AOR AR2300 User manual

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AR2300 BLACK-BOX RECEIVER
OPERATING MANUAL
OCTOBER 28, 2020
AOR, LTD.
www.aorja. om

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1
INTRODUCTION
Thank you for pur hasing the AR2300.
AR2300 is a high-end bla k-box type re eiver with wide band overage between 40kHz and 3.15GHz. Some of its
outstanding features are:
1) Digital signal processing:
Input signals after the 45.05MHz IF are onverted from analog to digital by a DSP pro essor. There is no AGC in
the analog pro essing unit, as all pro essing, in luding AGC, is done by DSP.
2) High-performance analog front-end:
Analog signal pro essing is performed by a omputer simulated, high-performan e distribution onstant filter.
3) DDS local oscillator:
Instead of the onventional PLL method, the first lo al frequen y is produ ed by dire t digital synthesis. That
method allows frequen y swit hing at high speed.
4) IF output:
An analog IF of 15MHz (+/-7.5MHz) bandwidth is output.
5) ptional digital I/Q output:
A digital I/Q signal of 0.9MHz is output via a USB 2.0 interfa e.
6) High precision frequency reference:
0.01ppm frequen y stability of the 10MHz internal master os illator is a hieved when using the optional GPS
re eiver unit.
7) FFT analyzer:
Thanks to the onboard FFT pro essor, 10MHz wide spe trum data an be output at high speed via serial.
8) ptional APC 25 Phase 1 digital voice demodulation
9) Video demodulation
By onne ting and external TV monitor, it is possible to demodulate the signal of FM modulation se urity
ameras and analog TV broad asts. When you onne t the TV monitor, you an he k the demodulated video.
Not ompatible with digital terrestrial television.
10) Simultaneous monitoring
2 band re eption, offset re eption, triple re eption (restri tions apply).
11) SD card slot
You an re ord the re eived audio on SD, as well as ba king up re eiver settings and memory data.
12) 12kHz analog I/Q output
Allows DRM broad asts de oding via a PC and dedi ated 3rd party software.
13) HF direct sampling
When re eiving HF signals, the signals are onverted dire tly to digital without entering the mixer. This allows
very good linearity hara teristi s.
14) Control via LAN/Internet with optional ARL2300 Ethernet Controller
Please read this operating manual arefully. This information will allow you to enjoy maximum performan e from
your re eiver. Due to ontinuous developments of the re eiver, firmware and software, we a knowledge that there
might be some hanges, errors or omissions.
We sin erely hope that the AR2300 will be your monitoring ompanion for many years to ome.

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SAFETY PRECAUTIONS
DO NOT operate the re eiver near unshielded ele tri al blasting aps or in an explosive atmosphere. This ould ause
an explosion and death.
DO NOT operate the re eiver with a headset or other audio a essories at high volume levels. If you experien e a
ringing in your ears, redu e the volume or dis ontinue use.
DO NOT dire tly apply AC power to the DC so ket on the re eiver rear panel. This ould ause a fire or damage the
re eiver.
DO NOT apply more than 16 V to the DC so ket on the re eiver rear panel. This ould ause a fire or damage the
re eiver.
DO NOT reverse the DC power able polarity. This ould ause a fire or damage the re eiver.
DO NOT let metal, wire or other obje ts onta t the inside of the re eiver, or make in orre t onta t with onne tors
on the rear panel. This ould ause an ele tri sho k or damage the re eiver.
DO NOT operate or tou h the re eiver with wet hands. This ould ause an ele tri sho k or damage to the re eiver.
Immediately turn OFF the re eiver power and remove the power able from the re eiver if it emits an abnormal odor,
sound or smoke. Conta t your AOR dealer or distributor for advi e.
DO NOT put the re eiver on an unstable pla e where the re eiver may suddenly move or fall. This ould ause an injury
or damage the re eiver.
DO NOT operate the re eiver during a lightning storm. It may result in an ele tri sho k, ause a fire or damage the
re eiver. Always dis onne t the power sour e and antenna before a storm.
DO NOT expose the re eiver to rain, snow or any liquids.
DO NOT hange the internal settings of the re eiver. This ould redu e re eiver performan e and / or damage the
re eiver. The re eiver warranty does not over any problems aused by unauthorized internal adjustments.
DO NOT install or pla e the re eiver in a pla e without adequate ventilation.
DO NOT use harsh solvents su h as Benzine or al ohol when leaning, as they will damage the re eiver surfa es.
DO NOT leave the re eiver in areas with temperatures below 0°C or above +50°C.
DO NOT pla e the re eiver in ex essively dusty environments. This ould damage the re eiver.
DO NOT pla e the re eiver against walls or put anything on top of the re eiver. This may overheat the re eiver. The
re eiver will be ome hot when operating the re eiver ontinuously for long periods of time.
Turn OFF the re eiver’s power and / or dis onne t the DC power able when you will not use the re eiver for a long
period of time.
The AR2300 may re eive its own os illated frequen y, resulting in no re eption or only noise re eption in luding on the
spe trum displayed by ontrol software, on some frequen ies.

