Software Adjustment - Icom IC-F70DT Service Manual

5-2 SOFT WARE ADJUSTMENT
Select an operation using [↑] / [↓] keys, then set specifi ed value using [←] / [→] keys on the connected computer keyboard
ADJUSTMENT ADJUSTMENT CONDITION
PLL LOCK 1 • Operating CH.
VOLTAGE • Preset [LV (RX1)]
[RX LVA1] • Receiving
[RX LVA2] 2 • Operating CH.
• Preset [LV (RX2)]
• Receiving
[TX LVA] 3 • Operating CH.
• Preset [LV (TX)]
• Transmitting
CONVENIENT:
The PLL lock voltage can be adjusted automatically.
Put the cursor on each items "RX LVA1"/"RX LVA2"/"TX LVA" and then push [ENTER] key of the connected
PC's keyboard.
PLL LOCK 1 • Operating CH.
VOLTAGE • Receiving
2 • Operating CH.
• Receiving
3 • Operating CH.
• Transmitting
REFERENCE • Operating CH.
• Connect an RF power meter or 50 Ω
FREQUENCY
[REF]
dummy load to the antenna connector.
• Transmitting
DSP • Operating CH.
• Receiving
REFERENCE
FREQUENCY*
[Dig REF]
BASE BAND • Operating CH.
CENTER • Receiving
VOLTAGE*
[Dig DA]
*; IC-F70DT/DS only
MAIN UNIT
UNIT
: CH 2 PC Click [Reload (F5)] button, then
: 169 [3.30 V] screen check the "LVIN" item on the
CS-F70/F1700 ADJ's screen.
: CH 1
: 179 [3.50 V]
: CH 2
: 179 [3.50 V]
: CH 2 PC Click [Reload (F5)] button, then
screen check the "LVIN" item on the
CS-F70/F1700 ADJ's screen.
: CH 1
: CH 2
: CH 2 Top Loosely couple a frequency
panel counter to the antenna connec-
tor.
: CH 9 DSP Connect a frequency counter
unit to the pin 4 of IC13 on the DSP
unit through a 1000 pF capacitor.
(see the illust below)
: CH 9 PC Set the "Dig DA" item to 70.
screen
DSP UNIT
5 - 4
MEASUREMENT
OPERATION
DSP REFERENCE FREQUENCY
CHECK POINT (
VALUE
3.3 V
3.5 V
3.5 V
3.2–3.4 V
(Verify)
3.4–3.6 V
(Verify)
3.4–3.6 V
(Verify)
174.000000 MHz
±100 Hz
12.288000 MHz
IC-13, pin 4)