LM30-2 - Wohler Technologies
Contents
1. O e e W x 49 46 43 40 37 34 31 28 25 22 19 16 13 10 7 5 3 2 1 0 1 2 3 6 8 10 12 14 16 49 46 43 40 37 34 31 28 25 22 19 16 13 10 7 5 3 2 1 0 1 2 3 4 6 8 10 12 14 16 LM30 4 TECHNOLOGIES 2 4 O 9 e E ee e C y Los 49 46 43 40 37 4 31 28 25 22 49 16 13 10 7 5 3 2 4 0 f 2 S39 4 2 14 16 LM60 2 TECHNOLOGIES 2 D POWER LM53 24 WOHLE TECHNOLOGIES e 4 44 1245 TT TIT TTT ELCHE DILE LM106 6 Wohler Technologies line of 1U and 2U analog audio level metering uni2. WOHLER TECHNOLOGIES WOHLER TECHNOLOGIES O e 8 Plcs LM106 6 WOHLER TECHNOLOGIES 6 Plcs 2 LM Analog Series Front Panel Features Figure 13 2006 Wohler Technologies Inc ALL rights reserved LM Analog Series User Manual P N 821604 Rev B Section 2 Operation Rear Panel Features Please refer to Figure 2b on the following page to familiarize yourself with the rear panel features of the LM Analog Series units The following sections describe these features and are referenced by letter to Figure 2b Note that the features descibed below are applicable across the entire range of available models and not just the models shown A Analog Input Connectors These 3 pin male mini Phoenix connectors accept standard Analog audio signals and are configured for balanced connections 27 k Q impedance Other connector types are available as special order items DIP Switch Rear Panel This DIP switch sets the Line Le
3. Note Position 6 of DIP switch is not functional C PowerConnector Attach a standard IEC 320 power cord between this connector and mains power 100 240 VAC nominal 50 60 Hz The front panel power LED Item 3 will glow green to indicate operating voltages are present 14 2006 Wohler Technologies Inc ALL rights reserved WOHLER TECHNOLOGIES INC INTERNAL POWER 713 Grandvlew Drive e SUPPLY APPROVEDBY South San Francisco CA 94080 UNDERWRITERSLABS 650 589 5676 FAX 589 1355 SEE POWER SUPPLY LABEL ON SIDE 50 60 Hz m CHA CHB CHA CHB CHA CHB Section 2 Operation LMxx 8 W Wohler Technologles Inc 713 GRANDVIEW DRIVE SOUTH SAN FRANCISCO CA 94080 Tel 650 589 5676 Fax 650 589 1355 CH23 CH24 CH21 CH22 CH15 CH16 CH13 CH14 CH7 CH8 CH5 CH6 CHB CHB CHB INTERNAL POWER SUPPLY APPROVED BY 100 240 VAC OL OL UNDERWRITERS LABS 50 60 Hz CCE 9 9 SEE POWER SUPPLY LABEL ON SIDE Y CH 19 CH20 CH17 CH18 CH11 CH12 CH9 CH10 CH3 CH4 CH1 CH2 SERIAL SERIAL cHA c Cinn LM53 24 12 Pics 6 Plcs WOHLER TECHNOLOGIES INC INTERNAL POWER 71
4. HO Aue suonoes feidsig 13410 1sn py sseu y ug LM Analog Series User Manual P N 821604 Rev B uonoes eldsiq jeuueu2 z 09W1 166 1 lu AuoO 161616 GOd Je ug pue e15iq Boreuy young H9019 199uuo9J91Uu JOLIN pue SINTT Ieuj lu god NS eje 18487 eubiq 6ojeuy eeu UOIMS did 1884 LII Lu mme meme 2006 Wohler Technologies Inc ALL rights reserved 24 LM Analog Series User Manual P N 821604 Rev B Notes 2006 Wohler Technologies Inc ALL rights reserved 25 LM Analog Series User Manual P N 821604 Rev B W Wohler You can now contact us at Wohler Technologies Inc 31055 Huntwood Avenue Hayward CA 94544 Phone 510 870 0810 Fax 510 870 0811 US Toll Free 1 888 596 4537 www wohler com support wohler com 26 2006 Wohler Technologies Inc ALL rights reserved
5. 3 GRANDVIEW DRIVE SOUTH SAN FRANCISCO 94080 Tel 850 589 5676 650 589 1355 CH23 CH24 CH21 CH22 CH15 CH 16 CH13 CH14 CH7 CHS CHE CHA CHB CHB CHB CHB TERIA POWER noone siafafelatel SUPPLY APPROVED BY 100 240 VAC Le 0 249 EQHEQ EQHE 0 LABEL ON SIDE a CH19 CH20 CH17 CH18 CH 12 CH9 CH10 CH3 CH1 CH2 SERIAL CHB agen A Apress at Ala lalalala Ala lalalalala HA LM53 24 Rear Panel Twenty Four Channel with Mini Phoenix Connectors 6 2006 Wohler Technologies Inc ALL rights reserved LM Analog Series User Manual P N 821604 Rev B Section 1 General Features and Specifications Front Panel Configurations The LM Analog Series of level mertering units come with a variety of different bareraph sizes and quantities The following list shows the standard front panel model configurations available LM30 2 1 Bargraph Pair 2 channels with 30 large segments LM30 4 2 Bargraph Pairs 4 channels with 30 large segments LM60 2 1 Bargraph Pair 2 channels with 60 large segments LM53 4 2 Bargraph Pairs 4 channels with 53 small segments LM53 8
