Parity Inhibit; Parity Selection (Odd/Even); Parity Generation (Mark/Space); Word Length Selection - Beehive International B150 Series Operator's Manual

To protect operating personnel, these units are
equipped with a three-conductor shielded power
cable that grounds the unit. The units shou:j be
operated only with this or a similar type grounded
power cable. To temporarily operate the B 150
series from a two-corductor outlet, use a three-
conductor to two-conductor adapter. Preserve
the safety feature by grounding the adapter.
2.11 PC BOARD IVOUl\ITED CONTROL JUNPERS
A number of terminal controls are mounted on the
printed circuit board. These controls are referred
to elsewhere in this manual as strappable options
or controls. They are listed in Tables 2-2.
2.11.1
Parity Inhibit
With this strap installed, an odd or even parity bit
will be generated following the data in the serial
data word. If the strap is not installed, no odd or
even parity will be generated.
2.112 Parity Selection (Odd/Even)
With this strap installed, odd parity will be gener-
ated following the data. With this strap out, even
parity will be generated. This strap is active only
if the Parity Inhibited strap is installed.
2.113 Parity Generation (Mark/Space)
Mark or Space parity is generated by transmitting
an eight-bit data word and forcing the eighth bit
10 Bit Word With Parity '"Mark"
high or low. Therefore, if mark or space is desired,
the Word Length Control strap must be left out to
generate an eight-bit word (data). Then, if the
eighth bit control strap is installed, a spacing parity
bit is generated. If left out, the parity position will
mark. Note: The eighth bit control is only active
with
8
data bit word length.
2.11A Word Length Selection
A nine-bit transmission word can be generated by
sending one start bit, seven data bits, no parity bit,
and one stop bit. A 10-bit word is generated by
sending one start, seven data bits, one parity bit
(odd, even, mark. or space), and one stop bit. An
11-bit word has two stop bits (See Figure 2-4.).
2.11.5 Refresh Rate Selection
With this strap installed, the terminal functions at a
refresh rate of 50 Hz. With no strap installed, the
terminal functions at a standard 60 Hz vertical re-
fresh rate. With the strap set at 50 Hz and the power
commoning block configured to the proper power
strapping (see section 211.7) the terminal con-
forms to export requirements.
2.11.6
Auxiliary Baud Rate
This control has 15 switch locations to select one
of 15 baud rates normally provided for the Main
1/0 Port. Only one strap should be installed. This
baud rate will be enabled when the AUX ENABLE
key is depressed or when the AUX SEND key is
activated. (Continued
page 2-9)
>
!::
0::
..
. .
10 11
...
::
. .
10
.. ] ·
1,~
I ' I · I · I · I · I
~.1 ·
~
0::
<
,_
. .
9 Bit Word With No Partly
. .
0
!;
Figure 2-4 INPUT/OUTPUT Word Structure
2-7