LM26-16M - Wohler Technologies
Contents
1. W Wohler LM26 16M HD SD SDI Level Metering Unit Document P N 821617 Rev A Sixteen Channels HD SD SDI Input and Re clocked Output on BNC Signal Lock LEDs and Sixteen 26 Segment High Resolution LED Bargraph Level Meters User Manual CONTENTS Title and Contents Introduction Section 1 General Features and Specifications Description and Features Applications and Specifications Installation Section 2 Operation 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 LM26 16M Interconnect Block Diagram 2006 Wohler Technologies Inc ALL rights reserved Important Safety Instructions 1 Read these instructions 2 Keep these 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 Donot defeat the 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 a third grounding prong The wide blade or the third prong are provided for your safety If the prov2. Modes DIP switch sections 4 and 5 determine how peak levels are displayed for the associated Level Meters on the front panel There are four possible settings e VU VU Floating Segment e VU PPM Floating Segment PPM Only PPM PPM Floating Segment The VU VU Floating Segment selection has a VU floating segment when a Peak Hold value is selected using the Internal 10 Position DIP Switch Module see page 14 The PPM Only selection has a PPM floating segment when a Peak Hold value is selected The factory default setting is VU PPM Floating Segment See diagam below for settings LM M HD SD SDI Rear Panel DIP Switch Settings Reference Level Display Mode x 45x 9 dBfs HUUBAL vu vu Fioating segment I 18 dBfs Dii VU PPM Floating Segment 20aBfs UDUMI PPM only mji Not Used UUUUUU PPM PPM Floating Segment 123456 123456 Note DIP sections 1 and 6 are not used SDI Input Connector This BNC connector input is configured for a 75 Q unbalanced connection and accepts HD SDI High Definition 1 5 GB s or SD SDI Standard 270 MB s digital audio signals When an SDI signal entering the unit is ocked either the SD SDI Lock or HD SDI Lock LED on the front panel Item 3 page 8 will light up GREEN to indicate the type of SDI input signal SD SDI or HD SDI SDI Output Connector This connector outputs a re clocked copy of the SD SDI or HD SDI signal fed to the SDI Input Connector Item B Connector Att
3. SI s le5s1lv LI juawbes 9Z La Baa l LLI ss uluB6iug Od 1 AHG L 18 F poH Jead ydeibieg le PES saeog uy la juewbes 9Z La IEB aia SLI 4907 Ias as 4907 C IGS GH weibeig yoo g O9UUODI9 U Od eulbuz J A 949 yndu jeuueyd p SAV S L6L6 god u 6uda J A 949 y ndu j uueyo p SAV GLL6L6 Od eulbuz JO I A 711ndu jeuueyd p SAV GLL6L6 god eulbuz 1 W I8A 11ndu I8uueuO rt SAV GLL6L6 Aiddng 19M0d AS apo eldsiq l 9 19497 49 pow eldsiq l 9 19497 J 3 1 JuSAuoO SAV 0 IqSs qs qH apoy eldsiq l 9 19497 Y poN eldsiq l 9 19497 Jeu laia l add Ndu Ids qs qH GLL6L6 INO L 9ZIN TI 17 2006 Wohler Technologies Inc ALL rights reserved LM26 16M User Manual P N 821617 Rev A W Wohler 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 18 2006 Wohler Technologies Inc ALL rights reserved
4. ach the supplied IEC 320 power cord between this connector and mains power 100 240VAC nominal 50 60 Hz The front panel Power LED Item 4 page 8 will glow GREEN to indicate operating voltages are present 10 2006 Wohler Technologies Inc ALL rights reserved Section 2 Operation LM26 16M User Manual P N 821617 Rev A 2 Places SD SDI W Wohler Technologies Tel 1 650 589 5676 Fox 1 650 589 1355 www Wohler com oo 100 240 VAC 50 60 Hz Rear Panel Features Figure 2b 11 2006 Wohler Technologies Inc ALL rights reserved LM26 16M User Manual P N 821617 Rev A Section 2 Operation This page intentionally blank 12 2006 Wohler Technologies Inc ALL rights reserved LM26 16M User Manual P N 821617 Rev A Technical Information Level Meter Internal 10 Position DIP Switch Settings Level Meter DIP Switch Locations Level Meter Alternate Scales LM26 16M Interconnect Block Diagrams 2006 Wohler Technologies Inc ALL rights reserved 13 LM26 16M User Manual P N 821617 Rev A Section 3 Technical Information 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 919175 PCB the same PCB on which the 6 position rear panel DIP switch is located See Figure 3a page 15 for a diagram of the 919175 PCB and the DIP switch locations LM26 M HD SD SDI Level Meter Internal 10 Position DIP Switch Setting