6. ae 8 910 1 56 8 iEC268 10 Type 1 9 D 8 x 5 6 Extended VU Scale mnnnnnmamnnri 000 Standard Analog DIN Scale Peak Hold 3 Second d 268 10 Type 2 co 8 910 456 9 x 1 x 2 Alternate AES Scale vu scale Digital LM26 amp LM30 Peak Hold 10 Second ONLY x 8 45406 89 10 8 910 1 4 T JC 4 x 78 x Single Sample Rise BBC Scale Legacy Ext VU Scale Peak Hold Time SSRT 67 LM30 amp LM60 Only 12345678910 Digital Models ONLY Phase Correlation Display x 9 x x 9 x 00000000 rcon Pc 12345678910 12345678910 Note Switch positions 1 and 10 are NOT used and should be left at the factory setting PPPM Characteristics Ballistics The PPM characteristics determine the Integration Time rise time and Return Time fall time of the level meter The Integration Time is the time it takes for the lighted segments of the level meter after application of a 5 Khz tone at a certain reference level to rise within a specified number of dB of that level Return Time 15 the time it takes for the lighted segments of the level meter to fall a certain number of dB after removal of a 5 Khz tone
7. 0 C 9 8 Ob F Ob O SC 8C 16 LEO EPS Or oe SS III 6ojeuy YOUMS dia p 281616 Od JeAug pue e dsiq q311ueufes 901 To NN t C 9 BON F hr Gb O ze SC 8 LE HE 1e 0r Er SH Orco Ge EHO UOT EE ee at mt om ml nn suonoas 18410 OL 1sn py sseuiuBug L TIIyYn aY n s T udejBieg q31 9 S Aejasiq U9 t EE ee um 061616 494 18A1Q pue eIdsiq 21616 iii z 809 99W oen tt TTT ttt ttt gl Ill E tt d 1 1 68 21 8 94 0 0 Z 9 OLCL SI BL ZZ 92 06 56 0 09 lll d ft T d 1 1 1 PEE 1 L L r 71 jaueg 061616 494 18A11Q pue uos el dsiq 1 V HO Ii L ll lll 1 68 21 8 94 0 0 Z 9 OLZL SL 8
8. O e O 1 woes OG 4 4 40 7 4H M 25 A 9 6 8 d 7 5 3 2 4 0 4 4 d 4 0 2 n Lm6o2 TECHNOLOGIES 2 O 9 O LM60 2 Front Panel 1U Two Channel Analog Level Meter unit with 60 Segment Bargraphs O e e O W i x 49 46 43 40 37 34 31 28 25 22 19 16 13 10 7 5 3 2 1 0 1 2 3 4 6 8 10 12 14 16 49 46 43 40 37 34 31 28 25 22 19 16 13 10 7 5 3 2 1 0 1 2 3 6 8 10 12 14 16 LM30 4 TECHNOLOGIES 2 4 O 9 O LM30 4 Front Panel 1U Four Channel Analog Level Meter unit with 30 Segment Bargraphs available in standard 2 and 4 channel e POWER LM53 24 WOHLER TECHNOLOGIES LM53 24 Front Panel 2U Twenty Four Channel Analog Level Meter unit with 53 Segment Bargraphs 2006 Wohler Technologies Inc ALL rights reserved 7 LM Analog Series User Manual P N 821604 Rev B This page left intentionally blank 8 2006 Wohler Technolog
9. LM53 amp LM106 lt 10 difference between segments LM30 amp LM60 lt 8 difference between segments Adjacent Segment Off Brightness 196 of brightness of active segment Dynamic Range LM30 65 dB LM60 66 5 dB Extended VU Standard Analog Scale LM53 66 dB LM106 72 dB Midscale Resolution LM30 amp LM53 1 dB Extended VU Standard Analog Scale LM60 amp LM106 0 5 dB Analog Full Scale Input 24 dBv Input Sampling Rate 2248 kHz Analog Input Impedance 27k Q Ohm balanced Input Connectors mini Phoenix female Standard AC Mains Power 100 250 VAC 50 60 Hz universal input auto switch Power Consumption 25 watts 1U or 40 watts 2U maximum Dimensions 1U 8 5 x 19 x 8 89 x 483 x 203 mm 2U 1 75 x 19 x 8 44 x 483 x 208 mm 10 8 lbs 3 5 kg 20 12 Ibs 5 kg Units are certified to meet at time of manufacture all currently applicable product safety and EMC requirements such as those of CE 0 dbv ref 0 775V RMS Features and specifications subject to improvement without notice 2006 Wohler Technologies Inc ALL rights reserved 5 LM Analog Series User Manual P N 821604 Rev B Section 1 General Features and Specifications Rear Panel Configurations The 1U rear panels are comprised of modular panel sections One to two of the modular panel sections have the audio input connectors and DIP switch module with any remaining sections being a blank panel This arrangement per
