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13
SVANTEK 977W User Manual
2.2
Input and output sockets of the instrument
Top cover of the instrument
The measurement input
is placed in the centre of the instrument’s top cover. It is
the TNC compatible socket. The
SV 12L
microphone preamplifier has a specially
designed matching TNC plug and a locking screw to secure the preamplifier to
the meter body. The accelerometers must be connected to the instrument also
using the TNC connector. After connecting the preamplifier or the accelerometer
cable to the measurement input, the screw should be tightened to light resistance
only. Do not over tighten this connector. It is not necessary to remove this
preamplifier from the top of the instrument unless the meter is in a calibration
laboratory as it is always used close coupled to the meter body. The full
description of the signals connected to the socket is given in Appendix C.
Bottom cover of the instrument
In the bottom cover, there are four sockets, placed from the right to the left as
follows:
7-16V
,
Serial
,
USB
and
I/O
.
There is a memory micro SD-card socket under the bottom cover of the
instrument and spaces for the 4 x AA batteries.
The
USB
socket is the USB
Device
1.1 interface
– a serial interface working with
12 MHz clock. Thanks to its speed, it is widely used in all PCs. In the instrument,
the standard 4-pin socket is used.
The
Serial
socket is Serial Port provides data transfer using RS232 data format
but in TTL logic standard by means of the SV 55 interface. It conforms to the EIA
Standard RS 232C and enables the user to programme remotely all instrument
functions and the transmissions to and from the instrument with speed from 300
bit/s to 115200 bit/s.
The additional multi-purpose input / output socket, called
I/O
, is a 3.5 mm jack
socket. On this socket, in case when the Analogue Output functionality is
selected, the signal from the input of the analogue / digital converter (before any
frequency correction) is available. This signal can be recorded using a magnetic
recorder or observed on an oscilloscope. The Digital Input as another
functionality that serves as the external trigger to the instrument, while the Digital
Output is used to generate the trigger pulse or alarm pulse from the instrument.
The user can connect an external DC power 7-16V adapter to the
7-16V
socket
located on the bottom cover of the instrument. The current consumption depends
on the voltage of the power supplier.
There is a memory micro SD-card slot under the bottom cover of the instrument
and spaces for the 4 x AA batteries.
All sockets are described in detail in the Attachment C for this manual.
Note: Switch the power off before connecting the instrument to any other device (e.g. a Personal
Computer).