Tektronix 760A Analyzer
Manufacturer:
Model:
760A
Date:
Category:
Group:
Description:
Stereo Audio Monitor

Information

The 760A Stereo Audio Monitor is a simple yet accurate tool that the audio engineer can use to perform setup, monitoring, measuring, and troubleshooting tasks in the studio. There are two special versions of the 760A Stereo Audio Monitor: the 760D and the 760N, All three operate in exactly the same manner, but are set to use different scales for the Bar Graph displays. The display is set for a “Sound Stage” orientation when the 760A is shipped from the factory. This provides a display where monaural amplitudes are oriented on the vertical axis of the CRT. An alternate XY graticule is shipped as a standard accessory with the 760A, This graticule can be installed if you are familiar with or desire the display orientation provided by an XY monitor. Instructions for installing the XY graticule are found in SECTION 3 INSTALLATION. Automatic or manual gain control is front panel selectable. This feature allows flexible control of the pattern size over a wide range of input signal amplitudes. In the absence of an input signal, Z–Axis dimming prolongs CRT life. Bar Graph Three 100–segment LED bars indicate the levels of the left stereo channel, right stereo channel and a selectable third channel. The third bar can be set to display the levels of (L+R)/2, (LR)/2, or the rear–panel AUXILIARY input. Both (L+R)/2 and (LR)/2 are internally derived, and represent half the sum or difference of the input voltages ([VLVR] / 2). In this way when the left and right channels are balanced the sum will be displayed at that same level, while the difference will be displayed at “0”. The EXPAND SCALE control is a momentary contact front–panel push button, which greatly improves the accuracy of level setups. Pressing this button switches to the blue expanded scale which allows accurate setting of the signal level for alignment, as specified by broadcast authorities. For the 760A the alignment level is 8 dB. This level is labeled “TEST”, and is indicated by the “arrow head” scale marks. For the 760D the alignment level is –9 dB, indicated by the “arrow head” scale marks. The 760N alignment level is marked “TEST”, and is at 0 dB. In all cases, the normal scale lines up with the expanded scale at the alignment level. The PEAK HOLD control is a latching front–panel push button. Indicated peaks are displayed for approximately three seconds when this function is selected. Dynamic response characteristics for peak program meters The 760A 760D and 760N conform to the dynamic response characteristics of: 760A: EBU–3205, IEC 268–10, and IEEE Proposed PPM specification. 760D: DIN 45 406 760N: Nordic Technical Recommendation N9. Table 1–1 shows the peak bar indication when an isolated tone burst of a given duration is applied. The response shown is relative to the indication for a continuous tone of the same amplitude. The burst must contain at least 5 cycles, which requires a frequency of at least 10 kHz for the shortest bursts.

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Service and User Manual
Manual type:
Service and User Manual
Pages:
172
Size:
1.29 Mbytes (1356367 Bytes)
Language:
english
Revision:
Manual ID:
070-5992-05
Date:
Quality:
Electronic document, no scan, very well readable.
Upload date:
2019 09 13
MD5:
70f833f7ac5e11a076f2f1a28a71d202
Downloads:
1035

Information

This manual documents the Tektronix 760A.760D 760N/Stereo Audio Monitor and is intended for instrument operators and service technicians. Operators are assumed to be familiar with basic television terms and measurements. Qualified service technicians are also assumed to be familiar with television terms and measurements, and have moderate experience with analog and logic circuits. The manual is divided into two parts: Operator’s Information and Service Information. The Operators information is useful to both operators and service technicians. The Service Information is intended only for qualified service technichians. Features Operators Part The Operators part includes Sections 1 and 2. Section 1, Introduction and Specification, includes a general description of the instrument, followed by the Specifications. The Specifications include references to the corresponding Performance Check steps. Section 2, Operating Instructions, familiarizes the user with the front– and rear–panel controls, connectors, and indicators; includes operator familiarization information. Service Part The Service part contains information required by service technicians to install, calibrate, maintain, and troubleshoot the instrument. This is included in the remaining sections of the manual. Section 3, Installation, includes electrical and mechanical installation information. The electrical installation information includes operational changes available within the instrument. Section 4, Maintenance, includes preventive troubleshooting and corrective information. Section 5 Performance Check and Calibration Procedures, includes information to verify and restore the instrument to meet its specifications. The procedures are preceded by list of recommended test equipment. Section 6, Theory of Operation, provides an overall block diagram and detailed circuit descriptions. The detailed circuit descriptions should be used with the block diagram and schematic diagrams in the foldout pages for specific information about the individual circuits. Section 7, Options, documents available instrument options. Section 8, Replaceable Electrical Parts List, includes order information and part numbers for all rep,aceable electrical parts. Section 9, Diagrams, contains servicing illustrations. These include adjsutment locations, circuit board part locations, a block diagram, schematic diagrams, and waveforms. Parts locating tables are included that cross–reference the circuit board illustrations and the schematic diagrams. Section 10, Replaceable Mechanical Parts List, includes ordering information and part numbers for all replaceable mechanical aprts. This parts list is referenced to an exploded view mechanical drawing. Also included are lists of standard and optional Accessories.

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