User's Manual

260-668066-003 Rev 001 August 2010 3-9
Eclipse Installation Manual
Eclipse IRU 600
The IRU 600 is a 3RU rack-mounted transceiver unit for co-location with an INU/
INUe as an all-indoor installation.
IRU 600 is 1+1 optimized with provision for two RFUs (Radio Frequency Unit) and a
companion filter-based ACU (Antenna Coupler Unit).
High power and standard power RFUs are available. Both are highly energy efficient.
(50W power consumption for standard power, 98W for high power).
Transmit power output is limited (applies on the high power RFU) to a maximum of 1W
(30dBm) at the antenna port to comply with the conducted power limit in FCC CFR 47,
Part 15.247.
• Standard power RFUs are powered over the IF cable from its INU/INUe.
• High power RFUs are additionally powered using a separate DC input on the RFU
front panel.
• The power connector (D-Sub M/F 2W2) and cable is identical to that used for the
INU.
• The high power RFU provides a wide-mouth connection for +/- 21 to 60 Vdc. Both
+ve and -ve pins are isolated from ground.
• An integral DC/DC converter provides polarity protection, under/over voltage
shutdown, over-current limit, and thermal shutdown.
• NEBS compliant EMI filtering is included.
There are no serviceable fuses.
The ACU design supports paired and unpaired Tx/Rx frequency splits and incorporates
an optional expansion port to allow other radio links onto its waveguide feed for
co-path operation.
The IRU 600 also supports 1+0 repeater (back-to-back) operation. The links may be in
the same or different bands.
Protected/diversity options include:
• 1+1 hot-standby, single antenna, with equal or unequal split.
• 1+0 hot-standby-ready.
•Space diversity (dual antennas) with common or split Tx.
Figure 3-20. Low Power IRU 600