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TABLE OF CONTENTS
1. Supplied items ........................................................................................................................... 1
2. Front/rear panel description. ..................................................................................................... 2
2.1. Front panel ................................................................................................................................. 2
2.2. Rear panel................................................................................................................................... 3
3. Preparing for PC control ............................................................................................................. 5
3.1. PC requirements ......................................................................................................................... 5
3.2. Conne ting the re eiver to the PC .............................................................................................. 5
3.3. Installing the driver..................................................................................................................... 5
4. Control software operation ........................................................................................................ 7
4.1. Conne ting power ...................................................................................................................... 7
4.2. Power on .................................................................................................................................... 7
4.3. Starting the ontrol software ..................................................................................................... 7
4.4. Software windows des ription ................................................................................................... 8
4.4.1 Main ontrol window des ription .............................................................................................. 9
4.4.2 Spe trum display des ription ................................................................................................... 10
4.4.3 Menu bar des ription ............................................................................................................... 10
4.4.4 Database window des ription .................................................................................................. 13
4.4.5 Des ription of ontrol windows 1 and 2................................................................................... 14
4.4.6 Des ription of ontrol windows 3 and 4................................................................................... 15
4.4.7 Des ription of ontrol window 5 .............................................................................................. 16
4.4.8 Des ription of ontrol window 6 .............................................................................................. 17
5. AR2300 specifications ............................................................................................................... 18

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1. SUPPLIED ITEMS
● AR2300 re eiver ___________________________ 1
● AC power adapter _________________________ 1
● Printed user manual ________________________ 1
● SD ard __________________________________ 1
● USB able ________________________________ 1
● CD with ontrol software and drivers __________ 1
A list of optional a essories is available at:
http://www.aorja. om/a essories/re eiver_a essories.html
AOR software and utilities are listed at:
http://www.aorja. om/support/software.html
A list of 3
rd
party software solutions is available at:
http://www.aorja. om/support/third_party_sw.html

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2. FR NT/REAR PANEL DESCRIPTI N
2.1. Front panel
①
Power swit h
If you need to
dis onne t the AC power adapter, make sure that the re eiver is shut
down before.
②
Status LED Green: Power on and re eiving, Orange/yellow: Stand-by, Not lit: Off
③
Speaker
To mute the
speaker audio
while setting up the re
eiver and ontrol software, simply
plug in a headphone.
④
SD ard
onne tor
Standard size SD Card Conne tor
You an re ord and playba k re eived audio, ba kup and restore memory data and
re eiver settings. Insert the SD ard fa e down. For mi roSD ards, use an SD ard
adapter.
⑤
Headphone
ja k
Three pin 3.5mm, stereo output.
For stereo broad asts, use the FMST re eive mode with 100kHz or 200kHz bandwidth.
In dual-band re eption, the main frequen y is audible on the right hannel, and the
sub-frequen y on the left hannel.
⑥
Video output RCA type so ket (75Ω 1 V p-p) to output the image of a demodulated analog video
signal.

