Kenwood NX-800H Service Manual page 23

■ 5 reference level adjustments frequency
Tuning point RX (MHz)
Low 335.05000
Low' 347.55000
Center 365.05000
High' 382.55000
High 399.95000
■ Adjustment item supplement
Adjustment Item
LCD contrast
Receive Assist
Transmit Assist
RTC
Frequency
High Transmit Power Limit
Low Transmit Power Limit
High Transmit Power
Low Transmit Power
Balance
Maximum Deviation
(NXDN Narrow/Very Narrow)
Maximum Deviation
(Analog Wide/Narrow)
QT Deviation
DQT Deviation
LTR Deviation
DTMF Deviation
Single Tone Deviation
MSK Deviation
CWID Deviation
Sensitivity 1
Sensitivity 2
RSSI Reference
Open Squelch
ADJUSTMENT
TX (MHz)
335.10000
347.60000
365.10000
382.60000
399.90000
The contrast of LCD display can be changed.
The lock voltage of VCO (Receive) is adjusted.
This item must be adjusted before all adjustment items for receiver section are adjusted.
The lock voltage of VCO (Transmit) is adjusted.
This item must be adjusted before all adjustment items for transmitter section are adjusted.
Rea Time Clock (RTC) is adjusted.
This item uses the internal clock.
(Any measurement equipment is not required.)
Frequency stability is adjusted under receiving condition with SSG.
The SSG needs 0.001ppm accuracy so please use a standard oscillator if necessary.
This item can be adjusted only in PC Test Mode so that the adjustment value is not changed easily.
The limit value of the High Transmit Power output is adjusted.
The limit value of the Low Transmit Power output is adjusted.
High Transmit Power is adjusted.
Low Transmit Power is adjusted.
The transmit audio frequency response is adjusted.
This item is adjusted so that the deviation of 2kHz becomes the same deviation of 20Hz.
This item must be adjusted before all adjustment items for deviations are adjusted.
Maximum Deviation of NXDN (Narrow/Very Narrow) is adjusted.
Maximum Deviation of Analog (Wide/Narrow) is adjusted.
This item must be adjusted before all adjustment items for tone deviations are adjusted.
Note: "Maximum Deviation (Analog Narrow)" must be adjusted before "CWID Deviation (NXDN Very
Narrow)" is adjusted.
QT tone deviation is adjusted.
DQT tone deviation is adjusted.
LTR tone deviation is adjusted.
DTMF tone deviation is adjusted.
The deviation of Single Tone used in "2-tone" is adjusted.
MSK tone deviation is adjusted.
CWID tone deviation is adjusted.
CWID is used to inform the others who is transmitting on a 6.25-kHz spacing channel.
(In FCC rule, Analog mode or CWID is required for each channel-spacing.)
Sensitivity 1 allows a service engineer to improve the intermodulation rejection, receiver spurious response,
and receiver sensitivity characteristics by changing the voltage of Variable-Capacitor Tune in the receiver
front-end circuit of the primary band-pass fi lter to optimize the characteristics at fi ve frequency spots.
Sensitivity 2 allows a service engineer to improve the intermodulation rejection, receiver spurious response,
and receiver sensitivity characteristics by changing the voltage of Variable-Capacitor Tune in the receiver
front-end circuit of the secondary band-pass fi lter to optimize the characteristics at fi ve frequency spots.
The minimum RSSI level for scan stop is adjusted.
The squelch level at level "5" is adjusted.
Note:
Although the frequency range of this transceiver is 380 to
400MHz, the circuit and adjustments are designed under
consideration of other market types.
When making adjustments, adjust at all frequency points
following the service manual.
Description
NX-800H
23