crestgtxman11-3-97电路图.pdf

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1、CENTURYSERIES OWNERSMANUAL GTx RadioFans.CN 收音机爱 好者资料库 Congratulations on your purchase of a Century Series console. All of us at Crest Audio in Paramus, New Jersey, USA, support your decision, knowing your console contains the finest combination of design and manufacture in the industry. While your

2、 new Century Series console is one of the most feature-packed available, great effort has been put into making it simple to operate. This manual explains the functions of your new console, how they operate and how they relate to each other. If properly cared for, your new console will provide you wi

3、th trouble-free, sonically accurate mixing clear into the next Century and beyond. Please keep the following contact information on hand: Crest Audio Customer Service Dept. 100 Eisenhower Drive Paramus NJ 07652 USA TEL201.909.8700 FAX201.909.8744 Crest Audio Inc. 100 Eisenhower Dr., Paramus NJ 07652

4、 USA TEL: 201.909.8700 FAX: 201.909.8744 Printed in USA RadioFans.CN 收音机爱 好者资料库 PAGE1 Feature Overview2 A brief description of the Vx design, features and functions. Wiring Conventions3 Contains diagrams indicating how connectors for Crest consoles are wired. Rear Panel Connections4 Details the rear

5、 panel input and output connections to be made to the GTx console. Power Supply6 A brief description of the rack-mountable Century Series consoles power supply. Power Connections7 A brief description of Crest console power connections. Console Cooling7 A brief description of the dual-fan cooling set

6、up. System Connections8 Contains diagrams illustrating conventional system connections. Input Module10 Profiles the GTx input module. The module is illustrated and described. Stereo Input Module12 Profiles the GTx stereo input module. The module is illustrated and described. Group Modules15 Profiles

7、 the GTx group module. The module is illustrated and described. Matrix Module17 Profiles the GTx matrix module. The module is illustrated and described. Master Section19 Profiles the GTx master section. Modules are illustrated and described. Meter Bridge21 This section profiles the GTx meter bridge.

8、 Technical InformationAppendix A Includes dimensions, specifications, console access details, user options, console block diagram, and rear panel layout. GlossaryAppendix B The specific details of console operation are described here. SchematicsAppendix C Lists available schematics for all GTx Conso

9、le Modules the outer knob con- trols the center frequency. Center frequencies are indicated around the outer knob. PEAK/SHELVE HF Switch Used for switching the high frequency EQ between the nor- mal shelving setting to a peak setting. SWITCHABLE Q on HI MID and LO MID EQ Q is switchable between .8 (

10、switch up) and 1.8 (switch down). PEAK/SHELVE LF Switch Used for switching the low frequency EQ between the nor- mal shelving setting to a peak setting. PRE PRE PRE AUX 8 DIRECT 5 6 7 8 PAN AUX SENDS 7 8 9 5 2 0 1 3 46 10 7 8 9 5 2 0 1 3 46 10 7 8 9 5 2 0 1 3 46 10 7 8 9 5 2 0 1 3 46 10 7 8 9 5 2 0

11、1 3 46 10 7 8 9 5 2 0 1 3 46 10 100 40 200 4 6 800 PEAK HPF EQ IN HM LM HF LF GAIN 40 30 20 50 70 3 1.5K 8 15 20K 40 20 80 150 300 400 PAD LINE +48V Q 2 100 4 1K 2K 6 1K 400 2 4 6 8K 6 INSERT PEAK Q 1 2 3 4 PRE PRE PRE AUX 8 DIRECT MUTE PFL SCENE MUTE SELECT A - D 5 6 7 8 PAN AUX SENDS SAFE 7 8 9 5

12、2 0 1 3 46 10 7 8 9 5 2 0 1 3 46 10 7 8 9 5 2 0 1 3 46 10 7 8 9 5 2 0 1 3 46 10 7 8 9 2 0 1 3 10 7 8 9 5 2 0 1 3 46 10 L C R LR 1 3 5 7 M P A N 2 4 6 8 PK +8 0 -6 SIG 10 0 5 10 20 30 5 15 3 4 GTX PAGE11 CENTURYSERIES EQ IN Switch Inserts the EQ section into the input channel (post insert, pre fader)

13、. An associated green LED illuminates when the switch is down. AUX SENDS 1 pre-EQ, post-EQ, and post-fader. 100mm Fader Used for control of all outputs of the channel except those Aux output sections selected by the PRE/POST switch to a pre- fader position. (The Insert output level is not affected b

14、y the fader position.) Scene Mute Assignment Buttons Assigns input channels to any of the four Scene Mute groups. Scene Mute combines with the modules local Mute button, and actuates the local Mute LED. Scene Mute Safe Switch Disables any selected Scene Mute assignments. An associated green LED indi

15、cates the channel is in a Safe state. GTX PAGE12 CENTURYSERIES GTx Stereo Input Module The GTx Stereo Input module is essentially two GTx Input modules packaged to fit into a one-module space. This mod- ule is very useful for accepting remote feeds, effects outputs and other signals that require ste

