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
8
DQT : 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
4
Ω
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