10. of a certain reference level The PPM characteristics available for selection using DIP switch sections 7 and 8 of the 10 position Internal DIP Switch as shown in the above diagram are as follows IEC268 10 Type 1 Integration Time is 5 ms 2 dB Return Time is 1 7 seconds 20 dB IEC268 10 Type 2 Integration Time is 10 ms 2 dB Return Time is 2 8 seconds 24 dB Integration Time is 5 ms 2 dB Return Time is 1 5 seconds 20 dB Single Sample Integration Time is a single sample Return Time is 1 5 seconds 20 dB 18 2006 Wohler Technologies Inc ALL rights reserved LM Analog Series User Manual P N 821604 Rev B Level Meter DIP Switch Locations Rear Panel Level Meter 6 Position DIP Switch Module see page 14 celo ella 186 179174 RENE 919174 REV C L1 Internal Level Meter Figure 3a 10 Position DIP Switch DIP Switch Locations on Module see page 18 2006 Wohler Technologies Inc ALL rights reserved 19 LM Analog Series User Manual P N 821604 Rev B Section 3 Technical Information Level Meter Alternate Scales The standard scale used on the ALM Analog Series of level meters is the Extended VU scale However if alternative scale characteristics are selected for the level meters by setting the Alternate Scale DIP switches see page 18 it is recommended that a label with the appropriate scale be applied to the front panel LED bargraph level meters Alternate scales include the Lega
11. 27 24 21 18 5 2 9 6 3 T 9 0 uhh DIN 50 40 30 20 10 5 0 45 20 2006 Wohler Technologies Inc ALL rights reserved LM Analog Series User Manual P N 821604 Rev B Level Meter Alternative Scales 60 Segment LED Bargraph 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 CECDCDODODOPOPCEDPCECEDECOCCCCCUDECUODECELEEEEETTTEETETTTTTE Extended VU 49 46 43 40 37 Standard Analog 6 8 10 12 14 56 Legacy 4 7 10 13 16 18 2 Extended VU VU 3 BBC 1 2 3 4 5 6 NORDIC DIN 30 Segment LED Bargraph 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Extended VU 49 46 43 40 37 34 31 28 25 22 19 16 13 10 7 5 3 2 1 0 1 2 3 4 6 8 10 12 14 16 Standard Analog Legacy Extended VU 45 43 40 37 34 31 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 1 2 4 7 10 13 16 18 20 VU BBC NORDIC DIN 50 40 30 5 20 5 L 21 2006 Wohler Technologies Inc ALL rights reserved LM Analog Series User Manual P N 821604 Rev B Section 3 Technical Information Phase Correlation Indication and Labeling Since it is sometimes helpful to observe phase relationships between two signals being monitored a Phas
12. 3 Grandvlew Drive SUPPLY APPROVED BY South San Francisco CA 94080 UNDERWRITERS Lass 650 589 5676 FAX 589 1355 SEE POWER SUPPLY LABEL ON SIDE C 50 60 Hz SERIAL NO 100 240 VAC e LM Analog Series User Manual P N 821604 Rev B LMxx 2 Rear Panel Features les LM Analog Ser 2006 Wohler Technologies Inc ALL rights reserved 2b Figure 15 LM Analog Series User Manual P N 821604 Rev B Section 2 Operation This page left intentionally blank 16 2006 Wohler Technologies Inc ALL rights reserved LM Analog Series User Manual P N 821604 Rev B Technical Information Level Meter Internal 10 Position DIP Switch Settings Level Meter DIP Switch Locations Level Meter Alternate Scales Phase Correlation Indication and Labeling LM53 and LM106 Interconnect Block Diagrams LM30 and LM60 Interconnect Block Diagrams 2006 Wohler Technologies Inc ALL rights reserved 17 LM Analog Series User Manual P N 821604 Rev B Operation Level Meter Internal 10 Position DIP Switch Settings This 10 position DIP switch is accessed by removing the top cover of the LM unit and is located on the 919174 PCB the same PCB on which the 6 position rear panel DIP switch is located See Figure 3a page 19 for a diagram of the 919174 PCB and the DIP switch location LM Analog Series Level Meter Internal 10 Position DIP Switch Settings Peak Hold Bargraph Display PPM Ballistics Bargraph Display TOD Gar Meses onc
