Checking The Frequency Response On 40 W Or 80 W Unit - ABB ETL600 Instruction Manual

Revision:
A
Step A1
If one of the coils has reached its end stop, then one should select an alternative connection
scheme for the capacitors. If the tuning coil is at its left end-stop, then the next non identical
capacitor combination for a lower frequency is to be selected.
•
Click on the button left end-stop reached and the new jumper settings appear. Use the same
procedure in case of all other "end-stop has been reached" events.
•
To undo the "end-stop reached" modifications, click on the Default button in the Coil L1 or in
the Coil L2 field respectively.
•
Click Ok to add the new filter settings to the equipment configuration, to discard them click
Cancel in the Tuning Tx RF filter dialog box.
4

Checking the frequency response on 40 W or 80 W unit

The frequency response check determines the selectivity of the filter for 75 and 125 Ohm line
impedance. Use the following steps.
1. The Tx tuning adapter is inserted in place of the RF hybrid (P3LE) and the RF hybrid is
plugged on top of it. The U
wideband range and in high input impedance mode.
2. If not already done, switch on the power of the ETL600, start up the HMI600 on the PC, log on
to the local ETL600 using equipment ID 0 and upload configuration and status of the
equipment.
3. Choose the Equipment menu and click Tuning & testing.
4. A warning dialog box appears, click OK.
5. Click Tune Tx RF filter to get the Tuning Tx RF filter dialog box.
6. Check if the correct filter center frequency f0 and bandwidth are shown.
7. The adapter P3LL is set for the following:
• FUNCTION
• Position of S1
• Position of S2
• Position of S3
• Position of LOAD
8. On the Tuning Tx RF filter box click Check Tx RF filter.
9. Click Activate fo, measure the U
10. For checking the selectivity, (B
• click Activate fo - 2 · B
The limit for U
P < (A - x dB), value x as indicated in HMI600
• click Activate fo + 2 · B
The limit for U
P < (A - x dB), value x as indicated in HMI600
11. Terminate the action by clicking deactivate frequency and to return to the Tuning & testing
main menu click Cancel.
Language:
EN
of P3LL is connected to the selective level meter in the
output
: A
: L1, FILTER
: FILTER
: OFF
: 75 Ohms or 125 Ohms
in dB and designate it as A.
output
= 8, 16 or 32 kHz)
Tx
and measure the U
Tx
is:
output
and measure the U
Tx
is:
output
Page:
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(P).
output
(P).
output