AOR SR2000A User manual
®
SR2000A
FREQUENCY MONITOR
INSTRUCTION MANUAL
AOR, LTD.
TABLE OF CONTENTS
Table of contents ------------------------------------------------------------------------------------------- 1
1 Index ------------------------------------------------------------------------------------------------ 3
1-1 Introduction -------------------------------------------------------------------------------------- 3
1-2 Maintaining the unit ---------------------------------------------------------------------------- 3
1-3 Power requirements --------------------------------------------------------------------------- 4
1-4 Supplied accessories ------------------------------------------------------------------------- 4
1-5 Features ------------------------------------------------------------------------------------------ 4
2 Control and functions ------------------------------------------------------------------------------ 5
2-1 Front panel controls ---------------------------------------------------------------------------- 5
2-2 Rear Panel --------------------------------------------------------------------------------------- 7
3 Connections -------------------------------------------------------------------------------------------- 9
4 Power Switch ------------------------------------------------------------------------------------------- 9
4-1 Start up ------------------------------------------------------------------------------------------- 9
4-2 Powering down --------------------------------------------------------------------------------- 9
5 Operations of the SR2000A ---------------------------------------------------------------------- 9
5-1 Display ---------------------------------------------------------------------------------------------- 9
5-2 Key commands ---------------------------------------------------------------------------------- 12
6 Monitoring Modes --------------------------------------------------------------------------------------- 13
6-1 Basic operations – VFO mode (manual mode) ------------------------------------------- 13
6-1-1 Setting up the monitoring frequency --------------------------------------------------- 13
6-1-2 Setting up the receive mode ------------------------------------------------------------- 16
6-1-3 Audio Gain Control ------------------------------------------------------------------------- 16
6-1-4 Squelch control ------------------------------------------------------------------------------ 17
6-1-5 RF attenuator and preamplifier settings ----------------------------------------------- 18
6-1-6 Mute volume and squelch ----------------------------------------------------------------- 18
6-1-7 Input sensitivity (amplitude) -------------------------------------------------------------- 19
6-1-8 Resolution bandwidth (RBW) ------------------------------------------------------------ 19
6-1-9 Waterfall display function ------------------------------------------------------------------ 20
6-1-10 Selecting the operation modes --------------------------------------------------------- 21
6-2 Operation Modes ----------------------------------------------------------------------------------22
6-2-1 Spectrum analyzer mode ------------------------------------------------------------------- 22
6-2-2 Step resolution mode ------------------------------------------------------------------------ 23
6-2-3 Channel scope mode ------------------------------------------------------------------------ 24
6-3 Marker functions --------------------------------------------------------------------------------- 25
6-4 Calculation function ------------------------------------------------------------------------------ 27
6-5 Video monitor function -------------------------------------------------------------------------- 28
7 Configuration -------------------------------------------------------------------------------------------- 29
7-1 Resetting the SR2000A ------------------------------------------------------------------------ 31
8 Memory channels ------------------------------------------------------------------------------------- 32
8-1 Memory read mode ------------------------------------------------------------------------------32
8-2 Memory scan -------------------------------------------------------------------------------------- 33
8-3 Programming the memory ----------------------------------------------------------------------34
8-4 Memory text input -------------------------------------------------------------------------------- 35
8-5 Selected memory scanning ------------------------------------------------------------------- 36
8-6 Priority monitor ----------------------------------------------------------------------------------- 38
9 Frequency Offset -----------------------------------------------------------------------------------------39
10 Normal Search and FFT Search ------------------------------------------------------------------- 40
10-1 Programming Search banks -------------------------------------------------------------------- 40
10-2 Normal Search ------------------------------------------------------------------------------------ 42
10-3 Frequency Pass setup --------------------------------------------------------------------------- 42
10-4 FFT Search ---------------------------------------------------------------------------------------- 43
10-4-1 Search banks and FFT search ----------------------------------------------------------- 43
10-4-2 FFT search setup ---------------------------------------------------------------------------- 44
1
10-4-3 FFT search results --------------------------------------------------------------------------- 44
11 Delete menu ---------------------------------------------------------------------------------------------- 46
12 Computer control information ---------------------------------------------------------------------- 47
12-1 Command list ------------------------------------------------------------------------------------ 49
12-2 Command details ------------------------------------------------------------------------------- 50
13 Specifications -------------------------------------------------------------------------------------------- 60
14 Limited warranty ----------------------------------------------------------------------------------------- 61
2
1 Introduction
1-1Introduction
Thank you for purchasing the SR2000A Frequency Monitor. The SR2000A is a worthy successor
to the SR2000 and is the “next generation” in frequency monitor. Using a five-inch TFT color
display, DSP (Digital Signal Processing) and FFT (Fast Fourier Transform), faster sampling rates
and color imaging, video display function, optional APCO25 (P25) decoder, the SR2000A opens
the door to new possibilities and applications. We put the power of FFT algorithms to work in
tandem with a powerful receiver covering 25 MHz ~ 3 GHz continuous (Cellular blocked for US
consumer version). The result is a compact color spectrum display monitor that’s ultra-sensitive,
incredibly fast, yet easy to use.
