Date

March 15, 2022

Released- Specification Ku-band PLL LNB

Internal & External Reference Model

Model No. NJR2845 series
Model No.

RF Frequency

Local Frequency

IF Frequency

NJR2845A series

10.95 to 11.7 GHz

10 GHz

950 to 1,700 MHz

NJR2845B series

11.7 to 12.2 GHz

10.75 GHz

950 to 1,450 MHz

NJR2845C series

12.25 to 12.75 GHz

11.3 GHz

950 to 1,450 MHz

NJR2845D series

11.2 to 11.7 GHz

10.25 GHz

950 to 1,450 MHz

NJR2845G series

12.2 to 12.75 GHz

11.25 GHz

950 to 1,500 MHz

Local Reference Type: Internal / External Reference
Local Stability: L-type(+/- 50 ppm) / H-type(+/- 10 ppm) / S-type(+/- 3 ppm)
/ U-type(+/- 1 ppm) / V-type(+/- 0.5 ppm)
RF Input Interface: Waveguide, WR-75 with Groove
IF Output Interface: N-type / F-type, Female Connector
DC Power Input: IF Output Interface Connector
DC Power Voltage Range: +10 to + 24V

Copyright©
Nisshinbo Micro Devices Inc.

Microwave Business Headquarters-Notice of Proprietary InformationThis document and its contents are proprietary to Nisshinbo Micro Devices Inc.
This publication and its contents may not be reproduced or distributed for any other purpose
without the written permission of Nisshinbo Micro Devices Inc.
Those specifications listed in this document are subject to change at any time.
Title:

Microwave Business Headquarters

Datasheet of NJR2845 series

Reference No.:
DS-R2845

Rev.:
01E

Sheet:
1 / 17NJR2845 series
Caution
1. While Nisshinbo Micro Devices Inc. (NISD) continually strives to improve the quality and reliability of our products, failures will
occur in microwave products over time. For this reason, it is important that customers fulfill their responsibilities to ensure
designed-in safety – including failsafe functions, redundancy, and measures to prevent malfunctions and the spread of fire –in order to avoid injuries, accidents, or social repercussions resulting from the failure of any products related to satellite
communications on this website (hereinafter, “the product”). Customers must pay careful attention to ensuring the safety of
their equipment.
2. The product is designed and tested to function in accordance with its specifications. Do not use under conditions that deviate
from the product specifications included in the delivery specifications. NISD assume no responsibility and shall not be liable forany injuries, accidents, or social repercussions resulting from the product being in a poor or damaged state because it wasused under conditions that depart from the specifications.
3. The product is covered by a warranty for one year following delivery unless otherwise stipulated in the contract or delivery
conditions. In the event of a failure for which NISD are responsible occurring during the warranty period, NISD undertake torepair or replace the product free of charge. Note, however, that the warranty does not cover failures such as those listed here
(see bullets below), even if they occur within the warranty period. In addition, in the case of a product being repaired or
replaced by us, the starting date for the warranty period is still the original delivery date of the product.
 Failure due to the product being used in conditions other than those stipulated in the data sheet, specification sheet, etc.
 Failure due to modifications or repairs carried out by some entity other than our company
 Failure determined to be the result of unsuitable maintenance or replacement of a consumable item that requires due
maintenance Failure due to circumstances that were unforeseeable given the scientific /technological standards at the time of shipment
 Other failures due to external factors such as fire, earthquake, flood and power supply anomalies for which NISD are notresponsible
In addition, the product warranty is limited to the provision of repair services or replacement at no cost. It does not coversecondary damage (to equipment, business opportunities, profits, etc.) or any other damage that may have resulted fromfailure of the product.
4. The product must be handled appropriately to ensure its continued reliability. Since it can be damaged by the intrusion ofwater, dust, oil, chemicals, etc., it must be given appropriate protection. Even in the case of a product with an airtightconstruction, avoid using it in an environment that exceeds the stated levels of waterproofing/dustproofing. Also, be sure touse connectors and waveguides properly.
If replacement parts such as fans are included, proper maintenance is necessary. To maintain product performance andfunctionality, it is necessary to conduct inspections and maintenance at appropriate intervals and exchange replacement parts
when necessary. Improper inspections or maintenance may result in failure.
In addition, the warranty does not cover the use of the product in areas where salt damage can be expected or where there
is a substantial presence of corrosive gases such as Cl2, H2S, SO2, and NO2. If the product is to be used in such areas, at thetime of installation you must take appropriate steps to protect the product.
5. If the product is to be used with equipment/systems that must meet special quality and reliability standards (aerospaceequipment, medical equipment, power generation control equipment, automotive/railway transportation equipment, safety
equipment, disaster prevention and security equipment, etc.), please consult with our sales staff in advance.
6. Some products contain gallium arsenide (GaAs), classified as a harmful substance. To avoid danger, do not incinerate, crush,or chemically treat the product in such a way that gases or dust are released. When disposing of the product, comply with allapplicable laws and regulations and do not treat it as general industrial waste or household waste.
7. When exporting a product or technology, observe export laws and regulations such as those governing foreign exchange andforeign trade, and obtain any necessary licenses for export, service transactions, etc.
NISD request that you do not use our products or the technical data published on this website for developing weapons of mass
destruction or for any other military purposes or applications.
8. The product specifications in this document are subject to change without notice. If you are considering using a product,delivery specifications must first be settled.

