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POTS/ISDN/W
ATRIX
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ABLE OF
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ECTION
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Matrix Product Manual
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ONNECTORS
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ESCRIPTION
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Related Manuals for Comrex Matrix
Summary of Contents for Comrex Matrix
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Page 1: Table Of Contents
POTS/ISDN/W ATRIX IRELESS ODEC Matrix Product Manual ABLE OF ONTENTS 1 ..I ..................6 ECTION NTRODUCTION ......M ................ 6 ATRIX EATURES ......P ............... 6 ORTABLE UNIT INCLUDES ......R ............6 ACKMOUNT UNIT INCLUDES ......A ..............7 BOUT THE LGORITHM ......W ? ............ - Page 2 Comrex Corporation ABLE OF ONTENTS CONT ......H ..............31 ANGING UP THE ......D ......... 31 ROPPING THE ONNECT URING A ......P ........32 LAIN ELEPHONE ODE VS ......U ............32 SING THE ODULE ......E ... 33 NTERING LAIN ELEPHONE SING THE ODULE ......E...
- Page 3 Matrix Product Manual ABLE OF ONTENTS CONT 9..A ................47 ECTION DDITIONAL UNCTIONS ......T ..................47 ......A ................47 NCILLARY ......C ..............48 ONTACT LOSURES ......M ..........48 ATRIX ONTROL AND IGNALS ......STL B ..............49 ACKUP ......STL B ........49...
- Page 4 Comrex Corporation ABLE OF ONTENTS CONT A..M ..............72 PPENDIX ODEM HECKLIST ........A L ............72 ITTLE ACKGROUND ........C ..............73 HECKLIST ........P 101............. 75 HONE B..A ..............77 PPENDIX BOUT INUS ........“I' !”....78 SING...
- Page 5 Most items are available off-the-shelf, either directly from Comrex or from our stocking dealers. Comrex stands behind its products. We promise that if you call us for technical assistance, you will talk directly with someone who knows about the equipment and will do everything possible to help you.
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Page 6: Ntroduction
ECTION NTRODUCTION The Comrex Matrix in its basic form is a digital audio transmission device for ana- log telephone lines. The Matrix allows wideband, broadcast quality audio over normal “toll quality” telephone circuits. Here’s a short list of the Matrix’s POTS Codec features: ♦... -
Page 7: Bout The Lgorithm
“Mix Minus” feed from the studio back to the remote site. For more on Mix-Minus, refer to Appendix B on page 77. For wireless circuits the Matrix has two options. The first is the ability to im- prove the quality of “real-time” audio on GSM wireless service, please refer to Section 8. -
Page 8: Atrix Enu Election Rees
ModMon Modem Monitor On Modem Monitor Off Levels (Rack Matrix Only) Input Level 0dBu, +4dBu, -10dBu Output Level 0dBu, +4dBu, -10dBu Store & Forward (See Page 9 for Menu Selection Tree) Qdial Enter Qdial#: 01-19 (Note: For last number redial, enter 00) - Page 9 Matrix Product Manual RIMARY AND ECONDARY SES OF UNCTION ANGUP Secondary functions: Disconnects call. 1. Backs out of any screens involving dialing functions. 2. Accesses the H (press key 3 times). IDDEN DIAL Secondary functions: Speed dials numbers 1. If pressed once when line is connected, modem drops one connect speed.
- Page 10 Comrex Corporation “H ” ATRIX IDDEN RESS THE ANGUP KEY THREE TIMES FROM THE TATUS CREEN Country Country Code 00-20 Reneg Reneg/Retrain On Retrain On None Flush Modem Erase All Settings? Enter = Continue More ISDN Enable ISDN Menus? (Rack Option Only) 1=Yes...
- Page 11 13) R NPUT EVEL ONTROL ARRIER ETECT NDICATOR 6) H 14) R EADPHONE EADY NDICATOR 7) H 15) B EADPHONE EVEL DJUSTMENT ACKLIT 8) XLR L EVEL UTPUT DJUSTMENT The rackmount and portable versions of the Matrix are described separately.
- Page 12 Comrex Corporation ORTABLE ESCRIPTION OF URFACE This provides an indication of the audio level being fed into the Matrix. It COLOR NPUT EVEL doesn’t mirror the receive audio in any way. Adjust the input levels so that the NDICATOR green light is illuminated. This LED turns red to indicate when the limiter is engaged on program peaks.
- Page 13 Power, phone lines and data connections are made on this panel. (See pages ANEL 15 & 16 for details.) When the Matrix receives an incoming call, this light will flash to indicate the ARRIER ETECT line is ringing. When the modem inside the Matrix is connected to another...
