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Note that all numeric variables can be expressed in integer, floating point or exponential formats (i.e., the number
five can be 5, 5.0, or .5E1). Strings are sent as a sequence of ASCII characters.
In addition, parameter i represents which channel is selected. ‘i=1’ indicates that channel A (CH-A) is selected.
‘i=2’ indicates that channel B (CH-B) is selected
4.2.1 Reference and Phase Commands
PHASD(?) i {,x}
The PHASD command sets or queries the reference phase shift. The parameter i
represents the selected channel (A or B). The parameter x refers to the phase (real
number, unit: °). The PHASD i x command will set the current phase shift of channel A
(i=1) or B (i=2) to x°.
The value of x is rounded to 0.01°. The value of phase shift can be set from -180° to
+180°. For example, send command ‘PHASD 1 -179.0’ and the phase shift of channel A
will be set to -179°. The PHASD? 1 command queries the phase shift of channel A.
FMODD(?)i {,j}
The FMOSD command sets or queries the reference source. The parameter i represents
the selected channel (A or B).The parameter j selects external reference (j=0), internal
reference (j=1) or internal sweep reference (j=2).
FREQD(?) i {,f}
The FREQD command sets or queries the reference signal. The parameter i represents the
selected channel (A or B). The parameter f represents frequency (unit:Hz).The FREQD?
1 command will return the current reference frequency of signal from channel A (internal
or external).
RSLPD(?) i {,j}
The RSLPD command sets or queries the trigger way of reference signal when in external
reference mode.
The parameter i represents the selected channel (A or B). The parameter j selects <TTL>
rising edge (j=0) or <Sine> zero crossing (j=1). When the frequency is less than 1 Hz, User
must use the <TTL> reference.
SWPTD(?) i {,j}
The SWPTD command sets or queries the mode of internal frequency sweep. The
parameter i represents the selected channel (A or B). The parameter j selects <Linear> (j=0)
or <Log> (j=1).
SLLMD(?) i {,f}
The SLLMD command sets or queries the <Start> frequency in internal frequency sweep
mode. The parameter i represents the selected channel (A or B). The parameter f indicates
the start frequency(unit:Hz). The SLLMD? 1 command will return the start frequency of
channel A. The range of f is 0-100kHz and the minimum resolution is 1mHz.
SULMD(?) i {,f}
The SULMD command sets or queries the <Stop> cutoff frequency in internal frequency
sweep mode. The parameter i represents the selected channel (A or B). The parameter f
indicates the stop frequency(unit:Hz).The sulmd? 1 command will return the cutoff
frequency of channel A. The range of f is 0-102 kHz and the minimum resolution is 1mHz.
SSLLD(?) i {,f}
The SSLLD command sets or queries the step frequency in <Linear> internal frequency
sweep mode. The parameter i represents the selected channel (A or B). The parameter f