＊Above Specifications are subject to change without notice.

Reference No.:
DS-R2845

Rev.:

01E

Sheet:2

NJR2845 series
ScopeThis LNB is designed for the low noise amplifier and block downconverter intended for the satellite
communication data downlink application in Ku-band. It is combined a 2-stage HEMT amplifier and a blockdownconverter with a phase locked local oscillator (10 GHz, 10.25 GHz, 10.75 GHz, 11.25 GHz, or 11.3
GHz) which is synchronized with either internal high stability TCXO reference or external 10MHz reference.
The LNB receives an RF signal (Ku-band: frequency divided by region band from the 10.75 to 12.75
GHz) as input, downconverts from the RF signal to an IF signal (L-band: 950 to 1,700 MHz), and outputs
the IF signal. It is operated by +24 V DC power (range: +10 to +24 V) input.
The LNB comes in a single, weatherized housing rated for outdoor use, and has a WR-75 waveguideflange with groove as RF input and an either an N-type or F-type female connector as IF output.
I nternal Reference Model

Waveguide
WR-75

AMP.
(HEMTs)DC Power
SupplyFilter

Mixer

RF

AMP.

IF

RF Input:
10.95 to 11.7 GHz
11.2 to 11.7 GHz
11.7 to 12.2 GHz
12.2 to 12.75 GHzor
12.25 to 12.75 GHz

Multiplexer

PLO

AMP.
(HEMTs)IF Output:
950 to 1,450 MHz
950 to 1,500 MHz
or
950 to 1,700 MHz
DC Input:+10 to +24 V

10 GHz10.25 GHz
10.75 GHz
11.25 GHzor
11.3 GHzDC Power
SupplyFilterMixer

RF
RF Input:
10.95 to 11.7 GHz
11.2 to 11.7 GHz
11.7 to 12.2 GHz
12.2 to 12.75 GHzor
12.25 to 12.75 GHz

X'tal

REF

Ex ternal Reference Model

Waveguide
WR-75

DC

FilterCoaxial Connector
N-type, FemaleorF-type, Female

AMP.

FilterIF

DC
Multiplexer

REF
PLO

Filter10 GHz10.25 GHz
10.75 GHz
11.25 GHzor
11.3 GHz

Coaxial Connector
N-type, FemaleorF-type, Female
IF Output:
950 to 1,450 MHz
950 to 1,500 MHz
or
950 to 1,700 MHz
Reference (REF):
10 MHzDC Input:+10 to +24 V

Fig.2 Functional Block Diagram＊Above Specifications are subject to change without notice.

Reference No.:
DS-R2845

Rev.:

01E

Sheet:3

NJR2845 series
Series Model Number

Numbering System

N J R 2 8 4 5 A H F
IF Interface Connector
F: F-type (75 ohms), Female Connector
N: N-type (50 ohms), Female Connector
Local Stability Line-up
L: Internal Reference, Local Stability: +/- 50 ppm, L-type
H: Internal Reference, Local Stability: +/- 10 ppm, H-type
S: Internal Reference, Local Stability: +/- 3 ppm, S-type
U: Internal Reference, Local Stability: +/- 1 ppm, U-type
V: Internal Reference, Local Stability: +/- 0.5 ppm, V-type
E: External Reference, E-type
RF Frequency Band
A: 10.95-11.7GHz
B: 11.7-12.2GHz
C: 12.25-12.75GHz
D: 11.2-11.7GHz
G: 12.2-12.75GHz
Product Series Number＊Above Specifications are subject to change without notice.

