1
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R
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DC resistance
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pin 2-3, test for < 200 Ohms
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To check the winding resistance is below a maximum. Also acts as a check of correct wire gauge and good termination.
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2
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R
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DC resistance
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pin 7-8, test for <50 Ohms
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To check the winding resistance is below a maximum. Also acts as a check of correct wire gauge and good termination.
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3
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R
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DC resistance
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pin 6-5, test for <50 Ohms
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To check the winding resistance is below a maximum. Also acts as a check of correct wire gauge and good termination.
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4
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R
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DC resistance
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pin 7-6, test for <100 Ohms
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To check the winding resistance is below a maximum. Also acts as a check of correct wire gauge and good termination.
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5
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TR
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Turns Ratio
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Energize pins 6-7,1V 1 kHz, check Turns ration 6-7:3-2 to be 1.2:1 -+ 2%
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To check correct ratio of windings from all of primary to secondary
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6
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TR
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Turns Ratio
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Energize pins 6-5,1V 1kHz, check Turns ration 6-5:7-8 to be 1.2:1 -+ 2%
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To check correct ratio of windings from P1 to P2
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7
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RLOS
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Return Loss
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Pin 7-6 , 5V 3Khz, Real impedance = 600 Ohms (this is the resistor across 2-3), check that RLOS > 10dB as per spec sheet
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This test measures the power reflected by the transformer, compared to the transmitted power. As such, Large RLOS values equate to better power transfer and lower losses.
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8
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ILOS
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Insertion Loss
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Input pins 6RES-7RES (so that the 2 x 300 ohm resistors are used). Output pins 3-2. Source R = 600 Ohms, Load =600 Ohms, test at 5V, 3kHz. Check ILOS < 1.5dB
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This test measures the power lost inside the transformer. It is expressed as theoretical power over real power, so an ideal transformer will have a low ILOS number
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9
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FREQ
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Frequency Response
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Input pins 6RES-7RES (so that the 2 x 300 ohm resistors are used). Output pins 3-2. 5V 2 KHz as nominal, check to 500Hz, 1kHz, 3kHz, 4kHz. Limits +/- 0.5dB as per spec.
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This test checks the performance if ILOS over a user-selected range of frequencies compared to one nominated frequency. Results are expressed as the largest deviation from nominal, hence a large result signifies poor frequency response.
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10
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LBAL
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Longitudinal Balance
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Hi ; 6RES-7RES, LO ; 3-2, Common ; CORE . 5V, 200 Hz. Check for > 60 dB, as per spec.
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This test checks the common mode performance of the transformer. The 2x 300 Ohm resistors are used to simulate the source line impedance, and the 600 Ohm is still present as the load impedance. A high figure represents good rejection of common mode signals
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11
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LBAL
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Longitudinal Balance
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as above, but at 1Kz, Check for > 60 dB as per spec.
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as above to check performance at 1Khz
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12
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LBAL
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Longitudinal Balance
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as above, but at 4Kz, Check for > 45dB as per spec.
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as above to check performance at 4kHz
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13
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HPAC
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AC Hi-Pot
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1kV AC, 1 second, Pins 1&4 High, Pins 2,3 Lo
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To check isolation as per datasheet.
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AT5600 Run time 4.18 sec
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(AT3600 Run time 10.81 sec)
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