ETS SM5-EQ-PSSE User manual

SM5-EQ-PSSE Microphone kit Instructions
The SM5-EQ-PSSE is a single channel audio equalizer and microphone interface designed for use in acoustically difficult
environments such as interrogation rooms. The SM1-PSSE High performance, tamper resistant, very low noise
microphone with an automatic gain control circuit is included with the kit. Note- the audio output of the SMEQ-1 can be set
for “microphone” or “line level output”.
SM1-PSSE Microphone Placement
Locate the SM1-PSSE microphone as close as possible to the area of interest in the space to be monitored. Do not mount
the microphone near air conditioning vents, light fixtures or electrical equipment. The SM1-PSSE should be placed as
close as possible to the subject(s) to be monitored. The SM1-PSSE is still useable at distances of up to 25 feet but is
dependent on the level of background noise in the area. Experimentation in the environment will determine what distances
work best.
Adjusting the SM1-PSSE Lo-Cut and Hi-cut filters
The SM1-PSSE’s high and low frequency response can be trimmed to reduce background noise. If you are primarily
interested in capturing conversations and want to reduce air conditioning and other noises, rotate both controls (hi-cut and
lo-cut) to just short of full clockwise. Some experimentation may be required to achieve the best results for a given
environment.
Adjusting the SM1-PSSE Automatic Gain Control
The SM1-PSSE features automatic control of gain. This is useful for environments where it is anticipated that sound levels
will range from quiet to loud. This prevents the end user from having to constantly readjust the volume of the base station
to the audio environment and to reduce the possibility of pre-amplifier clipping (distortion). The best way to set this control
is to adjust it to a comfortable volume level (on an ETS base station or PC monitor speakers) when the loudest sounds
are present and constant. Turning the control CW will increase the amount of gain reduction during loud sound intervals. If
the sound is reduced too much during loud sounds, turn the control CCW a small amount and experiment until a
comfortable medium is found.
Adjusting the SM1-PSSE Volume
The SM1-PSSE’s output level is set by selecting the desired volume range and adjusting the gain control.
The “Volume Range” jumper should be set to the “LO” position when using the SM1-PSSE with IP cameras that utilize
“microphone inputs” also known as “Mic. Level” inputs. This sets the maximum gain of the SM1-PSSE’s pre-amp to x14.
The jumper should be placed in the “HI” position when using IP cameras with “Line level” inputs of DVRs and I/P cameras.
This sets the maximum gain of the SM1-PSSE’s pre-amp to x196. The SM1-PSSE is shipped with the Volume set at
midrange. If the sound at the “head end” is distorted, rotate the control towards the – mark (counter-clockwise). If the
volume at the “head end” is too low, rotate the control towards the + mark (clockwise). Note- the SM1-PSSE output signal
can be used to drive a microphone level input (-60db) of a DVR or IP camera by turning the volume all the way down (full
CCW) and then CW a small amount.
SMEQ-1 location and power
The SMEQ-1 interface box is designed to be used as a stand alone DVR or IP camera interface or it can be used “in line”
with any ETS base station. When used as a DVR or I/P camera interface, use the supplied AC adaptor. When the SMEQ-
1 is used with an ETS base station, The AC adaptor is not required because it draws power from the ETS base station.
Cable Runs
Run a 22 gauge, stranded, two conductor shielded cable between the SMEQ-1 module and the SM1 microphone and the
SMEQ-1, and ETS base station or interface box. Keep the cable run distances under 1,000 feet and away from AC power
sources, light fixtures and electrical equipment. See Figure 1 for connection diagram.
Audio input
Connect any SM1 series microphone to the microphone input OR any other “line level” signal to the audio input. Do not
use both inputs at the same time.

Adjusting the microphone “gain” and SMEQ-1 “level” controls (audio output)
If the SMEQ-1will be plugged into a “microphone level” input of an IP camera, set the microphone gain of the SM1-PSSE
slightly clockwise (or 1/8 of a full turn) from full counter-clockwise. Then use the “level control” on the
SMEQ-1 to set a volume that produces an acceptable audio level at the head end. If the SMEQ-1 will be used with a “line
level” input, turn the gain control of the SM1-PSSE to 3/4 full clockwise and adjust the level control on the SMEQ-1 to
produce the clearest audio level at the head end.
Setting the SMEQ-1 levels
Setting an equalizer for the desired overall sound is a subjective topic. Experimenting with the controls is the best way to
learn and achieve good results. We recommend using headphones to evaluate the sound quality. Start with setting all
controls to the mid-point (flat= no gain or cut). We suggest you do this when the desired sound source is present (people
taking, being interviewed, etc.) Adjust each control clockwise and counter clockwise to get a feel for how each band
affects the overall sound. Keep in mind that the human voice resides in the 1Khz-6Khz range. To focus on these bands
the 60Hz, 150Hz, 400Hz and 10Khz controls can all be turned full counter clockwise. The remaining 3 controls (1Khz,
2.5Khz and 6Khz) can then be adjusted for best sound clarity and intelligibility. Note- turning any of the controls fully
clockwise will produce noticeable amplifier noise (a hissing sound).
Caution
It may be against the law to install this microphone kit in certain environments. It may also be against the law to record conversations of
the person(s) being monitored without their knowledge. It is the responsibility of the installation company and end-user to determine if
the application of this product is legal. These laws vary from state to state. If you are not informed on these matters, consult a qualified
attorney or contact the appropriate state agency. A sticker is provided with this kit for the applications where notification must be
posted. Warranty
All ETS products carry a one year parts and labor warranty. This warranty does not cover damages as a result of misuse, improper
handling of the unit or exposure to extreme temperatures or moisture. At its discretion, ETS reserves the right to repair or replace this
unit under the conditions of the warranty. If you experience problems with your equipment call ETS at: 505-888-3923 to obtain a return
authorization number. Equipment requiring repair beyond the warranty period or units that have been damaged or are not covered
under the warranty can be repaired by ETS for a minimal cost under most conditions.
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