frequencies for one or both receivers see pages 19 21 NOTE When operating in the 2 channel mode always set Receiver 2 to a higher frequency than Receive...

Page 4: ...Buttons 8 Rear Panel and Adapters 8 Camera Slot Adapters 9 Installing Camera Slot Adapters 9 Adapters for Stand alone Use 10 Installing Rear Panel Adapters 10 Battery Adapter 10 Audio Output Cables 11 External Power Cables 11 External Power Supply 11 Mounting and Orientation 12 Main Window LCD 13 LCD Backlight Setup 14 Navigating the LCD 15 Main Window 16 Frequency Screen 16 Setup Screens 16 Front...

Page 5: ...nge making the receiver perfectly suited to the rough environmental conditions found in field production The front panel features a menu driven LCD interface and four membrane switches used to view and alter set tings Audio outputs are provided on the rear panel for camera slots or other audio devices and in the case of the SRa5P on the front panel through a 5 pin TA Series connector A built in sp...

Page 6: ... occur when the power is turned on or off The pilot tone frequency is different for each of the 256 frequencies in the tuning range of a system frequency block This eliminates squelch problems in multichannel systems where a pilot tone signal can appear in the wrong receiver via intermodulation products The DSP generated pilot tone also eliminates fragile crystals allowing the receiver to survive ...

Page 7: ...on on RF signal strength Perfor mance of the two systems is virtually identical but the noise based system requires no calibration and there is no better way to track the signal to noise ratio than to measure it directly RF Controlled Digital Noise Filter In extremely weak signal conditions an RF sensitive variable frequency filter is applied to reduce the high frequency response of the receiver T...

Page 8: ...ower off It also functions as a back button while navi gating the various menus and setup screens to return to the previous screen or menu item The firmware remembers whether the receiver was turned on or off after power is disconnected and it returns to that state when power is restored This allows the receiver to power up and down as the camera is turned on and off Press the PWR BACK button from...

Page 9: ...side thread two long screws through the tabs on the receiver flange then align them with the tabs on the adapter Slide the adapter up and tighten the retaining screws to secure it to the receiver flange The four lower screws attach to the camera body SRSNY Adapter Two different types of screws are used to attach the receiver flange and the adapter Thread the smaller thin head screws through the ad...

Page 10: ...ble bag systems Two balanced output cables and the power cable are 6 feet long Cut the cables to the desired length and terminate as needed Battery Adapter The receiver can be powered with an optional battery sled adapter that attaches to the outside of the housing Two mirror image versions of the adapter are available SRBATTSLEDTOP Positions the battery on top of the receiver for mounting on the ...

Page 11: ...ing set screws and wrenches MCSRPT 12 inch long TA3 female to stripped and tinned wires for balanced output PIN 1 Shield PIN 2 Audio white PIN 3 Audio green MCSRXLR 12 inch long TA3 female to XLR male 3 pin for balanced output PIN 1 Shield PIN 2 Audio PIN 3 Audio MCSRTRS Male 3 5 mm TRS plug to two female TA3 mini XLR connectors for dual channel use External Power Cables 21747 Locking LZR style pl...

Page 12: ...in horizontal and vertical positions using the mounting foot SRSLEEVE Mount An optional mounting sleeve is available to simplify mounting the receiver on camera body battery brack ets and other locations The sleeve is furnished with a hook loop Velcro swatch for mounting on flat surfaces SRHARDWARE Cold Foot Adapter This hardware and adapter kit allows the SRSLEEVE to be mounted on a cold shoe A r...

Page 13: ... mode and the other when RATIO DIVERSITY is Selected The icon changes in size horizontally to indicate the audio level modulation of the signal received from the transmitter The icon display will change to a solid rectangular block when the audio signal is being limited in the transmitter Battery Levels When the COMPAT mode is set for a compatibility mode that supports battery telemetry 400 and 20...

Page 14: ...n on the power The unit will boot up then display the Backlight Options screen Use the UP and DOWN arrows to select the desired back light operating mode DOWN DOWN ON BKLIGHT 30 SEC BKLIGHT OFF BKLIGHT UP UP DOWN 5 MIN BKLIGHT UP Remains on Dims after 30 seconds Dims after 5 minutes Remains off ...

Page 15: ... RECEIVER 2 Press UP DOWN to select FUL NOR Press SEL to select receiver FUL NOR LEVEL SETUP SCAN SETUP DIVMODE SETUP COMPAT SETUP SmtNR SETUP PHASE SETUP TXBAT SETUP MIXMODE SETUP TONE SETUP SEL BACK PHASE PHASE RECEIVER 1 RECEIVER 2 Press UP DOWN to select Press SEL to select receiver SEL BACK TXBAT TXBAT RECEIVER 1 RECEIVER 2 Press UP DOWN to select Press SEL to select receiver SEL BACK MIXMODE...