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Page 14: Ortable - Rear Panel
This 3-pin male XLR output provides a mix of codec return and local audio EVEL UTPUT from the Matrix. It is a balanced, line level audio feed, adjustable via the L and O knobs on the top surface, shown in #8 and #9 of the... - Page 15 Matrix Product Manual ORTABLE ANEL IAGRAM �� �� �� �� �� �� �� 21) T 22) T 23) M ULTI PURPOSE 24) P OWER WITCH 25) P OWER ONNECTOR 26) C ONTACT LOSURE 27) R EADY LOSURE...
- Page 16 Matrix. Be careful what you plug into here. Some PABXs provide currents which can damage the Matrix. This RJ11 jack is for attaching an external telephone to the Matrix. This can be useful for dialing complicated numbers with lots of pauses and special codes. It can also serve to provide an audible “ring”...
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Page 17: Ackmount - Front
EYPAD Qdial and hangup. Some of the keys also have secondary functions which are noted by the key. (See page 9 for more details.) When the Matrix receives an incoming call, this light will flash to indicate the ARRIER ETECT (CD) I line is ringing. -
Page 18: Ackmount Ear
17) A CCESSORY PTION LATE IEC 320 P This is an IEC connector for the main power. The Matrix works on any world- OWER wide AC power from 100-240VAC. ONNECTOR UTLET This is a 3-pin male XLR connector with balanced, line level output audio. - Page 19 This mini jack allows the user remote control of the CC button on the front ONTROL keypad. When the Matrix is on-line, a closure here will send a signal to close the CC receive relay at the far end. An asterisk will appear in the upper right corner of the far end Matrix, indicating that the signal has been received.
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Page 20: Etting Up The
AC power. Turn the Matrix on using the side panel power switch (0 = off and 1 = on). The Matrix display should light up. You will then see the introductory screen, followed shortly by the M . - Page 21 “2” for +4 dBu or “3” for -10 dBu. Whichever level you select will be stored in the Matrix until it is changed, even after being powered off. Once the cor- rect level is selected, watch the VU meter for appropriate deflection. Most users like to see a VU meter peak occasionally over the “0”...
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Page 22: Udio Onnections
Headphone Output 1 — You must have stereo headphones to use with the Matrix. Plug the headphones into the headphone jack. Feed some audio into one of the inputs. Adjust the Headphone knob for a comfortable listening level. The output mix may be adjusted to hear more local audio (audio fed to inputs) or return audio (audio fed from other end). -
Page 23: Djusting The
Matrix inputs — When driving the Matrix from an unbalanced source, con- nect pins 1 and 3 together on the Matrix input XLR. This should connect to the ground signal on your unbalanced device. Connect pin 2 on the Matrix XLR to the unbalanced device’s audio + connection. -
Page 24: Onfiguring The Ower Equence
The MaxRate option allows you to limit the maximum modem connect rate. ETTING THE The MaxRate factory default setting of a new Matrix is 24 kb/s. If the Matrix is allowed to negotiate on an unrestricted basis, it will find the highest pos- sible connect rate. -
Page 25: Max Rate
Matrix Product Manual To set the MaxRate: A. Press E from the M NTER TATUS ISPLAY B. Then press “4” for C ONFIGURE C. Then “3” for M D. Using the keypad, press the number which corresponds to the MaxRate setting you want. -
Page 26: Rogramming Dial
“blurps” that happen at the beginning of a modem connection. Under some circumstances, you may not wish to hear these things. If, for example, the Matrix in the studio were “on-air” all the time, the listeners would hear these sounds. -
Page 27: One /Pulse Dialing
Your Matrix will automatically oper- ate in this mode unless it calls or is called by a Matrix, BlueBox or Vector set to a less demanding mode or by a HotLine. If connecting to a HotLine, the Matrix will automatically switch to HotLine Mode. -
Page 28: Lacing Aall From The
ALL FROM THE ATRIX So now it’s time to use your Matrix. We will assume that all the proper con- nections have been made, and you’re ready to place a call. There are several ways to dial from the Matrix. The most common method is to dial from the built-in keypad. -
Page 29: Ialing With Dial
Matrix Product Manual If you wish to use the Comrex Matrix test line number, call 978-784-1700. You may enter up to 44 digits in a dialing string. A two second pause may be entered anywhere and used multiple times in the dialing sequence by push- ing the Q softkey. -
Page 30: Nswering Aall
In complex dialing situations, such as when an operator may be involved or IALING FROM AN XTERNAL when the dialing string is longer than 44 digits, you can dial the Matrix using HONE an external telephone set. Connect an external single line telephone set to the modular jack on the rear panel of the Matrix labeled T A. -
Page 31: Ropping The
. Note: It can take about five seconds between TATUS ISPLAY the time you terminate the call to the time the Matrix releases the line for the next call. If a telephone line degrades during a broadcast, it is possible to lower the... -
Page 32: Lain Elephone
“plain telephone” call when a modem connection cannot be established or if the far end does not have a Matrix, Vector, BlueBox or HotLine. This function is enabled in current production models through the addition of the optional TelCell module. - Page 33 You can now place a call using the EADPHONE Matrix keypad. The audio from the Matrix inputs is sent to the phone line, and you will hear everything being sent back on the phone line. Press the H key to dis- ANGUP connect your call.
