LD-5S and LRC1 Series

Line Driver Amplifiers (LDAs) are specially designed for use in satellite earth stations and general purpose telecommunications applications. Utilizing proven GaAs FET technology, these amplifiers have been designed for reliable operation in both fixed and transportable applications.

Product Details

Features

LD-5S series C-Band Line Driver Amplifiers (LDAs) are specially designed for use in satellite earth stations and general purpose telecommunications applications. Utilizing proven GaAs FET technology, these amplifiers have been designed for reliable operation in both fixed and transportable applications.

  • GaAs FET design
  • Internal regulator
  • Reverse polarity protection
  • Input/output isolators
  • High reliability
  • SMA (F) connectors

Options

  • 22, 32, or 42 dB minimum gain
  • +20 or +25 dBm min. output power at P1 dB
  • Transmit or receive frequency bands

Specifications

Parameter

Notes

Min.

Nom./Typ.(+)

Max.

Units

Frequency Band "C"
Band "D"
Band "M"
Band "R"
3.60
3.40
5.85
5.85
4.20
4.20
6.425
6.725
GHz
GHz
GHz
GHz
Gain “-5S22x”
“-5S32x”
“-5S42x”
22
32
42
25
35
45
dB
dB
dB
Gain Flatness Full Band
Per 40 MHz
±0.5
±0.2 
dB
dB
Noise Figure 2.7 3.5 dB
Power Output at 1 dB compression “-5Sxx2” (Standard)
“-5Sxx3” (High Power)
+20
+25
+21
+26
dBm
dBm
Third Order Output Intercept Point “-5Sxx2” (Standard)
“-5Sxx3” (High Power)
+30
+35
+31
+36
dBm
dBm
Group Delay per 40 MHz Linear
Parabolic
Ripple
0.03
0.003
1.0
ns/MHz
ns/MHz2
ns p-p
VSWR Input
Output
1.25
1.25
1.35
1.35
dBm
dBm
Maximum Input Power Damage threshold +10 dBm
Connectors Input/Output
Power


SMA Female
RFI Filter Soldier Terminal
Power Requirements Voltage
Current (Standard)
Current (High Power)
+11


+12
200
300
+16
250
350
Vdc
mA
mA
Temperature Range Operating; case 0 +60 °C

Features

Redundant Line Driver Amplifier (LDA) systems minimize system downtime due to LDA failure by providing a spare LDA and an automatic means of switching to the spare upon failure of the primary LDA. A 1:1 system provides one spare LDA for one primary LDA. A 1:2 system provides one spare LDA for either of the two primary LDAs.

Used to overcome cable losses, the systems are designed for installation at satellite earth stations in standard 19-inch EIA equipment racks. The systems are designed to house LD-5S Series C-Band LDAs.

  • Standard 19” rack panel, 3.5” high
  • Dual redundant power supplies
  • Worldwide AC input capability
  • Amplifier bias current monitoring to detect faults
  • Manual or automatic operation
  • Manual override switch control on rear panel
  • Serial I/O
  • Offline I/O with isolators
  • Cooling fan
  • Gain matching of amplifiers to ±1 dB

Options

  • Variable attenuators located either at the output of each LDA or at each system path output

Operating Modes

  • Automatic Mode: In Automatic mode, if a failure is detected in an online amplifier, the standby amplifier is switched on line. Typical switchover time is 100 milliseconds. For 1:2 systems, in the case that both on-line amplifiers fail, priority is selectable to either Pol 1 or Pol 2. For either 1:1 or 1:2 systems, the unit will not automatically switch to a defective amplifier.
  • Manual Mode: The amplifiers can also be manually switched from the front panel or remotely. In Manual mode, automatic switching will not occur upon fault detection, although the monitor and alarm circuits still function.

Local or Remote Control

The systems include provision for remote status monitoring and operation. Typical uses are for sending status information to a centralized monitor and control system or for remotely controlling the system from a nearby building. All Local front panel features can be remotely controlled and monitored, except for the Remote/Local switch. In Remote mode, the front panel controls are inoperative, but the indicators continue to reflect the current operating state of the system. Remote status outputs are Form ‘C’ dry relay contacts capable of switching up to 100 Vdc at 100 mA. Remote control inputs are opto-isolator coupled for noise and common mode ground loop rejection.

Specifications

Parameter

Notes

Min.

Nom./Typ.(+)

Max.

Units

Frequency Band "C"
Band "D"
Band "M"
Band "R"
3.60
3.40
5.85
5.85
4.20
4.20
6.425
6.725
GHz
GHz
GHz
GHz
System Gain LDx-5S22x amplifiers
LDx-5S32x amplifiers
LDx-5S42x amplifiers
20
30
40
23
33
43
dB
dB
dB
Gain Flatness Full Band
With attenuators (Option)
±0.5
±1.5              
dB
dB
Gain Slope Per 40 MHz
With attenuators (Option)
    ±0.2
±0.3 
dB
dB
Gain Match Between LDAs     1 dB
Noise Figure At +23 °C 3.5 5.0 dB
Power Output at 1 dB compression LDx-5Sxx2 amplifiers
LDx-5Sxx3 amplifiers
+18
+23
+20
+25
dBm
dBm
Third Order Output Intercept Point LDx-5Sxx2 amplifiers
LDx-5Sxx3 amplifiers
+28
+33
+30
+35
dBm
dBm
Group Delay per 40 MHz Linear
Parabolic
Ripple
0.03
0.003
1.0
ns/MHz
ns/MHz2
ns p-p
VSWR Input (50 ohms)
Output (50 ohms)
1.20
1.20
1.25
1.25
:1
:1
Maximum Input Power Damage threshold +10 dBm
Connectors RF Input/Output
Remote Input
Alarm Output
Serial I/O (RS-232/-422/-485)


Type N Female (50 ohms)
9-pin D Male
37-pin D Male
9-pin D Female
Operating Modes      Manual or Automatic    
Alarm Output Form 'C' contacts   100 Vdc / 100 mA    
Remote Inputs Control inputs   Contact closure to ground; withstand 5 V, sink 5 mA    
Power Requirements Voltage (autoranging)
Frequency
Power

47

90–135 or 175–264

50

63

Vac
Hz
W
Size     19 x 3.5 x 24
483 x 89 x 610
  inches
mm
Temperature Range Operating 0 +50 °C

C-Band Single Thread Outline Drawing

Satcom - C-Band Single Thread Line Driver Amplifiers (LDA) Outline Drawings

C-Band Redundant Block Diagrams

Satcom - C-Band Redundant Line Driver Amplifiers (LDA) Block Diagrams