Information subject to change
97-7796264_09-04-2020
7548/7794/7796/7796HC OPERATOR’S MANUAL – SECTION 8
36
8
Specifications
8.1 Performance (Controlled Voltage Mode)
Note: Testing performed at 208V/415V AC. The 7548/7794/7796
amplifiers can operate from 400V AC ±10%. Since these amplifiers
have an unregulated power supply, low line conditions may slightly
affect the maximum voltage potential.
Accuracy was measured when driven into a 10-ohm load with
between 0.1VDC and 6VDC or between 0.2V AC and 5V AC
presented at its inputs.
Frequency Response:
DC - 30 kHz, +0.1 to -0.5 dB
Maximum Continuous Output Power:
7548:
3300 watts RMS
7794:
5000 watts RMS
7796:
5000 watts RMS
7796HC:
2500 watts RMS
Slew Rate:
>35 V/μs
Phase Response
(10 Hz – 10 kHz)
:
7548:
± 5 degrees
7794, 7796 and 7796HC:
±8.3 degrees
Unit to Unit Phase Error:
±0.1 degrees at 60Hz
Output Offset:
Less than 200 µV
Output Offset Current:
Less than 10 mA DC
Output Impedance:
3.2 mΩ in Series with 2.2 µH
DC Drift:
± 400 µV (from cold to maximum operating
temperature); ±200 µV (after 20 minutes of operation)
Residual Noise, 10 Hz to 20 kHz:
Less than 250 μV
THD, DC - 20 kHz,
7548, 7794 and 7796HC:
>0.25%
7796:
>0.2%
Input Characteristics,
Balanced with ground:
Three-terminal barrier-
block connector, 20 k
Ω
differential
Unbalanced:
BNC connector, 10 k
Ω
single ended
Gain:
Voltage Mode:
20 volts/volt
Current Mode:
20 amperes/volt
Gain Linearity
(over input signal, from 0.2V to 5V)
,
DC:
0.0125%
AC:
0.030%
Max Input Voltage:
± 10V balanced or unbalanced
Input Impedance:
20 k
Ω
differential
Input Sensitivity:
3.0V input for 3800W output into 1 ohm (adjustable)
Common Mode Rejection Range:
±11 VDC maximum
Common Mode Rejection Ratio,
7548:
Better than -65 dB
7794, 7796, 7796HC:
Better than -70 dB
8.2 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
LCD Display:
Can be configured for up to four simul
-
taneous displays reporting one, two, or all four of the
following: V
p
, V
RMS
, A
p
, A
RMS
. Also reports any fault
conditions that occur and suggests corrective action.
Back Panel
Power Connection:
NEMA-style locking receptacle;
matching AC connector also included
Signal Output:
4-position terminal barrier block
(OUTPUT/COMMON/SAMPLED COMMON/CHAS
-
SIS GROUND); resistor installed between SAMPLED
COMMON AND CHASSIS GROUND is a 2.7-ohm,
2W, 5%, metal-oxide resistor
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
8.3 Communication Capabilities
Current Monitor:
± 1V / 20A ±1%
Reporting:
System Fault, OverTemp, Over Voltage,
Overload
Control:
Force to Standby; Reset after a fault
8.4 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
8.5 Physical Characteristics
Chassis:
Black powder-coat chassis with all alu-
minum construction; designed for stand-alone or
rack-mounted operation. The amplifier occupies five
(7548) or seven (7796) EIA 19-inch-wide rack units.
Weight:
7548:
103 lbs (46 kg), Typical shipping:
115 lbs (52.2 kg)
7794, 7796 and 7796HC:
153 lbs (69 kg),
Typical shipping: 168 lbs (76.2 kg)
Содержание 7548
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