 Amplitudes to 500, 700, or 1000 Volts

 Amplitudes to 500, 700, or 1000 Volts
AVR-5, AVR-7, and AVR-8 SERIES
500, 700, 1000 VOLT OUTPUTS
Amplitudes to 500, 700, or 1000 Volts
20 or 50 ns rise and fall times
Pulse widths variable from 0.1-100 us, or 0.2-200 us
PRF to 1 kHz or 10 kHz
Peak power output to 20 kW
For time-of-flight and many other applications
IEEE-488.2 GPIB and RS-232 interfaces
Optional ethernet port for VXI-11.3 support
A 700V, 1us pulse from model AVR-7B-B
The AVR-5B, AVR-7B, and AVR-8A series of pulse
generators are fast high-voltage pulse generators
capable of driving load impedances of 50Ω and higher.
These easy-to-use models are suitable for many
different test applications, including resistor and
attenuator testing, semiconductor and laser diode
characterization, time-of-flight applications, and many
other applications.
Model AVR-5B-B provides up to 500V out (to 50Ω) with
rise times of 20 ns and pulse widths variable from 100
ns to 100 us. The pulse repetition frequency (or “PRF”)
is variable from 1 Hz to 10 kHz. This model will provide
peak output power of 5000 Watts and average outputs
of 50 Watts (i.e. 1% maximum duty cycle). The standard
output connector is N-type.
Model AVR-7B-B is similar, but provides up to 700V (to
50Ω). This model will provide peak output power of
10000 Watts and average outputs of 50 Watts (i.e. 0.5%
maximum duty cycle).
The AVR-8A-B provides up to 1000V out (to 50Ω) with
rise times of 50 ns and pulse widths variable from 200
ns to 200 us. PRF is variable from 1 Hz to 1 kHz. This
model will provide peak output power of 20000 Watts
and average outputs of 40 Watts (i.e. 0.2% maximum
duty cycle). The standard output connector is SHV-type.
The output stages in all models will safely withstand any
combination of front panel control settings, output open
or short circuits, and high-duty cycles. An internal power
supply monitor removes the power to the output stage
for five seconds if an average power overload exists.
The outputs will source up to 12, 16, or 23 Amps (for
models AVR-5B-B, AVR-7B-B, and AVR-8A-B,
respectively) and will automatically shut down if the load
current exceeds this rated current.
Aside from the internal clock, all models can also be
triggered by a single-pulse pushbutton or an external
TTL-level trigger input. When triggered externally, the
output pulse width can be set to track the input trigger
pulse width (PW OUT = PW IN). A delay control and a sync
output are provided for oscilloscope triggering. A gate
input is also provided. Either output polarity can be
provided, as well as a dual output polarity option.
All models include a computer control interface (see
http://www.avtechpulse.com/gpib for details). This
provides GPIB and RS-232 computer-control, as well as
front panel keypad and adjust knob control of the output
pulse parameters. A large back-lit LCD displays the
output amplitude, polarity, frequency, pulse width, and
delay. To allow easy integration into automated test
systems, the programming command set is based on
the SCPI standard, and LabView drivers are available
for download at http://www.avtechpulse.com/labview.
The -VXI option adds a rear-panel Ethernet connector,
allowing an instrument to be remotely controlled using
the VXI-11.3, ssh, telnet, and web protocols. In
particular, the VXI-11.3 features allows software like
LabView to control an instrument using standard VISA
communications drivers and network cabling, instead of
using older-style GPIB cabling and GPIB controller
cards. See http://www.avtechpulse.com/options/vxi.
All models are available with optional electronic analog
control of the amplitude (the “-EA” option). With this
feature, the output amplitude may be controlled by an
externally applied analog DC voltage (0 to +10 V).
The amplitude is controlled by internal high-voltage DC
power supplies. Standard models use a simple lowpower discharge circuit to reduce the amplitude when
settings are lowered. A higher-power / higher-speed
active-discharge circuit is available as an option (-QD
option), which reduces the discharge times significantly.
