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AC Specifications
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Standard
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Ohms
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PEAK OUTPUT
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RMS OUTPUT
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40mSec Pulse,
20% Duty Cycle
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5 Min,
100% Duty Cycle
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1 Hr,
100% Duty Cycle
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5 Min,
100% Duty Cycle
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1 Hr,
100% Duty Cycle
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Volts
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Amps
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Volts
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Amps
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Volts
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Amps
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Volts
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Amps
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Volts
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Amps
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Watts
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open
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200
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0
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200
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0
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200
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0
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141
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0
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141
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0
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0
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16
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195
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12
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195
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12
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195
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12
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138
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8
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138
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8
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1170
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8
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183
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23
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183
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23
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183
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23
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129
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16
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129
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16
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2104
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4
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165
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41
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165
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41
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165
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41
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117
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29
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117
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29
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3381
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2
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150
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75
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86
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43
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0
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0
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61
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30
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1848
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1.5
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134
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90
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1
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116
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105
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0.5
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66
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112
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Optional High-Current (HC) Version
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Ohms
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PEAK OUTPUT
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RMS OUTPUT
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|
40mSec Pulse,
20% Duty Cycle
|
5 Min,
100% Duty Cycle
|
1 Hr,
100% Duty Cycle
|
5 Min,
100% Duty Cycle
|
1 Hr,
100% Duty Cycle
|
|
Volts
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Amps
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Volts
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Amps
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Volts
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Amps
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Volts
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Amps
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Volts
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Amps
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Watts
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2
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55
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39
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55
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28
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55
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28
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39
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20
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39
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20
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770
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1
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51
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36
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51
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51
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48
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48
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36
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36
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34
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34
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1152
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0.5
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26
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52
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26
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52
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26
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52
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18
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37
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18
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37
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676
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AC Specification
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Frequency Response
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DC – 30 kHz, +0.1, –0.5 dB
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8 ohm Power Response
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DC-40 kHz
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± 180 Vpk
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DC-50 kHz
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± 150 Vpk
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DC-150 kHz
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± 50 Vpk
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DC-200 kHz
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± 25 Vpk
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Maximum Continuous Output Power
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3300 watts RMS
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Power Sinking
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1.2 kVA at 120VAC
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Slew Rate
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41 V/μSec
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Phase Response
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± 5 degrees (10 Hz - 10 kHz)
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Unit to Unit Phase Error
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+/- 0.1 degrees at 60Hz
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Output Offset:
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7548
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Less than 5 mV, field adjustable to less than 1 mV
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7548P
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Less than 200 μV
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Output Offset Current
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Less than 10 mill amperes DC
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DC Drift
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7548
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±1.5 mV
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7548P
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± 400 μV (from cold to maximum operating temperature); ±200 μV (after 20 minutes of operation)
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Residual Noise
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Unfiltered
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Less than 75 μV
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Filtered
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(400 Hz – 30 kHz): Less than 55 μV
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THD
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DC - 30 kHz less than 0.1%
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Input Characteristics
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Balanced with ground
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Three terminal barrier block connector 20 k ohm differential
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Unbalanced
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BNC connector, 10 k ohm single ended
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Gain
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Voltage Mode
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20 volts/volt
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Current Mode
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20 amperes/volt
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Max Input Voltage
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± 10 V balanced or unbalanced
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Input Impedance
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20 kOhm differential
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Input Sensitivity
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3.0V input for 3800W output into 1 ohm (adjustable)
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Common Mode Rejection Range
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± 11 VDC maximum
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Common Mode Rejection Ratio
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70 dB
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Display, Control, Status, I/O
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Front Panel LED Displays indicate
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Run, Ready, Standby, Stop, and Fault conditions in the output stage
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LCD Display
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Lists type of fault condition and gives suggested corrective action
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Soft Touch Switches for
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Run (Enable), Stop, Reset
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User Configurable
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LCD display can be configured for up to four simultaneous displays reporting one, two or all four of the following: Voltage Peak, Voltage RMS, Current Peak, and Current RMS
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Back Panel
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Power Connection
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NEMA-style locking receptacle; matching AC connector also included
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Signal Output
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4-position terminal barrier block
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Signal Input
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User-selectable Unbalanced BNC or Balanced Barrier Strip
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Interlock Connector
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25-pin D-sub connector used for amplifier control and status applications; also used in multi-amplifier applications
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Communication Capabilities
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Current Monitor
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± 1V / 20A ±1%
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Voltage Monitor
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± 1V / 1V ±1%
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Reporting
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System Fault, OverTemp, Over Voltage, Overload
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Control
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Force to Standby; Reset after a fault
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Protection
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Over/Under Voltage
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± 10% from specified supply voltage amplifier is forced to Standby
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Over Current
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Breaker protection on both main power and low voltage supplies
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Over Temperature
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Separate Output transistor, heat sink, and transformer temperature monitoring and protection
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Physical Characteristics
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Chassis
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Black powder-coat chassis with all aluminum construction; designed for stand-alone or rack-mounted operation. The amplifier occupies five EIA 19-inch-wide rack units
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Weight
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103 lbs. (46.7 kg)
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AC Power
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Three-phase, 208 VAC ±10%, 47-60 Hz, 20A AC service (400 VAC ±10%, 15A version available). A toggle switch circuit breaker opens all legs of the AC mains on excess current demand.
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Operating Temperature
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10°C to 50°C (50°F to 122°F), Maximum Output Power de-rated above 30°C (86°F)
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Humidity
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70% or less, non-condensing
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Cooling
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Forced air-cooling from front to back through removable filters via four 100 ft3/min. fans. No space is required between rack-mounted amplifiers. Air filters are removable from the rear via one fastener per side and may be eliminated if cabinet filtration is provided.
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Dimensions
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19 in. x 22.8 in. x 8.75 in. (48.3 cm x 57.9 cm x 22.3 cm). Unit occupies five EIA 19-inch-wide rack units.
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