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2.2. Rear panel
①
ANT 1 Type N so ket (50Ω) for frequen ies over 25MHz only.
②
ANT2/HF Type N so ket (50Ω) for all frequen ies, in luding HF.
③
10MHz IN SMA type so ket (50Ω)
External referen e lo k input of 10MHz (2dBm±2dB). When a valid 10MHz is
entered, it automati ally swit hes to that external input.
④
CABLE CLAMP Se ure the DC able with this lamp to avoid the DC onne tor to be pulled out
a identally.
⑤
12V INPUT DC barrel so ket (5.5/2.1mm), enter positive, for power input. DC10.7V〜16V
(2.0A@12V).
⑥
IF OUT
BNC type so ket (50Ω)
Outputs analog IF at 45.05MHz with a bandwidth of +/- 7.5MHz.
(Output level is +10dBm relative to antenna input)
⑦
ACC
Mini-DIN-8 so ket pinout des ription:
8
5
4
2
7
6
3
1
1
12V DC output.
No urrent limitation. Both voltage and amperage depend on power supply
DC input.
2
Dis riminator output
Unfiltered audio limited to the NFM re eive mode.
0.78V p-pEMF 10kΩ (NFM deviation 3kHz, audio 1kHz)
3
External mute input.
Short this terminal to the ground to mute the re eiver’s audio output.
Remember that this fun tion does not prote t the high frequen y ir uitry
from strong nearby transmissions.
4,5
Control 1,2
When busy (squel h is open) the ontrol loses between 1 and 2 terminals.
Uses non-polar photo MOS relays. Up to 350mA on-resistan e 2Ω or less,
load voltage 40V)
6 GPS time pulse input
7
Low level audio output (2.5mV@
600Ω)
Not affe ted by hanges in AF GAIN.
8 Ground

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⑧
SP OUT Φ3.5mm monaural ja k (Up to 2W with 8Ω load)
To onne t to an external speaker.
⑨
LINE OUT
Φ3.5mm stereo ja k (600Ω -10dBm)
To onne t to an external re ording devi e, or an audio amplifier. Can be
swit hed to output a 12kHz wide analog I/Q signal.
In dual-band re eption, the main frequen y is audible at the right side and the
sub-frequen y at the left side.
⑩
GPS
(not
ompatible
with the
GP5001 GPS
antenna unit)
For future
appli ations.
Only populated when optional IQ5001 board is fitted.
Mini-DIN-8 so ket pinout des ription:
8
5
4
2
7
6
3
1
1 GPS TXD
2 GPS 1Hz Pulse
3 12V
4 GND
5 GPS RXD
6 RTS
7 CTS
8 NC
⑪
I/Q OUT Only populated when optional IQ5001 board is fitted.
USB type B so ket whi h outputs digital I/Q data (bandwidth 0.9MHz) for PC.
⑫
AUX D-SUB 9 male so ket for re eiver serial ontrol or to onne t the optional
Ethernet Controller unit.
⑬
USB so ket USB Type B so ket for re eiver ontrol by PC.