The SR2000A is perfect for base, mobile or field use and can also be used in combination with a
personal computer.
Every effort has been made to make this manual correct and up to date. Due to continuous
development of the product and by error or omission, anomalies may be found and this is
acknowledged.
© This manual is protected by copyright AOR, LTD. 2007. No information contained in this
manual may be copied or transferred by any means without the prior written consent of AOR,
LTD. AOR and the AOR logo are trademarks of AOR, LTD. All other trademarks and names are
acknowledged.
1-2Maintaining the unit
There are no internal operator adjustments. In the unlikely event of service being required,
please contact your dealer for technical assistance.
Level of risk
As the SR2000A is powered from 12V DC, there is little chance of serious injury as long as
common sense is applied.
Observe the polarity of connections if supplied AC power units is not being used. DC input is a
nominal 12V DC, with the connector wired center conductor positive. Reverse polarity connection
will damage the SR2000A and could lead to the risk of fire or explosion under severe
circumstances.
Carefully handle the AC plug of the supplied AC power unit to prevent touching the terminals
when inserting or removing from the AC plug. NEVER connect the SR2000A directly to the AC
outlet.
Handling the SR2000A
Use a soft, dry cloth to gently wipe the SR2000A clean. Never use abrasive cleaners or organic
solvents which may damage certain parts. Treat the unit with care, avoid spillage or leakage of
liquids into the cabinet and power supply. Special care should be taken to avoid liquid entering
around the keys, main dial or via the connectors.
[Note: Never push or knock the LCD screen – it is very fragile and sensitive to shock.]
Special remarks
Do not use or leave the SR2000A in direct sunlight (especially the TFT display). It is best to avoid
locations where excessive heat, humidity, dust and vibration are expected. Always keep the
SR2000A free from dust and moisture.
3
1-3Power requirements
The SR2000A may be provided with a suitable AC/DC power unit. The SR2000A is designed for
operation from a nominal 12 V DC regulated power supply (12 to 14 V is acceptable), which
should be capable of supplying a minimum of 1.5 amp continuous, ideally a 2 amp power supply
unit should be used.
[Note: Never connect the SR2000A directly to an AC outlet.]
[Safety Notice: Always disconnect the power supply from the AC outlet when not in use.]
Should the SR2000A appear to behave strangely, normal operation may be resumed by resetting
the microprocessor. Please refer to section “6. Configuration” for further information.
1-4 Supplied accessories
The following accessories are provided in the shipping box.
1 Instruction manual (this booklet)
1 AC adapter
1-5 Features
zFFT (Fast Fourier Transform) high speed display
The FFT search function enables incredibly high speed signal monitoring, 10MHz search
in approximately 0.07 seconds!
zDisplays up to 40MHz of spectrum bandwidth
Up to 40 MHz of bandwidth can be displayed in real time through advanced Digital Signal
Processing. (No audio is available when the frequency span is set to 20MHz or 40 MHz)
z5 inch TFT color LCD display
5 inch TFT color display is easy to monitor the clear, crisp images of received signals.
zWaterfall (time) display function
Tracks signals over time and uses colors to define their strength.
zAverage or peak value readings
zFrequency coverage
25 MHz ~ 3 GHz (Cellular Blocked for US consumer version)
zUltra-stable, high sensitivity triple conversion receiver
zAM/NFM/WFM/SFM receive modes
zVideo display mode (NTSC, PAL, and SECAM format)
z1000 memory settings
100ch x 10 memory banks
zEasy menu-driven operation
zPC control through serial port or USB interface
zAPCO25 (P25) decoder (Optional decoder board required)
4
2 Controls and functions
2-1Front panel controls
The front panel of the SR2000A is dominated by the large color LCD. Controls are ‘grouped’ to
assist efficient operation; there are a total of 26 keys in addition to the power on/off switch and the
rotary dial encoder.