Reference No.:
DS-R2845

Rev.:

01E

Sheet:4

NJR2845 series
1. Electrical Specifications
#
1.1.

1.2.

Items

Specifications

Absolute Maximum Rating[RF Input Power]-10 dBm (@ CW)[Supply Voltage]+28 V DC

Input RF Frequency Range＜Model No. NJR2845A＞

10.95 to 11.7 GHz＜Model No. NJR2845B＞

11.7 to 12.2 GHz＜Model No. NJR2845C＞

12.25 to 12.75 GHz＜Model No. NJR2845D＞

11.2 to 11.7 GHz＜Model No. NJR2845G＞

12.2 to 12.75 GHz

1.3.

Noise Figure @ +25 ºC

1.4.

Output IF Frequency Range

0.8 dB typ., 1.0 dB max.

＜Model No. NJR2845A＞

950 to 1,700 MHz＜Model No. NJR2845B＞

950 to 1,450 MHz＜Model No. NJR2845C＞

950 to 1,450 MHz＜Model No. NJR2845D＞

950 to 1,450 MHz＜Model No. NJR2845G＞

950 to 1,500 MHz

1.5.

Conversion Gain @ +25 ºC

52 dB min., 57 dB typ.

1.6.

Conversion Gain Ripple @ +25 ºC

2 dBp-p max.
at any 50 MHz segments.

1.7.

Conversion Gain Flatness over Frequency

5 dBp-p max. over Receive Bandwidth@ +25 ºC
1.8.

Output Power @ 1dB G.C.P. (P1dB)

0 dBm min.

@ +25 ºC
1.9.

Output Intercept Point
of 3

1.10.

rd

+5 dBm min.

Order Intermodulation

Tx Signal Immunity[Gain Change]

0.2 dB max.

[Noise Figure Change]

0.1 dB max.
at -20 dBm Tx Input (13.75 to 14.5 GHz)

1.11.

Local Oscillator Frequency＜Model No. NJR2845A＞

10 GHz nom.

＜Model No. NJR2845B＞

10.75 GHz nom.

＜Model No. NJR2845C＞

11.3 GHz nom.

＜Model No. NJR2845D＞

10.25 GHz nom.

＜Model No. NJR2845G＞

11.25 GHz nom.

＊Above Specifications are subject to change without notice.

Reference No.:
DS-R2845

Rev.:

01E

Sheet:5

NJR2845 series
#
1.12.

Items

Specifications

Local Oscillator Frequency Stability*Initial Setting Error and Temperature Stability(-40 to +60 ºC)

1.13.

＜L-type Model＞+/-50 ppm max.

＜H-type Model＞+/-10 ppm max.

＜S-type Model＞+/-3 ppm max.

＜U-type Model＞+/-1 ppm max.

＜V-type Model＞+/-0.5 ppm max.

＜E-type Model＞

Same as External Reference Stability

L.O. Phase Noise (SSB)-50 dBc/Hz typ. @ 100 Hz-70 dBc/Hz typ. @ 1 kHz-75 dBc/Hz typ. @ 10 kHz-85 dBc/Hz typ. @ 100 kHz-105 dBc /Hz typ. @ 1 MHz
In case of E-type, depend on External Reference
Stability

1.14.

Requirement for External Reference(Only E-type Specified)[Input Port]IF Output Interface Connector(Combine reference with IF Signal)[Frequency]

10 MHz (sine-wave)[Input Power]-10 to 0 dBm @IF Output connector[Phase Noise]-125 dBc /Hz max. at 100 Hz-135 dBc /Hz max. at 1 kHz-140 dBc /Hz max. at 10 kHz(Input Condition)

1.15.

Spuriousa) -120 dBm max.
at input, Fixed frequency spur, unrelated totest CW signal.
b) -40 dBc typ., -30 dBc max.
with test CW signal -10 dBm IF output

1.16.

