JRC GKP-2794 User manual

C-Band Weather Radar Radio Module GKP-2794
C-Band Weather Radar Radio Module
GKP-2794
User’s Manual
2020 July

PREFACE
BEFORE OPERATION
■GRAPHIC INDICATION
Various graphic indications are included in this manual and are shown on the equipment so that it
can be operated safely and correctly and prevent any danger to the operator and/or to other
persons and any damage to property during operation. Such indications and their meanings are as
follows.
Understand them before reading this manual.
This indication is shown where it indicates that any person will be in
danger of seriously injured or loss of life if this indication is
neglected and the equipment are not operated correctly.
This indication is shown where it indicates that any person will be in
danger of seriously injured or loss of life if this indication is
neglected and the equipment are not operated correctly.
■ EXAMPLES OF GRAPHIC INDICATION
WARNING
CAUTION

C-Band Weather Radar Radio Module GKP-2794
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・PRECAUTIONS
WARNING
Do not touch TRX Unit.
TRX Unit is a moving part, and it may cause injury.
For internal inspection and repair work of equipment components,
consult with our branch office, branch shop, sales office, or our
distributor in your district.
This transmitter must not be co-located or operated in conjunction with any other antenna or
transmitter.
This device complies with Part 90 of the FCC rules.

C-Band Weather Radar Radio Module GKP-2794
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Table of content
PREFACE.......................................................................................................................................................................................... 1
BEFORE OPERATION............................................................................................................................................................ 1
・PRECAUTIONS....................................................................................................................................................................... 2
1.General........................................................................................................................................................................................... 1
2. Specifications............................................................................................................................................................................. 2
2.1 Interface................................................................................................................................................................................ 2
2.2 Performance........................................................................................................................................................................ 3

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1.General
GKP-2794 is sloid-state radio module of weather radar. It is composed with STALO, DSP Unit,
TRX Unit Module, and PA Unit. The source oscillation signal is generated in Signal Processor. TRX Unit
up-convert the source oscillation to the transmission frequency by mixing it with the local signals
generated by STALO, and amplifies it at the PA Unit.
Since this is solid-state type, it does not require either pre-heat or tune-up. Also, it is possible
to keep stable transmission and low power consumption for longer period of time.
Details of the components are shown in the next page.
STALO
DCN-DC522-102IR
Transmitter
/Receiver
CMN-856
DSP Unit
CDC-1450
High pass
filter
SCHPF-
5600/T5100
-O/O
Power
Amplifier
CAH-5658
Harmonic
filter
NFH-5659
1
st
Local Signal
2
nd
Local Signal
Source
Oscillation
Signal
Transmission
Signal To Antenna
Transmission
Signal Transmission
Signal
10dB ATT
AT-110(40)
6dB ATT
AT-106(40)
Block Diagram of transmission

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2. Specifications
2.1 Interface
Harmonic
filter
NFH-
5659
High pass
filter
SCHPF-
5600/T51
00-O/O
Transmitter
/Receiver
CMN-856
STALO
DCN-DC522-102IR
RF OUT1
REF OUT1
DSP Unit
CDC-1450
J1
Tx OUT
Power
Amplifier
CAH-5658
To Antenna
J1 J2
J401
1
st
LOIN
J402
2
nd
LOIN
J101
J102
Tx OUT
10dB ATT
AT-110(40)
6dB ATT
AT-106(40)
No Port Name Detail Spec. Remarks
STALO
RF OUT1 1st Local Signal Output SMA-J
REF OUT1 2nd Local Signal Output SMA-J
Signal Processor
J1 TX OUT IF Signal Output SMA-J
TRX Unit
J101 TX IF TX IF Signal Input SMA-J
J102 TX OUT TX RF Signal Output SMA-J
J401 1st LO IN 1stLO Input SMA-J
J402 2nd LO IN 2ndLO Input SMA-J
High Pass Filter
SMA-J
PA Unit
J1 RX TX RF input signal TNC-J
J2 TX OUT RF output signal TNC-P
Harmonic Filter

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2.2 Performance
No Item Specification Remarks
1 Transmission
frequency 5600 MHz, 5800 MHz
2 TRX Unit IF
frequency 60MHz
3 Duty 10% or less
4 OBW 8MHz or less
5 Transmit RF output 400 W (Peak)
6 Operating
temperature range
0℃～+60℃
7 Storage temperature
range
0℃～+60℃
8 Power Supply
DC+12V: DSP Unit
DC+12V: STALO
DC+12V: TRX Unit
DC+48V: PA Unit