Avalon RF DX602-C1 User manual

Avalon RF, Inc. • 344 Coogan Way • El Cajon, CA 92020
Phone: [phone] • Fax: [phone] • Email: [e-mail]
DX602-C1
Two Antenna Diversity
Receiver for UAV
User's Guide & Operating Manual
AV010220/1-000
REV. X0 – 14 Oct 2005
Edited by Guru Mujumdar
http://www.avalonrf.com/

AVALON RF, INC. Page ii
DX602-C1 User’s Guide & Operating Manual
Table of Contents
1. General .................................................................................................1
Figure A – Front Panel..........................................................................2
Figure B – Rear Panel – Broadcasting..................................................3
Figure C – Rear Panel – Security .........................................................3
2. Specifications........................................................................................4
Interface................................................................................................4
Figure D – Interface - Security Version.................................................4
Power Input...........................................................................................5
Video Output.........................................................................................5
Data Output...........................................................................................5
Antenna Inputs......................................................................................5
RSSI Output..........................................................................................5
Remote Programming Connections......................................................5
Size.......................................................................................................6
Weight...................................................................................................6
Figure E – DX602 Mechanical Specifications - Inches [mm].................7
Environmental Conditions.....................................................................8
3. Operating Instructions...........................................................................9
Human Interface ...................................................................................9
Front Panel Frequency Select Switches ...........................................9
Front Panel Indicators.......................................................................9
Operating the DX602............................................................................9
Tuning ...............................................................................................9
4. Ordering Information ...........................................................................10
Optional features.............................................................................10
Optional accessories.......................................................................11
Figure F – Block Diagram – Basic System w/ Single Receiver.......13
Figure G – Block Diagram – Basic System with Four Receivers.....14
Appendix A – Remote Programming ..................................................15

AVALON RF, INC. Page 1 of 14
DX602-C1 User’s Guide & Operating Manual
1. General
The DX602-C1 is a rugged 2-antenna ‘true’ diversity video receiver
intended for demanding high end video applications. The unit has
special features added for the UAV applications.
It is a analog FM receiver with our intelligent electronics that selects
the best ‘video’ signal to be sent to the output.
The standard audio channel is modified to receive data at 4800 Baud.
The DX602 tuning range is from 2400 MHz to 2500 MHz. (**)
The DX602 receiver has the following standard channels:
A video channel.
A data channel.
(**) Optional - Extended Range from 2150 to 2500 MHz.

AVALON RF, INC. Page 2 of 14
DX602-C1 User’s Guide & Operating Manual
Figure A – Front Panel
DX602-C1 Controls, Indicators and Connectors
1 - Antenna 1 Input
2 - Antenna 1 Select LED
3 - Frequency Selector Switch/EIN 1
4 - Frequency Selector Switch/EIN 2
5 - Frequency Selector Switch/EIN 3
6 - BTx (Back Channel Transmitter) Antenna (NOT APPLICABLE)
7 - Antenna 2 Select LED
8 - Antenna 2 Input

AVALON RF, INC. Page 3 of 14
DX602-C1 User’s Guide & Operating Manual
Figure B – Rear Panel – Broadcasting
DX402/DX502/DX602 Controls and Connectors
NOT APPLICABLE
1 - Data Output (section 2.4) 4 - Video Output (section 2.6)
2 - Audio Output (section 2.5) 5 - On/Off Switch
3 - Power In (section 2.1)
Figure C – Rear Panel – Security
DX602-C1 Controls and Connectors
1 - On/Off Switch 6 - Interface (section 2.7)

AVALON RF, INC. Page 4 of 14
DX602-C1 User’s Guide & Operating Manual
2. Specifications
2.1 Interface - (Figure C, circle 6).
The interface is through a High Density DB15 connector (Figure D)
on the rear panel of the DX602.
Figure D – Interface - Security Version
Pin #
Function Pin # Function
1 Power Input 9 Signal Ground
2 Video Output 10 Tuner1 RSSI Output
3 Video Return Ground 11 Alarm Output-N/A
4 Data Output (Downlink) 12 RS-485 I/O ‘A’- N/A
5 Microphone Input- N/A 13 RS-485 I/O ‘B’- N/A
6 DX602-C1 Programming
RS232 Tx 14 Tuner 2 RSSI Output
7 DX602-C1 Programming
RS232 Rx 15 Telemetry 3 Output- N/A
8 Power Return Ground
NOTE: Do Not connect to the pins marked N/A (Not Applicable).
These pins have internal connections/ voltages and could damage
internal circuitry.