5. agram below However if alternative scale characteristics are selected for the level meters using the Level Meter Internal 10 Position DIP Switch page 14 it is recommended that a label with the appropriate scale be applied to the front panel LED bargraph level meters See diagram below for scale comparison Scales selection includes the AES VU BBC NORDIC DIN and Custom not shown scales Contact Wohler Technologies for information about these alternative scale labels O QI OO N O O O Q OO N O Q OO N OANDARWN O OI OO N Scale Standard 16 2006 Wohler Technologies Inc ALL rights reserved Section 3 Technical Information LM26 16M User Manual P N 821617 Rev A Na32349 aqq 4eM0d Jju uu sn py ss ul uBiig ydesbieg t L HO god eldsiq udei6J1eg ju esu6 s 9z L6L6 g S HO gOd eldsiq ydeiBieg jusubes 9z CLLELE6 ZL 6 HO dod Aeldsiq ydeubieg jusubes 9z CLLEL6 9L L HO ddd Aejdsiq ydeuGieg jusubes 97 CLLELE sq31 uoleopul J907 IAS AS QAH vss WesIBerq YOO G 9 uuo51 ul W9L 9ZNWT i god PYP 18 Wdd EB ploy Jead rm ydeu pieg lt 115 PI s le5S1lv LI juewbes 9Z i Bao I ezebe 1 l ss uluBug S 18B Ceg Wdd I God leq HEB pioH Jead lt ydeibieg lt 15 PSS s leos1v LI lJu eu s 9zZ L 1 dia LL6L6 ZI ssoujubug I 0d 1 A11 I 6 Cied Wdd E PIOH Yad rm ydeu pieg lt 15 P
6. ation Installation Front Panel Features Rear Panel Features 2006 Wohler Technologies Inc ALL rights reserved 7 LM26 16M User Manual P N 821617 Rev A Section 2 Operation Front Panel Features Please refer to Figure 2a on the following page to familiarize yourself with the front panel features of the LM26 16M unit The following sections describe these features and are referenced by number to Figure 2a 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 Audio Level Meters Audio levels for the sixteen source channels are displayed via sixteen 26 segment high resolution tri color LED bargraph meters Channel numbers 1 16 are silk screened above the corresponding bargraphs All bargraph LED segments are of the tri color type green amber red Each of the four 4 channel bargraph sections is 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 10 and 14 for more information regarding level meter DIP switch settings 3 Input Signal Lock LEDs SD SDI and HD SDI One of these two LEDs will glow GREEN to indicate that the a
7. ided 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 When a 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 the unit excercise caution when touching this surface and ensure that external
8. l 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 is 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 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 DIN 45406 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 14 2006 Wohler Technologies Inc ALL rights reserved LM26 16M User Manual P N 821617 Rev A Level Meter DIP Switch Locations Section3 Technical Information Rear Panel Level Meter 4 Position DIP Switch Module see page 10 179175 919175 REV C Internal Level Meter Figure 3a 10 Position DIP Switch DIP Switch Locations on Module see page 14 919175PCB 2006 Wohler Technologies Inc ALL rights reserved 15 LM26 16M User Manual P N 821617 Rev A Section 3 Technical Information 26 Segment LED Display Alternative Scales The standard scale used on the LM26 M Series level meters 26 segment is the AES scale see di
9. 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 Fax 510 870 0811 US Toll Free 1 888 596 4537 www wohler com support wohler com 2 2007 Wohler Technologies Inc ALL rights reserved LM26 16M User Manual P N 821617 Rev A General Features and Specifications Description Features Applications Specifications Installation 2006 Wohler Technologies Inc ALL rights reserved 3 LM26 16M User Manual P N 821617 Rev A Section 1 General Features and Specifications W Wohler LM26 16M 16 Channel HD SD SDI Digital Level Metering Unit O 13 14 15 16 O o o P o E o o o E 5 m 5 4 5 5 5 E Er A PA ERA noso Q Lock op n ee Er El POWER og El E os n El se El E LM26 16M WOHLER 24 24 24 24 24 24 24 24 TECHNOLOGIES 4 30 Eh F so so G Lock 30 E 20 EB 20 xz 0 36 36 a 36 36 36 sh 2 a 4 42 2 O eB F m eB eB e O LM26 16M Front Panel The LM26 16M is a single rack 1U digital HD SD SDI audio level me
10. pplicable type of input signal SD SDI or HD SDI entering the SDI Input Connector Item B page 10 is ocked Power LED This LED glows GREEN to indicate the unit is connected to mains power and an operation voltage is present 8 2006 Wohler Technologies Inc ALL rights reserved LM26 16M User Manual P N 821617 Rev A Section 2 Operation S3ISOT1ONHO31L H3THOA s oSp d t TOO TT Figure 2a LM26 16M Front Panel Features 2006 Wohler Technologies Inc ALL rights reserved 9 LM26 16M User Manual P N 821617 Rev A 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 LM26 16M unit The following sections describe these features and are referenced by letter to Figure 2b A DIP Switch Rear Panel These DIP switch modules are used to select the bargraph Reference Level and Display Mode for the associated Level Meters on the front panel Note that each of the four DIP switch modules affects one four channel section See the descriptions and diagram below for setting information Note that DIP switch sections 1 and 6 are not used 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 Level Meters Factory setting is 20 dBfs See the diagam below for other settings including 9 and 18 dBfs Bargraph Display
