ADJUSTMENT
NX-800
45
■ Frequency and Signaling
The transceiver has been adjusted for the frequencies
shown in the following table. When required, readjust them
following the adjustment procedure to obtain the frequencies
you want in actual operation.
• Test frequency
CH RX (MHz) TX (MHz)
1 485.05000 485.10000
2 450.05000 450.10000
3 519.95000 519.90000
4 485.00000 485.00000
5 485.20000 485.20000
6 485.40000 485.40000
7~16 - -
• Analog mode signaling
No. RX TX
1 None None
2 None 100Hz Square Wave
3 LTR Data : LTR Data :
AREA=0, GOTO=12 AREA=0, GOTO=12
HOME=12 HOME=12
ID=47, FREE=25 ID=47, FREE=25
4 QT : 67.0Hz QT : 67.0Hz
5 QT : 151.4Hz QT : 151.4Hz
6 QT : 210.7Hz QT : 210.7Hz
7 QT : 254.1Hz QT : 254.1Hz
8DQT : D023N DQT : D023N
9 DQT : D754I DQT : D754I
10 DTMF : 159D DTMF : 159D
11 None DTMF Code 9
12 2-tone : 2-tone :
A : 304.7Hz A : 304.7Hz
B : 3106.0Hz B : 3106.0Hz
13 Single Tone : 979.9Hz Single Tone : 979.9Hz
14 None Single Tone : 1000Hz
15 None MSK
16 MSK MSK
• NXDN mode signaling
No. RX TX
1 RAN1 RAN1
2 None PN9
3 RAN1 Maximum deviation pattern
RAN: Radio Access Number
PN9: Pseudo-Random Pattern
(Factory only)
Panel Tuning Mode
■ Preparations for tuning the transceiver
Before attempting to tune the transceiver, connect the
unit to a suitable power supply.
Whenever the transmitter is turned, the unit must be con-
nected to a suitable dummy load (i.e. power meter).
The speaker output connector must be terminated with a
4Ω dummy load and connected to an AC voltmeter and an
audio distortion meter or a SINAD measurement meter at all
times during tuning.
■ Transceiver tuning (To enter tuning mode)
To enter tuning mode, press the [ ] key while the trans-
ceiver is in test mode. Use the [
] key to write tuning data
through tuning modes, and the [
]/[ ] key to adjust tuning
requirements (1 to 4096 appears on the LCD).
Use the [
] key to select the adjustment item through
tuning modes. Use the [
] key to adjust 5 reference level
adjustments, and use the [■] key to switch between Wide/
Narrow/Very narrow.
• LCD display in panel tuning mode
An CNTR 256
Proper value guide
(When the frequency adjustment
is necessary, ▼ or ▲ is displayed.)
Adjustment
point
L
L'
C
H'
H
2.6
Adjustment value
(1~4096)
Adjustment item
An: Analog narrow mode
Aw: Analog wide mode
Nn: NXDN narrow mode
Nv: NXDN very narrow mode
CV voltage, AD value, etc
Main LCD display
Sub LCD display