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3. PREPARING F R PC C NTR L
 The supplied AR2300 CONTROLSOFT software features omplete re eiver ontrol, audio re ording/playba k
and memory bank management for the AR2300 re eiver.
3.1 PC requirements
Minimum PC system:
 Supported OS: Windows 7/8.1/10
 2GHz Dual Core CPU
 2 GHz RAM
 1024 x 768 resolution monitor
 One available USB 2.0 port
 CD-ROM drive for software installation
3.2 Connecting the receiver to the PC
Conne t the supplied USB able as follows:
Re eiver’s USB so ket (labelled with USB logo) on the ba k of the re eiver, to PC.
 Some type of USB 3 ports an be in ompatible due to the parti ular hipset they use. If that o urs, use a USB
2.0 port instead.
3.3 Installing the driver
Providing that your PC is onne ted to the Internet, you do not need to manually install the supplied USB driver.
(All following instru tions and s reenshots are based on the Windows 10 operating system)
1. Make sure the USB able is onne ted.
2. To he k the driver status, open WINDOWS DEVICE MANAGER
(press simultaneously the Windows key and the X key, then
sele t “Devi e Manager”)
3. Windows will first dete t the USB onne tion as pi tured:

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4. After Windows has automati ally downloaded and installed the
driver, Devi e Manager will list it as pi tured:
The auto-assigned COM number depends on your
PC onfiguration.

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4. C NTR L S FTWARE PERATI N
4.1 Connecting power
Conne t the supplied AC power adapter. If using another power supply, make sure it provides DC10.7V〜16V
with at least 2 A of power.
4.2 Power on
Push the power swit h on the re eiver’s front panel. The LED will turn orange/yellow, indi ating the stand-by
mode.
4.3 Starting the control software
 Copy the folder “AR2300 CONTROL SOFT” from inside the CD to any folder on your PC. The software does
not need to be installed; it an be run as is.
 Double li k “AR2300ControlSoft.exe” to start the software.
 When you start the software for the first time, Windows might ask you to whi h COM PORT the re eiver
is onne ted. Providing the orre t number is entered, it will be saved in the registry, therefore you
should not need to enter it again. Nevertheless, after onne ting the re eiver to a different USB port on
your PC, the COM port number might hange.
 When you start the software for the first time, a message
might ask you to reate a “.ar ” memory database file.
Don’t worry, you will be able to do it later in hapter 4.4.3,
so the software doesn’t ask for it again, every time you
start it. For now, just li k K.
Default software layout

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4.4 Software windows description
Any or all of the following windows an be displayed.
Main Control
Spe trum display / Menu bar / database
Ctrl1 S-Meter
Ctrl2 Mode et .
Ctrl3 AF, RF, SQL ontrol
Ctrl4 FFT ontrol
Ctrl5 Option settings
Ctrl6 Frequen y panel
In the menu bar, go to WINDOW to sele t your hoi e of windows to display.
Layout with all windows displayed:
HINT! Whereas all individual windows an be pla ed anywhere on the s reen, to automati ally pla e windows as
on the above pi ture, in the menu bar go to WINDOW > GATHER WINDOW.
①
②
③
④
⑤
➅
➅➅
➅
MAIN C NTR L
SPECTRUM DISPLAY
DATABASE
MENU BAR

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4.4.1 MAIN CONTROL WINDOW DESCRIPTION
FREQUENCY
(Min.: 0000.040000 MHz, max.: 3150.000000 MHz)
Change the receive frequency y either:
-Hovering with the mouse over each digit and scrolling the
mouse wheel up or down.
-Entering the frequency via the PC key oard + ENTER key
for MHz.
-Entering the frequency via the PC key oard + K key for
kHz.
-Using the left and right arrow key of the PC key oard.
To set an OFFSET frequency, enter it via the PC key oard
and validate with the SPACE BAR.
MAIN DIAL / OFFSET DIAL
Tune the frequency up or down y hovering the mouse
over either sym ol and scrolling the mouse wheel up or
down.
Frequency step will e as set in the STEP menu.
The OFFSET sym ol only appears if the offset function is
active.
MODE
Left-click to manually select one of the 24 availa le modes.
Selecting AUTO is also possi le.
Auto does also automatically select the IF BAND and STEP
values.
IF BAND
Left-click to manually select one of the 10 availa le IF filter
andwidths.
STEP
Manually change the frequency step y hovering the mouse
over each digit and increasing or decreasing the value with
the mouse scroll wheel.
Min: 000.010k
Max:999.990k
AF
Adjust the volume from 000 to 255 y:
-Hovering your mouse over the 3 digits and scrolling the
mouse wheel up or down.
-Left-click on the 3 digits to adjust the AF slider and set the
audio channel alance when in OFFSET or DUAL BAND
mode.
SQL
Adjust the squelch level from 000 to 255 y:
-Hovering your mouse over the 3 digits and scrolling the
mouse wheel up or down.
-Use the key oard up and down arrows.
RF Amp / Att
Left-click to select either:
-RF Amp: ON or OFF
-Att: 0, -10, or -20dB
-AUTO

