HP 8642A Operation And Calibration Manual

Model 8642A/B
Operation
Operating Messages (cont'd)
NO RELATIVE F'REQ SWP .E32 4032
Relative values for frequency sweep are not possible Select only [-FATqJ or [ AMPTD J (liP-IE: FR or
AP) before attempting relative settings.
ONL Y FREQ/ AMPTD REL .E33 4033
No relative units are possible with the requested setting Select only ( FREQ J or ( AMPTD J (HP-IB: FR or
AP) before attempting relative settings
AP.REF DISALLOWS DBUV .E34
4034
An amplitude reference cannot be set in dBuV. Set amplitude to the desired value in dBuV, then select
I REL ZERO J (HP-IB: APRZ).
AP.SWP DISALLOWS DBUV .E35
4035
A n amplitude sweep ca TInot be directly set in dBu V. Convert t he desired dBu V setting value to absolute
units, then set the amplitude sweep in absolute units. (Refer to page 3-205 for amplitude units
conversion information.)
FM COlJPLED FUl\C LIMIT .E38
4038
FM is coupled with an attempted setting. You are either attempting a setting that is impossible or
attempting to set functions in an incorrect order. This message could also have been caused by executing
Special Function 0 or 100 when one special function was coupled to other instrument settings. Possibly
refer to the Sequence Dependency discussion that begins on page 3-12 in the HP--lB portion of this
Sect ion III
INT+EXT,FM PREVENT SP6 .E39
4039
Special Function 6 (FM Pre-Emphasis) cannot be selected when an internal source is summed with an
external source. Select a single FM source ( C!!51IJ, ( EXT AC J, [EXT DC J, or Special Function 5; HP-·IB:
FMNT, FMXA, FMXD, or SP5) before selecting FM Pre-Emphasis, 01' refer to the Sequence Dependency
discussion that begins on page 3-12 in the HP-IE portion of this Section III.
PM LIMITS MIN FREQ .E40 4040
The <PM setting limits the mmimum RF frequency value that can be selected. Either reduce <PM
devia hon, or select an RF frequency that allows the pM deviation, or refer to the Sequence Dependency
discussion that begins on page 3-12 in the HP-IB portion of this Section III.
PM LIMITS MAX FREQ
.E41
4041
The <PM setting limits the maximum RF frequency value that can be selected. EJther reduce ';'M
deviat.ion, or select an RF frequency that allows the <PM deviation, or refer to the Sequence Dependency
discussion that begins on page 3-12 in the HP-IB portion of this Section III.
FREQ LIMITS lVIAX PM .E42
4042
The RF frequency setting limits the maximum value of <PM deviation that can be selected, Set the RF
frequency to a value in a band that allows the desired value of <PM deviation, or select a <PM deviation
that is allowed ot the current Rfo frequency, or refer to the Sequence Dependency discussion that begins
on page 3-12 in the HP-IB portion of this Section III.
FR.SWP+AUTO LIMITATION .E45
4045
Stepped Frequency Sweep cannot sweep in the Auto sweep mode under the following conditions:
Setting start and stop end-points if one end-point is less than 4.130860 MHz with a second end-point
greater than 132.187500 MHz.
Setting a Stepped Frequency Sweep across 1057.500000 MHz (in the 8642B).
If neither of these restrictions apply to the attempted setting, refer to the Sequence Dependency discussion
that begins on page 3-12 in the HP-IB portion of tlllS Section III.
3-187

HP 8642A Specifications

General

Brand	HP
Model	8642A
Category	Inverter
Language	English