Icom IC-F5121D Service Manual

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Icom IC-F5121D Service Manual Manual pdf 19 page image

6 - 5No over or under shoot.As flat as possible.ADJUSTMENT TRANSCEIVER’SCONDITION OPERATION ADJUSTMENTITEM VALUETX POWER(Hi power)1 • Channel : 1-6• Transmitting• Connect an RF power meter to theantenna connector. [Power (Hi)] 50 W [50 W ver.]25 W [25 W ver.](L2 power) 2 • Channel : 1-7• Transmitting [Power (L2)] 25 W [50 W ver.]10 W [25 W ver.](L1 power) 3 • Channel : 1-8• Transmitting [Power (L1)] 5.0 W [50 W ver.]2.5 W [25 W ver.]MODULATIONBALANCE(Band low)1 Channel : 1-9• Transmitting• Set the preset value. [MOD (WIDE)] 1501) Set the TX mode to "2" on the "AdjustUtility" screen.2) Push [ENTER] on the PC’s keyboard,to enter the modulation balanceadjustment mode.[BAL Start] –2 • Connect a modulation analyzer with anoscilloscope to the antenna connectorthrough an attenuator, and set it as;HPF : OFFLPF : 20 kHzDe-emphasis : OFFDetector : (P–P)/2[BAL 1](Band center) 3 • Channel : 1-10• Transmitting. [BAL 2](Band high) 4 • Channel : 1-11• Transmitting. [BAL 3]5 • Push [ENTER] on the PC’s keyboard, tostore the value and quit the modulationbalance adjustment mode.[BAL Start] –FM DEVIATION( Narrow mode)-Band low-1 • Push [ENTER] on the PC’s keyboard, to enter the FM deviation(For narrow mode) adjustment mode. [MOD N Start] –2 • Channel : 1-12• Transmitting• Connect a modulation analyzer to theantenna connector through an attenuator,and set it as described in the "MODULATIONBALANCE" above.• Connect as audio generator to the [MIC]jack, and set it as;Frequency : 1 kHz (Sine wave)Level : 40 mVrms[MOD N L]±2.05 to ±2.15kHz-Band center- 3 • Channel : 1-13• Transmitting [MOD N C]-Band high- 4 • Channel : 1-14• Transmitting [MOD N H]5 • Push [ENTER] on the PC’s keyboard, to store the value and quitthe FM deviation (For narrow mode) adjustment mode. [MOD N Start] –(Wide mode)-Band low-6 • Push [ENTER] on the PC’s keyboard, to enter the FM deviation(For wide mode) adjustment mode. [MOD W Start] –7 • Channel : 1-15• Transmitting• Connect a modulation analyzer tothe antenna connector through anattenuator, and set it as described in the"MODULATION BALANCE" above.• Connect as audio generator to the [MIC]jack, and set it as;Frequency : 1 kHz (Sine wave)Level : 40 mVrms[MOD W L]±4.05 to ±4.15kHz-Band center- 8 • Channel : 1-16• Transmitting [MOD W C]-Band high- 9 • Channel : 1-17• Transmitting [MOD W H]10 • Push [ENTER] on the PC’s keyboard, to store the value and quitthe FM deviation (For wide mode) adjustment mode. [MOD W Start] –(Middle mode)*-Band low-11 • Push [ENTER] on the PC’s keyboard, to enter the FM deviation(For middle mode) adjustment mode. [MOD M Start] –12 • Channel : 1-18• Transmitting• Connect a modulation analyzer to theantenna connector through an attenuator,and set it as described in the "MODULATIONBALANCE" above.• Connect as audio generator to the [MIC]jack, and set it as;Frequency : 1 kHz (Sine wave)Level : 40 mVrms[MOD M L]±3.25 to ±3.35kHz-Band center- 13 • Channel : 1-19• Transmitting [MOD M C]-Band high- 14 • Channel : 1-20• Transmitting [MOD M H]15 • Push [ENTER] on the PC’s keyboard, to store the value and quitthe FM deviation (For middle mode) adjustment mode. [MOD M Start] –6-3 TRANSMIT ADJUSTMENTS1) Select an adjustment item using [↑]/[↓] on the PC's keyboard.2) Set or modify the adjustment value as specifi ed using [←]/[→] on the PC's keyboard, then push [ENTER].*: [EUR] only