MDS 05-3628A01, Rev. B
MDS 4790M (MPT 1411) I/O Guide
iii
RXPAD [ON/OFF] ............................................................................. 40
RXTOT [NONE, 1-1440] ................................................................... 40
SCD [0-255] ...................................................................................... 40
SER .................................................................................................. 40
SHOW [DC/PWR/CURRENT/RADIO] .............................................. 40
SNR, SNR! ....................................................................................... 41
SREV ................................................................................................ 41
STAT ................................................................................................. 41
TEMP................................................................................................ 42
TIME [hh:mm:ss] .............................................................................. 43
TOT [ON/OFF, 1-255] ....................................................................... 43
TX [xxxx] ........................................................................................... 43
TXGAIN [ON/OFF]............................................................................ 44
TXLEVEL [–20 to +3, AUTO]............................................................ 44
UNIT [10000–65000] ........................................................................ 44
6.4 Configuration and Programming using the Front Panel ................. 44
Programming and Control Buttons ................................................... 47
Navigating Through the Front Panel Screens .................................. 47
Switching the Front Panel Display to Configuration Mode ............... 48
Use of Control Buttons in Configuration Mode ................................. 48
Making Changes to Radio Functions................................................ 48
6.5 Screen Descriptions ....................................................................... 49
Group 1—Startup Screen and Menu Directory (page 53)................. 49
Group 2—Configuration Screens (page 53) ..................................... 49
Group 3—Diagnostic Screens (page 61).......................................... 49
Group 4—Event Log (page 62) ........................................................ 50
7.0 LOCAL & NETWORK-WIDE PROBLEM SOLVING .................. 63
7.1 Local Problem-Solving ................................................................... 63
Problem-Solving with LED Indicators ............................................... 63
Problem-Solving Using a Connected PC.......................................... 64
Problem-Solving Using the Front Panel Display............................... 64
System Bench Testing Set-up .......................................................... 65
7.2 Performing Network-Wide Radio Diagnostics ................................ 65
7.3 Replacing Assemblies .................................................................... 67
Transceiver Board and Power Supply Assemblies........................... 67
Front Panel ....................................................................................... 68
Internal Duplexer .............................................................................. 68
Antenna Switch Module .................................................................... 70
7.4 Cooling Fan Maintenance ............................................................. 71
8.0 TECHNICAL REFERENCE ....................................................... 72
8.1 Technical Specifications .......................................................... 72
8.2 RF Propagation Planning ............................................................... 74
Fresnel Zone Clearance ................................................................... 74
Earth Curvature ................................................................................ 75
Fade Margins.................................................................................... 75
Calculating Path Loss ....................................................................... 75
8.3 Formulas for System Planning ....................................................... 76
Free Space Path Loss ...................................................................... 76