13. 4 Bargraph Pairs 8 channels with 53 small segments LM53 24 12 Bargraph Pairs 24 channels with 53 small segments LM106 2 1 Bargraph Pair 2 channels with 106 small segments LM106 4 2 Bargraph Pairs 4 channels with 106 small segments LM106 6 3 Bargraph Pairs 6 channels with 106 small segments Below are examples of five of the nine standard front panel configurations that can be ordered e e il TECHNOLOGIES O LM106 6 0 28 MMM ul an m MMM 6 LM106 6 Front Panel 1U Six Channel Analog Level Meter unit with 106 Segment Bargraphs available in standard 2 4 and 6 channel e e e O W 1 3 s CN W D j 3 LL s 4 4 iuuat mes LM538 WOHLER nh TEGMDLOGES 5 NT CN 0 LM53 8 Front Panel 1U Eight Channel Analog Level Meter unit with 53 Segment Bargraphs available in standard 4 6 and 8 channel
14. W Wohler LM Analog Series Level Meter Units Two Four Six Eight or Twenty Four Channel With 30 53 60 or 106 Segment LED Bargraph Level Meters Document P N 821604 Rev B User Manual CONTENTS Title and Contents Introduction Section 1 General Features and Specifications Description and Features Applications and Specifications Rear Panel Configurations Front Panel Configurations Section 2 Operation Installation Front Panel Features Rear Panel Features Section 3 Technical Information Level Meter Internal 10 Position DIP Switch Settings Level Meter DIP Switch Locations Level Meter Alternate Scales Phase Correlation Indication and Labeling LM53 LM106 Interconnect Block Diagrams LM30 and LM60 Interconnect Block Diagrams 2006 Wohler Technologies Inc ALL rights reserved Important Safety Instructions 1 Read these instructions 2 Keepthese instructions 3 Heed all warnings 4 Follow all instructions 5 Do not use this apparatus near water 6 Clean only with dry cloth 7 Do not block any ventilation openings Install in accordance with the manufacturer s instructions 8 Donotinstall near any heat source such as radiators heat registers stoves or other apparatus including amplifiers that produce heat 9 Donotdefeatthe safety purpose of the polarized or grounding type plug A polarized plug has two blades with one wider than the other A grounding type plug has two blades and
15. a third grounding prong The wide blade or the third prong are provided for your safety If the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet 10 Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus 11 Only use attachments accessories specified by the manufacturer 12 Use only with the cart stand tripod bracket or table specified by the manufacturer or sold with the apparatus Whena cart is used use caution when moving the cart apparatus combination to avoid injury from tip over 13 Unplug this apparatus during lightning storms or when unused for long periods of time 14 Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as when power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped 15 Do not expose this apparatus to rain or moisture 16 The apparatus shall be connected to a mains socket outlet with a protective earthing connection CAUTION In products featuring an audio amplifier and speakers the surface at the side of the unit where the audio amplifier heat sink is internally attached may get very hot after extended operation When operating t
16. both bargraphs of a stereo pair Behavior of the Phase Correlation indication is as follows Positive correlation ascending AMBER bar in the lower or right bargraph Negative correlation ascending RED bar in the upper or left bargraph Below is a list of how many lower segments are used by each type of LED bargraph display for Phase Correlation indication 53 Segment Bargraph LM53 first nine 9 segments 106 Segment Bargraph LM106 first Thirteen 13 segments 30 Segment Bargraph LM30 first Five 5 segments 60 Segment Bargraph LM60 first Ten 10 segments One additional segment above the active correlation region is always OFF to serve as a marker The Phase Correlation display is visible ONLY so long as the VU audio level is above this blank segment tenth from the bottom on 53 segment bargraph fourteenth segment up on a 106 segment sixth on 30 segment bargraphs and eleventh on the 60 segment bargraphs UU UU LDCLIDUGUDCLIDCGOGGLIDCLIOCCIOUCIL UU UU 22 2006 Wohler Technologies Inc ALL rights reserved Section 3 Technical Information LM Analog Series User Manual P N 821604 Rev B 0 0180 v ou 199uuoo1 lul uonoes ejdsig jeuueu2 p 00 1 aan Re kam TS 281616 aod pue feldsig 901 21616 NN z CORRE EE EEE EEE EEE EN EEE EE RER cc E ETE ETT E I