16、reo handling. 48V Phantom Power Switch Applies 48 Volts DC to pins 2 while the lower knob controls the center frequency adjusted by the inner knob. Center frequencies are indicated around the lower knob. EQ IN Switch Inserts the EQ section into both L and R input channel sig- nals at once. An associ

17、ated green LED illuminates when the switch is down. AUX Level 1 pre-EQ, post-EQ, and post-fader. 100mm Fader Used for control of all outputs of the channel except those Aux output sections selected by switch to a pre-fader position. (The Insert output level is not affected by the fader position.) Sc

18、ene Mute Assignments Assign the input channel to any of the four Scene Mute groups. Scene Mute combines with the modules local Mute button, and actuates the local Mute LED. Scene Mute Safe Switch Disables any selected Scene Mute assignments. An associated green LED indicates the channel is in a Safe

19、 state. GTX PAGE14 CENTURYSERIES EFX RETURN 1616 88 O+ HF GROUP MATRIX PAN L C R LR 1 3 5 7 M P A N 2 4 6 8 PFL PEAK SIG MUTE LEV 7 8 9 5 2 0 1 3 46 10 PAN EFFECTS ASSIGNMENT 7 8 9 5 2 0 1 3 46 10 3 4 56 PRE 78 7 8 9 5 2 0 1 3 46 10 1 2 1616 88 LF O+ GAIN A B 7 8 9 5 2 0 1 3 46 10 7 8 9 5 2 0 1 3 46

20、 10 7 8 9 5 2 0 1 3 46 10 MUTE PFL SCENE MUTE EFX RETURN A - D EFX RETURN SAFE 10 0 5 10 20 30 5 15 PEAK SIG Fader Reverse Matrix Post L-R LCR MONO PAN L C R LR 1 3 5 7 M P A N 2 4 6 8 PFL PEAK SIG MUTE LEV 7 8 9 5 2 0 1 3 46 10 PAN EFFECTS ASSIGNMENT 7 8 9 2 0 1 3 10 GTX PAGE15 CENTURYSERIES GTx Gr

21、oup Modules The Group Module is where input signals are combined and configured for grouped output; effects one becomes the other. Group PFL Allows for Pre-fader Listening of the Group signal. Group Peak if one button is pressed, only one of them is moni- tored. Scene Mute Master Switches Turn on an

22、d off the four Scene Mutes. Aux Scene Mute On/Off Switch Turns the Aux Scene Mute system on and off. L/R/Mono Mute Switches Mute outputs of Left, Right and Mono signals respectively. GTX PAGE20 CENTURYSERIES L using both inputs at once is not recommended. Note: the inter- nal jumper default for this

23、 input is +48V DC! External Talkback Input Switch Located in the Talkback Control section (Master Section), this switch disconnects the two regular talkback microphone inputs and switches on the external talkback input XLR found on the rear panel of the GTx master section. Note: the Talkback Control

24、 Button must be on for this switch to function. External Talkback Output Switch Located in the Talkback Control section (Master Section), this switch activates the external talkback output XLR. The signal fed to the connector is the same signal being sent to the talk- back assignments. Note: the Tal

25、kback Control Button must be on for this switch to function. Fader The fader is used for primary level control of the channel, except those Aux output sections selected to a pre-fader posi- tion. (The Insert send level is not affected by the fader posi- tion.) Optimum noise performance is achieved w

26、hen the fader is operated near the 0 fader position, with pad switches and all gain controls properly set. This does not mean that all channels should be set at 0. Proper mixing requires varying of at least some of the faders. The 0 point should be considered a refer- ence, with all volume changes t

27、aking place between the -10 and +10 reference points at normal desired levels. For effect, faders may be operated below this level, provided no faders within the group or master section are increased in level to compensate for the inputs lower fader setting. (See also FADER REVERSE SWITCH). APPENDIX

28、B GTX CENTURYSERIES Fader Reverse Switch This switch swaps roles between the Effect Return Level pot and the Group Fader. When pressed, this switch causes the Effect Return Level to be controlled by the group fader, and the group level to be controlled by the Effect Return Level pot. If you want fad

29、er control when setting effect returns, this switch is particularly helpful. A red LED indicator is provided to the left of the switch and illuminates when the switch is pressed (reverse mode). Gain Control This knob (-20 to 70 dB) adjusts input gain circuitry for proper electrical operation with an

30、y input signal level. Adjust this control by monitoring the input meter LEDs for bright intensi- ty, with peak (red) LED flashing only occasionally when the loudest program material is present. When using this method for adjustment of the Gain Control, normal signal level should be adjusted to show

31、a level between -6 and +8. Constant distor- tion on an input channel could mean that the input channel is being overdriven. Check for improper input gain adjustment first. (When a PFL switch is pressed on an input channel, this signal can also be observed on the Left/Right Solo monitor meters within