11. r PPM PPM Floating Segment e Selectable Peak Hold Manual 3 Second 10 Second or Off e Selectable PPM Ballistics Type I Type II DIN 45406 or SSRT e Selectable alternate Bargraph Scales AES VU BBC NORDIC or DIN 2006 Wohler Technologies Inc ALL rights reserved A LM26 16M User Manual P N 821617 Rev A Section 1 General Features and Specifications Applications The LM M Series of HD SD SDI level metering units are an adaptable and effective way to monitor SD SDI and HD SDI digital audio in many applications The following are some of the applications where an LM Digital 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 Level Meter Type 26 Segment LED bargraph Level Gain DIP switch selectable 9 18 20 dBfs Bargraph Length 1 078 27 85 mm Bargraph Length 0 14 x 0 028 3 57 x 0 7 mm lt 10 difference between segments Adjacent Segment Off Brightness lt 1 of brightness of active segment wa AES Scale Standard Digital 60 dB w _ ooo AES Scale Standard Digital 2 dB SD SDI SMPTE259M 270 Mb s HD SDI SMPTE292M 1 5 Gb s Cable pliner Belden 1694A 140m 1 48 Gb s and 350m 270 Mb s Dimensions 3 5 x 19 x 8 89 x 483
12. s Electrical Interference As with any audio equipment maximum immunity from electrical interference requires 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 14 for setting information The input Termination Reference Level Gain calibration and 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 10 for setting information 6 2006 Wohler Technologies Inc ALL rights reserved LM26 16M User Manual P N 821617 Rev A Oper
13. s Scale Selection Peak Hold Bargraph Display PPM Ballistics Bargraph Display x234 xx x234 xx x 78xx iii Standar Digital DBBUDI I NoRpic scale MAMMA Peak Hold Manual DUUUUMU Ec268 10 Type 1 12345678910 12345678910 12345678910 See Note 2 12345678910 78xx x234 x x x234 x x IURPUENUO Not usea QWAWOUUOUL piN scate MOURN Peak Hold 3 Second N IEC268 10 Type 2 12345678910 12345678910 12345678910 12345678910 x234 x x x 2 34 xx URURI vu scae AUUT Not use IDD Peak oie 10 seconal IIB pis 45406 12345678910 12345678910 12345678910 12345678910 x234 x x x 2 34 xx ILURUUUO Bec scare AAU vo usec OOUE Peeke ai Se Sep ae 12345678910 12345678910 12345678910 12345678910 Notes 1 Switch positions 1 9 and 10 are NOT used and should be left at the factory set position 2 The Peak Hold Manual setting allows the bargraph display meters to indefinitely maintain the peak hold value until it is reset by the operator either by pressing a reset button a special option specified at time of order or by removing power and then reapplying power to the unit unplugging replugging power cord Contact Wohler for more information about this feature PPM 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 leve
14. tering unit It features one unbalanced input with an impedance of 75 Q ohm and one re clocked output both on female BNC connectors The input accepts either SD SDI or HD SDI digital signals and is adjustable for Reference Level gain via rear panel DIP switch modules Signal lock status is indicated by two separate LEDs on the front panel one for SD SDI signals and one for HD SDI signals The sixteen vertical audio level meters are 26 segment high resolution tri color red amber green LED bargraph displays with a wide dynamic range The display mode is factory set as a single segment PPM dot above a VU bar each segments color is fixed according to its position on the scale However each 4 channel bargraph meter section may be individually adjusted for a number of parameters including Display Mode Peak Hold PPM Ballistics and Alternate Scales via rear panel and internal DIP switch modules A recessed trimpot on the front panel is used to adjust the brightness of the eight LED bargraph displays e Sixteen 26 segment tri color bargraph level meters provide wide dynamic range e One HD SD SDI input on BNC connector e One re clocked output on BNC connector e Separate lock status LEDs for SD SDI and HD SDI input signals e Front panel power indication LED e Front panel bargraph brightness control e Selectable input Referrence Level 9 18 or 20 dBfs e Selectable Display Mode VU VU Floating Segment VU PPM Floating Segment PPM Only o
15. x 203 mm 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 LM26 16M User Manual P N 821617 Rev A Installation The unit should be mounted where convenient for operating persons ideally at approximately eye level for best viewing Heat Dissipation 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 Note that if the internal heat becomes elevated in the LM Series unit it is advised to ower the brightness of the LED bargraph level meters using the Bargraph Brightness Adjust Control Item 1 page 8 as this can significantly reduce the heat generated inside the chassis 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 diagram located on page 17 may be referred to for clarification of the general signal paths into the LM Series unit
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