17. cc 9c 06 SE 0 0G E I EE EE d od Jd tt 1 1 1 1 H9 LE L l m m IIo d fe dsiq 19410 01 1sn py ss uluBug q31 2019 199uu0oo 191u JOLIN PUE SSiN DULL EE EH Z Z u 23 2006 Wohler Technologies Inc ALL rights reserved 001 90 19ouu091aju uonoes ejdsig jouueu5 z fojeuy z 09W7 isnipy ydesbieg q31 161616 GOd pue 161616 GOd pue eIdsiq 06 eIdsiq 0 e F P Section 3 Technical Information isnipy g q31 161616 8Od pue e dsiq qa11ueufes oe YOUMS did 8 9 pr Et Ct O C E G L 01 1 9 6 22 90 80 LE YE 80F 85 95 6F eIdsiq 06 DLAC LO b Et G L 01 8 9 61 20 90 892 E YE LE OF Er 9 6
18. cy Extended VU LM30 and LM60 only VU BBC NORDIC and DIN scales The Extended VU scale is the standard scale for all LM Analog Series models See the diagrams below for 53 and 106 segment alternate scales See the diagrams on the facing page for the 30 and 60 segment alternate scales Contact Wohler Technologies for more information about Alternate Scale labels 53 Segment LED Bargraph LE d 43 43 t b 413 1 OB E Y Extended VU 150 40 35 30 26 22 18 15 1210 6 2 04244648 12415 Standard Analog 1 1 1 1 d od VU 20 15 10 7 5 3 2 1 0 1 2 3 OS 1 2 3 4 5 6 7 L l NORDIC 42 36 33 30 27 24 21 18 15 12 9 6 3 T 3 6 9 12 DIN 50 40 30 20 10 5 0 5 106 Segment LED CCC cc A TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT Extended VU 55 52 49 46 43 40 37 34 31 28 25 22 20 18 16 14 12 10 8 6 4 2 0 2 4 6 8 12 15 Standard Analog 1 VU 2 15 10 7 5 3 2 1 0 R B BBC 1 2 3 4 5 6 7 VI A RA OR NORDIC 42 36 33 30
19. e Correlation feature can be implemented within the lower section of an existing bargraph pair in the LM Analog Series units This feature may be turned ON and OFF by setting the Level Meter Internal 10 Position DIP Swich module see page 18 Below are illustrations of the level meter bargraphs with the Phase Correlation labels applied 7 19 16 13 10 EN a 1 1 a 1 2 3 4 6 8 10 12 14 16 Q o z o 2 LM30 Horizontal Bargraph with Phase Correlation Labels On H QE EE LUE TT ul 37 34 31 28 25 22 20 18 16 14 12 10 8 6 4 2 E EALLI 50 40 3 30 26 2 18 15 12 10 6 2 0 2 4 6 8 412415 5 s 8 8 ul lu LL 5 t 8 LM53 Horizontal Bargraph LM106 Horizontal Bargraph with Pase Correlation Labels with Pase Correlation Labels LM60 Horizontal Bargraph with Phase Correlation Labels LM53 Vertical Bargraph with Phase Correlation Labels umi When the audio level in BOTH channels is high enough the Phase Correlation display occupies the lower few segments of
20. e easy to visually monitor from distances of six to thirty feet 2b 60 Segment LED Bargraph Display Large LED Segments The 60 segment type of tri color LED bargraph display has a total horizontal length of 12 and features relatively large LED segments which are easy to visually monitor from distances of six to thirty feet 53 Segment LED Bargraph Display Small LED Segments The 53 segment type of tri color LED bargraph display has a total length of 2 24 and features relatively small high resolution LED segments which are easy to visually monitor for distances up to six feet Qd 106 Segment LED Bargraph Display SmallLED Segments The 106 segment type of tri color LED bargraph display has a total length of 4 42 and features relatively small high resolution LED segments which are easy to visually monitor for distances up to six feet 3 Power Indication Green LED This Power Indication LED signals the operating condition of the power supply The LED glows GREEN to indicate the LM Analog Series unit is connected to mains power and an operation voltage is present 12 2006 Wohler Technologies Inc ALL rights reserved Section 2 Operation LM Analog Series User Manual P N 821604 Rev B 28 25 22 19 16 3 2 37 34 31 28 25 22 13 10 7 5 3 2 12 WOHLER 0 12 14 TECHNOLOGIES
