Icom I706MKTMG, IC-706MKIIG instruction manual IF filters, CR-282 HIGH-STABILITYCRYSTAL UNIT

OPTIONAL INSTALLATIONS/SETTINGS 10

■CR-282HIGH-STABILITY CRYSTAL UNIT

By installing the CR-282, the total frequency stability	CR-282 frequency stability: ±0.5 ppm
of the transceiver will be improved.	(–30°C to +60°C;
➀Remove the bottom cover as shown on the oppo-	–22°F to +140°F)
site page.
➁Remove the 5 screws and 2 flat cables holding the
PLL unit in place.
➂Remove the existing crystal unit.
➃Put the CR-282 in the space available as shown in
the diagram.
➄Adjust the reference frequency at L601 using a fre-
quency counter (60.00000 MHz).
➅Return the shield case and bottom cover to their
original positions.

Reference freq. check point

	(60.00000 MHz)
PLL unit	ribbon
	cable existing
	crystal

PLL unit (bottom)

L601

ribbon	CR-282
cable

■IF filters

Several IF filters are available for the IC-706MKIIG. Choose a filter most appropriate to your operating needs.

Note: After filter installation, specify the installed filter using initial set mode (items 9, 10). Otherwise, the installed filter will not function properly.

FL-100CW NARROW FILTER		500 Hz/–6 dB
FL-101	CW NARROW FILTER	250 Hz/–6 dB
FL-103	SSB WIDE FILTER	2.8 kHz/–6 dB
FL-223	SSB NARROW FILTER	1.9 kHz/–6 dB
FL-232	CW/RTTY NARROW FILTER	350 Hz/–6 dB

➀Remove the top cover as shown on the previous page.

➁Install the desired filter as shown in the diagram

below.

•These filters can be installed in either direction.

➂Replace the top cover.

Filter

60