Icom IC-9100 Instruction Manual - Page 39

2 INSTALLATION AND CONNECTIONS ■ Microphone connector information (Front panel view) q Microphone input w +8 V DC output i Main band's AF output (varies with [AF]) u GND (Microphone ground) y GND (PTT ground) e Frequency up/down t PTT r Main band's squelch switch [MIC] Pin No. w e r FUNCTION +8 V DC output Frequency up Frequency down Squelch open Squelch closed DESCRIPTION Max. 10 mA Ground Ground through 470 ˘ "Low" level "High" level CAUTION: DO NOT short pin 2 to ground as this can damage the internal 8 V regulator. DC voltage 1 is applied to pin 1 for microphone operation. Use caution when using a non-Icom microphone. 2 ■ Microphones D HM-36 q q w w D SM-50 (Option) q rq w r e w e 3 4 q UP/DOWN SWITCHES [UP]/[DN] Push to change the frequency or memory channel. • While holding down, the frequency or memory channel number continuously increases or decreases. • While in the split frequency mode, and holding down [XFC], push to change the transmit frequency. • The [UP]/[DN] switch can be used as a key paddle if the "MIC Up/Down Keyer" item setting is "ON" in the Keyer Set mode. In such case, the frequency and memory channel cannot be changed using the [UP]/[DN] switches. (p. 55) • Y ou can set the dot-dash polarity of the [UP]/[DN] switch in the "Paddle Polarity" item of the Keyer Set mode. When "Normal" is selected, [UP] sends a dash, and [DN] sends a dot. (p. 55) 5 6 7 8 9 10 11 w PTT SWITCH 12 Hold down to transmit; release to receive. 13 e PTT LOCK SWITCH (available on only the SM-50) Push to toggle between transmit and receive. 14 r LOW CUT SWITCH (available on only the SM-50) Push to cut out the low frequency components of 15 input voice signals. 16 17 18 19 20 21 30