HP 8642A Operation And Calibration Manual

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") mform 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 .C1 2001
RF frequency sweep with pulse modulation was turned off. Either (START AMPTD) or
esTOP 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
100 uV) due to the selection of dBuV (HP-IB: DlJ). 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, 050 I, 0.503, 0.50S uY,
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 non -EMF
amplitude modes could cause the increment and amplitude settings to be reset to allowable values
AM TURNED OFF .C11 2011
AM was turned off. Either ( START AMpTD ], ( STOP AMPTD I, or PULSE ( (JiliIFT J C6I2D ) was
selected
(HP-IB codes: AA, AB, or PL) when AM was on. AM is not possible with pulse modulation or
ampliltude sweep.
PM
TURNED OFF
.C12
2012
FM was turned off. <PM was selected when rM was on FM cannot be done simultaneously with <P\1.
PHASE MOD TURNED OFF .cu
2013
<PM was turned off. FM was select.ed when <PM was on <PM cannot be done simultaneously with FM .
PULSE MOD TURNED OFF
. C14
2014
Pulse modulation was turned off. Either [START AMPTD J, ( STOP AMPTD ), or ~ was ;,elected
(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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HP 8642A Specifications

General

Brand	HP
Model	8642A
Category	Inverter
Language	English