Specifications

MDS 05-3438A01, Rev. E MDS 4790/9790 Series I/O Guide 91
8.7 Cooling Fan Maintenance
The MDS 4790/9790 Series uses cooling fans to cool the main trans-
ceiver boards. To ensure that the fans operate correctly, inspect them on
a regular basis and keep them clear of dust (Figure 47).
Figure 47. Location of Cooling Fan
9.0 RADIO SOFTWARE UPGRADES
From time-to-time, Microwave Data Systems releases new software
code for its radio products. This code can be downloaded into existing
radios to take advantage of engineering improvements, or to change the
operation of a radio to a new modulation type.
For example, an MDS 4790B which is compatible with the MDS
4100/4310 family can be changed to an MDS 4790A to be compatible
with the newer generation of DSP-based radios by changing the soft-
ware and authorization code. Consult MDS Technical Support for
modem change information. If a radio is changed to a new modulation
type, it is recommended that a new Installation/Operation guide be
obtained from MDS that contains the appropriate command descrip-
tions.
9.1 Obtaining New Code
The latest software for each radio type may be downloaded free from
our Web site at:
http://www.microwavedata.com/downloads.asp
COOLING FAN
(Keep clear of dust)
AIR FLOW