| AC Specification |
| Frequency Response |
DC - 30 kHz, +0.1, -0.5 dB |
| 8 ohm Power Response |
DC-40 kHz |
± 180 Vpk |
| DC-50 kHz |
± 150 Vpk |
| DC-150 kHz |
± 50 Vpk |
| DC-200 kHz |
± 25 Vpk |
| Maximum Continuous Output Power |
3300 watts RMS |
| Power Sinking |
1.2 kVA at 120VAC |
| Slew Rate |
41 V/μSec |
| Phase Response |
± 5 degrees (10 Hz - 10 kHz) |
| Unit to Unit Phase Error |
+/- 0.1 degrees at 60Hz |
| Output Offset: |
7548 |
Less than 5 mV, field adjustable to less than 1 mV |
| 7548P |
Less than 200 μV |
| Output Offset Current |
Less than 10 mill amperes DC |
| DC Drift |
7548 |
±1.5 mV |
| 7548P |
± 400 μV (from cold to maximum operating temperature); ±200 μV (after 20 minutes of operation) |
| Residual Noise |
Unfiltered |
Less than 75 μV |
| |
Filtered |
(400 Hz - 30 kHz): Less than 55 μV |
| THD |
DC - 30 kHz less than 0.1% |
| Input Characteristics |
| Balanced with ground |
Three terminal barrier block connector 20 k ohm differential |
| Unbalanced |
BNC connector, 10 k ohm single ended |
| Gain |
Voltage Mode |
20 volts/volt |
| |
Current Mode |
20 amperes/volt |
| Max Input Voltage |
± 10 V balanced or unbalanced |
| Input Impedance |
20 kOhm differential |
| Input Sensitivity |
3.0V input for 3800W output into 1 ohm (adjustable) |
| Common Mode Rejection Range |
± 11 VDC maximum |
| Common Mode Rejection Ratio |
70 dB |
| Display, Control, Status, I/O |
| Front Panel LED Displays indicate |
Run, Ready, Standby, Stop, and Fault conditions in the output stage |
| LCD Display |
Lists type of fault condition and gives suggested corrective action |
| Soft Touch Switches for |
Run (Enable), Stop, Reset |
| User Configurable |
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 |
| Back Panel |
| Power Connection |
NEMA-style locking receptacle; matching AC connector also included |
| Signal Output |
4-position terminal barrier block |
| Signal Input |
User-selectable Unbalanced BNC or Balanced Barrier Strip |
| Interlock Connector |
25-pin D-sub connector used for amplifier control and status applications; also used in multi-amplifier applications |
| Communication Capabilities |
| Current Monitor |
± 1V / 20A ±1% |
| Voltage Monitor |
± 1V / 1V ±1% |
| Reporting |
System Fault, OverTemp, Over Voltage, Overload |
| Control |
Force to Standby; Reset after a fault |
| Protection |
| Over/Under Voltage |
± 10% from specified supply voltage amplifier is forced to Standby |
| Over Current |
Breaker protection on both main power and low voltage supplies |
| Over Temperature |
Separate Output transistor, heat sink, and transformer temperature monitoring and protection |
| Physical Characteristics |
| Chassis |
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 |
| Weight |
103 lbs. (46.7 kg) |
| AC Power |
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. |
| Operating Temperature |
10°C to 50°C (50°F to 122°F), Maximum Output Power de-rated above 30°C (86°F) |
| Humidity |
70% or less, non-condensing |
| Cooling |
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. |
| Dimensions |
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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