PROGRAMMING TESTS VOLTECH AT3600 USER MANUAL
PAGE 3.4.30. VPN 98 - 024 TEST PROGRAM EDITOR
4.16. LBAL – LONGITUDINAL BALANCE
The longitudinal balance test is Voltech's preferred method to measure what is
effectively the Common Mode Rejection Ratio of a transformer designed to connect
to a balanced line. Two measurements are performed each by applying a voltage to
the transformer and measuring the resulting voltage to calculate the CMRR.
This test is suitable for audio & telecommunication transformers and checks the
effective common mode rejection ratio of the transformer.
On selecting "LBAL Longitudinal Balance" from the available tests window, a
dialogue box will be displayed:
To program the test:
1. Enter the voltage and frequency parameters of the test signal.
(If in doubt, refer to Chapter 7 - ‘Test Conditions’, which lists recommended
test conditions.)
Note also that the Measure button may be used here as outlined in section 3.9.
2. Select the integration time you require.
'Medium' is the default setting. 'Long' will give more stable readings (for
tighter limits) at the expense of an increased test time, and 'Short' will test at the
maximum speed, but may give a slightly noisier reading.
3. Enter the names of the Hi and Lo input terminals and Common Terminal.
4. Enter the names of the Hi and Lo output terminals.
To Next Page
Loading...