Nisshinbo Micro Devices NJS8486 Series User manual

Date
May 23, 2023
- Specification -
C-band PLL LNB
Internal & External Reference Model
Model No. NJS8486 series
Model No.
RF Frequency
Local Frequency
IF Frequency
NJS8486 series
3.4 to 4.2 GHz
5.15 GHz
950 to 1,750 MHz
NJS8487 series
3.625 to 4.2 GHz
5.15 GHz
950 to 1,525 MHz
NJS8488 series
4.5 to 4.8 GHz
5.76 GHz
960 to 1,260 MHz
Local Reference Type: Internal / External Reference
Local Stability: H-type, +/- 10 ppm (+/- 50 kHz typ.)
S-type, +/- 3 ppm (+/- 15 kHz typ.)
U-type, +/- 1 ppm (+/- 5 kHz typ.)
E-type, Same as External Reference Stability
RF Input Interface: Waveguide, CPR-229G
IF Output Interface: N-type / F-type, Female Connector
DC Power Input: IF Output Interface Connector
DC Power Voltage Range: +12 to +24 V
Copyright©
Nisshinbo Micro Devices Inc.
Microwave Business Headquarters
-Notice of Proprietary Information-
This 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.
Microwave Business Headquarters
Title:
Datasheet of NJS8486 series
Reference No.:
DS-S8486
Rev.:
17E
Sheet:
1 / 17
Discontinued

NJS8486 series
＊Above Specifications are subject to change without notice.
Reference No.:
DS-S8486
Rev.:
17E
Sheet:
2
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 (hereinafte r, “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 for
any injuries, accidents, or social repercussions resulting from the product being in a poor or damaged state because it was
used 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 to
repair 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 not
responsible
In addition, the product warranty is limited to the provision of repair services or replacement at no cost. It does not cover
secondary damage (to equipment, business opportunities, profits, etc.) or any other damage that may have resulted from
failure of the product.
4. The product must be handled appropriately to ensure its continued reliability. Since it can be damaged by the intrusion of
water, dust, oil, chemicals, etc., it must be given appropriate protection. Even in the case of a product with an airtight
construction, avoid using it in an environment that exceeds the stated levels of waterproofing/dustproofing. Also, be sure to
use connectors and waveguides properly.
If replacement parts such as fans are included, proper maintenance is necessary. To maintain product performance and
functionality, 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 the
time 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 (aerospace
equipment, 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 all
applicable 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 and
foreign 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.
Caution

NJS8486 series
＊Above Specifications are subject to change without notice.
Reference No.:
DS-S8486
Rev.:
17E
Sheet:
3
Scope
This LNB is designed for the low noise amplifier and block downconverter intended for the satellite
communication data downlink application in C-band. It is combined a 3-stage HEMT amplifier and a block
downconverter with a phase locked local oscillator (5.15 GHz or 5.76 GHz) which is synchronized with
internal high stability TCXO reference or external 10MHz reference.
The LNB receives an RF signal (C-band: 3.4 to 4.2 GHz, 3.625 to 4.2 GHz, or 4.5 to 4.8 GHz) as input,
downconverts from the RF signal to an IF signal (L-band: 950 to 1,750 MHz, 950 to 1,525 MHz, or 960 to
1,260 MHz), and outputs the IF signal. It is operated by +24 V DC power (range: +12 to +24 V) input.
The LNB comes in a single, weatherized housing rated for outdoor use, and has a CPR-229G waveguide
flange as RF input and an either an N-type or F-type female connector as IF output.
Fig.1 Functional Block Diagram

NJS8486 series
＊Above Specifications are subject to change without notice.
Reference No.:
DS-S8486
Rev.:
17E
Sheet:
4
Series Model Number
Numbering System
Line-up