This option is recommended for high-throughput
production-line test applications.
The standard output connectors may optionally be
changed from N (on the AVR-5 and AVR-7 series) or
SHV (AVR-8) to SHV, MHV or HN by adding “-SHV”, “MHV”, or “-HN” to the model number. All models require
100 - 240 V, 50 - 60 Hz, and are mounted in a rugged
all-metal 3.9” x 17” x 14.8” chassis.
A burst mode option is also available, allowing a burst of
1-500 pulses to be generated in response to a single
trigger event (http://www.avtechpulse.com/options/br).
The maximum pulse widths and duty cycles of these
instruments may be extended if the intended load is
high-impedance (i.e., much greater than 50Ω, such as a
plate load). Contact the factory with your special
requirements. A parametric search engine is available
online at http://www.avtechpulse.com/pick to assist you
in selecting the best instrument for your application.
Models in the AVR series may be suitable for replacing
obsolete models from the former Velonex Corporation in
many applications.
For applications requiring high-voltage pulses with faster
rise times, see the AVRZ-5 series (datasheets & pricing
are available at http://www.avtechpulse.com/speed),
which offers 0 to 500V pulses with 9 ns rise times, and
pulse widths as low as 15 ns or as high as 10 us.
See also the AVRF Series (datasheets and pricing at
http://www.avtechpulse.com/medium/avrf-7a) for 600
Volt and 750 Volt units with 6 and 7.5 ns rise times.
Actual test waveforms from shipped units are available
from the online data pages for each model, at:
• http://www.avtechpulse.com/medium/avr-5b/#testresults
• http://www.avtechpulse.com/medium/avr-7b/#testresults
• http://www.avtechpulse.com/medium/avr-8a/#testresults
operating in
0 to 700V
(0 to +10V)
70 × VDC-IN
When triggered externally, these instrument may be operated in
Mode A or Mode B. For Mode A, the pulse width is controlled by
the front panel controls but in Mode B the output pulse width
equals the input trigger pulse width. For a 50Ω load, the pulse
width may be as high as 100 us but for very high impedance
loads (e.g. a parallel plate load), the pulse width may extend to
The output amplitude of units with the -EA option may be
controlled either by the front panel controls or by an externally
applied 0 to + 10 V DC control voltage. Note that when driving a
50Ω load the pulser will supply up to 14A to the load. Also note
that the pulsers have an extremely low source impedance (≈ 2Ω)
so the output is largely independent of the load resistance (e.g.
700V maximum for a 50Ω load and for a high impedance load).
Use the “Pick the Perfect Pulser” parametric search engine
at http://www.avtechpulse.com/pick
to find the best pulser for your application!
Amplitude: (RL ≥ 50Ω) :
Output impedance:
Rise & fall times (20%-80%):
Pulse width (FWHM)4:
external trigger mode:
internal trigger:
Duty cycle (max):
Average power out (max):
Max. droop at max. pulse
Amplitude discharge time
constant, τDIS (typical)12:
Minimum time between full
discharges of the HV PS13:
Amplitude charge-up time
GPIB and RS-232 control2:
LabView Drivers:
Ethernet port, for remote
control using VXI-11.3, ssh,
telnet, & web:
Settings resolution:
Settings accuracy:
Burst mode:
Propagation delay:
Jitter (Ext trig in to pulse out):
Trigger modes:
Variable delay:
Sync output:
Gated operation:
Power requirements:
Dimensions (H x W x D):
Chassis material:
Temperature range:
< 20 to 500 Volts
< 25 to 700 Volts
2Ω, approximately
< 25 to 1000 Volts
≤ 20 ns
100 ns to 100 us
0 to 10 kHz
1 Hz to 10 kHz
50 Watts
≤ 50 ns
200 ns to 200 us
0 to 1 kHz
1 Hz to 1 kHz
40 Watts
2 seconds
10 seconds
Standard: 16 seconds
Standard: 30 seconds
With -QD option: 1 second
With -QD option: 1 second
Standard: > 5 τDIS
With -QD option: 10 seconds
3 seconds
Positive or negative or both (specify -P, -N, or -PN)
Standard on -B units. See http://www.avtechpulse.com/gpib for more information.
