OPERATORS MANUAL NM 84 NETWORK PREAMPLIFIER Quick Start Why is it that the hardest thing about writing the Quick Start is the opening line? What I want to say is, First, design the network. Only thats hard to say with a straight face but if you are going to jump right into this thing without reading all of our hard work, then thats where you begin. By designing a network. Okay, that works...lets move on.
Front Panel Description a Mic Input Meters should be self-explanatory. They are meters with an averaging logarithmic filter. The only quirk to these meters is the Mute condition when only the Limit indicator and no others is illuminated. b Edit buttons c LCD Display d DATA wheel are provide a quick and convenient way to get to the Edit page for the individual Mic Inputs. which displays Edit Pages. .
Rear Panel Description a Chassis ground screw . A #6-32 screw is supplied for chassis grounding purposes. The NM 84 does connect the 3rd pin of the AC line cord to the NM 84 chassis metal through the RS 3 power supply. This chassis screw is supplied should you need a point in the rack to earth ground other devices or the metal rack rails. The earth connection is critical and in most installations, required by law. Please refer to the RaneNote, Sound System Interconnection (available at www.rane.
NM 84 LCD Edit Pages Each Edit page name appears in the upper left corner of the LCD display. Seventeen (17) pages are found: 8 pages for Inputs, named IN 1 through IN 8 (one page for each of the Mic Inputs) 4 pages for Monitor Outs, named Monitor 1 through Monitor 4 (one page for each Monitor Out) 2 pages for Network Transmit, (NetTx A/B and NetTx C/D) for selecting 20- or 24-bit Format audio transmission over the network and to select which of four CobraNet Bundle(s) to transmit onto.
Monitor Out Edit Pages Monitor 1 through Monitor 4 Network Transmit (NetTx) Edit pages The four Monitor Out Edit pages set up the four Monitor The NM 84s eight Mic Input audio channels can be Outputs. Two modes are possible for each Monitor Out: Local transmitted on up to four different CobraNet Bundles.
Memory Edit page Parameter Range Store Integers 1 through 16 Memories. Memory Recall Port Transmit (MRP Tx) and MRP Recall Integers 1 through 16 Receive (MRP Rx) are also set in this page. MRP Tx (MRP transmit) Off, integers 1 through 16 The Memory Edit page stores and recalls the 16 NM 84 Conceptually, the NM 84 contains 17 Memories; Memory MRP Rx (MRP Receive) Local, Off, integers 1 through 16 zero contains the current settings which are always displayed on the LCD screen.
Configuration Edit page The Config page sets the NM 84s IP address and Name. Set the IP Address to 0.0.0.0 to enable CobraNets Discovery that the IP address displayed in the NM 84 screen will not be updated to reflect the IP Address assigned by Disco (see the Quick Start on page Manual-1). Utility to dynamically assign the IP address. To assign an IP Address using the NM 84 front panel, edit matches the numbers assigned by your network administratorif you have one.
7) Signal Level Meter The Mic Input Meters monitor the signal at the output Extra credit reading: of In addition to protection of equip- ment and control of SPL, the NM 84s Limiters may be used the voltage controlled amplifier (VCA). Therefore, the for AGC. To provide AGC, set the Limiter (Lim) to a level Meter indicates the signal level after the Trim and any gain about 10 to 15 dB below your required operating level and reduction due to Limiter operation.
Bundle number 0 (Off) Designation Null (hex: $0001 through $00FF) Advantages Transmission disabled. Unused channel, i.e., Off. (hex: $00) 1 through 255 Description Multicast Bundle Multicast. All CobraNet devices can transmit & receive data through Multicast Bundles. Disadvantages Perfect for muting audio and saving Muted audio never arrives network bandwidth. at any destination and is nearly impossible to hear.
