3021 1:1 IF Protection Switch
Dual Input Protection Switch
One output protected by two inputs (all connections 75 ohm); protection via remote or local control; 50-90 MHz bandwidth; no connectors in internal signal paths; 2 RU high; one 20 to 56 VDC and two 100 to 130 VAC power supplies; ultra linear; ultra reliable; often used for satellite up link protection
| Model 3021 Characteristics | |
| Channel Interfaces | |
| Dual Input Channels 1 and 2 Single Output Channel 75 Insertion Gain Variation: Operating Frequency Range: Amplitude vs Frequency Response: 70 MHz reference Input to Input Crosstalk: Input to Output Isolation: Switching Time: Random and Spurious Noise: Group Delay: |
Inputs and Outputs: 75Ω unbalanced Inputs and Outputs: > 26 dB return loss Input Power Level: -15 to +10 dBm Output Level: Unity gain relative to input < ±0.1 dB (70 MHz) 70 MHz ± 20 MHz +0.0 to – 0.3 dB, 50 MHz to 90 MHz, <-70 dBm on output, 0 dBm into other input > 80 dB, 0 dBm into unswitched input < 20 nsec < 80 dBm, all inputs terminated < 1.5 nsec, over 70 MHz ± 20 MHz |
| Channel Switching | |
| Either input can be switched to the output based upon external closure or serial signal Switch commands are B Failed (switch A to output), A Failed (switch B to output) Front panel toggle switch sets priority mode (channel on line with no switch command) Auto – Ch A Priority (revertive, output on input A with no standing switch command) Auto – No Priority (non-revertive, output on last input with no standing command) Two front panel toggle switches for manual override Channel A Online or Normal (no front panel selection) Channel B Online or Normal (no front panel selection) Remote Closure Inputs: Barrier Strip, #6 screws Activation on closure to ground (Active Low) or on closure open from ground (Active High) Active Low or Active High switching mode user selectable Switching command delay user selectable (High Speed: < 10 µsec, Low Speed: > 50 msec) One Serial I/O Input: 9 pin female D-Sub (DB9F) shielded, RS-422 Consult factory for current protocols |
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| Alarm and Status Outputs | |
| 9 pin female D-Sub (DB9F) shielded Individual closures indicative of Power Fail, Ch A on Output, Ch B on Output and Manual Mode All closures are normally open closures between isolated pins |
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| LED Indicators | Unit power OK, AC and DC Power Failure Indication of Manual Switch (Off Normal) |
| Power | |
| AC Power Consumption AC Input Power Range AC Power Connection DC Power Consumption DC Input Power Range DC Power Connection |
30 Watts 100 to 130 VAC, polarized 3 prong IEC 320, grounded, RFI filtered 10 Watts 20 to 56 VDC, floating Barrier Strip, two #6 screws |
| Environmental | |
| Operating Temperature Humidity Range Storage Temperature |
0 to +50° C 5% to 95%, Non-condensing -40 to +70° C |
| Physical Characteristics | |
| Shelf Size Rack Mounting Shelf Weight |
3.50” H (2 RU), 19” W, 14” D Flush with rack 9 pounds |
| Documentation | |