21. ent will turn on before that segment s scale indication the amount being one half the smallest spacing between LED segments mid scale resolution or 0 5 dBu whichever is smallest For example using the Analog extended VU scale a meter calibrated for a 4 dBu nominal level will actually turn the zero LED segment of the level meter on at 3 5 dBu and all segments will turn on at 0 5 dBu before each segment s silk screened scale indication Reference Level DIP switch sections 2 and 3 determine the Reference Level which adjusts the level of the input signal and the resultant level displayed on the LED bargraphs Factory setting is 4 dB See DIP switch diagram below for settings Bargraph Display Mode DIP switch sections 4 and 5 determine how peak levels are displayed for the associated meters on the front panel There are four possible settings VU Only VU PPM Floating Segment PPM Only and PPM PPM Floating Segment The VU Only selection has a VU floating segment when a Peak Hold value is selected using the Internal 10 Position DIP Switch Module see page 18 The factory default setting is VU PPM Floating Segment See diagam below for settings LM Analog Series Rear Panel DIP Switch Settings Meter Calibration Reference Level Display Mode 45x cae TRI won Operate lli VU PPM rating segment 125458 42000 PPM Not usea 123456 123456
22. he unit excercise caution when touching this surface and ensure that external materials which may be adversely affected by heat are not in contact with it There is a Hot Surface label see diagram attached to the aforementioned surface of the product Introduction Congratulations on your selection of a Wohler Technologies product We are confident it represents the best performance and value available and we guarantee your satisfaction with it If you have questions or comments you may contact us at Wohler Technologies Inc 31055 Huntwood Avenue Hayward CA 94544 Phone 510 870 0810 510 870 0811 US Toll Free 1 888 596 4537 www wohler com support wohler com 2 2007 Wohler Technologies Inc ALL rights reserved LM Analog Series User Manual P N 821604 Rev B General Features and Specifications Description Features Applications Specifications Congurations Rear Panel Configurations Front Panel Configurations 2006 Wohler Technologies Inc ALL rights reserved 3 LM Analog Series User Manual P N 821604 Rev B Section 1 General Features and Specifications WWohler Analog Series Level Metering Units
23. ies Inc ALL rights reserved LM Analog Series User Manual P N 821604 Rev B Operation Installation Front Panel Features Rear Panel Features 2006 Wohler Technologies Inc ALL rights reserved 9 LM Analog Series User Manual P N 821604 Rev B Section 2 Operation This page left intentionally blank 10 2006 Wohler Technologies Inc ALL rights reserved LM Analog Series User Manual P N 821604 Rev B Section 2 Operation Installation Mounting The unit should be mounted where convenient for operating persons ideally at approximately eye level for best viewing Heat Dissipation Heat produced by these units is negligible No special considerations for cooling are necessary as long as the ambient temperature inside the rack area does not exceed approximately 40 C 104 F Mechanical Bracing The chassis is securely attached to the front panel at six points along its surface not just at the four corners of the chassis ears This feature will reduce or eliminate rear bracing requirements in most mobile portable applications The weight of internal components is distributed fairly evenly around the unit Audio Connections Connection of the audio feeds is straightforward The system interconnect block diagrams located on pages 23 and 24 may be referred to for clarification of the general signal paths into the LM Analog Series units Electrical Interference As with any audio equipment maximum immunity from electrical interference require
