Agilent Technologies 2712A, 2948 manual Instrument Modifications, Titled Hardware Modifications

Instrument Changes Model 8904A

To retrofit Option 006 (balance output), order HP 11837A from your local Hewlett-Packard Sales office. Only instruments with serial prefix 2948A and above can be retrofit with this option. The added balanced output will replace one of the outputs already in the instrument if it has Option 002 (second internal synthesizer and output). If the instrument has Option 004 (front-panel connectors moved to rear panel), the rear-panel connectors will need to be moved to the front panel.

7-3. INSTRUMENT MODIFICATIONS

Instrument modifications include firmware updates and hardware modifications. For information on firmware updates refer to the following table and to the section titled Firmware Updates.

	~
Serial Prefix	Revision Code	Firmware History
~	~~	~~
2732A and below	20987A	The first two editions of firmware had several problems and were incomplete,
	and	though useable. It is recommended that all instruments be upgraded to
	22987A	Revision 22987A with HP 08904-87010 as A2U12*.
2737A to 2942A	22987A	Problems noted in the previous firmware revision were fixed. However, the
		following problem has been noted: When used with HP-IB controllers which
		process HP-IB commands very fast, the instrument may hang up the HP-IB
		when the instrument is a talker. This problem can be corrected by upgrading
		to Revision 22987A with HP 08904-87010 as A2U12'.
2948A and above	27887A	Problems noted in the previous firmware revisions were fixed. Programs for
		operating Options 005 and 006 were added. Two enhancements were added
		to Option 001: Hop RAM sequencing and FM stereo. A physical re-design
		of the controller was made which does not permit this added firmware to be
		retrofitted into older instruments.

'Two revisionsof firmware share the same revision code: 22987A. The older revision has part number HP 08904-87007for ROM A2U12; the newer revision has part number HP 08904-87010.

For information on recommended hardware modifications refer to the followingtable and to the section

titled Hardware Modifications.

Serial Prefix	Nature of Modification
2737A and below	Modificationfor possible ground wire shock hazard.
2747A and below	Modificationfor output overvoltage protection improvement.
2817A and below	Modification for potential power supply short.
2917A and below	Modificationfor front panel assembly.

7-2 rev.15DEC89