Setting Speaker Delay Settings Using Sis Commands - Extron electronics SSP 7.1 User Manual

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Setting Speaker Delay Settings Using SIS Commands

NOTE:
To adjust compensation delays using SIS commands, follow these instructions.
Two Person Setup
NOTE:
1.
2.
3.
4.
5.
6.
ASCII Command Response
(host to unit) (unit to host)
E }
zXXX Zpx
E }
zQQQ Zpq
E }
UPLOAD Go
Up1
20S
Sts20*
3S
Sts3*
It is strongly recommended that, for ease and simplicity, these adjustments are
made with the Setup and Control Software
delay values can be calculated and entered, using SIS commands.
Setting up speaker delays is easier with two people. If only one person is available,
the position of the listener's ears must be marked precisely using, for example, a pile of
boxes. Do not try to guess ear positions, as this introduces measurement errors.
Pick an ideal central location where all speaker output signals converge.
Use a tape measure to measure the distance from each speaker to the convergence
location. Be sure to measure to the same spot from each speaker.
NOTE: Measurements from the speaker should be to the midrange driver in a
three-way speaker or from halfway between the tweeter and the woofer in a two-way
speaker. Measurements to the convergence location should be at ear height.
When the distances to every speaker have been measured accurately, select the speaker
that is farthest from the convergence location and use that distance as a reference value.
Calculate the delay distance for each speaker, where:
Delay Distance = Farthest Speaker Distance - Individual Speaker Distance
Calculate the delay time (in ms) for each speaker, where:
Delay Time = Delay Distance / Vs
NOTE:
The constant Vs (the speed of sound) is 0.343 m/ms or 1.12533 ft/ms.
For SIS commands, the delay time must be converted to units of 0.1 ms:
SIS Delay Time = Delay Time (per ms) x 10
Additional Description
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SSP 7.1 • SIS Commands
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0 1
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