24. ion feature on off Selectable alternate Bargraph Scales Extended VU VU BBC NORDIC DIN and CUSTOM Front panel bargraph brightness control 4 2006 Wohler Technologies Inc ALL rights reserved LM Analog Series User Manual P N 821604 Rev B Section 1 General Features and Specifications Applications The LM Analog series of level metering units are an adaptable and effective way to monitor any analog audio application The following are some of the applications where an LM Series unit would prove valuable Radio Broadcast Station Cinema TV Control Room Theatrical Staging Mobile Broadcast unit Music Design Application Remote Radio Station Broadcasting Schools Sound Staging development Home Theater Recording Studio Any Aural Media applications Specifications Segment Quantity Small Segments LM53 253 LM106 106 Large Segments LM30 30 LM60 60 Level Gain DIP switch selectable 0 4 6 8 dB Bargraph Length 2 22 56 4 mm 4 44 56 4 mm 6 56 4 mm 12 56 4 mm LED Segment Size LM53 amp LM106 0 14 x 0 028 3 57 x 0 7 mm LM30 LM60 0 305 x 0 152 7 75 x 3 86 mm LED Segment Pitch LM53 amp LM106 0 041 1 05 mm LM30 amp LM60 0 2 5 08 mm Segment Display Color Tri color red amber green Peak Emmision Wavelength Green 570 nm Red 630 nm Segment Brighness If 20 mA LM53 amp LM106 3 5 mcd LM30 amp LM60 5 5 mcd Segment Brightness Uniformity
25. mits mixing of different types of input modules although such mixes are considered special order items 1U Rack Model Rear Panels Figure 1a below shows the standard 4 channel input section with the mini Phoenix connectors available for use in the IU LM Analog models 6 5 FIGURE 1a 4 Channel Input Section with Mini Phoenix Connectors standard The two rear panel illustrations below show the standard rear panel configurations for an 8 channel LMxx 8 model top and a 2 channel LMxx 2 model bottom in the LM Analog series For models featuring a different quantity of inputs the rear panel would have a different quantity of input sections and or connectors saisie lla d Al 100 240 Vac r9vrse LMxx 8 Rear Panel 8 Channel Wi WoHLER TECHNOLOGIES INC INTERNAL POWER 713 Grandview Drive e SUPPLY APPROVED BY South San Francisco CA 94080 GADERWArTERS 850 589 5676 FAX 589 1355 SEE PONER SUPPLY LABELON SIDE C CHA CHB CHB d SERIAL NO 50 60 Hz Risiaiatale 1 100 240 VAC cds e e LMxx 2 Rear Panel 2 Channel 2U Rack Model Rear Panel The rear panel illustration below shows the 2U size rear panel for the LM53 24 model which is NOT comprised of modular panel sections as are the 1U rear panels This rear panel is available only with mini Phoenix connectors
26. ont panel features of the LM Analog Series units The following sections describe these functions and are referenced by number to Figure 2a Note The following feature descriptions are applicable across the entire range of available models The four models shown are used to illustrate the four different bargraph types available in the LM Analog Series Bargraph Brightness Control This control is recessed into the front panel and can be accessed using a small flathead screwdriver Turning it clockwise will increase the relative brightness of the bargraph LED segments Adjusting this one control will simultaneously affect the brightness of all bargraph displays on the front panel 2 Audio Level Meters Audio levels for the source channels are displayed via pairs of tri color LED bargraph meters Each pair represents two channels There are four bargraph types available in the LM Analog Series 30 53 60 and 106 segment All bargraph LED segments are of the tri color type green amber red and are user adjustable for Referrence Level Display Mode Peak Hold PPM Ballistics and Alternate Bargraph Scales via DIP switches on the rear panel and inside the unit See pages 14 and 18 for more information regarding level meter DIP switch settings 2a 30 Segment LED Bargraph Display Large LED Segments The 30 segment type of tri color LED bargraph display has a total horizontal length of 6 and features relatively large LED segments which ar
