HP 8642A Operating Manual page 202

Operation
Model 8642A/B
Operating Messages (cont'd)
Parameters Changed Messages
Local: These messages are automatically displayed except for C32 and C33.
HP-IB: All of these messages can be output via HP-IB using "OC".
Parameters Changed messages (message code is prefixed with "C") inform you that the Signal Generator
has changed some other setting to allow a new setting. Some of the Signal Generator's functions cannot
occur simultaneously with other functions, so the Parameters Changed message indicates the Signal
Generator has automatically adjusted or turned off the functions that are preventing the new setting.
These messages occur immediately after executing a command that causes some other parameter to
automatically change.
HP-IB: You can read only the first Parameters Changed message if more than one has occurred. For
example, assume that more than one Parameters Changed message has occurred since either the Status
Byte was cleared or since the last time "OC" was executed. Then reading a Parameters Changed message
using "OC" will enable you to read out only the first message.
FR.SWP+PULSE TURNED OFF C l
RF frequency sweep with pulse modulation was turned off. Either [ START
1 STOP AMPTD I was selected (HP-IB: AA or AB) when RF frequency sweep was on with pulse
modulation.
AMPTD REF SET TO 1.00UV C2 2002
Amplitude reference was set to 1.00 uV. The amplitude reference was set to the dBuV reference (which is
1.00 uV) due to the selection of dBuV (HP-IB: DU). Subsequent amplitude displays will be in dBuV.
ADJUSTED. 002UV RESOL'N C3 2003
Amplitude setting was adjusted to 0.002 uV resolution. In EMF mode, if an attempt is made to set an
increment or amplitude reference with an odd number of nanovolts (for example, 0.501, 0.503, 0.505 uV,
etc.), that value will be adjusted up to an even number of nanovolts.
INCR+AMPTD REF CHANGED C4 2004
The increment setting and amplitude reference were changed. Changing between EMF and n o n - E M F
amplitude modes could cause the increment and amplitude settings to be reset to allowable values.
AM TURNED OFF C l l
AM was turned off. Either [ START AMPTD1.
2011
or PULSE ( ( SHIFT 1 fMT\ ) was
selected (HP-IB codes: AA, AB, or PL) when AM was on. AM is not possible with pulse modulation or
ampliltude sweep.
FM TURNED OFF C12 2012
FM was turned off. 4>M was selected when FM was on. FM cannot be done simultaneously with $M.
PHASE MOD TURNED OFF C13 2013
•I'M was turned off. FM was selected when 4>M was on. $M cannot be done simultaneously with FM.
PULSE MOD TURNED OFF C14 2014
Pulse modulation was turned off. Either fSTART^AMPTDI. rsTDP~A7v!FTTJ"~l, or fJMl was selected
(HP-IB codes: AA, AB, or AM) when pulse modulation was on. Pulse modulation is not possible when
amplitude sweep or AM are on.
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