2021_Test_Spec 电路图.pdf

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1、. . INDIGO 2021 COMPRESSOR TEST SPEC TEST SPECIFICATION: TL Audio Issue 1: 29th Januarv l() Tolerance on inputs +/-O.3dB, outputs +1-ldB, uDIeu stated otherwise. Tests must be performed in sequence, with ooatrols changed only as indicated. I. MAINS VOLTAGE: Set to %JOV. 2. GROUND CONTINUITY: Umit 0.

2、01 ohm8. 2.1 Measure the resistance n the ground pin of the IEC inJet to the chassis ground screw. 3. VISUAL INSPECTION: the unit, paying particular attention to the following: 3.1 . the orientation of JXwer suWly diOints A and B respectively. F RadioFans.CN 收音机爱 好者资料库 . . , Perform tests 5.1 to 8.5

3、 for both channels: 5. INPUTS: 5.1 LINE INPUT: Output OdBu. Compressor: XLR Input, Gain OdE, XLR OIP, Compressor Out, Threshold +20, Gain Make Up (GMU) 0dB A2: 1KHz, Sine, OdBu, 22-22k Filter, Meter. Adjust RV3 (Ch A) /RV4 (Ch B) on PCl33 for OdBu output. Adjust RVI and RV4 on PCl33 for A and B bal

4、respectively. .2 INPUT GAIN: A2: -20dBu. Compressor: ChC(:k input gain variation +/-20dB. A2 level to OdBu. S.3 COMPRESSOR IN: 0ut1JIt OdBu. Adjust RV2 (channel A) and RV7 (channel B). S.4 HIJM AND NOISE: limit -80dBu. A2: Muteutput. S.S AUX INPUT,LO GAIN: Output-14dBu. A2: -20dBu. Comr: Inprt to Au

5、x Jack, Gain OdB, Lo Gain. 5.6 A UX INPUT, m GAIN: Output + JdBu. Compressor: Hi Gain. : i S.7 UNBALANCED INPUT AND OUTPUT: Output -20dBu. Compressor: Inplt to unbalanced jack, ou from unOOlancedjack. RadioFans.CN 收音机爱 好者资料库 . . . . . 6. DISTORTION: Limit 0.02% A2: 22-22K Filter out, 11:0). Comp-css

6、or: InJ:KJl and output via XLR Comp out. 7. THRESHOLD ADJUSTMENT. A2: Level, OUl -20dBu. Compressor: With Threshold and Ratio fully anti-clockwise, check outlXJt -20dBu. Set Threshold and Ratio fully clockwise, increase A2 out to +4dBu, and adjust Threshold trim for .7.OdBu outpJ! (RV5 and RV6 on PC

7、l36 for A and B reSlx:ctively). 8. METERS: 8.1 AUDIO LEVEL: +4dBu=OVU. I Compresor: Threshold +20dB, check outpJt +4dBu. . Adjust Meter REF (RV4) to just mtnninat. 0dB LED. 8.2 GAIN REDUcnON: -6dB. Compressor: Threshold -20dB, adjust Ratio for -2dBu outpJ!. Meter Gain Redo. Adjust R V8 to just illum

8、inate -6dB LED. 8.3 GAIN MAKE-UP: +24dBu. Compressor: Threshold +20dB, GMU maximum. Return GMU to minjmulrt after test. 9. SOAK TEST. With top and oottom covers fitted. 10. DYNAMIC TEST. Check operation of the compreesor controls with the tone-burst generator. in mono and stereo mode 11. QA CHECK. RadioFans.CN 收音机爱 好者资料库