NJS8486 series
＊Above Specifications are subject to change without notice.
Reference No.:
DS-S8486
Rev.:
17E
Sheet:
5
1. Electrical Specifications
#
Items
Specifications
1.1. Absolute Maximum Rating
[RF Input Power]
[Supply Voltage]
-10 dBm (@ CW), +10 dBm (@ Pulse)
+28 V DC
1.2.
Input RF Frequency Range
＜Model No. NJS8486＞
3.4 to 4.2 GHz
＜Model No. NJS8487＞
3.625 to 4.2 GHz
＜Model No. NJS8488＞
4.5 to 4.8 GHz
1.3.
Noise Temperature @ +25 ºC
15 K typ., 30 K max.
1.4.
Output IF Frequency Range
＜Model No. NJS8486＞
950 to 1,750 MHz
＜Model No. NJS8487＞
950 to 1,525 MHz
＜Model No. NJS8488＞
960 to 1,260 MHz
1.5.
Conversion Gain @ +25 ºC
59 dB min., 66 dB max.
1.6. Conversion Gain Ripple @ +25 ºC 2 dBp-p max.
At any 50 MHz segments.
1.7. Conversion Gain Flatness over Frequency
@ +25 ºC
＜Model No. NJS8486＞
7 dBp-p max. over 800 MHz BW
＜Model No. NJS8487＞
5 dBp-p max. over 575 MHz BW
＜Model No. NJS8488＞
4 dBp-p max. over 300 MHz BW
1.8.
Conversion Gain Variation over Temperature
5 dB max.
1.9.
Output Power @ 1dB G.C.P. (P1dB)
+3 dBm min.
1.10. Intermodulation Products
(3rd order Intermodulation rejection with two
-75 dBm input carriers separated by 10 MHz.)
45 dB min.
1.11.
Output Intercept Point
+13 dBm min.
1.12.
Local Oscillator Frequency
＜Model No. NJS8486＞
5.15 GHz nom.
＜Model No. NJS8487＞
5.15 GHz nom.
＜Model No. NJS8488＞
5.76 GHz nom.
1.13. Local Oscillator Frequency Stability
*Initial Setting Error and
Temperature Stability (-40 to +60 ºC)
＜H-type Model＞
+/-10 ppm max.
＜S-type Model＞
+/-3 ppm max.
＜U-type Model＞
+/-1 ppm max.
＜E-type Model＞
Same as External Reference Stability

NJS8486 series
＊Above Specifications are subject to change without notice.
Reference No.:
DS-S8486
Rev.:
17E
Sheet:
6
#
Items
Specifications
1.14. Requirement for External Reference
(Only E-type Specified)
[Input Port]
[Frequency]
[Input Power]
[Phase Noise]
IF Output Interface Connector
(Combine reference with IF Signal)
10 MHz (sine-wave)
-10 to 0 dBm @IF Output connector
-135 dBc/Hz max. at 100 Hz
-143 dBc/Hz max. at 1 kHz
-145 dBc/Hz max. at 10 kHz
(Input Condition)
1.15. L.O. Phase Noise (SSB) -70 dBc/Hz typ., -63 dBc/Hz max. @ 100 Hz
-80 dBc/Hz typ., -73 dBc/Hz max. @ 1 kHz
-85 dBc/Hz typ., -83 dBc/Hz max. @ 10 kHz
-95 dBc/Hz typ., -90 dBc/Hz max. @ 100 kHz
-105 dBc/Hz typ., -100 dBc/Hz max. @ 1 MHz
1.16. Spurious a) -140 dBm max.
at input, Fixed frequency spur, unrelated to
test CW signal. (Measured at specified IF
band: 950 to 1,750 MHz, 950 to 1,525 MHz,
or 960 to 1,260 MHz)
b) -55 dBc max.
with test CW signal -10 dBm IF output
(Measured at specified IF band: 950 to
1,750 MHz, 950 to1,525 MHz, or 960 to
1,260 MHz)
1.17.
Image Rejection
60 dB min.
1.18.
Output Impedance
<N-type Model>
50 ohms nom
<F-type Model>
75 ohms nom.
1.19.
Output V.S.W.R.
2.5 : 1 max.
1.20. Power Requirement
[Input Port]
[Input Voltage]
[Current Drain]
<Internal Reference Model>
<External Reference Model>
IF Output Interface Connector
(Combine DC Power with Output IF Signal)
+12 to +24 VDC
350 mA max.
400 mA max.

