TTI TF830-RS232 Manual De Instrucciones página 7

returns the display contents at the time the query is received. The N?
form waits for the measurement in progress to finish then returns the
display contents. The E? form is similar to the N? form except that the
display contents are returned after each measurement until any new
command is inserted into the input queue. In non-addressable mode the
responses are sent continuously. In addressable mode one response is
sent each time that the TF830 is addressed to talk. It is the 'address to
talk' which selects which is the 'measurement in progress' and hence
the reading returned is always as up to date as possible.
The format of the response is the same for all forms of the query and is
as follows:-
xNNNNN.NNNeSEuu<rmt>
where:-
x is the overflow digit (if zero a space is sent).
NN.NN is the displayed answer with the decimal point in the corre-
sponding position (9 characters).
e is the letter e for exponent.
S is a plus or minus sign indicating the sign of the exponent.
E is the exponent value to give the answer in Hz or seconds (1
character).
uu is the units specifier Hz or s_ or _ _. Each _ is a space (2
characters)
<rmt> is the terminator CR LF.
If there is nothing to measure and the display is zero the response will
be:-
_00000000.e+0_ _<rmt>
F<n> (6h 1h-7h) Function n.
Sets the measurement function to the number <n>. The functions are
numbered from 1 to 7 from left to right as they appear on the front panel.
Hence F1 will select PERIOD A, F2 will select FREQUENCY A etc. The
new function is selected immediately and a new measurement is started.
FI (6h 9h) Filter In (on).
FO (6h Fh) Filter Out (off).
6
Sets the low pass filter in or out. The filter is set irrespective of the position
of the front panel switch. When remote state is first entered the filter is
set to the state corresponding to the switch position. When remote state
is cleared the filter reverts to the setting of the front panel switch.
I? (9h Fh) Identify Query.
Responds with the instrument identifier. The response is sent immedi-
ately, if in non-addressable mode, or when addressed to talk, if in
addressable mode. The format of the response is:-
TF830<rmt>
L (Ch) Low frequency mode.
Sets the VLF mode as described in the Instruction Manual.
M<n> (Dh 1h-3h) Measurement Time n.
Selects the measurement time to the number <n>. The measurement
times are numbered from 1 to 3 from left to right as they appear on the
front panel. Hence M1 will select ⋅1s, M2 will select 1s and M3 will select
10s. The new measurement time is selected immediately and a new
measurement is started.
Remote Command Summary
R (2h) Reset.
S? (3h Fh) Status Query.
TC (4h 3h) Trigger level to centre position.
TN (4h Eh) Trigger level to negative pulse position.
TP (4h 0h) Trigger level to positive pulse position.
E? (5h Fh) Every Result Query.
N? (Eh Fh) Next Result Query.
? (Fh) Current Result Query.
F<n> (6h 1h-7h) Function n.
FI (6h 9h) Filter In (on).
FO (6h Fh) Filter Out (off).
I? (9h Fh) Identify Query.
L (Ch) Low frequency mode.
M<n> (Dh 1h-3h) Measurement Time n.
SPACE character (0h) No Operation.