Comtech EF Data SMS-301 - Manual (Page 20)

Introduction SMS-301 Redundancy Switch
1–6 Rev. 3
1.3 Specifications
Refer to Table 1-3 for the 1:1 switch specifications.
Table 1-3. 1:1 Switch Specifications
Data Interface Switch:
Modem A, I/O
Modem B, I/O
Common, I/O
Connector type: 25-pin D-sub,
37-pin D-sub
50-pin D-sub
100-pin D-sub
Control Bus Extender Card Connector Type: 37-pin D-sub (Remote Switch)
IF Uplink Switch: Connector type: BNC
Impedance: 75
Ω (50Ω optional)
Return loss: ≥ 18 dB
Switched input to output loss: < 1.5 dB
Frequency response: 50 to 180 MHz
IF input to input isolation: > 60 dB
IF Downlink Splitter: Connector type: BNC
Impedance: 75
Ω (50Ω optional)
Return loss: ≥ 18 dB
Splitter loss, input to outputs: < 4.0 dB
Output balance:
± 0.5 dB
Frequency response: 50 to 180 MHz
Local User Interface Front Panel:
•
Keypad: 6 button (enter, clear, left, right, up, down arrows)
•
Display: backlit LCD, 2 lines by 16 characters
Front Panel Status LEDs Operational mode:
•
Manual (Yellow)
• Automatic (Green)
Switch faults:
•
TX (Red)
•
RX (Red)
• System (Red)
•
Stored (Yellow)
On-line Status:
•
Modulator A (Green)
•
Modulator B (Green)
•
Demodulator A (Green)
• Demodulator B (Green)
On-line/Fault Status
Modulator On-line
Demodulator On-line
Switch Fault
Controller Fault
Spare Rear panel, 15-pin D-sub female
Form C relay
Form C relay
Form C relay
Form C relay
Form C relay
Remote Control Interface type: EIA-485/EIA-232 (local selectable)
Connector: 9-pin D-sub
Protocol: Addressable (see remote control protocol)