HP 8648 A/B/C/D - Changpuak.ch

The following table describes the prefixes that apply to the various HP
8648 models equipped with an LCD.
A. Liquid Crystal Display (LCD)
(labels located above the display)
BP 8648A BP 8648B BP 8648C BP 8648D
Prefix Preflx Prefix Prefix
3636A and below 3623A and below 3623A and below 3613A and below
3643U and below 3642U and below 3642U and below 3642U and below
The display contrast of the LCD can be achieved using the adjustment
that is located on the rear panel of these instruments. Note that this
adjustment is only available for instruments equipped with an LCD.
It allows you to adjust the contrast of the LCD. Turn the adjustment
to optimize the display for viewing from most angles. If the display is
blank, first attempt to adjust the display contrast before returning the
instrument for service.
The following table describes the prefixes that apply to the various HP
8648 models equipped with a VFD.
B. Vacuum Fluorescent Display (VFD)
(labels located below the display)
BP 8648A BP 8648B BP 8648C ElP 8648D
Prefix Prefix Prefix Prefix
3836A and above 3836A and above 3836A and above 3836A and above
3836U and above I 3836U and above I 3836U and above I3836U
and above
The VFD is a 2x40 display. The intensity of the this display is at 100
% and cannot be adjusted.
3. Function and Data The keys in the FUNCTION and DATA blocks allow you to enter
Keys values for setting the frequency, amplitude, and modulation level of
the RF output signal.
If Option 1EP is present, the [FM) (ENCODER) key will toggle between
pager encoder (ENCODER) mode and FM mode.
If Option 1EP is present and the signal generator is in the ENCODER
mode, the L-j key functions as a SHIFT key. This key lets you
input alphabetical characters using the DATA and MODULATION
SOURCE blocks when you are in pager encoder mode.
If Option 1EP is present and the signal generator is in the ENCODER
mode, the (jjdB(ml) key functions as an ENTER key. The ENTER
key must be used to store any numeric or alphabetic characters
entered by way of the DATA and MODULATION source blocks.
Operation 1-3