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(Function Select Commands) (contl
DATA TRANSFER MODE
Buffered. At turn
-on,
mand is accepted by the 3314A, it is executed. The next byte of HP-IB informa-
tion cannot be accepted until the previous command has been
cond mode loads up to 96 bytes of HP-IB data into a buffer. When the EOS (End
of String) character is received, the 3314A starts to process the commands in the
order they were received. The maximum data rate in the buffered mode is 3ms per
character.
DISPLAY ERRORS. All errors are displayed for about 1/2 second immediately after
they are
detected.
MANUAL
SWEEP.
however, the real importance of Manual Sweep is in the local operating mode.
Manual Sweep Frequency cannot be set via the HP-IB.
PLL MASK. Bit -5 of the Status Byte is maskable. Depending upon the mask, and
the state of the PLL (phase locked loop), bit 5 will be set (1) or reset (0). Before
bit # 5 will be set, both the Status Byte mask and the PLL mask must be set.
THE DATA MESSAGE
.
There are 2 HP-IB data transfer modes: Unbuffered and
the 3314A data transfer mode is unbuffered. As each com-
While they are displayed, no other programming can occur.
Manual Sweep can be turned ON and OFF via the HP-IB,
94
processed.
The
se-
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