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 O9.999
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:
9.999
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