Operation Model 8642A/B
Operating Messages (cont'd)
BAD PREFIX RECEIVED .E18 4018
A bad prefix has been detected by the Signal Generator. Terminator keys do not have shift functions.
HP-IB:
The Signal Generator received a set of characters that cannot be recognized. Send a valid HP-IB
code or use the HP-IB Device Clear command and try again. (Refer to Clear, page 3-24, in the HP-IB
portion of this Section III.)
MAXIMUM OF 10 DIGITS E19
This message is never displayed locally.
HP-IB:
The Signal Generator ignored some digits in the entry.
leading zeros).
4019
Only send
1
0 digits (including significant
NUMBER OUT OF RANGE E20 4020
The attempted setting exceeds a numeric value which can be represented internally as a number. Select a
value within the Signal Generator's settable range.
AMPTD LIMITS MAX AM E24 4024
The amplitude setting limits the maximum AM setting. Reduce either the amplitude setting or the
attempted AM setting and try again. Refer to Table 3-18 (page 3-102) for information on setting
limitations due to amplitude, or refer to the Sequence Dependency discussion that begins on page 3-12 in
the HP-IB portion of this Section III.
AM LIMITS MAX AMPTD E25 4025
The AM setting limits the maximum amplitude setting. Reduce either the AM setting or the attempted
amplitude setting and try again. Refer to Table 3-18 (page 3-102) for information on setting limitations
due to amplitude, or refer to the Sequence Dependency discussion that begins on page 3-12 in the HP-IB
portion of this Section III.
ONLY INT/EXT.DC PULSE E26 4026
Only an internal or external dc source is possible with pulse modulation. With pulse modulation, select
only
1
INT I or fEXT DC I. For other modulation sources, select the modulation type of [ AM 1, [ FM 1, or
$M ( fSHIFT"! [~FM j ) before selecting the modulation source.
HP-IB:
Send only PLNT or PLXD, or ensure codes AM, FM, or PM are sent before XA, BA, or BD.
PULSE MOD ONLY OFF/ON E27 4027
Pulse modulation can only be off or on. Since pulse modulation can only be turned off or on, knob
rotation, cursor positioning keys , and Step keys cannot affect the pulse modulation function.
HP-IB:
Select a function code before UP, DN, KL, or KR.
AM PREVENTS PULSE MOD E28 4028
AM is not possible with pulse modulation. Turn off AM (HP-IB: AMOF) before selecting pulse
modulation.
PULSE MOD PREVENTS AM .E29 4029
Pulse modulation is not possible with AM. Turn off pulse modulation (HP-IB: PLOF) before selecting AM.
TURN OFF EMF FOR DBM E30
When in the EMF mode, dBm units are not possible.
4030
Turn off EMF before selecting dBm amplitude units.
NO RELATIVE AMPTD SWP E31 4031
Relative values for amplitude sweep cannot be set directly. Convert the desired relative setting value to
absolute units, then set the amplitude sweep in absolute units. (Refer to page 3-205 for amplitude units
conversion information.) Select only f FREQ I or fATOFTDn (HP-IB code FR or AP) before attempting
relative settings.
3-186
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