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8508 OPERATOR'S MANUAL – SECTION 1
1 Introduction
Congratulations on your purchase of an 8500
series digital power amplifier. 8500 series ampli-
fiers are the first wide-bandwidth, high-power
digital amplifiers available from any manufacturer.
They are fast enough for DC automotive dropout
testing and capable of AC voltages required for
ISO 61000 and Aviation testing. Plus, they have
low enough noise and distortion specifications to
be the reference power source in power quality
measurements.
1.1 Features
Wide Bandwidth and Flexible
The 8500 series amplifier is capable of reproduc-
ing AC, DC and AC+DC waveforms into loads from
a dead short to high impedance. It can be used to
simulate a battery at 13.5 VDC or be an AC source
with a L-N potential of up to 250 VAC. Rated cur-
rent, for a given voltage, is available for all wave-
form types (AC, DC or AC+DC) at frequencies
from DC to 50 kHz. Voltages from 0 to 250 VRMS
are available with no changes in configuration.
Reuses Energy from Reactive Loads
The 8500 series excels when it comes to driv-
ing reactive loads. As frequencies increase, the
effective-impedance of the load becomes a much
larger part of the total load to be driven (especially
with inductive loads like coils).
However, when driving reactive loads, the 8500
series amplifier is capable of receiving, reprocess-
ing and returning to the load up to 5X its rated
power. The result is a system capable of up to 100
96-8005549_3-18-21
Figure 1.1 – 8500 Series Front Panel
kVA output while drawing less than 20 kW of AC
mains power!
1.2 Configuration Options
A key to everyday product usability is quick and
easy product (re)configuration. The 8500 series
amplifier provides all key configuration controls on
the back panel of the unit. Configuration options
available include:
•
Gain: Fixed or variable gain (0 to 40)
•
Current Limit: From 5% to rated limit (to
protect fragile DUTs or where specified in the
Standard)
•
DC Control: DC enabled or DC blocked and
DC Servo (for driving transformer-coupled
loads, coils)
Input: Balanced and/or unbalanced
•
•
Mode: Voltage source or current source
•
Output Impedance: Variable from 0 to 1 ohm
(Voltage mode)
Sense: Sense line with correction of up to 4
•
volts
Bandwidth
Voltage
Current
Distortion
Power
Apparent Power
Information subject to change
Performance Overview
DC - 50 kHz
0 to 250 V
RMS;
0 to 350 VDC
Up to 300 A
0.1%
Up to 20 kW
Up to 100 kVA
RMS
5
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