Local Oscillator Leakage Levels-40 dBm max. at the IF Output Connector.
-60 dBm max. at the RF Input Flange.

1.17.

Image Rejection

40 dB min.

1.18.

Input V.S.W.R.

2.5 : 1 typ.

1.19.

Output Impedance<N-type Model>

50 ohms nom<F-type Model>

75 ohms nom.

＊Above Specifications are subject to change without notice.

Reference No.:
DS-R2845

Rev.:

01E

Sheet:
6

NJR2845 series
#

Items

1.20.

Output V.S.W.R.

1.21.

Power Requirement

Specifications
2.3 : 1 max.
[Input Port]IF Output Interface Connector(Combine DC Power with Output IF Signal)[Input Voltage]+10 to +24 VDC[Current Drain]<L/H/S/U/V-type>

170 mA max.

<E-type>

200 mA max.

＊Above Specifications are subject to change without notice.

Reference No.:
DS-R2845

Rev.:

01E

Sheet:7

NJR2845 series
2. Mechanical Specifications
#

Items

2.1.

RF Input Interface

2.2.

IF Output Interface

2.3.
2.4.

Specifications
Waveguide, WR-75 (with Groove)<N-type Model>

Coaxial Connector , N-type Female - 50 ohms

<F-type Model>

Coaxial Connector , F-type Female - 75 ohms

Dimension & Housing

82.2 (L) x 40 (W) x 40 (H) mm

without Interface Connector[3.24” (L) x 1.57” (W) x 1.57” (H) ]Weight<F-type Model>

210 g [0.46 lbs]

<N-type Model>

240 g [0.53 lbs]

3. Environmental Specifications
#
3.1.

Items

Specifications

Temperature Range (Ambient)[Operating]-40 to +60 ºC[Storage]-40 to +80 ºC

3.2.

Humidity

0 to 100 % RH

3.3.

Altitude15,000 feet (4,572 m)

3.4.

Vibration (Survival)

5 G [49.03 m/s2] (3 axis, 50 Hz)

3.5.

Shock (Survival)

15 G [147.1 m/s2] (3 axis)

3.6.

Waterproof / Dustproof

IP 67(IP Code Rating)
3.7.

Regulations

EU Directive (CE Marking)RE - 2014/53/EU
EMC - 2014/30/EU
RoHS - 2011/65/EU + (EU)2015/863
Safety: EN62368-1, EN60950-22

3.8.

MTBF

150,000 hours and more at +60 ºC(by Method of Parts Count Reliability

as Design Condition

Prediction)＊Above Specifications are subject to change without notice.

Reference No.:
DS-R2845

Rev.:

01E

Sheet:8

NJR2845 series
4. Outline Drawing
4.1.

F-type Model (e.g. NJR2845AEF)

CAUTION
Items
Sealing Tape

Description
Do not remove the sealing tape on the waveguide.
If the sealing tape is removed, it will lose the performance of waterproof and also it will
become out-of-warranty.

＊Above Specifications are subject to change without notice.

Reference No.:
DS-R2845

Rev.:

01E

Sheet:9

NJR2845 series
4.2.

N-type Model (e.g. NJR2845AEN)

CAUTION
Items
Sealing Tape

Description
Do not remove the sealing tape on the waveguide.
If the sealing tape is removed, it will lose the performance of waterproof and also it will
become out-of-warranty.

＊Above Specifications are subject to change without notice.

Reference No.:
DS-R2845

Rev.:

01E

Sheet:10

NJR2845 series
5. Label
5.1.

Label Outline (e.g. NJR2845AEF)

5.2.

Definitions

Serial Number (OSSSSSRYM) - ALPHANUMERIC (9 characters)
A 0 0 0 0 1 A 1 3
M: Prodctuon Month
Y: Prodctuon Year
R: Revision Number
SSSSS: Running Number
O: Overflow Number
O: Overflow Number - ALPHABET (1 character)"A" to "T" except "I" and "O", e.g.: A99999 ⇒ B00001"V" to "Z": Specified Numbers
SSSSS: Running Number - NUMBER (5 digits)"00001" to "99999"
R: Revision Number - ALPHABET (1 character)"A" to "Z" except "I", "O", and "U"
Y: Prodctuon Year - NUMBER (1 digits)"0" to "9", Last Digit of Calender Number
e.g.: 2021:"1", 2022:"2", 2023:"3"・・・・
M: Prodctuon Month - ALPHANUMERIC (9 characters)"1" to "9", "X" as October, "Y" as November, "Z" as December＊Above Specifications are subject to change without notice.

