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TRANSMITTER ADJUSTMENTS (continued)<br />
ADJUSTMENT<br />
IF TOTAL<br />
GAIN<br />
TOTAL GAIN<br />
(for 144 M)<br />
(for 430 M)<br />
Ic APC<br />
1<br />
1<br />
2<br />
3<br />
ADJUSTMENT CONDITION<br />
• Display frequency: Any<br />
• Mode<br />
: USB<br />
• M<strong>IC</strong> gain : Center<br />
• Disconnect P501 (PA unit) from J51<br />
on the MAIN unit.<br />
• Connect an audio generator to<br />
[M<strong>IC</strong>] connector and set as:<br />
Frequency : 1.5 kHz<br />
Level : 2 mVrms<br />
• Transmitting<br />
• Display frequency:<br />
[EUR], [KOR] 145.0000 MHz<br />
[USA-1], [AUS] 146.0000 MHz<br />
• Mode<br />
: USB<br />
• RF power : Maximum<br />
• M<strong>IC</strong> gain : Center<br />
• Connect an audio generator to<br />
[M<strong>IC</strong>] connector and set as:<br />
Frequency : 1.5 kHz<br />
Level : 2 mVrms<br />
• Transmitting<br />
• Display frequency:<br />
[EUR], [KOR] 435.0000 MHz<br />
[USA-1], [AUS] 450.0000 MHz<br />
• Transmitting<br />
• Display frequency: 146.0000 MHz<br />
• Mode<br />
: USB<br />
• Connect CP1631 (MAIN unit) to<br />
GND.<br />
• RF power : Maximum<br />
• Mic gain : Center<br />
• Connect an audio generator to<br />
[M<strong>IC</strong>] connector and set as:<br />
Frequency : 1.5 kHz<br />
Level : 20 mVrms<br />
• Transmitting<br />
ADJUSTMENT<br />
MEASUREMENT<br />
VALUE<br />
POINT<br />
UNIT LOCATION UNIT ADJUST<br />
MAIN<br />
Rear<br />
panel<br />
Rear<br />
panel<br />
Connect an RF voltmeter<br />
to check point<br />
J51 via the JIG cable<br />
(B).<br />
After adjustment, connect P501 (PA unit) to J51 on the MAIN.<br />
Connect an RF<br />
power meter to [VHF<br />
ANT] connector.<br />
Connect an RF<br />
power meter to [UHF<br />
ANT] connector.<br />
Connect an ammeter<br />
(30A) between power<br />
supply and the <strong>IC</strong>-<br />
<strong>910H</strong>.<br />
After adjustment, disconnect CP1631 (PA unit) from GND on the MAIN.<br />
–22 dBm<br />
50 W<br />
37.5 W<br />
23 A<br />
MAIN<br />
PA<br />
MAIN<br />
R3<br />
R503<br />
R3<br />
R1613<br />
DRIVE LEVEL<br />
1<br />
• Display frequency: 146.0000 MHz<br />
• Mode<br />
: USB<br />
• RF power : Maximum<br />
• Mic gain : Center<br />
• Disconnect P501 (PA unit) from J51<br />
on the MAIN unit.<br />
• Connect an audio generator to<br />
[M<strong>IC</strong>] connector and set as:<br />
Frequency : 1.5 kHz<br />
Level : 20 mVrms<br />
• Transmitting<br />
MAIN<br />
Connect an RF voltmeter<br />
to check point<br />
J51 via the JIG cable<br />
(B).<br />
Read the RF voltmeter<br />
indication.<br />
Verify<br />
LO LEAK<br />
(for 144 M)<br />
2<br />
1<br />
• Mode<br />
: CW<br />
• CW paddle : OFF<br />
• Connect a keyer to the [KEY] jack.<br />
• Key down (transmitting)<br />
After adjustment, connect P501 (PA unit) to J51 on the MAIN.<br />
LO leak must be performed after software adjustment (7) “TX POWER/METER”.<br />
• Display frequency:<br />
[EUR], [KOR] 146.0000 MHz<br />
[USA-1], [AUS] 148.0000 MHz<br />
• Mode<br />
: USB<br />
• RF power : Minimum<br />
• M<strong>IC</strong> gain : Center<br />
• Transmitting<br />
Rear<br />
panel<br />
Connect an RF<br />
power meter to [VHF<br />
ANT] connector.<br />
Same level as step 1<br />
Minimum output power<br />
MAIN<br />
PA<br />
R202<br />
R504<br />
5 - 10
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