Icom I706MKTMG - Manual (Page 63)

60
10
OPTIONAL INSTALLATIONS/SETTINGS
■ CR-282
HIGH
-
STABILITY CRYSTAL UNIT
By installing the CR-282, the total frequency stability
of the transceiver will be improved.
➀
Remove the bottom cover as shown on the oppo-
site page.
➁
Remove the 5 screws and 2 flat cables holding the
PLL unit in place.
➂
Remove the existing crystal unit.
➃
Put the CR-282 in the space available as shown in
the diagram.
➄
Adjust the reference frequency at L601 using a fre-
quency counter (60.00000 MHz).
➅
Return the shield case and bottom cover to their
original positions.
CR-282 frequency stability: ±0.5 ppm
(–30°C to +60°C;
–22°F to +140°F)
■ 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-100
CW 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
➀
Remove the top cover as shown on the previous
page.
➁
Install the desired filter as shown in the diagram
below.
• These filters can be installed in either direction.
➂
Replace the top cover.
Filter
PLL unit
CR-282
Reference freq. check point
(60.00000 MHz)
ribbon
cable
ribbon
cable
existing
crystal
L601
PLL unit (bottom)