ETS SM1-LE2 Installation

SM1-LE2 Microphone Instructions

The SM1-LE2 is a high quality, 12VDC powered, surface mount, omni-directional, pre-amplified
microphone for use with DRVs, I/P cameras, etc. Note- the audio output of the SM1 is jumper
selectable “line level” (0db) or “microphone level” (-30db).

SM-LE Microphone Placement.

Locate the SM1-LE2 Microphone near the area of interest in the room to be monitored. If the
entire room is to be monitored, locate the SM1-LE2 in the middle of the room. Do not mount the
microphone near air conditioning vents, light fixtures or electrical equipment. The SM1-LE2
should be placed as close as possible to the subject(s) to be monitored. The SM1 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.

Cable Run

Run a 22 gauge, stranded, two conductor shielded cable between the SM1-LE 2 microphone and
the monitoring device. Keep the cable run distance under 1,000 feet and away from AC po wer
sources, light fixtures and electrical equipment. Connect power to the + terminal, the audio signal
to the “audio” terminal and ground to the – terminal. See Figure 1 for connection diagram.

Mounting

The SM1-LE2 is designed to be mounted on any flat surface. The cable can be routed into the
SM1-LE2 from the side or from the rear of the enclosure.

Adjusting the SM-LE Gain (open the enclosure to adjust)

The SM1-LE2 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-LE2 with I/P
cameras that utilize “microphone inputs” also known as “Mic. Level” inputs. This sets the
maximum gain of the SM1-LE2’s pre-amp to x14. The jumper should be placed in the “HI”
position when using I/P cameras with “Line level” inputs of DVRs and I/P cameras. This sets the
maximum gain of the SM1-LE2’s pre-amp to x196.

The SM1-LE2 is shipped with the gain 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).

Setting the SM1-LE2 Hi-Cut/Lo-Cut Jumpers (open the enclosure to adjust)

The normal frequency response of the SM1-LE2 microphone is 500-13Khz. When both jumpered
“in”, The “HI Cut” and “Lo Cut” filters set the SM1-LE2’s frequency response to 900-6Khz .
Enabling one or both of the filters is useful when background noise needs to be further red uced
and intelligibility of speech emphasized. We recommend experimenting with the jumper settings
to achieve the best acoustic result for your application.

Figure 1.

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 le gal. 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.

Made in the USA

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