Reference No.:
DS-R2845

Rev.:

01E

Sheet:
11

NJR2845 series
6. Package
6.1.

Individual Package / Shipping Package

6.2.

Enclosed Accessories
O-ring, Qty (1), for Waveguide Flange

Screw, Qty (4), M4 x 12 mm, Phillips Head with Spring Washer and Flat Washer, SUS＊Above Specifications are subject to change without notice.

Reference No.:
DS-R2845

Rev.:

01E

Sheet:
12

NJR2845 series
7. Handling Precautions
7.1.

DANGER

This statement indicates an imminently hazardous situation which, if not avoided, will result indeath or serious injury.
Items
Input Voltage

Description
Only input a DC voltage within the range indicated in specifications.
Do operate with the input voltage range between +10 and +24 V DC power.
When applying higher voltage than specifications (+28 V as maximum value of
input voltage in power requirement), it will not only cause this unit failure, but it
may also result in electric shock and fire.

Disassembling

Do not disassemble the unit.
Disassembling will not only cause this unit failure, but it may also result inelectric shock.

7.2.

CAUTION

This statement indicates a potentially hazardous situation which, if not avoided, could result inminor or moderate injury. The statement may also be used to indicate other unsafe practices orrisks of property damage.
Items
Disposal

Description
This unit contains gallium arsenide (GaAs), classified as a harmful substance. To
avoid danger, do not incinerate, crush, or chemically treat the unit in such a waythat gases or dust are released.
When disposing the unit, comply with all applicable laws and regulations and do
not treat it as general industrial waste or household waste.

7.3.

NOTE

This statement is used to notify of installation, operation, or maintenance information that is
important, but not hazard-related.
Items

Description

TorqueDo not tighten with excessive torque when attaching screws/bolts and connectors.

Management

The following value as tighten torque is recommended.


Screws/Bolts - M4: 1.15 to 1.4 N⋅m

IF Connector (N-type / F-type): 0.68 to 1.13 N⋅m＊Above Specifications are subject to change without notice.

Reference No.:
DS-R2845

Rev.:

01E

Sheet:13

NJR2845 series
Items

Description

Weatherproof

The unit mounted in outdoor should be conducted with adequately weatherproof
procedure.
Do seal all of cable connection points from the connector to the cable sheath byusage of self-amalgamating tape.
Ensure the waveguide connection is properly assembled with the enclosed
o-ring gasket as accessories. The o-ring gasket is full-type and it is assumed toconnect the unit to a flat waveguide flange.

Waveguide

Do not remove the sealing tape on the waveguide.

Sealing Tape

If the sealing tape is removed, it will lose the performance of waterproof andalso it will become out-of-warranty.

Input Voltage

Do operate with the input voltage range between +10 and +24 V DC power.
Avoid applying more than the maximum voltage in this range (including ripple
voltage) under any conditions.

Input RF Signal

Do not supply the input RF signal over the absolute maximum rating indicated inPowerspecifications (-10 dBm @ CW / +10 dBm @ Pulse).

Input 10MHz

The 10 MHz reference signal should be supplied with the range between -10 and

Signal Power

0 dBm with sine-wave for correctly operation.
Do not supply the signal level of more than +13 dBm.

High

It may cause damage and/or degradation of reliability / lifetime to operate theTemperatureunit in a condition where the ambient temperature exceeds the maximum value,

Operation+60 °C, at operating temperature described in the specifications.

Vibration

When vibration and/or shock impact exceeding the conditions described in the/ Shock

specifications is applied, internal parts may be damaged.

Warranty

The unit is covered by a warranty for one(1) year following delivery unlessotherwise stipulated in the contract or delivery conditions.
Repairs may be possible under payment of charge even for the unit whose
warranty period has expired.
Opening, removing, disassembling and modifying any parts and components(including the product label, sealing tape and screws) without fan equipment
will immediately void the warranty.
In any case, the unit of invalid warranty cannot be repaired.