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4.4.2 SPECTRUM DISPLAY DESCRIPTION
4.4.3 MENU BAR DESCRIPTION
SPECTRUM DISPLAY
Spectrum displayed in real time. Receive frequency is
the center frequency.
Left (single) click on spectrum: Receiver is tuned to the
clicked frequency.
Right click on spectrum: OFFSET frequency is set and
marked y a vertical lue line.
Mouse wheel: Each scroll step increases or decreases
the frequency y a value 1/10 of the spectrum width.
For ex.: Spectrum andwidth = 800kHz =>each wheel
step = 80kHz
Click the icon to switch to waterfall display.
A waterfall display is the variation of signal strength in
conjunction with the time elapsed. The color will vary
depending on the signal amplitude.
New/Open/Save/Save As concerns “.arc” extension files which
represent a PC ased data ase ackup of memory channels, anks,
search/scan, antenna settings, recordings, scheduling and logs.
These “.arc” files are saved in the same folder than the software
executa le.
Select Dev ce: Allows to manually select a receiver to connect to, if
more than one receiver is connected to your PC.
SD Card: Manually record and play ack audio files, from the SD
card inserted into the receiver.
Export / Import Log(csv): Export and import PC ased log files of
all scan and search hits, including time stamp, signal level, mode,
RF amp and ATT settings, and hit counts.
Export / Import Database(csv): Export and import a PC ased
data ase with info limited to frequency, mode and text.
Export / Import Memory(csv): Export and import PC ased
memory content (frequency, ank, channel, mode, tone, ATT, ANT,
priority, select, REC, memo, pass, voice SQL)
Send Memory After Ex t: Uploads the currently active (PC ased)
MEMORY content to the receiver, then closes the software.
Send Backup F le After Ex t: Uploads a selecta le (PC ased)
ackup text file to the receiver, then closes the software. This
ackup text file is sent y the receiver every time the software is
started and saved inside the software folder.
Send Clone F le on SD After Ex t: Uploads a complete receiver
clone file, from the SD card inside the receiver, to the receiver. (To
create clone files, go to MENU BAR > SETTING > OPTION)

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4.4.3 MENU BAR DESCRIPTION ( ontinued)
Here you can select whether or not to display the tool ar
and status ar
, depending
on the availa le
desktop
space.
Power the receiver ON or OFF.
Power off does actually put the receiver in stand y mode,
as to e completely off, the receiver’s front panel switch
has to e used.
Ctrl 1 to Ctrl 6: Select here which of the
windows you would like to display for
convenient receiver operation.
FFT (default) displays the frequency and
signal spectrum.
A waterfall display is the variation of signal
strength in conjunction with the time
elapsed. The color will vary depending on
the signal amplitude.
Whereas all individual windows can e
placed anywhere on the screen, to
automatically place windows on a default
layout, select Gather W ndow.
Default W ndow S ze: (No function)

