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A good user manual
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Unfortunately, only a few customers devote their time to read an instruction of Mark Levinson RS-232. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.
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First and foremost, an user manual of Mark Levinson RS-232 should contain:
- informations concerning technical data of Mark Levinson RS-232
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Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of Mark Levinson RS-232 alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of Mark Levinson RS-232, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Mark Levinson service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of Mark Levinson RS-232.
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Table of contents for the manual
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Page 1
1 No320S preamplifier RS-232 control guide[...]
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Page 2
2 Overview Overv iew The Mark Levinson No 320S pream plifier is equipped with an RS-23 2 control port. A com plete set of command in puts and stat us outputs a llow control of the No32 0S by an exter nal control s ystem (such as AMX or Crestron). T his guide contains connection d etails and t he RS-23 2 comm and list. Contacting Technical Support P[...]
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Page 3
3 Connection RS-232 Port Location RS-232 contr ol is throu gh an RJ-11 c onnector loc ated on the bac k of the No32 0S next to the IR outp ut. This c onnector has 6 pins of w hic h only thr ee are used f or comm unication. RS-232 Port Pin Configuration. The No320 S will rece ive control d ata on pin 2 D ata Receive and transm it status data on pin [...]
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Page 4
4 RS-232 Control Cable Madriga l Audio Labs offers s everal parts to help comm unicate via RS-232 to th e No320S. T he followin g parts can be order from Madrigal A udio Labs T echnical Support. Part # D escription MRC878 DS UB9 to RJ-11 A daptor and 2 m eter RJ-11 to RJ -11 Cable MRC808 DU B9 to RJ-11 Ada ptor MLC732 2 meter RJ-11 to RJ-11 Cable F[...]
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Page 5
5 D i a g r a m 2 – R J - 11 t o D S U B 9 C a b l e Pa r t s U se d f o r C a b l e D i g i ke y P a r t# R a d i os ha c k P a r t # (1 ) - 9 p in DSU B Fem ale Co nnecto r A2047-ND 2 76-1537 (2 ) - 6 pin RJ-11 Connector A9027-ND 2 79-421 (3 ) - 9 pin DSUB Housing A9001-ND 2 76-1539 (4 ) - 6 C onduc tor Da ta / P hone Ca ble H0063 (l ength in f[...]
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Page 6
6 Comma nd list Settings: 38.4K baud, 1 s top bit, no parity Format: !< command><cr> or ! Vxx.x<cr> Th e '!' is used as a framing char acter an d can be s ent any ti me to reset the packet recep tion code. N ote that al l commands are 5 bytes ( '!' + 3char co mmand + <cr > ) with the ex ception o f the di[...]
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Page 7
7 GI2 Go to input 2 GI3 Go to input 3 GI4 Go to input 4 GI5 Go to input 5 GI6 Go to input 6 GI7 Go to input 7 Note: “ GI7 ” selects either input 7 or phono i nput if inst alled. GBA Go to balance mode GBE Exit balance mode IOF Go to display inte nsity 0 I25 Go to display inte nsity 25% I50 Go to display inte nsity 50% IFU Go to display intensit[...]
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Page 8
8 Status Update: Any change in the following 6 control keys will automatically send out the correspondi ng ASCII stri ng. CONTROL KEY RETURNED VALUE COMMENT Select k nob 1:IN:<1 -7>:<input alias><cr> or 1:IN:NONE <cr> if no c urrent valid input selecti on input ali as> is m ax 7 chars, no null term ination input ali as = [...]