Kenwood NX-1200 Series, Руководство по обслуживанию

Страница: 21 / 86

(No.RA077<Rev.001>)1-21
4.1.2 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
 Analog mode signaling
 NXDN mode signaling
RAN: Radio Access Number
PN9: Pseudo-Random Pattern
 DMR mode signaling
PN9: Pseudo-Random Pattern
4.1.3 Preparations for Tuning the Transceiver
Before attempting to tune the transceiver, connect the unit to a
suitable power supply.
Whenever the transmitter is tuned, the unit must be connected to
a suitable dummy load (i.e. power meter).
The speaker output connector must be terminated with an 8ohm
dummy load and connected to an AC voltmeter and an audio
distortion meter or a SINAD measurement meter at all times
during tuning.
 5 reference level adjustments frequency
4.1.4 Adjustment item supplement
NX-1200 Series (K) type
CH RX (MHz) TX (MHz)
1 155.05000 155.10000
2 136.05000 136.10000
3 173.95000 173.90000
4 155.00000 155.00000
5 155.20000 155.20000
6 155.40000 155.40000
7~16 - -
No. RX TX
1 None None
2 None 150Hz Square Wave
3 QT 67.0Hz QT 67.0Hz
4 QT 151.4Hz QT 151.4Hz
5 QT 210.7Hz QT 210.7Hz
6 QT 254.1Hz QT 254.1Hz
7 DQT D023N DQT D023N
8 DQT D754I DQT D754I
9 DTMF Decode
(Code: 159D) DTMF Encode
(Code: 159D)
10 None DTMF (Code: 9)
11 None MSK (1010..)
12 FleetSync: 100-1000 FleetSync: 100-1000
13 None Single Tine: 1000Hz
14 2-tone Decode:
A: 304.7Hz
B: 3106.0Hz 2-tone Encode:
A: 304.7Hz
B: 3106.0Hz
15 None DTMF Tone: 1477Hz
16 Single Tone: 979.9Hz Single Tone: 979.9Hz
17 None MSK PN9
18 None DTMF (Code: 3)
No. RX TX
1 RAN 1 RAN 1
2 None PN9
3 RAN 1 Maximum Deviation Pattern
4 FSW + PN9 FSW + PN9
5 Tone Pattern (1031Hz) Tone Pattern (1031Hz)
No. RX TX
1 CC 00 Burst CC 00 Burst
2 PN9 Continuous Pattern PN9 Continuous Pattern
3 CC 00 Burst Maximum Deviation
Continuous Pattern
5 CC 00 Burst 0 Continuous Pattern
6 SYNC (Each slot) + PN9
Burst Pattern SYNC (Each slot) + PN9
Burst Pattern
Tuning point RX (MHz) TX (MHz)
Low 136.05000 136.10000
Low' 145.55000 145.60000
Center 155.05000 155.10000
High' 164.55000 164.60000
High 173.95000 173.90000
NX-1200 Series (K) type
Adjustment Item Description
Assist Voltage The lock voltage of VCO is adjusted. This
item must be adjusted before all adjustment
items.
DC Offset Adjust this item to calibrate RF IC DC voltage
within an optimal range.
Frequency The Transmit Frequency is adjusted.
Ramp Offset Adjust this item to the optimal Ramp voltage.
High Transmit
Power High Transmit Power is adjusted.
Medium Transmit
Power Medium Transmit Power is adjusted.
Low Transmit
Power Low Transmit Power is adjusted.
DQT Balance The transmit audio frequency response is
adjusted.
This item is adjusted so that the deviation of
150Hz becomes the same deviation of 2kHz.
This item must be adjusted before all
adjustment items for deviations are adjusted.