AOR LN4000 User manual

LOW NOISE AMPLIFIER
LN4000
OPERATING MANUAL
THIS AMPLIFIER IS FOR RECEIVER ONLY.
DO NOT USE WITH TRANSMITTER!
May 18, 2011

１
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．．
． INTRODUCTION
The LN4000 is a high-performance, low-noise wide-band preamplifier for 100MHz to 3000MHz
The LN4000 is a general p rpose amplifier that can be sed with scanner receivers as well as with
other devices s ch as freq ency co nter, spectr m analyzer etc…
SPECIFICATIONS
MODEL LN4000 Wide-band low-noise pre-amplifier
Freq ency coverage 100MHz to 3000MHz
Maxim m sable freq ency 4000MHz (3dB less gain compared with the gain at
100MHz)
Gain 20dB±2dB
Noise fig re 4.5dB
Device Silicon Monolithic IC
Inp t / O tp t impedance 50Ω
Inp t / O tp t connector type SMA-J
Operating temperat re range -40 degree C to +85 degree C
Power Req irements 5.0 to 12VDC
Power Cons mption Approx. 26mA @ 8VDC
Size 25.5mm(W) x 21mm(D) x 13mm(H)
Weight Approx. 15g
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE FOR PRODUCT IMPROVEMENT.

3. INCLUDED IN THIS PACKAGE
The following items are provided in this package.
Pict re
No. Description / Item Part N mber Q antity
(1) LN4000 Main Unit LN4000 1
(2) BNC-SMA Adapter SMAP-BNCJ 2
(3) Coaxial Cable with SMA-P CC-SMA-4000 2
(4) DC Power Cable DC-4000 1
(5) Operating man al (this booklet) INS-4000-DOC 1
NOTE: Pr -ass mbl d coaxial cabl with SMA plugs (3) is provid d for conv ni nc wh n installing th
LN4000 in th r c iv r. Th SMA-BNC adapt r (2 ) is us d for th conn ction of BNC cabl .
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(1)
(2) (3)
(4)
(5)

4. INSTALLTION AND OPERATION
LN4000 is a pre-amplifier for receiver/scanner.
Never connec he LN4000 o a ransmi er, or ransceiver in ransmi s a e.
Connect antenna (signal so rce) and receiver as shown below. Use s pplied SMA-BNC adapter or
pre-assembled coaxial cable with SMA connectors.
DC Cable with DC Ja k.
Use s pplied DC cable to feed the DC power to the LN4000. Connect wires (black / black-red) to
the reg lated DC power s pply. Black lead sho ld be connected to the negative (-) side of the power
s pply, and black-red lead sho ld be connected to the positive (+) side of the power s pply.
Altho gh the LN4000 operates at 12VDC, se medi m voltage (8VDC to 9VDC) if power s pply is
adj stable type. Excessive voltage above 12VDC may damage LN4000.
Commercially available SMA(P)-BNC(P) adapter is convenient when installing the LN4000 to a
receiver with BNC Jack.
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To re eiver (OUT) From antenna (IN）
））
）
Re eiver

The LN4000 can be sed with post-amplifier for the spectr m analyzer and freq ency co nter. The
LN4000 can be mo nted directly to those instr ments with coaxial adapter as shown example below.
The following example shows sample meas rement when LN4000 is sed as pot-amplifier for the
spectr m analyzer.
NO AMPLIFICATION WITH LN4000
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Spe trum analyzer / frequen y ounter

NO AMPLIFICATION WITH LN4000
NOTE: Th abov sampl m asur m nts includ conn ctor and cabl loss.
5. OPERATIONAL HINTS
The LN4000 is a wideband amplifier with very flat gain characteristic. This means that the
LN4000 amplifies weak signals. At the same time it amplifies strong signals within a freq ency
range. This may degrade the receiver’s front-end characteristics.
It is highly recommended to se the LN4000 with an appropriate band-pass-filter, notch-filter etc., to
reject nearby strong signals. It is highly recommended to se a single freq ency antenna (not a
wideband antenna) if LN4000 is sed to improve the reception for a selected freq ency.
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6. LIMITED WARRANTY (USA only)
AOR USA, Inc. (AOR) warrants its receivers as described below:
AOR will repair or exchange eq ipment as a res lt of defects in parts or workmanship for a period of
one year from the date of original retail p rchase from an a thorized AOR dealer.
Excl sions
The following items are not covered by the AOR limited warranty:
1. Prod cts that are damaged thro gh accident, ab se, mis se, neglect, or ser modifications.
2. Problems that arise thro gh fail re to follow directions in the owner’s man al.
3. Expos re of the prod ct to adverse or severe weather conditions, incl ding lightening,
temperat re, extremes or water, incl ding rainfall or immersion.
4. Expos re to toxic materials, biohazards, radioactive materials or other contamination.
5. Repairs attempted by parties other than AOR or its a thorized personnel.
6. Damage that res lts from improper installation, incl ding improper voltage and/or reversed
polarity, or expos re of a receiver to signal levels exceeding specifications.
7. Damage res lting thro gh the se of accessories from man fact rers other than AOR.
8. Eq ipment that has had serial n mbers removed or altered in any way.
9. Damage that occ rred as a res lt of shipment. Claims m st be presented to the carrier.
10. AOR is not responsible for any costs arising from installation or reinstallation of the eq ipment,
nor for any conseq ential (s ch as loss of se) damage claims.
Obtaining Warranty Service
1. Yo are responsible for shipping the prod ct to AOR and any related costs.
2. Warranty claim m st be accompanied by a legible copy of the original prod ct p rchase receipt.
3. Yo m st incl de a description of the problem(s) enco ntered with the prod ct.
4. Yo m st incl de yo r name, a valid gro nd shipping address (incl ding zip code) and
telephone contact information.
5. AOR will ship the repaired (or replaced) prod ct by gro nd transport.
Limitations
Any and all implied warranties, incl ding those pertaining to merchantability and tility for a
specific p rpose are limited to the d ration of this limited warranty.
AOR’s limits on warranty pertain only to the repair or, at its option, replacement of defective
prod cts. AOR shall not be liable for any other damages, incl ding conseq ential, incidental or
otherwise, arising from any defect.
Some states do not allow limitations on how long an implied warranty lasts and may not allow the
excl sion of incidental or conseq ential damages. As s ch, the above limitations may not apply in
every case. This warranty gives yo specific legal rights and yo may have other rights that apply in
yo r state.
If yo have q estions abo t this limited warranty, or the operation of yo r AOR prod ct, contact
AOR at [phone] d ring normal b siness ho rs (9 am ~ 5 pm Pacific Time Zone), or write to
AOR, 20655 S. Western Ave., S ite 112, Torrance, CA 90501. Yo may also send a fax to AOR at
[phone]. Additional information is available at the AOR web site: www.aor sa.com
We s ggest attaching yo r p rchase receipt to this half of the warranty card and keeping this
information in a sec re location.
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AOR Model N mber __________________________
Serial N mber ________________________________
Dealer Name _________________________________
P rchase Date ________________________________
Manufactur r: AOR, LTD.
2-6-4, Misuji, Taito-Ku,
Tokyo, 111-0055, Japan
URL: www.aorja.com
-mail: [e-mail]
US distributor: AOR USA, INC.
20655 S. W st rn Av . Suit 112
Torranc , CA 90501
Phon : 310-787-8615
Fax: [phone]
URL: www.aorusa.com
-mail: [email protected]
Printed in Japan