AVTECH ELECTROSYSTEMS AVRK-3-B, Instructions Manual

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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. AMP Connector . (Optional feature. Present on "-EA" units only.) The output amplitude
can be set to track the voltage on this input. Zero Volts in corresponds to zero
amplitude output, and +10V in corresponds to maximum amplitude out. This mode is
activated by selecting "Ext Control" on the front-panel amplitude menu, or with the
"source:voltage external" command.
10.MON Connector . The monitor output provides an attenuated replica (÷10) of the
voltage on the main output. The monitor output is designed to operate into a 50 Ohm
load.
11.OS Connector . (Optional feature. Present on "-OS" units only.) The desired DC offset
is applied to this connector. Internally, it is connected to the output centre conductor
via a high quality RF inductor. Do not exceed ±50V, 250 mA. When not used, the OS
input should be connected to ground.
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