AVALON RF, INC. Page 5 of 14
DX602-C1 User’s Guide & Operating Manual
2.2.1 Power Input (pins 1 and 8).
a) The DX602 operates off a 9Vdc to 16Vdc unregulated voltage
source with a ripple of less than 0.5Vp.p.
b) Input current at an input voltage of 12Vdc is under 0.6 Amps.
c) Power is switched via an ON/OFF mechanical switch.
d) The DX602 power input is protected against over voltage and
reverse polarity.
2.2.2 Video Output (pins 2 and 3).
a) The DX602 video output is NTSC/PAL/RS170A/CCIR
base-band, 75 Ohm.
b) Output amplitude is 1 V(p.p.) with negative sync tips of 0.3
V(p.p.)
2.2.3 Data Output (Downlink) (pins 4 and 9).
The DX602 data output is at RS232 compatible levels at 4800 Baud.
2.3 Antenna Inputs, total of 2 (Circles 1 & 8 on front panel).
DX602: The tuning frequency range is 2400-2500 MHz, FM
modulated. The antenna connectors are SMA type with a 50 Ω(ohm)
impedance. An option extends the range from 2150 to 2500 MHz.
2.4 RSSI Outputs (pins 10, 14 and pin 8)
The RSSI outputs from both the tuners are brought out for monitoring/
tracking purposes. These are buffered outputs and have a range of
0-4V.
2.5 Remote Programming Connections (pin 6, 7 and pin 9).
The DX602 can be remotely programmed via a RS232C interface.
Data rate is 9600 baud, 8 bits, no parity, ASCII encoded per protocol
described in Appendix A.

AVALON RF, INC. Page 6 of 14
DX602-C1 User’s Guide & Operating Manual
2.6 Size
Configuration Dimensions
5.09” W x 1.42” H x 5.75” DDX602-C1
(See Figure H) 129mm x 36mm x 146mm
NOTES
The DX602 is intended for mounting in the following configurations:
a) In a CD ROM bay in a DVR
b) Three DX602s on a 19” Retma rack drawer, 1U high.
c) Ten DX602s on a 19” Retma rack drawer, 3U high.
d) Inside other OEM equipment, with or without covers.
2.7 Weight
Net Weight 1 lb. (0.46Kg)
Shipping weight 2 lbs. (0.92Kg)

AVALON RF, INC. Page 7 of 14
DX602-C1 User’s Guide & Operating Manual
Figure E – DX602 Mechanical Specifications - Inches [mm]

AVALON RF, INC. Page 8 of 14
DX602-C1 User’s Guide & Operating Manual
2.8 Environmental Conditions.
The DX602 is designed to meet the following environmental
conditions:
a) Operating temperature
-4°to 122°F
(-20°to 50°C)
b) Storage temperature -13°to 150°F
(-25°to 65°C)
c) Vibration 1.5G, from 10Hz to 2KHz, sine
wave, three axis
d) Shock 15G, 25msec, half sine wave,
three axis
e) Humidity 5 to 95%, non-condensing
f) Inclination Any
g) Altitude -1500 feet to 15,000 feet
(-450 meter to 4,500 meter)

AVALON RF, INC. Page 9 of 14
DX602-C1 User’s Guide & Operating Manual
3. Operating Instructions
3.1 Human Interface.
3.1.1 Front Panel Frequency Select Switches (Circles 3,4,5 on figure A)
The DX602 front panel switches have the following functions:
a) Frequency select (tuning) in a standard DX602.
b) Electronic Identification Number (EIN) in units with auto
synthesizing.
3.1.2 Front Panel Indicators (Circles 2,7 on figure A).
The DX602 front panel includes antenna select LEDs. One Green
LED for each antenna. The antenna LEDs indicate which of the
antennas has been selected for its best video.
3.2 Operating the DX602.
The DX602 has the following user accessible functions:
3.2.1 On/Off
3.2.2 Tuning can be accomplished in 2 ways-
a) via front panel rotary switches (Circles 3,4,5 on figure A).
2150MHz to 2500MHz 150-500 on switches
b) Remotely via the RS232 interface (Optional).
Refer Appendix A.

AVALON RF, INC. Page 10 of 14
DX602-C1 User’s Guide & Operating Manual
4. Ordering Information
DX602-C1 – Basic System
Every DX602 comes with the following standard features and
accessories.
4.1 One DX602 in a ZIPLOCK ESD bag.
The receiver has one video and one data channel.
4.2 One BX002U 12V low noise regulated AC adapter for 110Vac/60Hz.
4.3 A user manual (the one you’re reading).
4.4 One reusable carton with foam lining.
4.5 Optional features:
Option 00 European version.
Includes a 230VAC power adapter and calibration
for PAL.
Option 04 Extended tuning range
DX602 - 2.150GHz to 2.500GHz
Option R3 Rack mount kit to mount 3 DX602 in a rack.

