Anritsu ML2430A operation manual Gpib Emulation Modes, 11GPIB Emulation, Zeroing a Sensor

GPIB OPERATION GPIB EMULATION MODES

6-11GPIB EMULATION	The ML2430 Anritsu power meter emulates the GPIB communication of other
MODES	power meters. The emulation mode can be set through the front panel
	SYSTEMmoremoreRear panelGPIBMODE menu (see Chapter 4, Operation)
	or through the GPIB command EMUL (page 6-86). The available emulation
	modes and command restrictions are:
	Power Meter	Command Restrictions
	Hewlett-Packard HP 436	All commands supported.
	Hewlett-Packard HP 437	Commands not supported : DN, DU, ERR?,
		LP, LT, SP, UP and @2.
	Hewlett-Packard HP 438	Commands not supported : DO, LP1 and
		LP2.
	Anritsu ML4803	Commands not supported : PCT, VSW,
		RDB, DBV50, DBV75, VLT50 & VLT75.
	In some cases, there are differences between the ML2430A in emulation mode
	and the actual meter being emulated. These differences are presented in the fol-
	lowing sections.
Zeroing a Sensor	The time taken for an ML2430 to complete the ZEROing sequence for a sensor
	differs from the time taken by the emulated power meters. Any GPIB control pro-
	grams that ZERO the power meter will have no problems with this time difference
	if the defined ZEROing controls and/or sequences for the device being emulated
	are followed.

￿The HP 436 uses the 'Z1T' AUTO ZERO sequence described in the HP 436 manual.

￿The HP 437 and HP 438 use bit 1 of the status byte to indicate ZERO or CAL completion.

￿The ML4803 uses bit 0 of the status byte to indicate that the ZERO sequence is not complete.

Sensor Ranges The sensor operating ranges for the ML2430 power meters are different from those of the meters being emulated. Refer to the specific range information for range commands in each emulation section.

Output Format In the HP 437 and HP 438, the format of the readings agrees with the format specified in the manuals, which may differ from the output from some HP437 and HP 438's.

For example: –14.236 may be output by the HP437 or HP 438 as '–14.236e00' or '–1.4236e+01'. The ML2430A in HP 437 or HP 438 emulation modes will output as the manual specifies '–1.4236e+01'.

ML2430A OM 6-83