HP 8642A Operating Manual page 205

Model 8 6 4 2 A / B
Operation
Operating Messages (cont'd)
SP6 PREVENTS INT+EXT.FM E7 4007
Special Function 6 (FM Pre-Emphasis On) prevents the selection of a summed internal and external FM
source. Select Special Function 206 (FM Pre-Emphasis Off) to select 1NT+ (EXT AC), INT+ (EXT DC), or
Special Function 112 (Internal + External Low Rate FM). Refer to Modulation, FM (page 3-113) for
more information.
HP-IB: Select SP206 before selecting FM source codes FMBA, FMBD, or SP11 2.
TURN.OFF.SWP FIRST..SP123 ,E8 4008
Turn off the frequency sweep before attempting those settings because Special Function 123 (Phase
Continuous Frequency Sweep) is the type of frequency sweep currently selected. (Refer to RF Frequency
Sweep, page 3-49, for more information.) Turn off either 1 START FREQ I or I STOP FREQ I and then
try your setting again.
HP-IB: Turn off the frequency sweep with FAOF or FBOF, then retry settings.
SP9+AM LIMIT MAX AMPTD E9 4009
Special Function 9 (Attenuator Range Hold) selected with the current AM setting limits amplitude levels
attainable according to Table 3-15 (refer to Amplitude, page 3-7 5). Turn off Attenuator Range Hold
(with Special Function 209) and/or reduce AM to a depth that will allow the amplitude setting, or refer
to Sequence Dependency which begins on page 3-1 2 in the HP-IB portion of this Section III.
FUNCTION OFF. NO STEP E10 4010
The active function is off so its value cannot be stepped. Turn on or set the active function to a valid
setting before using the Step keys.
FUNC DISALLOWS O F F / O N E l l 4011
The active function cannot be turned off or on. You attempted to turn off or turn on either [ FREQ 1.
I MOD FREQ I. or sweep TIME ( r s m F T I f START FREQ I ) (HP-IB codes FR, MF, or ST). Refer to
Modulation Oscillator, page 3-131 for a way to effectively turn off the internal modulation oscillator.
ONLY O F F / O N IS ACTIVE E12 4012
Only the f OFF ON 1 key can be selected. Select an active function other than PULSE ( [""SHIFT 1 ("AMI),
EMF ( rSHIFTl I INCR SET I ), or KNOB HOLD ( f SHIFT I G D ) before entering data.
HP-IB: Don't send data immediately after selecting PL, EM, or KH.
NO ACTIVE FUNCTION E13 4013
Currently no function is active. Select an active function and then try your setting again.
NOTHING TO BACKSPACE E14 4014
There is no data in the display to backspace. Select an active function before using [ BACK SP 1.
NO CURSOR TO MOVE E15 4015
Currently no function is active so no cursor can be moved. Select an active function to activate the Knob
before attempting to move cursors.
INVALID SHIFT FUNC E16 4016
The key you have selected cannot be preceded by the rsTUFT 1 key. Select a valid shift function.
HP-IB: Select the proper function code without SH. SH should only be used with the Display Output
capability or to get back the normal display of instrument settings (HP-IB code: SHSH). Refer to Output
Display information that begins on page 3-21 in the HP-IB portion of this Section III.
INVALID TERMINATOR E17 4017
This message is never displayed locally.
HP-IB: Invalid terminator received. Send correct terminator code for function you are trying to set.
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