NJS8486 series
＊Above Specifications are subject to change without notice.
Reference No.:
DS-S8486
Rev.:
17E
Sheet:
7
2. Mechanical Specifications
#
Items
Specifications
2.1.
Input Waveguide Flange
Waveguide, CPR-229G (with Groove)
2.2.
IF Interface Connector
<F-type Model>
Coaxial Connector , F-type Female - 75 ohms
<N-type Model>
Coaxial Connector , N-type Female - 50 ohms
2.3. Dimension & Housing
without Interface Connector
80.8 (L) x 99.6 (W) x 76 (H) mm
[3.18” (L) x 3.92” (W) x 2.99” (H) ]
2.4. Weight 800 g
[1.76 lbs]
3. Environmental Specifications
#
Items
Specifications
3.1. Temperature Range (Ambient)
[Operating]
[Storage]
-40 to +60 ºC
-40 to +80 ºC
3.2.
Humidity
0 to 100 % RH
3.3.
Altitude
15,000 feet (4,572 m)
3.4.
Vibration (Survival)
5 G [49.03 m/s
2
] (3 axis, 50 Hz)
3.5.
Shock (Survival)
15 G [147.1 m/s
2
] (3 axis)
3.6. Waterproof / Dustproof
(IP Code Rating)
IP 67
3.7. Regulations EU Directive (CE Marking)
EMC - 2014/30/EU
RoHS - 2011/65/EU + (EU)2015/863
Safety: EN60950-1
3.8. MTBF
(by Method of Parts Count Reliability
Prediction)
150,000 hours and more at +60 ºC
as Design
Condition

NJS8486 series
＊Above Specifications are subject to change without notice.
Reference No.:
DS-S8486
Rev.:
17E
Sheet:
8
4. Outline Drawing
4.1. F-type Model (e.g. NJS8486E)

NJS8486 series
＊Above Specifications are subject to change without notice.
Reference No.:
DS-S8486
Rev.:
17E
Sheet:
9
4.2. N-type Model (e.g. NJS8486EN)

NJS8486 series
＊Above Specifications are subject to change without notice.
Reference No.:
DS-S8486
Rev.:
17E
Sheet:
10
5. Label
5.1. Label Outline (e.g. NJS8487S)
5.2. Definitions
Serial Number (OSSSSSRYM) - ALPHANUMERIC (9 characters)
A00001A13
M: Prodctuon Month
Y: Prodctuon Year
R: Revis io n 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

NJS8486 series
＊Above Specifications are subject to change without notice.
Reference No.:
DS-S8486
Rev.:
17E
Sheet:
11
6. Package
6.1. Individual Package / Shipping Package

NJS8486 series
＊Above Specifications are subject to change without notice.
Reference No.:
DS-S8486
Rev.:
17E
Sheet:
12
6.2. Enclosed Accessories
O-ring Gasket, Qty (1), Full-type, for Waveguide Flange
Bolts, Qty (10), #1/4-20UNC L = 5/8”, Hexagon Head, SUS
Spring Washers, Qty (10), SUS

NJS8486 series
＊Above Specifications are subject to change without notice.
Reference No.:
DS-S8486
Rev.:
17E
Sheet:
13
7. Handling Precautions
7.1. DANGER
This statement indicates an imminently hazardous situation which, if not avoided, will result in
death or serious injury.
Items
Description
Input Voltage Only input a DC voltage within the range indicated in specifications.
Do operate with the input voltage range between +12 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.
Disassembling Do not disassemble the unit.
Disassembling will not only cause this unit
failure, but it may also result in
electric shock.
7.2. CAUTION
This statement indicates a potentially hazardous situation which, if not avoided, could result in
minor or moderate injury. The statement may also be used to indicate other unsafe practices or
risks of property damage.
Items
Description
Disposal 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 way
that 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
Torque
Management
Do not tighten with excessive torque when attaching screws/bolts and connectors.
The following value as tighten torque is recommended.
Screws/Bolts - #1/4-20UNC: 5.11 to 5.24 N⋅m

