Stanford Research Systems DS360 Operating Manual And Programming Reference page 73

STFR (?) x
SPFR (?) x
RATE (?) x
BCNT (?) x
RCNT (?) i
DPTH (?) x
NBCT (?) x
i Source
0 INTERNAL
1 EXTERNAL
2 SINGLE
3 GATE (burst only)
If the trigger source is set to gate when the unit is in burst mode and the unit is
changed to sweep mode, the trigger source will change to internal.
The STFR (?) command sets (queries) the sweep start frequency to x Hertz. An
error will be generated if the start frequency is higher than the current stop
frequency.
The SPFR (?) command sets (queries) the sweep stop frequency to x Hertz. An
error will be generated if the stop frequency is lower than the current start
frequency.
The RATE command sets the sweep rate to x Hz. The value x is rounded to 2
significant digits and may range from 0.1 Hz to 3.1 kHz. The RATE? query
returns the sweep rate in Hertz.
The BCNT command sets the burst count to x (1 to 65534). The BCNT? query
returns the current burst count. The maximum value of x is limited to 1 less than
the value of RCNT (see below). If this is exceeded a range error will occur. The
burst count can also be set to .5, for a 1/2 cycle burst. The string ".5" must be
sent without a leading zero (do not send "0.5"!).
The RCNT command sets the burst rate count to i (1 to 65535). The RCNT?
query returns the current burst rate count. Setting RCNT less than or equal to the
current BCNT will adjust BCNT to RCNT-1 (to .5 if RCNT is 1). An "ADJ
BUR" message will be displayed and bit 3 (parameter adjust) will be set in the
DDS status byte.
The DPTH command sets the burst depth to x. The value x must consist of the
numerical value and a units indicator. The units must be DB (dB) or PR (%). If a
0% value is set, a query of DB will return -999 as an overflow value. The range
for x is 0% to 100% or 0dB to -60dB. A query must be followed by one of the
units indicators, for example DPTH?DB.
The NBCT command sets the Noise Burst Count to x. The NBCT? query the
Noise Burst Count. The minimum value of x must be within 4 digits of NRCT;
the maximum must be less than NRCT (i.e. for NRCT=3s, NBCT ranges from
1ms to 2.999s).
Remote Programming 4-15
DS360 Ultra Low Distortion Function Generator