Output Format
Normal
When you select normal output format, the output will be
as follows:
Function command Header, 3-6 characters (same
Header as used for selecting the function).
O when overflow, otherwise space.
Measurement result, always 9 digits and
a decimal point. Same number of
significant digits as on the display of the
counter, leading zeroes fill out the rest of
the 9 positions. The leftmost digit can be
replaced by a (minus sign).
Separates the exponent from
the digits.
Exponent sign, + or -.
Exponent, one digit.
Output separator.
LF if CR+LF is selected
as output separator.
FFFFFFOXXXXXXXXXXE±XS(S)
21(22) characters
EXAMPLE:
Normal operation:
PER 000001.667E-4
Overflow:
PER O9.99999999E+9
Short
Short format means that function command and leading
zeros are not sent to the controller. When you select
short output format, the number of digits may vary de-
pending on the measurement result. The example below
shows a result with five significant digits:
Measurement result, same number of digits as
on the display of the counter; may vary
between 1 and 9 digits, plus decimal point. No
leading zeros are sent.
Same as for normal output format.
X.XXXXE±XS(S)
EXAMPLE:
Normal operation:
1.667E-4
Overflow:
9.99999999E+9
High-Speed Dump
The most time-consuming part of a measuring cycle is
calculating the result. The calculations limit the number
of possible results/second to about 5, even when the
Measuring-time is short.
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
measurements/second.
High-speed dump cannot be used for voltage measure-
ments nor for Totalize manually. MTCXO compensation
is not possible.
Starting
NOTE: Always 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 programmed the counter will
immediately start transmitting results, so the OUTM 4
command must always be placed at the end of the pro-
gram message.
If triggered mode is ON
After receiving OUTM 4 the counter waits for bus com-
mand 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 inbet-
ween two measzurements. 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-
key 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 control-
ler how to evaluate the twelve hex-digits, which repre-
sent 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.
Page: 28 GPIB-INTERFACE OPERATION
PM 6669 - OPERATORS MANUAL
To Next Page
Loading...
