122
LEDR Series I/O Guide
MDS 05-3627A01, Rev. D
15.3 Software Commands
To activate the new filter bandwidth, it is necessary to enter an authori-
zation key provided by Microwave Data Systems. This key is based
upon the radio serial number and will authorize the new bandwidth of
the radio. Contact the factory if you do not already have an authorization
number.
1. Initiate a NMS terminal session with the LEDR radio. (Refer to
2. At the
LEDR>
prompt, type:
auth add <authorization number>
, where
<authorization number>
is the number provided to you by the factory.
Press
ENTER
.
3. This completes the required software changes. If desired, the
auth
show
command may be entered to display all of the current options
for the LEDR radio.
4. Check for alarms on the front panel LED display. If no alarms are
present, the basic functionality of the radio can be confirmed. If an
alarm is present, double check all cable connections and radio set-
tings.
16.0 BENCH TESTING OF RADIOS
In some cases, it may be necessary to test the operation of the equipment
in a bench setting.
shows a simple arrangement for bench
testing using RF attenuators between the two units under test.
For weak signal tests (weaker than –80 dBm), additional physical sepa-
ration between Radio 1 and Radio 2 may be required to prevent uninten-
tional coupling between the radios.
On protected radio configurations, a weak received signal will cause the
radio transceivers to switch.
Figure 31. Back-to-Back Link Test
ANT
Connector
ANT
Connector
POWER ATTENUATOR
• 30 dB
• 1W Rating
POWER ATTENUATOR
• 30 dB
• 1W Rating
SWITCHED OR VARIABLE
ATTENUATOR
• 0–110 dB (1 dB Steps)
JFW 50DR-001 or Equivalent
• Required only for receiver sensitivity test.
LOW LOSS COAXIAL LINES
DIGITAL
EQUIPMENT
OR BER
TESTER
RADIO
#1
DATA PORT
TOTAL ATTENUATION
Fixed: 80 dB Minimum for Basic Checks
Adjustable: For Sensitivity Tests (100–140 dB Required)
DIGITAL
EQUIPMENT
OR BER
TESTER
DATA PORT
RADIO
#2
