Sigtronics Sport 200 S Installation Instructions - Manual (Page 4)

Figure 7
page 4
HOW TO SELECT MUSIC OPTION
To select full music mute during intercom the unit must be removed
from the aircraft. This is done by first removing the volume and squelch
control knobs with a 0.05 inch Allen wrench. Then remove the two
mounting screws and switch nut that holds the unit in the panel. The
unit is now free for removal from the aircraft after disconnecting the
cables at the plugs.
To enable this option, modification to the bottom of the units’ circuit
board is required. CAUTION – a qualified technician should perform
this modification. First remove the three screws securing the bottom
cover to the case and carefully lift and remove the cover. Note that the
circuit board does not have to be removed from its case to complete
the modifications.
To select full mute during intercom solder the two small-insulated
jumper wires at the locations specified in Figure 7.
Replace the cover and secure it with the three screws as before. Install
the unit back into the panel and plug in the two cables.
Sport 200 S PUSH-TO-INTERCOM INSTRUCTIONS
Install a separate momentary switch at each headset position. Connect
per Figure 4. To use the push-to-intercom feature, turn the squelch
control on the intercom fully counter-clockwise. Then to activate, press
the push-to-intercom switch(s). Alternately, to use the intercom in voice
activated (VOX) mode set the intercom squelch as normal. See the
separate Sport 200 S OPERATING INSTRUCTIONS sheet.
Model: SPA-200S
small blade screwdriver. In the event of over-modulation (garbled) or
reports of weak transmissions over the aircraft radio, an appropriate
adjustment can be made. Clockwise rotation increases the output level
to the aircraft radio mic input. Counter-clockwise rotation decreases
modulation level. This adjustment sometimes needs to be made after
the initial installation of the intercom or if a new radio is installed. (The
output is set for unity gain at Sigtronics).
Radio Receive Adjust
It may also be necessary to adjust the unit radio receive input from the
aircraft radio. A small adjustable potentiometer is provided inside the
unit for this purpose. It is accessible under a sticker on top of the chassis
box (see Figure 4), and can be adjusted with a small blade screwdriver.
In the event of low aircraft radio volume in the “ON” mode relative to
“OFF” mode, an appropriate adjustment can be made. Clockwise rotation
increases the input level to the Sport 200 S radio receive input. Counter-
clockwise rotation decreases input level. This adjustment sometimes
needs to be made after the initial installation of the intercom or if a new
radio is installed that has a low output impedance or low output power.
The adjustment is best made with all headsets plugged in. (The input is
set full CCW which is unity gain for 500
Ω radios). Note: Be sure to replace
the sticker when you have completed the adjustment.
You are now ready to check for proper wiring of the music source. First,
make sure squelch is off (full counter clockwise) and intercom is ON.
Turn on the music source and listen for music through pilot and co-pilot
headsets. There should be music.
If everything checks out, refer to the Sport 200 S OPERATING
INSTRUCTIONS sheet for proper use and other operating modes of
the Sigtronics Sport 200 S intercom system. If something does not
work as described, carefully go over the intercom wiring again. If
something is still not right or you have any questions regarding the
installation and operation of the Sigtronics Sport 200 S intercom or any
other Sigtronics product feel free to contact us directly or E-mail us at
[email protected]. Technicians are available Monday though Friday
8 am to 4:30 PM Pacific time.
See the separate Sport 200 S OPERATING INSTRUCTIONS sheet for
complete operation information.
Sigtronics Corporation
178 East Arrow Highway
San Dimas, CA 91773
(909) 305-9399
www.sigtronics.com
Sport200S_E_INST REV E 3-27-2009