Operation M7/M7L/M7LT Modular Satellite Modem1-8 M7/M7L/M7LT - Rev. 0.051.3. What’s New – This Modem and This ManualThe M7 is similar in operation to the previous Datum Systems modems, especially the PSM-4900 orPSM-500 series. However, there are a number of significant changes in this modem series whencompared to the previous releases. The list below shows some of the differences between the M7series and the previous Datum Systems modem products.1.3.1. New to the M7: The base M7 series is only a single half-rack width (Figure 1-1). Consequently everything isslightly smaller except the new LCD display which provides more information including soft keys. A standard 1 RU 19” rack mounted front panel plate allows mounting of one (Figure 1-5) or two(Figure 1-1) M7 modems side-by-side.Figure 1-5 – M7 Modem (shown in 1RU shelf configuration) The 10/100 BaseT Ethernet interface on the rear panel now includes firmware updates, SNMPremote control and a Web Browser based user interface. In the M7 this interface is separate fromany IP data interface option. An RS-232 remote control interface is also provided similar to previous modems for binary packetcontrol. Each M7 series version is capable of many software upgradeable “Feature Sets”, as described insection 1.7. Many features of the modem are field upgradeable without adding new hardware. The M7 modems contain two slots for IF boards. These can include any combination of modulatorand demodulator. This means the M7 is capable of being a modem, a TX only modulator, RX onlydemodulator, a dual modulator, or dual demodulator. There are two interface option slots in the chassis. There are currently two interface optionscovering 3 interface types: standard Synchronous Serial, Vyatta PC based IP interface/router,HSSI and a G.703/E1 Full and Fractional (Drop and Insert) interface either with or without the IPinterface. Multiple interface configurations are possible within the two interface slots. Pleaseconsult factory. There is an option connector on the demodulator PCB used to add TPC FEC options. Themodulator is capable of all FEC options without additional hardware The M7 is powered by 8 to 36 VDC input. In a standard shipment, Datum supplies an externalpower adapter module that converts 100 to 240 VAC to IPB at 24VDC. The M7 series is available in an L-Band terminal configuration in a 1RU configuration. Thisconfiguration is the M7LT model (Figure 1-6) which provides 10MHz reference and DC powerthrough the interfacility cable to the Block Up Converter (BUC) and Low Noise Down Converter(LNB).
