Studer-970-Service-Manual-Section-3电路原理图.pdf
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1、Professional Audio System Components Date printed: 29.11.01E13 2.1.7 VCA with Electronically Balanced Connections1.914.515 In contrast to the VCA 1.914.518/528 (chapter 2.1.8), this assembly fea- tures an electronically balanced input and output. It is intended for use in balanced audio systems for
2、a variety of applica- tions, especially when gain is to be controlled from a remote point. It will be useful in audio-video post-production work where suitable DC ramps can control cross-fades, voice-overs, etc. Its high overload margin and its exceptionally low noise and distortion performance make
3、 it the perfect choice for high-quality audio applications. By connecting the gain control terminals of a number of VCAs to a com- mon potentiometer or fader, several audio channels may thus be con- trolled simultaneously. Two control inputs provide VCA gain control from two different remote points
4、RadioFans.CN 收音机爱 好者资料库 Professional Audio System Components E14Date printed: 29.11.01 Technical Specifications Input: Impedance 10 k, electronically balanced Clipping point+24 dBu Output:Electronically balanced Recommended load 2 k Maximum level+24 dBu Frequency response0.5 dB, 30 Hz.15 kHz Gain/at
5、tenuation range+40.100 dB, with ext. control Control input: pin1; gain tracking0 V = unity gain; 1 dB/A; jumper 1-2 20 dB/V; jumper 2-3 10 dB/V; jumper 3-4 Control input: pin10; gain tracking10 dB/V THD 3 k Clipping point +20 dBu Output:Impedance 33 or 3.3 k, selectable Max. level+20 dBu Recommended
6、 load 2 k Frequency response0.5 dB, 30 Hz.16 kHz External gain control +40.90 dB (1.914.518.xx) +40.100 dB (1.914.528.xx) Gain/attenuation range (pot. meter)+40.60 dB / +10.70 dB / +10.90 dB (1.914.518.xx only, jumper- selectable) Gain tracking 10 dB/V THD 0.1% Equivalent input noise102 dBu Supply:1
7、5 V (40 mA) Dimensions:MS-card, 34 85 mm Ordering Information:Voltage controlled amplifier with 1 control port1.914.518.xx Voltage controlled amplifier with 3 control ports1.914.528.xx Professional Audio System Components Date printed: 29.11.01E17 2.1.9 Limiter Voltage Processor1.914.519 Together wi
8、th this voltage processor, the VCAs 1.914.518/528 can perform as signal level limiters. The processors threshold can be set within a wide range of levels, so that limiting action becomes effective at a desired level within a range of 15 to +15 dBu. Limiting action attacks within 1 ms, whereas releas
9、e can vary from 50 ms to 5 s, depending on the programs energy content. This means that no audible “pumping” action which is often associated with such a device will occur. After the cessation of loud passages, amplifi- cation will recover only slowly. For stereo applications, a two-channel set- up
10、(VCAs and voltage processor) can be linked, so that identical amounts of gain reduction will take place simultaneously in both channels. The input of the voltage processor has to be wired to the output of the VCA. The processors output, when connected to the VCAs control ter- minal, will effect the
11、necessary gain reduction so that a limiting character- istic is obtained. The limiting threshold is adjustable in a wide range. Re- mote on/off switching of the limiter function is possible. Professional Audio System Components E18Date printed: 29.11.01 Technical Specifications Limiter:Input impedan
12、ce 10 k Max. input level+20 dBu Frequency range30 Hz.16 kHz Output voltage 0.13 VDC Threshold level15 dBu.+15 dBu Attack time1 ms Release time50 ms.5 s, program-depending Compression ratio20:1, in conjunction with a VCA Supply:15 V (10 mA) Dimensions:MS-card, 34 85 mm Ordering Information:Limiter vo
13、ltage processor1.914.519.xx Professional Audio System Components Date printed: 29.11.01E19 2.1.10 1900 Hz Signal Generator1.914.520 This signal generator produces a stable frequency of 1900 Hz to establish communication on outside broadcast lines, as specified in the EBU/CCIR recommendations. Techni
14、cal Specifications Frequency1900 Hz (adjustable) Distortion 1% Output level15.+6 dBu (adjustable) Output balanced and floating Output Impedance, out 1 20 k Frequency20.60 Hz Min. level17 Vrms Nominal level70 Vrms Supply:+15 V (5 mA); 15 V (10 mA); 6 V (2 mA) Dimensions:MS-card, 34 85 mm Ordering Inf
15、ormation:Call decoder 20.60 Hz1.914.521.xx Professional Audio System Components Date printed: 29.11.01E21 2.1.12 Call Decoder 1900 Hz1.914.522 This card contains a call receiver for the standardized 1900 Hz call fre- quency on OB lines. It is tuned to respond to 1900 Hz 1 %. The receiver can be swit
16、ched either to activate an optical or an acoustical signal for the duration of the 1900 Hz call (linked mode), or the acoustical signal can be selected to remain activated until reset (normal mode). The acoustical signal can be generated by an external buzzer (not sup- plied). Technical Specificatio
17、ns Input: balanced, floating; no DC Frequency1900 Hz, 1% Impedance 10 k Min. level30 dBu Nominal level+24 dBu Supply:+15 V (5 mA); 15 V (10 mA); 6 V (2 mA) Insulation rating500 VDC Dimensions:MS-card, 34 85 mm Ordering Information:Call decoder 1900 Hz1.914.522.xx Part No.Qty.Type/Val.DescriptionPos.
