Manual - 8500A Series Peak Power Meter - Giga-tronics

Operation
2.18 1018B Peak Power Meter Emulation
2.18.1 General
The Giga-tronics Model 1018, 1018A, and 1018B series of peak power meters were the predecessors to
the Model 8501A/8502A meters. This 1018 series was first produced in 1969, and has had several design
up-grades. In 1978 Pacific Measurements, Inc. (now known as the Giga-tronics Power Measurements
Division) added limited IEEE Bus capability to the 1018, but no provision was available for controlling
front panel states. Only the cursor delay, trigger or reset, and the taking of data was remotely controllable.
The purpose of the 1018B emulation mode is to provide a means for current users of the 1018B to
quickly adapt to using the 8501A/8502A meters in automatic systems. While perfect emulation is not
possible, the PPM can mimic certain operations of the 1018B. This emulation relates only to GPIB (IEEE
Bus) operations. That is, the ability to reset, trigger, alter the cursor delay, and take a power reading over
the bus. See Section 3.5 for detailed information on GPIB operations with the PPM.
Although software written for the 1018B series would not take advantage of many of the new features of
the PPM, the emulation capability can allow work to continue while new software is being written for the
PPM.
☛ NOTE: To use the 1018B software with the PPM in the 1018B Emulation Mode, the
software must be written so that the talk and listen addresses of the PPM are both the same.
For further information, see Section 3.5.
2.18.2 Initiating the 1018B Emulation Mode
To initiate the 1018B Emulation Mode, press [MENU] (8) [F2].
Thereafter, MENU (8) selects settings relating to the way in which the PPM will emulate the 1018B. See
the Menu-8 listing in Appendix B for a listing of available settings. To know which selections to make,
three questions must be answered regarding how the 1018B is presently being used on the IEEE Bus.
These are:
1. Is SRQ Enabled or Disabled?
2. Is the instrument set up to output data upon being talk-addressed (automatic trigger reset), or
does the instrument require a trigger reset (a GET or ? command) to take a data point?
The 1018B emulation is incompatible with the Ratio Mode, and once the routine is in the 1018B
Emulation Mode, the Fast Analog Output function cannot be accomplished. For further
information, see Section 3.5.
3. What is the Talk/Listen address? (they must be the same.)
Based on these questions, use MENU (8) to select the appropriate settings. Press [MENU] (6) [F3] to set
the PPM listen and talk addresses.
Once the above has been done, it should be possible to swap a Model 1018B with option 05 (GPIB) with
a Model 8501A or 8502A meter and continue operations.
To terminate the 1018B Emulation Mode, press [MENU] (10) [F2].
Manual No. 20790, Rev C, November 1998 2-47
Superceded by Revision D, March 2009