Tektronix 7B90P Generator
Manufacturer:
Model:
7B90P
Date:
1978
Category:
Group:
Description:
Programmable Time Base

Information

The Tektronix 7B90P Programmable Time Base provides calibrated sweep rates for Tektronix 7000-Series programmable mainframes. The 7B90P may be inserted in any 7000-Series mainframe without damage, but is recommended for use only in a programmable mainframe. The 7B90P has calibrated sweep rates ranging from 500 picoseconds/ division to 500 milliseconds/division. Other operating features that can be selected are: normal or automatic triggering, high or low frequency roll-off (attenuation) of the triggering signal, variable trigger hold-off, internal or external triggering, 1X or 10X sweep magnification, and repetitive or single-sweep mode. The 7B90P has readout encoding capability. Thus, horizontal scale factors can be displayed on a programmable mainframe having readout display capability. All functions of the 7B90P can be remotely programmed except for the Sweep Calibration (SWP CAL) adjustment and the External Trigger Input Termination (TERM) switch. The status of each programmable function can be set or read by commands sent over the IEEE 488 bus. These commands can be sent in either a high-level or low-level language, Doth of which are decoded by a microprocessor in the 7B90P,

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Service and User Manual
Manual type:
Service and User Manual
Pages:
230
Size:
56.78 Mbytes (59538827 Bytes)
Language:
english
Revision:
revised
Manual-ID:
070-2309-00
Date:
01 September 1984
Quality:
Scanned document, all readable.
Upload date:
23 April 2017
MD5:
0b8c30d2b76a224fe9bcb153b4b835d6
Downloads:
985

Information

PREFACE This manual contains two main divisions: operation and service. These divisions are separated by a heavy divider page. Information following this divider sheet is intended for qualified service personnel only. The first division (operator's portion) begins with an introductory section that briefly describes the 7B90P Programmable Time Base. Specifications and programmable features of the Plug-In are also listed. Section 2 describes each of the front-panel controls and connectors, and gives complete instructions for manual operation of the Plug-In. Measuring techniques and applications are also discussed in Section 2. The last section of the operator's portion describes programmable operation of the 7B90P via the IEEE 488 Interface Bus, also known as the General Purpose Interface Bus (GPIB).* A complete list of device mnemonics is provided in this section. The second division of the manual (service portion) begins with a section on preventive and corrective maintenance. Included in this section are some general troubleshooting procedures. Section 5 then provides a detailed circuit description of both the analog and digital portions of the 7B90P. Section 6 is a calibration procedure; it lists the equipment needed, and the steps required, for calibrating the instrument within specified limits. The remaining three sections provide electrical parts lists, schematic diagrams, and mechanical parts lists. At the back of the manual is a removable sheet which serves as a pocket programming aid. It lists all of the high-level mnemonic codes and low-level hexadecimal codes for exercising programmable control of the 7B90P Programmable Time Base.

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