ETS SM1-WPB User manual

SM1-WPB Microphone Instructions
The SM1-WPB is a high quality, 12-24VDC powered, surface mount, omni-directional, pre-
amplified, weather proof microphone for use with DRVs, IP cameras, etc. Note- the audio output
of the SM1-WPB is “line level” (0db).
SM1-WPB Microphone Placement.
The SM1-WPB is designed for outdoor applications and can even withstand complete
submersion in water. Do not mount the microphone near air conditioning vents, light fixtures or
electrical equipment. The SM1-WPB should be placed as close as possible to the subject(s) to be
monitored. The SM1-WPB is usable 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-WPB microphone and
the monitoring device. Keep the cable run distance under 1,000 feet and away from AC power
sources, light fixtures and electrical equipment. Connect power to the + terminal, the audio signal
to the “audio” terminal and ground to the – terminal. The Ground of the power and audio signal
must share a common ground for proper operation. See Figure 1 for connection diagram.
Sound Chamber Wind Screen
Over time the wind screen may become saturated with moisture or dirt and the sound quality and
volume will be noticeably reduced. If this happens, remove and soak the screen in soapy warm
water. Then, rinse and wring out the excess water from the screen and reinstall it.
Mounting
The SM1-WPB is designed to be surface mounted on any flat surface and has ½” conduit
connector ports on the top and rear of the enclosure.
Adjusting the SM1 Gain
The SM1-WPB output level is set by selecting the desired volume range and adjusting the gain
control.
The “Volume Range” switch should be set to the “LO” position when using the SM1-WPB with IP
cameras that utilize “microphone inputs” also known as “Mic. Level” inputs. The switch should be
placed in the “HI” position when using IP cameras with “Line level” inputs of DVRs and IP
cameras.
The SM1-WPB 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 Hi-Cut/Lo-Cut switches
The normal frequency response of the SM1 microphone is 500-16Khz. When both switched “in”,
The “HI Cut” and “Lo Cut” filters set the SM1’s frequency response to 900-6Khz. Enabling one or
both of the filters is useful when background noise needs to be further reduced and intelligibility of
speech emphasized. We recommend experimenting with the switch settings to achieve the best
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 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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