Network Hardware Device Advantages Repeater hubs Operate half duplex; i.e., they cannot transmit & receive simultaneously. Thus, a 100 Mbit network is 100 Mbit network-wide. Very inexpensive (but likely going away). Perfect when a dedicated CobraNet network is needed and all audio data is required at all CobraNet nodes. As switches are added to a network, the network's bandwidth increases. Some Switches (unmanaged) switches provide fault tolerance features (i.e.
for listeners in the initial, center seats may not find this delay acceptable. Assuming that no propagation delay is added through other digital signal processing or a digital console (this may be the case), the additional network delay of 6.5175 feet assuming NM 84s on and off the network may place the arrival time of the direct sound versus the acoustic arrival outside the Haas effect time. This would make the propagation delay unacceptable for this application.
Network Examples audio dropouts, pops or ticks. Not fun, or necessary. There are two ways to transmit CobraNet audio across a network. An example for each transmission method follows. The application dictates which of the two methods to use. Oftentimes however, computer data must be shared on the network or not all audio channels are required at every node. This is where unicast networking comes in. Unicast Network example [a.k.a. point-to-point] Multicast Network example [a.k.a.
Software and Applications ActiveX and Software issues Microsoft ActiveX controls (defined in the next section) are of concern to the pro audio community. This technology allows designers of computer-controlled sound systems to create common front-end software control panels that operate different manufacturers units, without having to know anything about their internal code or algorithms. This is powerful.
NM 84 ActiveX Example To track slider or system changes and update either the The short version of the FrontPage 2000 procedure used to setup a web page with ActiveX controls for a Rane NM 84 devices parameters goes as follows: web page, the NM 84 device, or both, well need to use Microsofts Visual Basic Script language. This is where the programming comes in. Yes, it does say Insert a Rane NM 84 ActiveX control in a new web page. programming .
Computer IP Setup times as they appear to extinguish all the network setup If youre using a computer with the NM 84, it must be set for network operation to allow it to speak using TCP/IP protocol. (TCP stands for Transmission Control Protocol.) If your computer is already set up for network operation you can move on in your life and skip this section.
Conductor The CobraNet device on the network which Multicast addressing Data which is Multicast is addressed supplies the master clock. A conductor arbitration proce- to a group of, or all devices on a network. All devices dure insures that at any time there is one, and only one, receive multicast addressed data and decide individually conductor per network. The conductor transmits beat whether the data is relevant to them. A Switched Hub is packets at a regular interval.
Memory Recall Port 1 2 3 4 5 6 7 8 1 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 2 0 0 1 0 0 0 0 0 3 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 6 0 0 0 0 0 0 1 0 7 0 0 0 0 0 0 0 1 8 0 0 0 0 0 1 1 1 1 1 0 0 0 0 1 1 1 2 0 1 0 0 0 1 1 1 3 1 1 0 0 0 1 1 1 4 0 0 1 0 0 1 1 1 1 0 1 0 0 1 1 1 0 0 0 1 0 1 1 1 7 1 0 0 1 0 1 1 1 8 0 0 0 0 1 1 1 1 9 1 0 0 0 1 1 1
Control Name: Rane Corporation NM 84 SNMP Active X Control Description: SNMP Control of a NM 84 Design Time Parameters: IP Address Update Freq NM 84s Device Address How often (in 100ms steps) the NM 84s status is checked Runtime Parameters: condPriority Conductor Online Conductor Priority ( 0 = Never Conductor, 32 = Default ) (Read Only) return TRUE if the NM 84 is currently the conductor (Read Only) returns TRUE if the NM 84 is currently operational : for Idx 0->7 corresponds to Input 1-8 Mic_Mute(Id
Mic5_Filter Mic5_Limiter Equates to Mic_Filter(4) Equates to Mic_Limiter(4) Mic6_Mute Mic6_Phantom_Power Mic6_Line_Mode Mic6_Mic_Gain Mic6_Line_Gain Mic6_Trim Mic6_Filter Mic6_Limiter Equates to Mic_Mute(5) Equates to Mic_Phantom_Power(5) Equates to Mic_Line_Mode(5) Equates to Mic_Gain(5) Equates to Mic_Line_Gain(5) Equates to Mic_Trim(5) Equates to Mic_Filter(5) Equates to Mic_Limiter(5) Mic7_Mute Mic7_Phantom_Power Mic7_Line_Mode Mic7_Mic_Gain Mic7_Line_Gain Mic7_Trim Mic7_Filter Mic7_Limiter Equates
