AVTECH ELECTROSYSTEMS AVRQ-4-B, Instructions Manual

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length of cable attached to this input, and the source driving it, it may be desirable to
add a coaxial 50 Ohm terminator to this input to provide a proper transmission line
termination. The Pasternack (www.pasternack.com) PE6008-50 BNC feed-thru 50
Ohm terminator is suggested for this purpose.)
6. GPIB Connector . A standard GPIB cable can be attached to this connector to allow
the instrument to be computer-controlled. See the “Programming Manual for -B
Instruments” for more details on GPIB control.
7. RS-232 Connector. A standard serial cable with a 25-pin male connector can be
attached to this connector to allow the instrument to be computer-controlled. A user
name (“admin”) and a password (“default”, as shipped from the factory) are required
when logging into a serial terminal session. The internal controller attempts to auto-
sense the parity setting. It may be necessary to send a few return characters before
attempting a login in order to provide enough data to allow this auto-sensing to work.
(A standard Linux “agetty” process is used to implement serial control internally.) See
the “Programming Manual for -B Instruments” for more details on RS-232 control.
8. Network Connector . This Ethernet connector allows the instrument to be remotely
controlled using the VXI-11.3, ssh (secure shell), telnet, and http (web) protocols. See
the “Programming Manual for -B Instruments” for more details.
9. DUT Door . This is the door that provides access to the DUT socket. To open it, pull on
the chrome knob. When closed, the door is held latched in place magnetically.
The high voltage output is automatically disabled when the DUT door is opened. The
door must be closed during tests.
10.HV PULSE OUT CONNECTOR . The BNC connector provides access to the high
voltage (up to ±2 kV) pulse that is applied to the DUT, for monitoring purposes. This
signal must be observed on an oscilloscope to accurately measure the dV/dt rate of
the high voltage pulse.
A Tektronix P5100 high-voltage probe with the 013-0291-00 probe-tip-to-BNC
adapter, or a similar arrangement, should be used to connect to this output.
CAUTION: Voltages as high as 2 kV may be present on the center conductor of
this output connector. Avoid touching this conductor. Connect to this connector
using a Tektronix P5100 high-voltage probe with the 013-0291-00 probe-tip-to-BNC
adapter, or a similar arrangement, to ensure that the center conductor is not
exposed.
DO NOT CONNECT THIS OUTPUT DIRECTLY TO AN OSCILLOSCOPE. The
oscilloscope will be damaged by the high voltages. Use a Tektronix P5100 high-
voltage probe with the 013-0291-00 probe-tip-to-BNC adapter, or a similar
arrangement.
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