Dateq SPL 2 Mode D'emploi page 25

10 Operation
RS232-connector. The installation engineer or authority that calibrates the limiter is able to
program the limiter, with the aid of a special computer program. Each day of the week is divided
into 3 TimeSlots. The attenuation of each timeslot and the timeslot boundaries can be programmed
with this program. Also special bypass-periods can be set: periods during which the limiter-functions
are not active, for example during special events. 20 Different bypass periods can be programmed.
The computer program is able to make a hardcopy of the data programmed in your limiter. It is useful
to keep a hardcopy with the limiter, so the programmed data can always be checked. If your
installation engineer or the calibrating authority doesn't have this program at his disposal, please
contact your DATEQ-representative. With some restrictions, software is available freely.
Bypass-switch. The mentioned bypass periods can also be set manually with the aid of the
bypass switch behind the left cover. Leave the right cover under seal when setting the limiter in
bypass-mode. This way the limiter doesn't have to be recalibrated after each special event.
Mic-switch. Mic-switch pressed: limiter with the aid of the measuring microphone. Mic-switch
released: the measuring microphone is unused. This means that the live-mode can not be used.
N.B.: after switching mode, the limiter needs to be recalibrated!
Output Level adjustment. With this trimmer the maximum allowed sound pressure level can be
set. Apply signal to the input of the limiter (preferably white noise), so that the threshold will be
crossed (DETECT and REDUCTION-LED are on). Adjust the OUTPUT LEVEL so that sound level
will be the maximum allowed level.
Sound Level adjustment. With this trimmer the maximum allowed sound pressure level for the
SPL3 and SPL3TS can be set. Apply signal to the input (preferably white noise), so that the threshold
will be crossed (DETECT and REDUCTION-LED are on). Adjust the SOUND LEVEL so that sound
level will be the maximum allowed level. The adjusted sound level is automatically also the valid
maximum sound level in live-mode. This means that the limiter can also be adjusted in another way:
apply signal (preferably white noise) to the microphone by means of an external audio amplifier and
speakers. Be sure that the maximum sound level is reached. Now adjust the SOUND LEVEL trimmer
so that the LIVE-WARNING-LED just starts blinking. Decreasing the noise level only 1 dB should
quiet the blinking LIVE-WARNING-LED eventually.
Threshold adjustment. The threshold-level is factory-set to 0dBm. As soon as the audio input
level exceeds 0dBm, the limiter will reduce output level. In the case a mixing console is connected
to the limiter, it is desired that the level meters on the console will indicate "0 dB" at the point the
threshold is crossed. If the output level of the mixing console is different from 0dBm (775mV), the
threshold level can be re-adjusted.
When using the SPL3 with a measuring microphone the threshold-setting has no function.
It takes some time before the limiter settles itself after adjusting the SOUND-LEVEL or the
THRESHOLD-trimmer. Take this into account, when calibrating the limiter.
Bypass indication. This LED blinks if the limiter is switched in bypass-mode. This can be the
result of a pre-programmed bypass period in the SPL2TS/3TS, or a pressed bypass-switch (behind
the left front cover) in all limiters.
Detect indication. As soon as the input level exceeds the threshold level, the DETECT-LED
lights up.
Reduction indication. When the limiter needs to reduce its output level, the REDUCTION-LED
lights up.
Overload indication. As soon as the threshold is crossed more than 14dB, the SPL-limiter can
SPL2(TS) and SPL3(TS) user manual EN