Page 16: ...evel of the receiver in dBu Use the Sel Up or Down buttons to change the level Range is from 50 to 5 dBu in 1 dB steps Press the Sel button to leave this screen The output levels at the two jacks may be set indepen dently regardless of the diversity mode setting SCAN This function provides a fast and reliable method of finding clear channels for each receiver Press Sel to start the scanning Follow...

Page 17: ... not included in the group letter will blink in this case SmtNR This setup screen is available only in the 400 Series COMPAT compatibility mode Select the desired mode while listening to the audio to of one of three choices OFF provides no noise reduction for complete transparency which is useful in controlled environ ments with very little high frequency noise such as an indoor motion picture pro...

Page 18: ...reen prompts you to press the UP or DOWN button to enable the tone at the receiver output The first screen prompts you to press the UP or DOWN button to start the tone RECEIVER 2 TONE 00 05 Once the button is pressed a 1 kHz tone is enabled and its level can be adjusted with additional presses on the UP or DOWN buttons The level set here will be retained in the regular oper ating mode it will supe...

Page 19: ...the cursor are shown in the upper right corner of the screen Scanning for Clear Frequencies Press both the UP and DOWN buttons at the same time to switch to the Zoom View In this view the cursor remains fixed in the center of the screen and the back ground scrolls behind it The frequency can be stepped up and down in 100 kHz increments using the UP and DOWN arrow buttons To clear the scan memory a...

Page 20: ... 569 300 3 D tv30 594 900 3 D tv34 473 300 2 0 TV14 498 900 7 D TV18 524 500 7 D TV23 550 100 7 D tv27 575 700 7 D tv31 601 300 7 D tv35 475 500 3 6 TV14 501 100 9 3 TV19 526 700 9 3 TV23 552 300 9 3 tv27 577 900 9 3 tv31 603 500 9 3 tv36 476 200 3 D TV15 501 800 9 A TV19 527 400 9 A TV23 553 000 9 A tv27 578 600 9 A tv32 604 200 9 A tv36 Grp B 477 500 4 A TV15 503 100 A 7 TV19 528 700 A 7 TV23 55...

Page 21: ...666 100 0 5 tv46 691 700 0 5 tv50 717 300 0 5 tv55 742 900 0 5 tv59 615 500 0 B tv38 641 100 0 B tv42 666 700 0 B tv46 692 300 0 B tv51 717 900 0 B tv55 743 500 0 B tv59 616 400 1 4 tv38 642 000 1 4 tv42 667 600 1 4 tv46 693 200 1 4 tv51 718 800 1 4 tv55 744 400 1 4 tv59 617 000 1 A tv38 642 600 1 A tv42 668 200 1 A tv47 693 800 1 A tv51 719 400 1 A tv55 745 000 1 A tv59 618 300 2 7 tv38 643 900 2...

Page 22: ...gnal is received Then look at the other receivers and see if one of them is also pick ing up the signal Only the matching receiver should indicate a signal Change frequencies on either system slightly until it will pass this test then check again to see that all receivers are still on clear channels as in Step 2 4 Turn each transmitter off one at a time With all transmitters and receivers turned o...

Page 23: ...ashing when transmitter turned on Pilot tone detection can take several seconds Turn on the transmitter power and the audio switch on some models and wait 3 to 5 seconds for the P to indicate steadily Transmitter and receiver not on same frequency Receiver compatibility mode does not match the transmitter in use See Sel Selections from Main Window COMPAT Window Noise on audio and Pilot Tone Indica...

Page 24: ...e noise remains then turn the power off at the transmitter and see if it remains If the noise is still present then the problem is not in the transmitter If noise is still present when the transmitter is turned off try lowering the audio output level on the SRa5P and see if the noise lowers correspondingly If the noise remains the problem is not in the receiver Receiver output is too low for the i...

Page 25: ...geable D connector plates nominal 1k ohm unbalanced Dual TA3 male mini XLR balanced output adapter Balanced output adapter with fixed cables Front panel TA5M with two balanced outputs Audio output level Adjustable 50 to 5 dBu in 1 dB steps unbalanced output is 6 dB lower Audio channel crosstalk 80 dB or better Front Panel Controls and Indicators Sealed panel with membrane switches LCD monitors pil...

Page 26: ...y repairs Returning Units for Repair For timely service please follow the steps below A DO NOT return equipment to the factory for repair without first contacting us by email or by phone We need to know the nature of the problem the model number and the serial number of the equipment We also need a phone number where you can be reached 8 A M to 4 P M U S Mountain Standard Time B After receiving yo...

Page 27: ...UHF Digital Hybrid Wireless Rio Rancho NM 27 ...

Page 28: ...authorized dealer shipping costs prepaid within one year from the date of purchase This Limited Warranty is governed by the laws of the State of New Mexico It states the entire liablility of Lectrosonics Inc and the entire remedy of the purchaser for any breach of warranty as outlined above NEITHER LECTROSONICS INC NOR ANYONE INVOLVED IN THE PRODUCTION OR DELIVERY OF THE EQUIPMENT SHALL BE LIABLE ...

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