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4.4.3 MENU BAR DESCRIPTION ( ontinued)
Area: Select the and plan region (USA, Japan or Europe).
In t al ze Rece ver: This will revert all settings to factory default and erase
ALL memory data. It is advised to do a ackup to SD efore using this
function.
Sleep T mer: Check the RUN ox to activate, and set the num er of
minutes efore the receiver goes to sleep.
Pr or ty Operat on: The priority feature permits checking for activity on
one of the 2000 memory channels, while the AR2300 continues scanning,
searching or monitoring. The receiver is momentarily tuned to the priority
channel frequency to listen for any signal. If activity is found, the receiver
will remain on the active frequency until the signal disappears.
Squelch Hysteres s: Sets the squelch hysteresis depth. For ex.: When
squelch is -100dB and hysteresis is 6dB, the squelch opens when the
reception level exceeds -100dB. The squelch does not close until the
reception level is -106dB or less.
Create Clone F le to SD Card: Saves all receiver settings and memory
data to the SD card which is inside the receiver.
To restore such a ackup to a receiver, from the MENU BAR go to FILE >
SEND CLONE FILE ON SD CARD AFTER EXIT.
About ctrlsoft: Displays the software version.
(Version 1.0.4.7 is final)
Help: Accesses the inline help file for this software.
The content is outdated and supplied for reference
only. The printed or pdf manual you are reading
now is up to date.

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4.4.4 DATABASE WINDOW DESCRIPTION
LOG TAB
Log file of all scan and search hits, including time
stamp, signal level, mode, RF amp and ATT
settings, and hit counts.
Each hit can e copied to a ank / channel .
DATABASE tab
List-up of the data ase which can e imported as a
".csv" file. Information is limited to frequency,
receive mode and text. The descriptive text
appears on the "main control" panel whenever a
signal is received on a frequency stored in the
data ase.
SCHEDULE tab
Schedule multiple events such as scan, search,
VFO reception and audio recordings.
RECORDING tab
List-up of all audio recordings in "wav" format.
(AR2300 line-out needs to e connected to line-in
of PC audio card)
ANT. SETTING tab
For frequencies over 25 MHz you can program an
automatic selection etween 2 antennas. Multiple
and selections are possi le.
MEMORY tab
List-up of all stored memory channels. Can e edited, increased
and erased. Max. 2000 channels
MEMORY GROUP tab
Settings for each memory ank:
-Scan delay time (after signal is gone)
-Free time (ar itrary time for each signal)
-Bank ena le / disa le
-Bank linking
MEM BANK TITLE tab
Assign or edit a title for each of the 40 memory anks.
SEARCH BANK tab
Create, edit, erase search anks (max.40). Individually set the
frequency, mode, step, RF amp and ATT values.
SEARCH PASS tab
Lists all pass frequencies created during a ank search. Each
entry can e ena led, disa led or erased. Max. 30 pass
frequencies per ank.
SEARCH GROUP tab
Settings for each search ank:
-Scan delay time (after signal is gone)
-Free time (ar itrary time for each signal)
-Bank ena le / disa le & linking
SEARCH BOX
Allows incremental and case sensitive word search,
narrows down to the column selected on the left
side of t
he ox.
MAIN MEMORY LIST
Single left click: Highlights the line
Left dou le click: Activates the related function
Slow left dou le click: Edits the content of this cell
Right click: Opens a su -menu related to this line
PC key oard P key: Tunes to the frequency of the upper line
PC key oard N key: Tunes to the frequency of the lower line
PC key oard + key: Sets the upper line as a su - and frequency
PC key oard - key: Sets the lower line as a su - and frequency

