When however High-Speed dump is selected all calcula-
tions are left to the controller instead, and the counter can
concentrate on measuring at a rate of over 100 measure-
ments/second.
High-speed dump cannot be used for voltage measure-
ments nor for Totalize manually. MTCXO compensation is
not possible.
Starting
NOTE:
Allways make sure you have input signal and that
the input triggers correctly before turning on high-
speed dump! (See Stopping below).
If Triggered Mode is OFF When High-speed dump is pro-
grammed the counter will immediately start transmitting re-
sults, so the OUTM 4 command must always be placed at
the end of the program message.
If Triggered Mode is ON After receiving OUTM 4 the
counter waits for bus command GET before it starts.
NOTE:
The minimum time between OUTM 4 and GET is
70 ms.
Stopping
Any programming command from the controller will end High-
Speed dump. High-speed dump is stopped inbetween two
measurements. If you switch on high-speed dump without
having an input signal, the counter must be switched off/on to
regain control over the counter.
NOTE:
The Power-switch is the only front panel control that
will stop High-Speed dump, the LOCAL-button
will not have any effect.
Output Format
The output format will always be two letters followed by 12
hexadecimal digits. The two letters will tell the controller
how to evaluate the twelve hex-digits, which represent the
contents in the internal registers of the counter.
Formula
Multiplier
Hex-digits
Separators
*
FM111111222222S(S)
15(16) characters
*
The counter cannot signal EOI together with the out-
put separator when High-speed dump is selected.
Hex-digits
All 12 digits together represent register 3.
When the digits are divided into two groups, the first six
digits represents register 1 and the last six digits represent
register 2.
Formula
Depending on the selected measuring function
different calculations must be made to convert the register
contents to readable measuring results.
The first letter (F) in the output data indicates which for-
mula you must use.
If ‘F’=
Use this formula
C
F
G
I
J
K
Multiplier
The second letter (M) in the output data repre-
sents a multiplier which you must multiply the results by
before presenting it.
If ‘M’=
Multiply results by:
H
60
L
256
N
0.1
O
10
P
1
EXAMPLE 1:
The following HP-85 program sets up a High-Speed dump
Single-period measurement.
OUTPUT 710;"PER A,MTIME 0"
ENTER 710;A$
A$
PER
000001.667E–4
OUTPUT 710;OUTM 4
ENTER 710;A$
A$
JP000000000683
‘J’ means that you must use formula J which is:
Reg. 3
∗
10
−
7
111111222222 =
= 333333333333
MSB
L
S B
MSB L
S B
111111
222222
MSB
L
S B
Reg.
Reg.
2 10
1
7
×
Reg.3
Reg.
Reg.
2
10
1
7
×
Reg.1
Reg.
×
−
10
2
7
Reg.3 10
7
×
−
Reg.
Reg.
2 10
1
7
×
−
GPIB-INTERFACE OPERATION
Page: 31
PM 6666 - OPERATORS MANUAL
