Model 8642A/B
Operation
Operating Messages (cont'd)
3) refer to the Sequence Dependency discussion that begins on page 3-12 in the HP-IB portion of this
Section HI.
SP9 LIMITS MAX AMPTD E76 4076
Special Function 9 (Attenuator Range Hold) limits the maximum amplitude that can be selected. To
resolve this problem, either
1) select Attenuator Range Hold Off (Special Function 209), or
2) select an amplitude within the held amplitude range selected (refer to Table 3-15, page 3-75, or Figure
3-9, page 3-76), or
3) refer to the Sequence Dependency discussion that begins on page 3-12 in the HP-IB portion of this
Section III.
AMPTD+SP9 LIMIT MAX.AM E77 4077
The amplitude selected with Special Function 9 (Attenuator Range Hold) limits the maximum value of
AM that can be selected. To resolve this problem, either
1) select Attenuator Range Hold Off (Special Function 209), or
2) reduce the amplitude setting to get the desired AM setting, or
3) select an AM setting allowed with the held range and amplitude setting selected (refer to Table 3-15,
page 3-75, or Figure 3-9, page 3-76), or
4) refer to the Sequence Dependency discussion that begins on page 3-12 in the HP-IB portion of this
Section III.
SP9 PREVENTS PULSE JE78 4078
Pulse modulation is not possible when Special Function 9 (Attenuator Range Hold) is selected. Select
Attenuator Range Hold Off (Special Function 209) before selecting pulse modulation.
PULSE PREVENTS SP9 .E79 4079
Special Function 9 (Attenuator Range Hold) is not possible when pulse modulation is selected. Turn off
pulse modulation (HP-IB: PLOF) and set output amplitude (HP-IB: AP) to the desired level before
selecting attenuator range hold (HP-IB: SP9).
SP9 PREVENTS SP4 .E80 4080
Special Function 4 (ALC Off) is not possible when Special Function 9 (Attenuator Range Hold) is selected.
Select Attenuator Range Hold Off (Special Function 209) before selecting ALC off.
HP-IB:
Send SP209 before SP4.
SP4 PREVENTS SP9 .E81 4081
Special Function 9 (Attenuator Range Hold) is not possible when Special Function 4 (ALC Off) is selected.
Disable ALC Off (Special Function 204) before selecting attenuator range hold.
HP-IB:
Send SP204 before SP9.
AM PREVENTS SP4 .E82 4082
Special Function 4 (ALC Off) is not possible when AM is selected. Turn off AM before selecting ALC off.
HP-IB:
Send AMOF before SP4.
PULSE PREVENTS SP4 .E83 4083
Special Function 4 (ALC Off) is not possible when pulse modulation is selected. Turn off pulse
modulation before selecting ALC off.
HP-IB:
Send PLOF before SP4.
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