HP 8112A, Operating, Programming And Servicing Manual

Page: 82 / 406

Example
Timing
Data Transmission Time
Implementation Time
6-12 Programming
DIM B$ [153]
OUTPUT 712 ; "CST"
ENTER 712 ; 8$
PRINT "81 12A settings are : " ; 8$
Allocate memory for max­
imum reply length
Request current settings
of instrument
Read reply into allocated
memory
Print the reply.
The time taken for the HP 8 11 2A to receive and implement a
programming message can be divided into three parts:
Send
This is the time taken to transmit the programming message over the
HP-IB, which is 130 µs ms per ASCII character
(7.6
kByte / sec). The
system controller is free to continue with its program after this time.
Answer
This is the time taken by the HP 8 1 1 2Ato transmit a message when
error reporting or learn mode. Time is 1 ms per character, status
byte < 15 ms
This is the time taken by the HP81 12A to interpret and carry out all
the commands in received message. Typical implementation times
vary between
4
ms for select mode to 185 ms to recall a parameter
set. Typical implementation times for various commands are given in
the following table.
Table 6-1.
Co mman
d
(
s
)
hnplementation Without Excess
Time Slope calc.
Mode change
<
4 ms
Control modes
<
50 ms
Level
<
90 ms
Burst
<
12 ms
Timing (not in duty mode)
<
50 ms
<
25 ms
Duty cycle <
80 ms
<
50 ms
Period (DTY active) <
80 ms
<
50 ms
Store
6
ms
Recall 180 ms
1 50 ms
Norm/Compl
<
4 ms
Enable/Disable
<
4 ms
Limit
<
4 ms