Programmed Test Sources Inc. PTS 310 Interface
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The GPIB Interface section consists of the SEC-1065 (Serial Control) and SER-1066 (Serial Register) modules. These modules provide the necessary hardware and control logic to remotely program an instrument via the GPIB (General Purpose Interface Bus) in accordance with the ANSI/IEEE Std 488.1-1987. The SEC and SER modules are unique and may not be interchanged with any other modules in the instrument. The two modules are piggy-backed and interconnected through a connector. Together, the boards are mechanically fastened to the instrument rear panel by four screws. The SEC module faces to the rear and contains a standard 24-pin GPIB connector and a six-position DIP switch for address and listen-mode selection. The SER module connects internally to the rest of the instrument through two header strips: one for frequency and amplitude control, and a second for phase rotation control. Functional Overview The basic data transfer on the GPIB is bit parallel, byte serial (one byte at a time), under the direction of a GPIB controller. The user typically provides the controller with information on the address of an instrument to be controlled, and any instrument-specific (also called devicedependent) instructions. The controller (or control program) will then generate a string of characters containing the ASCII codes for addressing the instrument and performing the instrument-specific function, and transmit these in conformance with the IEEE 488 timing and handshaking specifications. A PTS Synthesizer equipped with the GPIB Interface acts as a basic listener device. The standard LISTEN ONLY and ADDRESSED modes of operation are supported. In the LISTEN ONLY mode, all valid commands are accepted without regard to device address; in the ADDRESSED mode, only commands preceded by the instrument's selectable address are executed. In addition to LOCAL/REMOTE mode control, PTS's GPIB Interface has the capability to perform three synthesizer-specific (or device-dependent) functions through appropriate commands issued over the GPIB: setting the output frequency, setting the output signal level, and setting phase rotation (for instruments equipped with a phase-rotation option).
Service and User Manual
3.42 Mbytes (3589281 Bytes)
01 January 1988
Scanned document, all readable.
29 January 2017
GPIB Interface Description Condensed Programming Instructions ... ii Introduction ... 1 Functional Overview ... 1 Specifications ... 2 IEEE 488 Interface Function Capability Code ... 2 IEEE 488 Connector Pin Assignments ... 2 Installation ... 3 Setting the Listen Mode ... 3 Setting the Listen Address ... 3 Figure 1: Six -position Listen Mode and Address Selection DIP Switch ... 3 Table 1: Listen Address Switch Settings ... 4 Operation ... 5 Overview ... 5 Initialization ... 5 Programming Instrument Functions ... 6 Table 2: Common ASCII Codes ... 7 GPIB Data Rate and Instrument Switching Time ... 8 Phase Rotation Programming ... 9 Type 1 Instruments without Optional Phase Rotation ... 9 Type 1 Instruments with Optional Phase Rotation ... 9 Type 2 Instruments with Optional Phase Rotation ... 9 Table 3: Phase Rotation Programming ... 10 Programming Examples ... 11 Service ... 13 Maintenance ... 13 Troubleshooting ... 13 Parts Lists ... 14 Table 1: Listen Address Switch Settings ... 4 Table 2: Common ASCII Codes ... 7 Table 3: Phase Rotation Programming ... 10 Figure 1: Six -position Listen Mode and Address Selection DIP Switch ... 3 Figure 2: SEC 1065 Schematic ... 18 Figure 3: SER 1066 Schematic ... 19
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