1 Power switch
Press once to latch the switch in, switching on the SR2000A.
To switch off the SR2000A, press the switch again, the switch releases outward.
5
1 LCD (Liquid Crystal Display)
The large high resolution (320 x 240 pixels) 5 inch color TFT display provides all
operational information and spectrum display.
2 Soft function keys
Each one of the three “soft keys” has multiple roles as indicated on the LCD screen
depending on the circumstances of the operation.
3 Dial knob
The rotary dial knob is a multi-function rotary control and is used to move the cursor, to
make a selection, to move the marker/center frequency and to tune to the desired
frequency.
4. Main keypad
There are 20 main keys including numeric keys. Some keys have secondary functions,
and the functions are printed above each respective key. To access the secondary
function, press the “FUNC” key located at the top right of the control keys, then press
respective key.
5. Special function keys
Three (3) special function keys are provided with the SR2000A. Those keys are to be
used for setting the center frequency, squelch level and volume control (audio output).
6
2-2Rear panel
ANT
This is the antenna input for the SR2000A. The connector is a BNC type. Use 50ohm
cable to connect your antenna.
DC 12V
The supplied power unit is terminated with a center positive (+) polarity connector.
PHONES
Headphone jack (3.5mm stereo type):
A pair of headphones or earphones may be connected.
When this headphone jack is used, the internal speaker will be automatically disabled.
EXT.SP
External speaker jack: This 3.5mm mono jack provides audio output to drive an external
speaker unit. This unit should have a nominal 8 ohm impedance and power handling of 2
watts or greater.
VIDEO OUT
This RCA connector provides the composite video output. An external video monitor may
be connected.
ACC
Accessory connector: Provides output for audio and the discriminator. See below.
7
REMOTE 1
USB interface connector. Use a USB-A to USB-B cable (not supplied) to connect your PC.
The USB driver can be downloaded from the following URL:
http://www.ftdichip.com/ftdrivers.htm
Click “VCP Drivers”, then select the device number “FT232B”.
REMOTE 2
RS-232C serial interface connector. Use a DB-9 serial cable to connector your PC.
(Caution: The REMOTE 1 and the REMOTE 2 cannot be used simultaneously.)
INTERNAL SPEAKER (TOP PANEL)
Internal speaker
ACC CONNECTOR PIN ASSIGNMENT
This connector provides output for audio and the discriminator, or for other applications
you might create. Refer to the pin assignment indicated in the chart below.
PIN NUMBER CONNECTION
1 5V DC @30mA max.
2 Discriminator output (500mV p-p)
3 10.7MHz IF output
4 NC
5 NC
6 AF out (H) 120mV @ 600 ohm
7 AF out (L) 60mV @ 600 ohm
8 Ground
Note: Values for pins 2, 6, 7 are for a FM 3KHz deviation at antenna input level.
RACK MOUNT
There are four (4) screw holes (unused), two (2) on each side on the cabinet. They are a
provision for rack mount application. Size of the screw is M4 x 8.
8
3 Connections
Connect your antenna to the connector labeled “ANT”, and an external speaker,
if required, to the connector labeled “EXT.SP”. The speaker should have a power handling
capability of 2 watts or greater.
Where possible, use the supplied AC/DC power unit. Connect the supplied power unit to the
wall outlet and its DC cable to the “DC 12V” connector on the rear panel.
4. Power switch
To switch on the SR2000A, press once to latch the switch in.
4-1 Start-up
After connecting the AC/DC power unit, switch on the power switch. The opening screen will
briefly display the AOR logo, model number, firmware version and make a short
“beep” sound. This start-up sequence is a factory default and cannot be altered.
4-2 Powering down
To switch off the SR2000A, press the power switch a second time, the switch releases and
the unit is powered down. Interfering with the regular powering down process might damage
the SR2000A.
5 Operations of the SR2000A
5-1 Display
This section explains what you can expect to see on the SR2000A monitor screen using the
VFO seek mode in the spectrum operation mode.
Once the SR2000A is properly connected, the display will appear on the screen.
9
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