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Page 34: Telephone Mode Using The Tel C Hands -Free Mode Using The Connections
TelCell module. You will need to dial the call from the mobile phone keypad, but when the far end answers, you will be able to converse through the Matrix. Press the C key to exit C ANCEL... -
Page 35: Sing Tore And Orward
Up to 9 minutes and 45 seconds of 15 kHz audio can be stored in the Matrix in nonvolatile memory. The audio will be stored until it is erased, even if the unit is powered off. -
Page 36: Forward Mode
This is the only way to exit S/F mode, since the Matrix will remain in S/F ORWARD mode, if powered off in this mode. Note: You will choose option 4 to exit S/F on a Matrix which is set to P since option 2)R (record) does not appear on a Matrix set to P... -
Page 37: Orward Operation
1)Dial 2)Rec 3)Play Press 2)R 4)Setup 5)Exit S/F If audio is already stored in the Matrix, you will be asked if you want to erase all audio. If audio is not stored, you will skip directly to D. (Note: If the 2)R option does not appear in the menu, follow the setup procedures on page 42-43 to set the Matrix for record.) -
Page 38: Ecorded Audio
Comrex Corporation Press E from the S/F S LAYING NTER TATUS ISPLAY ECORDED UDIO Record Send Press Enter or Qdial Press 3)P 1)Dial 2)Rec 3)Play 4)Setup 5)Exit S/F C. The screen will read P . The audio clip will play and the R... -
Page 39: Keypad
Dial with Ext Phone <Enter> when Ringing Dial the call using an external telephone connected to the T jack on the side of the Matrix. At the 1st ring, press the E key and hang NTER up the telephone. The Matrix will initiate the upload procedure and disconnect when... -
Page 40: Tore And Orward Udio Ut
Play Press Enter or Qdial As long as the Matrix is set to receive and there are no stored audio cuts, the Matrix will automatically answer an incoming call and initiate the download procedure. (To erase a stored audio cut, see page 41.) After a new S/F audio cut is received this way, the Matrix will not revert back to the status display but will instead enter the “ready to play”... -
Page 41: Tore And Orward Udio Ut
When a new S/F audio cut has been received, the Matrix will enter “ready LAYING A ECEIVED TORE to play” mode. Since the Matrix can only store one audio cut at a time, the ORWARD UDIO options here are limited. You basically have the choices of playing the cut, erasing the cut, or reconfiguring the Matrix When in “ready to play”... -
Page 42: Forward
B) A Matrix configured to “play” will not have the R option available in the main S/F menu. C) A Matrix configured to “play” will have a special “ready to play” menu appear after a S/F cut is loaded into its flash memory. 2) S –... -
Page 43: Etup
& F TORE ORWARD ETUP Select 1)P from the S/F setup menu to determine whether the Matrix is a recorder or a player. Then select whether you want to 1)P S/F A UDIO or you want to 2)R S/F A... -
Page 44: Orward Using Wireless
The GSM modem within the module is a vastly superior design to handheld phones for this purpose. Secondly, we’ve enabled the Matrix to use a new coding algorithm in GSM Mode. This algorithm is uniquely suited to coding voice at the ridiculously low bitrates available on the GSM data channel. -
Page 45: Gsm
GSM also has the advantage of subscription via Smart Card (SIM) so a GSM account can easily be moved from phone to phone (or phone to codec). When you use the Matrix GSM Module, you are actually “piggybacking” on GSM D BOUT the digital stream normally used for wireless voice calls. -
Page 46: Ata
GSM. The same limitations apply to high-speed offerings by CDMA systems, typically known as “1X” networks. Please refer to the “Matrix GSM Module” manual for more information and GSM M ODULE PERATION operating instructions. -
Page 47: Est
Matrix and to check out audio levels by “looping” the input audio back through to the output. It also gives the user the ability to listen to audio at various data rates. -
Page 48: Ontact Losures
, available through the ” mini jack EADY on the rear panel of the Matrix, will remain closed as long as the green R EADY light is illuminated on the front panel .. i.e. as long as the call is connected. -
Page 49: Ackup Mode
Aux connector’s status. If the connector opens, the Matrix Rack will drop the call and go back to waiting for the next closure. To disengage STL Backup Mode on the Matrix Rackmount, open the Aux connector so the unit will drop the call and not try to redial. Enter the H... -
Page 50: Idden Menu
Hidden Menu, or when a “Modem Flush” is performed. If you ever suspect that the Matrix has had one of these (unwanted) modes enabled, it may be valuable to issue a “Modem Flush”... -
Page 51: Odem Ountry Odes
