2-20 Primary-Secondary Operation Commands Programming with GPIB Commands
2-58 PN: 10370-10374 Rev. F MG369xC GPIB PM
2-20 Primary-Secondary Operation Commands
Table 2-21 lists the primary-secondary operation command mnemonic codes. These commands provide for
enabling two instruments that are connected in a primary-secondary configuration to produce CW and
synchronized, swept output signals at a frequency offset.
In a primary-secondary configuration, one instrument (the Primary) controls the other (the Secondary) via
interface cables between their rear panel AUX I/O and SERIAL I/O connectors. The two units are phase-locked
together by connecting them to the same 10 MHz reference time base. (Refer to the MG369xC Operation
Manual, Chapter 7—Use With Other Instruments, for primary-secondary interconnection and operating
instructions. )
The parameter entry commands, SLF0-SLF9 and SLM0-SLM9, are used to set the F0-F9 and M0-M9
frequencies for the Secondary unit; the SLDF parameter entry command is used to set the F parameter for the
Secondary unit. The main output power level (L1) for the Secondary unit is set using the SLV or SLL1
parameter entry command; the alternate sweep power level (L2) for the Secondary unit is set using the SLL2
parameter entry command. The S1 command turns on the primary-secondary mode of operation; the S0
command turns off the primary-secondary mode of operation.
Programming Example:
Programming “SLF1 5 GH SLF2 8 GH SLL1 3 DM S1” sets the Secondary unit F1 frequency to 5 GHz, its
F2 frequency to 8 GHz, and its output power level to 3 dBm and turns on the primary-secondary mode of
operation. Now, when the Primary unit is programmed to perform a F1 to F2 sweep, the Secondary unit will
produce a synchronous 5 GHz to 8 GHz frequency sweep that has an output power level of 3 dBm.
Programming Note:
Use the SOF parameter entry command only to set the frequency offset for a Secondary unit that is (1)
Secondary to a Primary unit that is connected to a 360B VNA in a source or dual-source configuration or (2)
Secondary to a Primary unit that is programmed to perform non-sequential frequency step sweeps (refer to
“Special Step Sweep” on page 2-18).
Table 2-21. Primary-Secondary Operation Commands
Mnemonic Code Function
S0 Turns off the Primary-Secondary mode of operation.
S1 Turns on the Primary-Secondary mode of operation.
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