Comtech EF Data CRS-300 - Manual (Page 45)

CRS-300 1:10 Redundancy Switch MN/CRS300.IOM
Introduction Revision 19
1–19
1.5.3 CRS-280 and CRS-280L IF Switch Specifications
Characteristic
Requirement
CRS-280 (70/140MHz) CRS-280L (L-Band)
Tx/Rx Operating Freq 50 to 180 MHz 950 to 1950 MHz
Tx / Rx Connectors BNC female N-Type female (50Ω)
Return Loss
18 dB return loss into 75Ω
(50Ω optional)
15 dB return loss into 50Ω
Transmit IF Loss/Flatness
• Tx In To Tx Uplink Out
• BU In To Any Uplink Out
< 1.5 dB over operating freq
< 1.5 dB over operating freq
< 0.8 dB/0.5 dB over operating freq
< 2.5 dB/1.0 dB over operating freq
Receive IF Loss/Flatness
• Rx Downlink In To Rx Out
• Any Downlink In To BU Out
< 5 dB over operating freq
< 5 dB over operating freq
< 4.0 dB/0.5 dB over operating freq
< 5.5 dB/1.0 dB over operating freq
Tx to Tx Channel Isolation > 50 dB > 70 dB
Rx to Rx Channel Isolation > 50 dB > 70 dB
Tx to Rx Channel Isolation > 60 dB > 90 dB
Powering of IF Switch From the CRS-300 chassis 100 to 240 VAC 50/60 Hz (25W)
Power Supply 90-264 VAC, 50/60 Hz (25 W) 90-264 VAC
Fuse
Dimensional Envelope
(Rack Mount 4RU)
19W x 2.5D x 7H inches (48.26W x 6.35 x 18H cm)
Weight < 10 lbs (< 4.54 kg) < 25 lbs (11.3 kg)
1.5.4 CRS-350 ESC Switch Specifications
Characteristic Requirement
User Data Interfaces (1) DB-25M Connector – ESC, overhead signals
(1) DB-15F Connector – IDR Alarms
(1) DB-9F Connector – Audio
Power From CRS-300
Dimensional Envelope
(Rack Mount 4U) 19W x 4.0D x 7H inches
(48.26W x 27.5D x 18H cm)
Weight 5 lbs (2.2 kg)