Matrix Product Manual The Matrix’s modem can be user configured for operation in twenty differ- ODEM OUNTRY ODES ent countries. Once configured, the Matrix will remain in this setting until 00..N ORTH MERICA the country parameter is changed. Country configuration is confirmed after 01..A... -
Page 52: Lush Modem
“3” for N ENEG ETRAIN ETRAIN This is a way to reset the Matrix to factory default mode. It clears out the Ma- LUSH ODEM trix NV Ram, which deletes all configuration settings, including M entries. It’s like getting the Matrix new out of the box. To flush your... -
Page 53: Ial One
“2” to I EQUIRE GNORE The telephone line interface in the Matrix is via a V .34 (33.6 kb/s) modem. V .34 YMBOL is a very complex modem specification but in a nutshell, provides for negotia- tion, equalization and rate selection between compatible equipment. One of the parameters chosen during the negotiation phase is one of five possible carrier “symbol rates.”... -
Page 54: Ow To Upgrade The Matrix Control Processor
This file can be downloaded from the Comrex website or can also be emailed to you by our tech support staff. Note: Once the Flash memory in the Matrix is erased, you won’t be able to use the Matrix until the upgrade procedure is complete. Therefore, don’t go past step 6 below if you’re unsure of either your upgrade file or your... - Page 55 If these words don’t appear, try pressing the E key on the computer. NTER If you still don’t see the text, turn off the Matrix and recheck all connec- tions and settings. No change has been made to the Matrix firmware at this point.
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Page 56: Section 13........S Ome Operating Tips - (Stuff You Really Need To Know !)
When using analog modems, however (as in the Matrix), data is converted to analog tones which are sent through the telephone channel. These tones are much more likely to be affected by the limitations of the telephone channel. - Page 57 (See page 24-25 for further details on setting the MaxRate.) The Matrix has built-in error correction in the Voice Mode. Since the audio bandwidth in Voice Mode is limited to 7 kHz, we have been able to use the leftover data rate for error correction.
- Page 58 4. If there is call-waiting on your line, disable it by entering “*70” in front of the number you are dialing. 5. If possible, try the Matrix out at the remote site before your actual broad- cast, at about the same time of day that you plan to use it. This will give you a good idea of expected connect rates and possible line problems.
- Page 59 (See pages 27 & 57.) D. Refer to the “Modem Line Check List” in Appendix A. (See pages 72-76.) In our field tests with the Matrix, Vector, BlueBox and HotLine POTS codecs, SING ISTANCE we have seen a wide variety in the quality of connections, particularly in long...
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Page 60: Nternational Ac Power Cords And Telephone Connectors
One solution for international telephone connections — look for the fax machine. Fax machines provide direct line connections and use standard RJ11 modular jacks, so you can simply unplug the fax machine and plug into the Matrix. It may be necessary to change the modem country code (see below). -
Page 61: Omputer Modems Vs . Matrix Modem
Some users attempt to compare the connect rate message they receive when OMPUTER ODEMS VS using their computer modem to that which is produced by the Matrix. Often, ATRIX ODEM they find the Matrix message reports a dramatically lower connect rate than their computer. -
Page 62: Roubleshooting The
2) Have you checked your audio quality going into the Matrix? Often problems with noise or distortion in audio are added before the Matrix, but since the Matrix is the most mysterious link in the chain, it is assumed to fail first. - Page 63 The information contained on these pages is CRITICAL for successful use of a POTS Codec. If you call Comrex for support, we will likely attempt to connect to each of your Matrixes from our office. This way, by connecting from a known good line and carrier, we can often at least isolate which end of the connection is causing the difficulty.
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Page 64: Bout Ancillary Data
NCILLARY send low speed data along the same digital telephone channel used for the Matrix audio. The vital information you need to know is that this channel has the following parameters: 300 Baud; 8 bits; no parity; 1 stop bit Now, we will describe a few concepts: The Matrix ancillary data channel is asynchronous. - Page 65 Matrix. The Matrix will embed this character into the data it is sending, and the Matrix on the far end will extract this character from the incoming data. It will then send the character to the other computer com port, and it will appear on the other display.
