| Model 3031 Characteristics |
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| Channel Interfaces | |
Dual Input Channels 1 and 2
Lineup Tone Input
Single Output Channel
75 BNC Jack (female center pin), all channels
Channel 1 Minimum Gain:
Channel 1 Maximum Gain: | Inputs and Outputs: 75 unbalanced
Inputs and Outputs: > 26 dB return loss
Operating Frequency Range: 70 MHz ± 20 MHz
Minimum Power Input: -20 dBm
Maximum Power Output: +10 dBm
0 dB ± 0.1 dB
20 dB +1.0, -0.1 dB |
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Channel 1 gain is based upon satellite beacon receiver voltage. Voltage to gain relationship user defined.
This Uplink Power Control feature can be disabled making Channel 1 fixed unity gain the same as Channel 2.
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Channel 2 Gain (fixed):
Amplitude vs Frequency Response:
Inband Noise, Output 1:
Inband Noise, Output 2:
Three Tone Intermodulation:
Spurious Signal Amplitude Modulation:
Group Delay:
| 0 dB ± 0.1 dB
+0.0 to -0.3 dB, 50 MHz to 90 MHz,
70 MHz reference
<-60 dBm, channel gain at maximum
<-70 dBm, channel gain at unity
<-55 dB relative to single tone power ( +8 dBm)
<0.1% peak to peak ( –60 db relative to signal power)
< 1.5 nsec, over 70 MHz ± 20 MHz |
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| Channel Switching | |
Either input can be switched to the output based upon loss of input or output power, external closure or serial signal
Switch commands are B Fail (switch A to output), A Fail (switch B to output) or IF Lineup Tone (lineup tone to output)
Front panel toggle switch sets priority mode (channel on line with no switch command)
A Priority (revertive, output on input A with no standing switch command)
No Priority (non-revertive, output on last input with no standing command)
Front panel three position toggle switch for manual override
Force A (switch A input to output)
Force B (switch B input to output)
Auto Mode (allow normal switching modes)
Control Inputs:
Barrier Strip, #6 screws
Control Inputs:
A Fail (switch B input to output)
B Fail (switch A input to output)
IF Lineup Tone (switch Lineup Tone to output)
High Temp (ramp Channel A gain down to unity and then switch Channel B to output)
Beacon Voltage (satellite receiver beacon voltage, 0 to 10 volts, used for Channel A gain control)
Control activation based on external closure between two identified screws (provides internal closure to ground)
Switching speed: <5 milliseconds for external command, <100 milliseconds for internal detection and switching
TBOS Serial I/O:
9 pin female D-Sub (DB9F) shielded
TBOS, RS-422 (daisy-chainable two pair RS-485) |
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| LED Indicators | |
Unit power OK, AC1 and AC2 Power Failure, Unit Fail, IF Out Fail, Switch Off Normal
A and B Line, A and B Fail, Lineup Tone, Beacon High and Fail, UPC High Temp and Time Out
Uplink Power Control (UPC) Active, Bargraph Gain Indication from 0 to 15 dB or Maximum Gain |
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AC Power Consumption
AC Input Power Range
AC Power Connection | 30 Watts
100 to 130 VAC, polarized
3 prong IEC 320, grounded, RFI filtered |
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| Physical Characteristics | |
Shelf Size
Rack Mounting
Shelf Weight | 3.50” H (2 RU), 19” W, 14” D
Flush with rack
9 pounds |
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Uplink Power Control (UPC)
