Advertisement
Installation
Model 11869A
Figure 2-5.
Installation (2 of 6)
3.
Setting the Modulation Select Switch
The Modulation Select Switch A2S1 selects the proper squarewave
modulation input signal for each Plug-In model depending on its
internal circuitry. Table 2-1 lists the settings of A2S1 for the
individual Plug-In models.
Table 2-1.
Modulation Select Switch Settings
Plug-In Model Humber
A2S1 Position
*8622QA
EXT
86222A/B
EXT
*86230B
EXT
86235A
EXT
86 240A/B/C
EXT
*86241A
EXT
*86242A
EXT
86242C/D
INT
86245A
INT
*86250A/B
EXT
86250C/D
INT
*8626GA/B/C
EXT
86290A/B/C
EXT
86290B H08
EXT
HOTE
* Plug-Ins marked with an asterisk
(*)
are
not compatible with 27.8 kHz internal
squarewave modulation. For
the HP 8755 Frequency Response Test Set the
front panel RF OUTPUT is modulated at 27.8
kHz with a model 11665B Modulator. The
modulation drive signal for the 11665B is
supplied by the 8755 MODULATOR DRIVE
output. The 8350.A squarewave modulation
function is disabled by the front panel
MOD key (light off). The externally
modulated output cannot be HP—IB
controlled.
Set the Modulation Select Switch to INT or EXT depending on the
model number of the Plug-In.
If the Plug-In is a factory-modified
Special, select the switch setting for the corresponding Standard
model of similar number.
2-6
Advertisement
