ABB ETL600 Instruction Manual page 166

ABB Switzerland Ltd
3. Deactivate Squelch at SNR alarm. The squelch functionality should
work nearby the port, where the external device is connected.
Configure the transit filter:
From the dialog 'Configure Teleoperation, ext. teleprotection':
4. Select filter from the Output filter section.
Note:
5. Select Standard transit filter for a filter without group delay
equalization or select Special transit filter for a filter with group
delay equalization.
Note:
6. Select the frequency range of the filter.
7. Click OK .
Configure input level:
From the sheet ' Configure Teleoperation, ext. teleprotection ' click:
8. Specify signal.
9. First select a suitable 'Reference signal' . Normally, this is the
signal of the most important service routed via this port.
Note:
10. All signals routed via this port must be selected in the list 'Signals
after selected filter ' in the Input sheet . Signals, which are
rejected by the transit filter must not selected. E.g. don't select the
pilot!
Note:
11. Select the correct ' Input level ' for the signal, which in the
configuration printout appears as 'Reference signal level input'. It is
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1KHW001489-EN
To select an output filter is the standard solution for a
transit AF operation as described in the functional
description of O4LE, chapter 3 . In any case, the
passband of the selected filter must not include the
pilot band..
Preferably use a Special transit filter if one with an
appropriate passband is available! When a special
transit filter has been selected, the allpass filter of the
associated channel should also be activated.
To activate the Allpass filter : From the menu
Configuration
settings , enable Allpass filter for group delay
equalization (transmitter sided) .
If the services to be routed via the AF port are not
sensitive to group delay distortion, as in the case of
speech, a Standard transit filter can be used.
You have to select the same Reference signal at the
connected AF output port of the other equipment!
This is very important, because for every selected
signal the HMI600 reserves a certain output power at
the end amplifier. If signals entering the port are not
declared in the list, the amplifier might clip and the
operation of the PLC link will be disturbed!
November 2005
click System , click
Configuration and Set-up
ETL600
Channel