32、 the GTx meter bridge.) Ground Console chassis and audio ground are connected together. The console power supply includes an external link that connects console ground to AC power ground. This link is provided for user selection when optimising system ground requirements. Group Assignment (See Bus A

33、ssignment) Group Insert Send/Balanced Insert Return Jacks (Group Module) These jacks allow you to access a point in the group modules electrical circuit for inserting an external signal processor. The output level of this connector is designed to drive the inputs of most external signal processing e

34、quipment and to accept the resulting output signal. When properly wired TRS plugs are inserted in these jacks, the patched devices are inserted into the signal path immediately pre-fader. See the Connections and Conventions section in the front of the manual for specific information on plug polarity

35、 and signal assignments. Group Meters 1-8 Located within the meter bridge, these VU-type meters moni- tor the post-fader output of the groups. Similar meters on the Master Section monitor Left, Center (Mono) and Right out- puts. 0 Level = +4dBu output level. Headphone Jacks Located at the top of the

36、 master section and under the right side of the arm rest, these jacks provide a stereo headphone level output of the Left, Center (Mono), and Right outputs. When L-C-R panning is enabled, the Center Bus will not be audible in the headphones; the Center Bus must be PFLd to monitor it audibly. Headpho

37、ne Level Control This control (marked PHONES and located in the upper right Master section) adjusts the level of the signal fed to the two headphone jacks; one of these jacks is located next to the PHONES control, and another is just below the armrest on the far right side. HF Peak/Shelve Switch Thi

38、s switch is used for switching the high frequency EQ con- trol between the normal shelving setting to a peak setting. A shelving setting would be used to boost or cut all frequencies above the dialed-in frequency. A peak setting would be used to boost or cut the specific dialed-in frequency. High Pa

39、ss Filter (Adjustable) See ADJUSTABLE HIGH PASS FILTER Insert Send/Balanced Insert Return Jacks (Input Module) These jacks allow you to access a point in the channels elec- trical circuit for inserting an external signal processor. The out- put level of the Insert Send jack is designed to drive the

40、inputs of most external signal processing equipment and to accept the resulting output signal. When a properly wired TRS plug is inserted in these jacks and the Insert switch is down, the input signal path is broken after the gain stage and the high pass fil- ter. The Balanced Insert Return jack fee

41、ds the return signal to a point just before the EQ section. See the Connections and Conventions section in the front of the manual for specific information on plug polarity and signal assignments. (With the Insert switch down, the insert return jack may be used as a line level input to the channel t

42、hat bypasses the mic preamp, mic/line switch, pad, gain control, and hi pass filter.) Insert Switch w/LED This switch, located on the GTX Input (and GTX Stereo Input) modules, introduces into the signal path any processing that is patched into the Insert Send and Balanced Insert Return jacks on the

43、rear panel. An associated green LED is illuminated when the Insert switch is down. Internal Oscillator The GTx master section has a 1 kHz internal oscillator. This oscillator can be used as signal source to run tests, diagnostics or calibrations. The oscillator can be assigned to all Groups, Auxes a

44、nd Matrices via the Talkback assignment switches. Lamp Dim Control This control adjusts the brightness of whatever lighting devices are plugged into the XLR sockets on the meter bridge. (Standard 12V DC power is provided on pins 2 operation with channel and output levels below -10 is not recommended

45、 - headroom is wasted at the expense of sig- nal-to-noise ratio. The solo L - R meter pair shows the PFL or AFL level of the selected source. When no PFL or AFL is selected, the headphone and monitor output is the main stereo output. The solo meter is inactive when no PFL or AFL is selected. For GTx

46、 Level Meter calibration information, consult the GTx Service Manual or your Crest Audio dealer/service center. (The range of meter adjustment is approximately +1 /- 1dB.) Mono Bus Assign Switch Assigns signal directly to the Mono (Center) bus. This signal is unaffected by the position of the Pan Co

47、ntrol, unless L-C-R panning is enabled. (See BUS ASSIGNMENT for more L-C-R information). This is useful when it is necessary to add input signal to the Mono mix without going through the Stereo sec- tion of the mixer. (An example would be a center vocal cluster configuration). In addition to the man

48、y mono output uses, this output could be used as an additional send. Mute Switch Turns off all send/output functions (except insert send) of the associated module including those being used as monitors. This switch does not affect the PFL switch or the LED indica- tors, enabling monitoring of input

49、channel activity regardless of mute switch position. The mute LED illuminates when the channel is muted, either from the local mute switch or from any activated mute group. When muting a group, the group meter (on the meter bridge) level will reflect the muting. Note: the Mute switch may not affect pre signals, depending on inter- nal jumper settings. Refer to User Options. Oscillator/Pink In Connector This connector accepts a balanced or unbalanced signal from an oscillator or pink noise generator. This signal is assignable via the talkback assignment switches. Plugging into th