AVALON RF, INC. Page 11 of 14
DX602-C1 User’s Guide & Operating Manual
4.6 Optional accessories
4.6.1 Antennas.
Each receiver requires two (2) antennas. Higher antenna gain yields
longer range with limitations on reception “viewing angle”.
Ordering information:
Description DX602
2dbi Omnidirectional AX602
2dbi omni circular polarized AX602R
5dbi Omnidirectional AX605
8dbi panel antenna AX608
10dbi circular polarized(RH) patch AX610R
10dbi circular polarized(LH) patch AX610L
11dbi log periodic antenna
13dbi panel antenna AX613
15dbi panel antenna AX615
18dbi panel antenna AX618
20dbi panel antenna AX620
24dbi parabolic dish antenna AX624
4.6.2 Antenna cables.
These cables connect the receiver to its antennas. If a system
requires splitters, these cables connect the antennas to the splitters.
DX602: Times Microwave LMR-240 50 Ω(ohm) or equivalent are
recommended for runs up to 30ft and LMR-400 50 Ω(ohm) for runs
from 30ft to 50ft.
Ordering Information:
Length DX602
N-SMA/50Ω(ohm)
5’ CBLNS-5
15’ CBLNS-15
30’ CBLNS-30
50’ CBLNS-50

AVALON RF, INC. Page 12 of 14
DX602-C1 User’s Guide & Operating Manual
4.6.3 Splitters
When a pair of antennas feeds more than one receiver, it is
convenient to split the signal from each antenna to all receivers at the
same location. Please remember that splitting will in turn reduce the
operating range and therefore not recommended unless a link budget
has the loss accounted for.
Ordering information:
Splitter type DX602
(SMA-SMA)
1 to 2 (two DX..2) SP2S
1 to 3 (three DX..2) SP3S
1 to 4 (four DX..2) SP3S
1 to 8 (eight DX..2) SP8S
4.6.4 Splitter to receiver cables.
The use of splitters requires jumper cables from every splitter output
to every receiver antenna input. Ordering information for a DX602
receiver system:
Number of
DX602
Receivers
Number
of cables
DX602
2 4 CBLSS-2
3 6 CBLSS-2
4 8 CBLSS-2

AVALON RF, INC. Page 13 of 14
DX602-C1 User’s Guide & Operating Manual
Figure F – Block Diagram of Basic System with a Single
DX602 Receiver
ANTENNA 1 ANTENNA 2
ANTENNA
CABLES (2)
DX602 POWER SUPPLY
VIDEO OUT
(BNC) DATA OUT (DB-9)
RSSI Outputs
LOW FREQUENCY
CABLES
RS232
PROGRAMMING

AVALON RF, INC. Page 14 of 14
DX602-C1 User’s Guide & Operating Manual
Figure G – Block Diagram of System with
Four DX602 Receivers
ANTENNA 1 ANTENNA 2
BACK CHANNEL
ANTENNA
SPLITTER
1:4 SPLITTER 1:4 COMBINER 4:1
DX502/DX602
ANTENNA
CABLES
DX502/DX602
DX502/DX602 DX502/DX602
SPLITTER TO RECEIVER JUMPER CABLES
2or 3(*) cables per receiver
2 or 3(*)
CABLES
A D P V
110VAC
TO 12VDC
LINE
12VDC POWER
DISTRIBUTION
2/3(*) CABLES per receiver
(*) With BACK CHANNEL

AVALON RF, INC. Page 15 of 14
DX602-C1 User’s Guide & Operating Manual
Appendix A – Remote Programming
1. Interface.
The DX602-C1 can be remotely programmed via an RS232C
interface. The data rate is set to 9600 Baud, 8 bits, no parity, 1 stop
bit and no handshaking signals. Data is ASCII encoded.
All commands must be terminated by a CR, LF or CR+LF.
2. Protocol.
a) Type “[enter]” to see the current frequency setting. The DX602-C1
reports “2296.0W 650W A”. The 2296.0 is the set frequency, the W
next to it indicates ‘wide bandwidth’. The 650 indicates the 6.50MHz
subcarrier that carries the data. The W following it indicates the
receiver is set for a ‘wide’ demodulator bandwidth of 250KHz. The “A”
in the end indicates ‘Automatic’ operation – i.e the DX602 will chose
the best antenna for video reception.
b) Type “T” to check tuner lock. The DX602-C1 reports
“ T1=L T2=L” implying both tuners T1 and T2 are locked.
c) Type “2379.0” to send a command to the DX602-C1 to change the
received frequency to 2379.0MHz.
d) Type “*1#2” to force the DX602-C1 to receive only Antenna 2.
The DX602-C1 will only receive video on Ant 2 input, and both
LEDs will be off. The DX602-C1 will report-
“ 2379.0W 650W M “. The M indicates ‘Manual’ mode of
operation.
e) Type “*1#” to return the DX602-C1 to automatic mode.