27. s the use of shielded cable however satisfac tory results can sometimes be obtained without it The internal circuitry common is connected to the chassis AC Power The unit s AC mains connection is via a standard IEC inlet with safety ground connected directly to the unit s chassis The universal AC input 100 240VAC 50 60 Hz switching power supply is a self resetting sealed type with automatic over voltage and over current shutdown There is no user replaceable fuse in either the primary or secondary circuit Level Meter Parameter Settings The Peak Hold PPM Ballisatics and Alternate Scale level meter settings are selected using a DIP switch accessable only by removing the top cover of the unit Should the user wish to change these settings it should be done before installation into an enclosed rack or difficult to access area See page 18 for setting information The Reference Level Gain calibration and the bargraph Display Mode settings may be selected after installation via the DIP switch es on the rear panel as long as the rear panel is easily accessable If installation makes the rear panel difficult to access then these adjustments should be made before installation See page 14 for setting information 2006 Wohler Technologies Inc ALL rights reserved 11 LM Analog Series User Manual P N 821604 Rev B Section 2 Operation Front Panel Features Please refer to Figure 2a on the following page to familiarize yourself with the fr
28. ts provide from one to twelve pairs of 53 segment level meters LM53 one to three pairs of 106 segment level meters LM106 one to two pairs of 30 segment level meters LM30 or one pair of 60 segment level meters LM60 LM106 6 O Standard input connectors for the LM Analog Series are mini Phoenix type terminal block connectors XLR connector inputs are available as a custom option for all versions except the LM53 24 Input connector type is determined by the customer at time of ordering Analog input connector impedances are 27 K 2 ohm balanced and may be adjusted for Reference Level gain via a rear panel DIP switch es The standard display mode is set as a single segment PPM dot above a VU bar each segment s color is fixed according to its position on the scale Each bargraph meter section pair may be individually adjusted for a number of parameters including Display Mode Peak Hold PPM Ballistics Alternate Scales and Phase Correlation via rear panel and internal DIP switches An Auto Line Level Calibrate feature is also available 30 60 53 or 106 segment tri color bargraph level meters provide wide dynamic range Selectable input Referrence Level 0 4 6 or 8 dBfs Selectable Display Mode VU Only VU PPM or PPM Only e Selectable Peak Hold Manual 3 Second 10 Second or Off Selectable PPM Ballistics Type I Type II DIN 45406 or SSRT Selectable Phase Correlat
29. vel Calibration Reference Level and PPM VU Display Mode See the descriptions and diagram below for setting information Line Level Auto Calibration The unit is calibrated at the factory To recalibrate 1 Turn on the power 2 Apply the desired reference level nominal 0 signal to all channels 3 Make sure the Reference Level DIP sections 2 and 3 are set to the nearest level of the input signal being applied for calibration i e 0 4 6 or 8 The user should make sure that the signal applied to all four channels is within 4 dB of the reference level selected by DIP switch sections 2 and 3 4 Place DIP section 1 in the DOWN position 5 Wait 10 seconds The unit will remove the previous calibration and the new calibration will be applied 6 Place DIP section 1 in the UP position and return unit to service 7 Only ONE auto calibration attempt may be made for each cycling of AC power to the unit Once the Line Level Calibration DIP switch has been placed in the CAL position it is necessary to cycle the power before that DIP switch will be functional again EVEN ifa calibration attempt was unsuccessful If one wishes to calibrate again turn off the power to the unit and repeat steps 1 through 6 LEVEL METER CALIBRATION NOTE For more accurate indication of signal levels meters are tuned to effect a rounding function which occurs BETWEEN the thresholds of any two bargraph segments This means the level meter zero LED segm
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