User's Manual
Table Of Contents
- 1.0 INTRODUCTION
- 2.0 MODEL NUMBER CODES
- 3.0 HARDWARE INSTALLATION AND BASIC INTERFACE REQUIREMENTS
- 4.0 INITIAL STARTUP AND CONFIGURATION
- 4.1 Introduction
- 4.2 STEP 1—Power up the LEDR Radios
- 4.3 STEP 2—Establish Communications with the Radio
- 4.4 STEP 3—Make Initial Login to Radio
- 4.5 STEP 4—Change the SUPER Password
- 4.6 STEP 5—Review Essential Operating Parameters
- 4.7 STEP 6—Set TCP/IP Settings to Enable SNMP and/or Telnet Management (if required)
- 4.8 STEP 7—Set User Configurable Fields
- 4.9 STEP 8—Verify Radio Performance
- 4.10 STEP 9—Install the Link
- 4.11 STEP 10—Verify the Link Performance
- 5.0 CONFIGURATION AND CONTROL VIA THE FRONT PANEL
- 6.0 CONFIGURATIONAND CONTROL VIA THE CONSOLE PORT
- 7.0 STANDARDIZING RADIO CONFIGURATIONS
- 8.0 UPGRADING LEDR FIRMWARE
- 9.0 USING ORDERWIRE
- 10.0 USING THE SERVICE CHANNEL
- 11.0 PROTECTED CONFIGURATION
- 12.0 SPACE DIVERSITY OPERATION
- 13.0 SPARE PARTS, UNITS AND ACCESSORIES
- 14.0 Fractional-T1 INTERFACE CARD 03-3846A01 Fractional-E1 INTERFACE CARD 03-3846A02
- 15.0 INCREASE BANDWIDTH BY CHANGING TRANSMITTER AND RECEIVER FILTERS
- 16.0 BENCH TESTING OF RADIOS
- 17.0 TECHNICAL REFERENCE
- 17.1 Specifications— Models: LEDR 400S, 700S, 900S and1400S
- 17.2 Specifications— Models: LEDR 400F, 900F, 1400F
- 17.3 Specifications— Protected Switch Chassis
- 17.4 Optional Equipment (Consult factory for detailed information)
- 17.5 Accessories
- 17.6 I/O Connector Pinout Information
- 17.7 Watts-dBm-Volts Conversion
- 18.0 RADIO EVENT CODES
- 19.0 IN CASE OF DIFFICULTY
MDS 05-3627A01, Rev. D LEDR Series I/O Guide 105
Receiver Failure
Both receivers are fed via an RF splitter from the antenna port. Each RF
path is buffered and monitored for receive signal integrity for uncorrect-
able bit-errors. If the “active” receive circuitry fails, uncorrectable
bit-errors will be detected. The modem receive switch will first deter-
mine that the “standby” receive path is operational (no uncorrectable bit
errors) and will switch accordingly.
11.3 Configuration Options—Warm or Hot Standby
The protected LEDR radio may be configured for either warm or hot
standby operation. In warm standby, the standby transmitter is powered
down. This offers the advantages of significantly reduced power con-
sumption, since only one transmitter path is powered. However, upon
transmitter failure, the switchover takes longer due to the transmitter
having to be powered up.
In a hot standby link, the standby transmitter is powered up at all times
and transmits into a dummy load. Switchover to active status is less than
50 milliseconds. The hot standby mode offers the advantages of faster
switchover time and increased overall system availability, but results in
higher power consumption for the station.
11.4 PSC Rear Panel Connectors
The following are descriptions of the rear panel connections of the Pro-
tected Switch Chassis. The PSC’s rear chassis is shown in Figure 22.
Figure 21 presents an inter-unit cabling diagram for protected configu-
rations.
Figure 22. Protected Switch Chassis—Rear Panel
RF CONNECTORS
530 (A&B)
Antenna
RxA
TxA
TxBRxB
530 (A&B)
E1
12
34
EIA-530-A Service ChannelEthernet
Protected (A+B)
A
B
External
RX TX
ETHERNET
E1/T1 DATA
PROTECTED DATA
EIA-530-A
SERVICE
CHANNEL