Available at http://www.avtechpulse.com/labview.
Optional6. Recommended as a modern alternative to GPIB / RS-232.
See http://www.avtechpulse.com/options/vxi for details.
The resolution of the timing parameters (pulse width, delay, period) varies,
but is always better than 0.15% of (|set value| + 20 ns).
The amplitude resolution is < 0.1% of the maximum amplitude.
Typically ± 3% (plus ±1V or ± 2 ns) after 10 minute warmup. For high-accuracy applications
requiring traceable calibration, verify the output parameters with a calibrated oscilloscope.
Optional11. Generates 1-500 pulses per trigger event.
See http://www.avtechpulse.com/options/br.
≤ 200 ns (Ext trig in to pulse out)
± 100 ps ± 0.03% of sync delay
Internal trigger, external trigger (TTL level pulse, > 10 ns, 1 kΩ input impedance),
front-panel “Single Pulse” pushbutton, or single pulse trigger via computer command.
In the external trigger mode, the pulse width may be set by the instrument,
or it may be set to track the input pulse width.
Sync to main out: 0 to 1.0 seconds, for all trigger modes (including external trigger).
> +3 Volts, > 50 ns, will drive 50 Ohm loads
Synchronous or asynchronous, active high or low, switchable.
Suppresses triggering when active.
OUT: N7,8
OUT: SHV9,10
Trig, Sync, Gate: BNC
Trig, Sync, Gate: BNC
100 - 240 Volts, 50 - 60 Hz
100 mm x 430 mm x 375 mm (3.9” x 17” x 14.8”)
cast aluminum frame and handles, blue vinyl on aluminum cover plates
+5°C to +40°C
1) -B suffix indicates GPIB-equipped model.
2) For analog electronic control (0 to +10V) of amplitude, add the suffix
-EA to the model number. Electronic control units also include the
standard front panel controls.
3) For operation at amplitudes of less than 10% of full-scale, best results
will be obtained by setting the amplitude near full-scale and using
external attenuators on the output.
4) The output pulse width may also be controlled externally by applying a
TTL-level trigger of the desired width to a rear-panel BNC connector
(PW IN = PW OUT mode).
5) Indicate desired polarity by suffixing the model number with -P or -N
(i.e. positive or negative) or -PN for dual polarity option.
6) Add the suffix -VXI to the model number to specify the Ethernet port.
7) SHV, MHV or HN output connectors can also be provided. To specify,
suffix the model number with -SHV, -MHV or -HN as required.
8) An N-male to BNC-female adapter (Amphenol P/N 31-216) is
available. Add the suffix -ADPT2 to the model number to order this
9) An adapter kit, consisting of an SHV PLUG to MHV FEMALE adapter
and an MHV MALE to BNC FEMALE adapter, is available. Add the
suffix -ADPT1 to the model number to order this kit.
10) MHV, N or HN output connectors can also be provided. To specify,
suffix the model number with -MHV, -NC or -HN as required.
11) Add the suffix -BR to the model number to specify the burst mode
option. See http://www.avtechpulse.com/options/br for details about
this option.
12) The output amplitude is controlled by internal high-voltage DC power
supplies. When the amplitude setting is reduced, the high voltage
decays in an exponential fashion, with the typical time constant noted
in this specification. The -QD option provides a fast active-discharge
13) More frequent discharges will cause the instrument to overheat, and
may cause damage.
14) The output amplitude is controlled by internal high-voltage DC power
supplies. This is the time required for the power supplies to rise from
5% to 95% of their full value in response to a change in settings from
zero to the maximum setting.
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