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Page 66: Roubleshooting The
8) Type on your computer keyboard. You should see your characters echoed back to you on the screen. If this test is successful, you have sent data down the cable to the Matrix, into the encoder, looped through to the decoder and back to your computer screen. -
Page 67: Ortable
Matrix Product Manual ECTION PECIFICATIONS Connections ORTABLE Audio In: 3-pin XLR female (2) Tape In: ” 2-conductor mini-jack (1) Audio Out: 3-pin XLR male (1) Headphone Out: ” stereo phone jack (1) Tel Line & Tel Set: 6-pin RJ11C modular jacks (2) Contact Closures (Ready &... -
Page 68: Ackmount
Comrex Corporation Connections ACKMOUNT Audio In: 3-pin XLR female (1) Audio Out: 3-pin XLR male (1) Tel Line & Tel Set: 6-pin RJ11C modular jacks (2) Contact Closures “Ready” “CC” “AUX” “CC input”: ” 2-conductor mini-jacks (4) Multipurpose Port: 9-pin “D” type connector (1) -
Page 69: Inouts
Matrix Product Manual Tel Line: INOUTS Physical: RJ11C 6-pin Modular Jack Pin 3: Tip Pin 4: Ring Tel Set: Physical: RJ11C 6-pin Modular Jack Pin 3: Ring Pin 4: Tip Audio Inputs: Physical: 3-pin Female XLR Pin 1: Ground Pin 2: + Audio In... -
Page 70: Umpers
+8dBu. Moving these jumpers disables the ability to control levels via the Matrix menu. These jumpers are shown as J17 (input) and J18 (output). Factory default is for these jumpers to be in “normal”... -
Page 71: Equirements
1) This equipment complies with Part 68 of the FCC rules. On the bottom EQUIREMENTS of the Matrix is a label that contains, among other information, the FCC reg- istration number and ringer equivalence number (REN) for this equipment. The USOC jack required is an RJ11C. If requested, this information must be provided to the telephone company. - Page 72 You can eliminate small prob- lems with error correction (standard with the Matrix and selectable on the HotLine), but there is no time to fix large errors by re-sending data that was missed.
- Page 73 POTS codec into electronic key phone systems) can damage the modem or interface circuitry in your Matrix, you should try to weed out a bad unit. Make calls from each codec to our test number, using the same phone line, if possible.
- Page 74 Comrex Corporation make the call. If the line is clean, the trouble may be in your inside wiring. If the line is still noisy, the problem is either with the phone company or the phone wiring at the other end.
- Page 75 Matrix Product Manual If a repair person visits you, make the most of the situation. Don’t just send them to the closet at the end of the hall. Clean it out in advance so they can get in there without danger. Stay with them. Gently explain your problem.
- Page 76 Comrex Corporation There are two basic types of SLICs: integrated and nonintegrated. An integrated SLIC is connected by fiber-optic cable or copper wire to the telephone office. It is a high capacity digital device that is actually part of the phone company switching equipment.
- Page 77 At the remote end, this mix-minus feed is converted back to an “air monitor” by mixing in the local audio from the remote. This is easily done on the Matrix, with the O knob. UTPUT For radio stations, in addition to fixing the time delay problem, using a mix- minus feed has two other advantages.
- Page 78 Comrex Mix-Minus Bridge. This will allow you to expand one Program/Audition setup to handle five codecs or other remote audio devices. It also provides IFB (talkback) to remote sites. If you are using a Portable Matrix at the studio, check the O knob. If UTPUT this knob is turned counterclockwise, audio from the studio board will be sent back to the board, and funny effects will result.
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Page 79: Telcell Module
The modules connect to the base unit via a DB-25 connector. The fluid design of the Matrix with its ac- cessory slot and connector allows virtually infinite upgrade potential as new circuits become available. - Page 80 This module incorporates a GSM wire- less phone which is operated via the keypad of the Matrix. A new, enhanced voice algorithm boosts frequency response to 7 kHz on bit rates as low as 9600 baud.
- Page 81 This new control software is identified as Revision J for the HotLine and Revi- sion 7 for the Vector. If you will be using the Matrix with these codecs, you will get the best performance if their software is updated. Recent HotLine and Vector software shows its version on the screen: HotLine —...
- Page 82 Matrix or HotLine, it is possible to use the Matrix mixing facilities and Plain Telephone Mode to send program. Naturally, the program quality will not match the POTS codec quality.
- Page 83 Matrix Product Manual...
- Page 84 Comrex Corporation...
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