Marantz Receiver Commands

TurnipTruck

Greetings,

I am pre-programming for a Marantz receiver that I do not have here for testing. The commands seem to be quite uniform across most models so I'm hoping someone may have first-experience with this protocol.

All of the commands are followed with what the manual refers to as "/r" before the delimiter.

For example, the command for audio mute is:

@AMT:1/r

What does the /r refer to?

Thanks.

vining

Some lanuages use that to signify carriage return so that would be my guess. If I recall line feed is /n.

John Nagy

TurnipTruck wrote: »

All of the commands are followed with what the manual refers to as "/r" before the delimiter.

For example, the command for audio mute is:

@AMT:1/r

What does the /r refer to?

My doc and our command file show that to be a hex 0D, a return. Our command for MUTE OFF is

@AMT:1
followed by a $0D which is hex RETURN. So you don't code the / or an r, just a return instead of /r

By the way, MUTE ON is @AMT:2
This is the old Marantz protocol. the new units use the DENON protocol:
Mute is
MUON [return]
MUOFF [return]
for example.

Also found today that the newer MARANTZ and MACINTOSH BluRay players also share a protocol. World is getting smaller.

PhreaK

Usage of the forward slash I'd guess is just a typo in the protocol. A lot of C family languages use a back slash as an escape character followed by another character (or characters for unicode) to create an escape sequence. Here's some of the common ones's you might come across: Code Codex - Escape sequences and escape characters.

ericmedley

I've done tons of Marantz and yes, the commands are terminated with a $0D.

One thing to note too. Marantz has (annoyingly) put a Green[\I][\I] feature that can really horse up a control system. Basically the power is OFF and the unit will not respond to ANY RS232 commands until you physically power it up from the front panel button. You have to send a couple commands to the unit to disable this feature. (I'm sitting in O Hare right now and don't have the commands handy. sorry). After sending the command the unit will work normally. That is until it looses wall power and resets itself back to factory.

I just send the commands to the unit at each power up and down command. The clients know to manually hit the power if the unit doesn't fire up and power the system down and up again to get it all happy.

shr00m-dew

Got caught by something similar on the pioneer's. Their port goes to sleep after a few hours. The first command you send it just wakes up the port for a few seconds. So to guarantee it comes on, you have to send two power on commands in a row.

Kevin D.

TurnipTruck

Thanks guys. I realize that there is a $0D for a delimiter. However, I am thinking that the /r before the delimiter reference has something to do with the room because the commands listed for zones 2 and 3 seem to be the same.

For example, Multi-zone A (zone 2) and Multi-zone B (zone three) both show @MPW:1 as their power off command.

Thanks.

TurnipTruck

Now that I take a closer look zone two uses @MPW:1 where zone three uses @MPW=1. Devil is in the details.

I'll assume that the /r is just a reference to the needed CR.

Thanks.