IF Connector (N-type / F-type): 0.68 to 1.13 N⋅m

NJS8486 series
＊Above Specifications are subject to change without notice.
Reference No.:
DS-S8486
Rev.:
17E
Sheet:
14
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 by
usage 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 to
connect the unit to a grooved waveguide flange.
Input Voltage Do operate with the input voltage range between +12 and +24 V DC power.
Avoid applying more than the maximum voltage in this range (including ripple
voltage) under any conditions.
Input RF Signal
Power
Do not supply the input RF signal over the absolute maximum rating indicated in
specifications (-10 dBm @ CW / +10 dBm @ Pulse).
Input 10MHz
Signal Power
The 10 MHz reference signal should be supplied with the range between -10 and
0 dBm with sine-wave for correctly operation.
Do not supply the signal level of more than +13 dBm.
High
Tempe rature
Operation
It may cause damage and/or degradation of reliability / lifetime to operate the
unit in a condition where the ambient temperature exceeds the maximum value,
+60 °C, at operating temperature described in the specifications.
Vibration
/Shock
When vibration and/or shock impact exceeding the conditions described in the
specifications is applied, internal parts may be damaged.
Warranty The unit is covered by a warranty for one(1)
year following delivery unless
otherwise 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.

NJS8486 series
＊Above Specifications are subject to change without notice.
Reference No.:
DS-S8486
Rev.:
17E
Sheet:
15
Verify that the groove on the
waveguide flange for a gasket is
clean. The enclosed gasket as
accessories is full-type and it is
assumed to connect the LNB to a
grooved waveguide flange. Insert
the gasket the groove as shown
in the figure on the right.
8. Instructions Manual
8.1. Descriptions
This section describes the information of connectors and etc.
Items
Description
Purpose
RF Input
Waveguide
Waveguide: WR-229
Flange: CPR-229G
(with Groove)
The LNB receives an RF signal of C -
band (3.4 to
4.2 GHz, 3.625 to 4.2 GHz, or 4.5 to 4.8 GHz) via this
waveguide.
IF Output
Connector
F-type Female Coaxial
Connector, 75 Ohms
OR
N-type Female Coaxial
Connector, 50 Ohms
The LNB outputs an IF signal of L-band
(950 to
1,750 MHz, 950 to 1,525 MHz or 960 to 1,260 MHz) and
requires to supply +12 to +24 V DC power via this
co n n e c t o r.
For external reference models, a 10 MHz reference
signal must be supplied.
8.2. 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:

NJS8486 series
＊Above Specifications are subject to change without notice.
Reference No.:
DS-S8486
Rev.:
17E
Sheet:
16
Flange Thickness
of OMT/Filter
Screw
Length
4 to 7 mm
[0.15” to 0.275”]
1/2”
7 to 10 mm
[0.275” to 0.4”]
5/8”
10 to 13 mm
[0.375” to 0.525”]
3/4”
Step 2: Secure the OMT or the filter to the LNB by
tightening the enclosed hexagon head bolts
(#1/4-20UNC L = 5/8”) with 5.11 to 5.24 N⋅m
torque as shown in the figure below, when the
thickness of the flange of the OMT or filter is
assumed to be 7 to 10 mm. The enclosed
washers as accessory must be inserted to bolts
before tightening bolts.
When the thickness is other than 7 - 10 mm,
the appropriate length screws or bolts based
should be prepared on the table on the right.
8.2.2. Connecting Coaxial Cable
The LNB is connected the modem with a coaxial cable, and requires
to supply +12 to +24 V DC power from the modem. For external
reference models, a 10 MHz reference signal shall be supplied.
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 the connector to the cable
sheath.
Do not power on the modem before finishing all of steps of Connecting Coaxial Cable.

NJS8486 series
＊Above Specifications are subject to change without notice.
Reference No.:
DS-S8486
Rev.:
17E
Sheet:
17
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 +12 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 with
sine-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 of
self-amalgamating tape.