＊Above Specifications are subject to change without notice.

Reference No.:
DS-R2845

Rev.:

01E

Sheet:14

NJR2845 series
8. Instructions Manual
8.1.

Descriptions
This section describes the information of connectors and etc.
RF Input Waveguide

Items

IF Output Connector

Description

PurposeRF Input

Waveguide: WR-75

The LNB receives an RF signal (Ku-band: frequency

Waveguide

Flange: Square Cover

divided by region band from the 10.75 to 12.75 GHz) via

Groovedthis waveguide.

(Equivalent to PBR 120)

8.2.

IF Output

F-type Female Coaxial

The LNB outputs an IF signal of L-band (950 to 1,700

Connector

Connector, 75 Ohms

MHz) and requires to supply +10 to +24 V DC power via

ORthis connector.

N-type Female Coaxial

In case of E-type, the external 10MHz reference requires

Connector, 50 Ohms

to be input.

Connection and Installation
This section describes basic installation for the LNB.

8.2.1. Mounting Configuration
The Unit can be mounted with OMT or the waveguide filter of the satellite antenna.
When mounting with the OMT or the waveguide filter, the following steps should be complied:
Step 1:

Verify that the groove on the waveguideflange for a gasket is clean.
The enclosed o-ring gasket as accessories
is full-type and it is assumed to connect
the LNB to a flat waveguide flange (nongrooved waveguide flange). Insert theo-ring gasket the groove as shown in the
figure on the right. The o-ring gasket andflange groove dimensions is customized
and optimized for this LNB; therefore anyother o-ring gasket than the enclosed
accessory is not permitted for using.
Do not remove the sealing tape on the
waveguide.

＊Above Specifications are subject to change without notice.

Reference No.:
DS-R2845

Rev.:

01E

Sheet:15

NJR2845 series
Step 2:

Secure the OMT or the filter to the LNB by tightening the enclosed Phillips head screws(M4 x 12 mm) with 1.15 to 1.4 N⋅m torque as shown in the figure below, when the
thickness of the flange of the OMT or filter isassumed to be 5 to 7 mm.
The enclosed washers as accessory must be
inserted to bolts before tightening bolts.
When the thickness is other than 5 - 7 mm,
the appropriate length screws or bolts based
should be prepared on the table on the right.

Flange Thickness

Screw

of OMT/Filter

Length3 to 5 mm

10 mm

5 to 7 mm

12 mm

7 to 9 mm

14 mm

9 to 11 mm

16 mm

8.2.2. Connecting Coaxial Cable
The LNB is connected the modem with a coaxial cable, and requires to supply +10 to +24 V DC power
and a 10 MHz reference from the modem.
The connection of coaxial cable should be complied with the following steps:
Step 1:Connect the coaxial cable with the N or F-type male connectors to the coaxial connecter
equipped with the LNB which is shown in the figure on the right below under 0.68 to
1.13 N⋅m tighten torque.

Step 2:

Use self-amalgamating tape to seal connector and cable entry points from theconnector to the cable sheath.
Do not power on the modem before finishing all of steps of Connecting Coaxial Cable.

＊Above Specifications are subject to change without notice.

Reference No.:
DS-R2845

Rev.:

01E

Sheet:
16

NJR2845 series
8.2.3. Start-up
Start-up will be immediately performed with the following step:
Step:



Power on the modem and supply the DC voltage and 10 MHz reference from modem.

Only input a DC voltage within the range indicated in specifications.
Do operate with the input voltage range between +10 and +24 V DC power.
When applying higher voltage than specifications (+28 V as absolute maximum rating), it will
not only cause this unit failure, but it may also result in electric shock and fire.



The 10 MHz reference signal should be supplied with the range between -10 and 0 dBm withsine-wave for correctly operation.
Do not supply the signal level of more than +13 dBm.



Do not power on the modem before finishing all of steps of Connecting Coaxial Cable.



The LNB must be adequately weatherproofed to place in outdoor.
Ensure that the waveguide joint is properly sealed with the enclosed o-ring gasket.

Do seal all of cable connection points from the connector to the cable sheath by usage ofself-amalgamating tape.

＊Above Specifications are subject to change without notice.

Reference No.:
DS-R2845

Rev.:

01E

Sheet:
17