ExcelWave ECCS-450-470-50-4-4-1TB Customer's Manual
CUSTOMER MANUAL
ECCS-450-470-4-4-1TB
450-470MHz Compact Combining System, 4
Channels, 50W, Duplexed, Field Tunable
DECEMBER 12, 2018
WWW.EXCELWAVE.COM
1-888-329-2878(Tel) 1-888-318-5528(Fax)
CM-ECCS-U441TB
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sales@excelwavetechnologies.com www.excelwavetechnologies.com 1-888-329-2878(Tel) 1-888-318-5528(Fax) Rev.2
©All rights reserved, 2018
PRODUCT DESCRIPTION
ECCS-450-470-50-4-4-1TB field tunable compact combining system allow four transmitters and four
receivers operating in 450-470MHz share one Tx/Rx antenna.
• Built-in tunable duplexer accessible by removing the cover on the bottom of the chassis.
• Tune the duplexer without disconnecting the interconnection cables.
• Gain adjustment switches on the rear panel.
Major Tuning Parameters
Typical Tuning Range
Tx Band
Low Band
Rx Band
High Band
Tx-Rx End-End Separation, Non-tunable
5MHz
Tx Tuning Range
450-470MHz
Tx Pass Bandwidth, Non-tunable
2MHz
Rx Tuning Range
450-470MHz
Rx Pass Bandwidth, Non-tunable
2MHz
Warning Message:
• Attempt to tune and operate the unit beyond the tuning range specified in the
above table may damage the unit and violate the warranty.
• Please follow the instruction to connect the network analyzer and tune the
duplexer.
Electrical Specifications
Typical Tuning Target
Insertion Loss (maximum): Tx-ANT Ports
8.2dB (including duplexer insertion loss)
Isolation (minimum): Tx-Rx Ports
85dB
Isolation (minimum): Tx-Tx Ports
75dB
Isolation (minimum): ANT-Tx Ports
55dB
VSWR @ Tx/Rx Ports
1.25:1
VSWR @ Antenna Port
1.4:1
CM-ECCS-U441TB
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sales@excelwavetechnologies.com www.excelwavetechnologies.com 1-888-329-2878(Tel) 1-888-318-5528(Fax) Rev.2
©All rights reserved, 2018
TUNING INSTRUCTION
Tuning Tools
• L-shaped Tuning Socket Wrench (Supplied, as shown in the image)
• Screw Driver(Supplied)
• 2-Ports Vector Network Analyzer
(VNA)
Fig.1 Use of tuning screw driver and
wrench
Tuning Rods
3 different type of tuning rods are identified in Fig.2 with digital numbers, letters and combinations of the
two, and colored in blue, yellow and green respectively.
Fig.2 Duplexer Tuning Rods
• Tuning Rods identified by digital numbers 1-6 in blue: High band Rx band adjustment
• Tuning Rods identified by digital numbers 7-12 in blue: Low band Tx band adjustment
• Tuning Rods identified by letters A-E in Yellow: High band Rx bandwidth adjustment
• Tuning Rods identified by letters F-J in Yellow: Low band Tx bandwidth adjustment
• Tuning Rods identified by R1 and T1 in Green: Rejection (Tx/Rx isolation) adjustment
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