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4.4.5
DESCRIPTION
OF
C
ONTROL
WIND
OWS 1
AND 2
The S
-
meter indicator shows the relative strength for the received signal in dB.
VFO
Stored tuna le data that contains frequency, step, attenuator, etc. Each click on this icon
toggles etween the 4 availa le VFOs (A~D).
SEARCH
The receiver sweeps etween previously set start and end frequencies, in search of active
frequencies. Each click toggles to the next previously set search ank.
SCAN
The receivers checks a list ( ank) of frequencies, in search of active frequencies. Each
click toggles to the next previously set scan ank.
S.SCAN
The receiver checks a list of memory channels tagged as "select", in search of active
frequencies. Maximum of 100 select scan channels throughout all 40 memory anks.
L.SCAN
The receiver checks ALL memory channels listed in the MEMORY ta , in search of active
frequencies.
MONI
Click to temporarily set the squelch threshold level to 0 (open). Any signal level will e
audi le as a result. Click again to return to the previous squelch value.
+MEM
Click to add the currently received frequency to the main memory list ta . You will e a le
to specify the ank, channel, mode, antenna, RF Amp and ATT settings.
+PASS
While scanning or searching, the frequency received at the time you click this utton will e
excluded from your next scan / search.
OFFSET
To set an offset frequency, enter it via the PC key oard and validate with the SPACE BAR.
Click this utton to tune the receiver to the offset frequency. Click again to return to the
main frequency. Limitations: Only works for frequencies over 25MHz and IF filter max.
100kHz. Offset frequency must e withing +/-5MHz from the main frequency.
DUAL
To enter dual and reception mode. One and must e elow, the other over 25MHz. To
set the audio channel alance, left click on the 3 digits of the AF indicator in the MAIN
CONTROL panel.
ANTENNA
"PRG" automatically switches to antenna 1 or 2 according to the programma le settings in
the "Antenna Setting" ta .
You can also manually select the antenna y clicking "1" or "2".
MODE (AUTO IF BAND) / MODE
By clicking AUTO, the receive mode and IF filter andwidth are chosen automatically y the
receiver depending on the frequency. The "Auto IF Band" uttons allow you to manually
select a mode, ut the receiver sets the IF filter andwidth automatically depending on the
frequency. With the simple "Mode" uttons you can manually select the mode. IF filter
andwidth has to e selected manually.

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4.4.6
DESCRIPTION
OF CONTROL WINDOWS 3
AND 4
STEP
This is the frequency increment used when selecting a frequency using the lue tuning
dial, or the PC key oard's left and right arrows.
0.001kHz to 999.999kHz in 0.001kHz increments.
AF GAIN
Speaker and headphone volume slider.
ATTENUATOR and RF AMP
With the slider select either RF Amp: ON or OFF, Att:0, -10, -20dB, or AUTO. Refer to the
Main Control window for selection indication.
AGC
The AGC function controls receiver gain to produce a constant audio output level even
when the received signal strength is varied y fading, etc. Select either FAST, MID, SLOW
or MANUAL (adjust the AGC level with the slider).
SQL (no se squelch)
Use the slide to adjust the squelch threshold level. The squelch removes noise output from
the speaker (closed condition) when no signal is received.
VOICE SQL
This function opens the squelch only when receiving a modulated voice signal. Adjust
aggressiveness and delay (time until squelch opens) with the slide ars.
IF BAND
Use the slide ar to select one of the 10 availa le IF andwidth filters. Refer to the Main
Control window for exact values.
IF SHIFT
The IF shift function changes the center of the IF (intermediate frequency) pass and
frequency to reject interference.
+/-1200Hz
Refer to the main control window for exact values.
Not active in FM modes.
SPAN
Control the displayed spectrum andwidth from 0.8MHz to 10MHz. The top left corner of
the spectrum indicates the exact span value.
CALC
The calculation function offers 2 alternative spectrum modes:
MAXIMUM: Each sweep is retained as data and uilt-up on screen.
AVERAGE: Signal averaging over the sampling cycle. A sta le pattern is produced even if
the signal is fluctuating.
PEAKS
This function searches for the strongest signals in real time, in the displayed spectrum,
a ove a threshold level you can set with the slide ar.
10 peaks maximum. Select 0 to erase all peaks.
You can tune to the strongest signal in the spectrum with MAX, or only in one half of the
spectrum with LEFT or RIGHT.
WATER FALL SPEED
Control the waterfall speed y moving the slider.
WATER FALL COLOR
Control the waterfall color codes depending on the signal strength etween -30 and -
110dB.