18、Idx.Part No.Qty.Type/Val.DescriptionPos.Idx. Studer Audio Components Page: 1 of 1 Call Decoder 1900 Hz 1.914.522.00 ( 1) C 259.06.01021n0PETP, 63V, 10%, RM50 C 359.06.01021n0PETP, 63V, 10%, RM50 C 459.06.02222n2PETP, 63V, 10%, RM50 C 559.05.24724n7PP, 2.5%, 63V0 C 659.34.4121120pCER 63V, 5%, N7500 C
19、 759.06.010310nPETP, 63V, 10%, RM50 C 859.26.52292u2SAL, 20%, 25V0 C 959.06.0224220nPETP, 63V, 10%, RM50 C 1059.06.5474470nPETP, 63V, 5%, RM50 C 1159.26.26896u8SAL 16V 20%0 C 1259.26.26896u8SAL 16V 20%0 C 1359.26.26896u8SAL 16V 20%0 C 1459.26.26896u8SAL 16V 20%0 D 350.04.01251N444875V, 150mA, 4ns, D
20、O-350 D 450.04.01251N444875V, 150mA, 4ns, DO-350 D 550.04.01251N444875V, 150mA, 4ns, DO-350 D 650.04.01251N444875V, 150mA, 4ns, DO-350 D 750.04.111712VZener, 5%, 0.5W, DO-350 IC 150.09.0101TL072Dual op-amp biFET0 IC 250.07.0032FX101IC FX-101 L, ,A0 IC 350.07.10114011Quad 2-inp NAND1 P 154.01.027313p
21、Stecker CIS parallelsteck0 Q 150.03.0515BC307BPNP 100mA 45V0 Q 250.03.0436BC237BNPN 100mA 45V0 R 157.11.35625k6MF, 1%, 02070 R 257.11.35625k6MF, 1%, 02070 R 357.11.312312kMF, 1%, 02070 R 457.11.3104100kMF, 1%, 02070 R 557.11.33923k9MF, 1%, 02070 R 757.11.51551M5MF, 5%, 02070 R 858.01.820320kCermet,
22、10%, 0.5W, horizontal0 R 957.11.3154150kMF, 1%, 02070 R 1057.11.3104100kMF, 1%, 02070 R 1157.11.3104100kMF, 1%, 02070 R 1257.11.310310kMF, 1%, 02070 R 1357.11.310310kMF, 1%, 02070 R 1457.11.52252M2MF, 5%, 02070 R 1557.11.3104100kMF, 1%, 02070 R 1657.11.52252M2MF, 5%, 02071 R 1757.11.31051M0MF, 1%, 0
23、2070 R 1857.11.3104100kMF, 1%, 02070 R 1957.11.52252M2MF, 5%, 02071 R 2057.11.31051M0MF, 1%, 02070 R 2157.11.3104100kMF, 1%, 02070 R 2257.11.322022RMF, 1%, 02070 R 2357.99.020650RPTC, 25V, 0.5W0 R 2457.99.020650RPTC, 25V, 0.5W0 R 2557.99.020650RPTC, 25V, 0.5W0 R 2657.11.3391390RMF, 1%, 02070 T 11.02
24、2.218.001 : 1EINGANGSTRAFO 1 : 10 End of List Comments: (01) IC3, R16, R19 changed Date printed: 06.11.2006 Professional Audio System Components E22Date printed: 29.11.01 2.1.13 Relay Sub-Cards1.914.523/524/525/526 Audio signal routing or enabling/disabling of certain circuit sections is often effec
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- Studer 970 Service Manual Section 电路 原理图