Pacific Microwave Research, Inc. DT-200 Digital Microwave Video & Audio Transmitter USER’S MANUAL Pacific Microwave Research, Inc. 1485 Poinsettia Avenue, Suite 111 Vista, CA 92083 760.295.5416 www.pmicrowave.
IMPORTANT WARNING! THIS EQUIPMENT WILL POSE A RADIATION HAZARD IF IMPROPERLY HANDLED Pacific Microwave Research, Inc. (PMR), in compliance with RF exposures limits set forth in OET Bulletin 65, Fourth Edition, August, 1999.1 The following text is intended to notify the user of PMR’s transmitter equipment that a radiation hazard could exist if the DT-200S transmitter is improperly operated. The user should carefully read and understand this section before operating equipment.
The safe distance is based on the MPE exposure limits identified in Table 1. (FCC Limits for Maximum Permissible Exposure) of OST 65. The maximum power density allowed at 2400 MHz is 5 mW/cm2 for occupational/controlled exposure, and 1 mW/cm2 for general population/uncontrolled exposure. For fixed operations, based upon a maximum transmitter power output of 0.1W with an antenna gain of +2 dBi, the safe distance is greater than 4 cm from the antenna for both controlled and uncontrolled exposure.
Pacific Microwave Research, Inc. DT-200 User’s Manual ©2006 1.1 Introduction The DT-200 Digital COFDM Microwave Video and Audio Transmitter from Pacific Microwave Research is a compact transmitter designed for short-range transmission applications. Common uses include remote broadcasting (ENG, EFP), law enforcement surveillance and video collection. The DT-200 is a compact unit designed for portable and fixed applications and transmits remote video to a central receive location.
Pacific Microwave Research, Inc. DT-200 User’s Manual ©2006 2.1.1 DC Power Input The DT-200 is designed to operate from a nominal +12 Vdc power source; however, the transmitter will operate with DC input voltages from +10 - +36 Vdc. DC power is supplied through the front panel PT02E-8-4P (mate supplied) connector (J3) with +12 Vdc on Pin A and Ground on Pin C. This source should be fused at 2.0 A. Power consumption is nominally 0.8 A. The DT-200 transmitter is operating whenever power is applied.
Pacific Microwave Research, Inc. DT-200 User’s Manual ©2006 The diagram (Table 1.) below details the proper wiring for both balanced audio and unbalanced audio applications. - A1 A1 (-) Pin 3 + A1 (+) Pin 1 Gnd, P2 & 6 + A2 A2 (+) Pin 5 - A2 (-) Pin 7 Balanced Audio Input Wiring A1 (-) Pin 3 A1 A1 (+) Pin 1 Gnd, P2 & 6 A2 (+) Pin 5 A2 A2 (-) Pin 71 Unbalanced Audio Input Wiring Table 1. DT-200 Audio Wiring 2.1.
Pacific Microwave Research, Inc. DT-200 User’s Manual ©2006 3.0 Power Output The DT-200 is capable of operating at two power levels to fit a variety of operational scenarios. The nominal power output on high power is 100 mW. The nominal power output on low power is 10 mW. The power level selection is controlled via the RS-232 control protocol (Section 13.0). 4.0 Frequency Frequency selection of the DT-200 is accomplished by operation of the front panel rotary switch.
Pacific Microwave Research, Inc. DT-200 User’s Manual ©2006 Status Video Present No Video Status Low Voltage High Temp Normal Operation Color State Green Steady Green Flashing Fault Operation Color State Red Flashing Red Steady Priority 3 Priority 2 1 Table 2.
Pacific Microwave Research, Inc. DT-200 User’s Manual ©2006 8.0 Specifications Electrical: • Model Number - Frequency Range o DT-200P – 340 to 400 MHz o DT-200L – 1.7 to 1.9 GHz o DT-200S – 1.9 to 2.7 GHz o DT-200C1 – 3.1 to 3.5 GHz o DT-200C2 – 4.4 to 5.0 GHz • Modulation – COFDM 2K • Frequency Stability – +0.002% • Spurious/Harmonic Output – > -65 dBc • • • • • • • • Compression – MPEG-2 Video Input Format – NTSC or PAL Video Input Impedance – 75 Ω unbalanced Audio – o 200 Hz to 15 kHz +1.
Pacific Microwave Research, Inc. DT-200 User’s Manual ©2006 9.0 Connector Pin-out The following table applies to the MDM-15 (J2) located on the front panel of the DT-200 transmitter. The DT-200 is supplied with the mating connector.
Pacific Microwave Research, Inc. DT-200 User’s Manual ©2006 10.
Pacific Microwave Research, Inc. DT-200 User’s Manual ©2006 11.0 Mechanical 3.500 5.300 Clearance for #4-40 (4 plc. typ.) Mounting holes are 0.125 from each corner All Dimensions in Inches 1.
Pacific Microwave Research, Inc. DT-200 User’s Manual ©2006 12.0 Repair There are no user serviceable parts inside the DT-200. Damage to the QC seals on the transmitter voids the warranty. Should your unit require service, contact Pacific Microwave Research, Inc. at 760.295.5416 or www.pmicrowave.com to request an RMA number.
Pacific Microwave Research, Inc. DT-200 User’s Manual ©2006 13.0 RS-232 Control Protocol 1.0.0 General Characteristics 1. Processor type = PIC18F6620 2. Processor Osc. = 16.0 MHz 3. RS232 Communications, Baud Rate 9600, N, 8, 1 2.0.0 RS-232 Control Commands All commands are case sensitive. The response to any syntactically VALID command is “$V#”. The response to any syntactically INVALID command is ‘$I#’. The response to any syntactically VALID, but incorrect command is “$E#”.
Pacific Microwave Research, Inc. DT-200 User’s Manual ©2006 3. Change RF Frequency in MHz This command selects the RF operating frequency of the unit. The frequency is defined as any four digit number. Command Syntax: $Fnnnn# where: nnnn = RF frequency (MHz). Frequency must be within selected band and conform to licensed parameters. Example: Command Change RF to 2459 MHz $F2459# Change RF to invalid channel $FJUNK# 4.
Pacific Microwave Research, Inc. DT-200 User’s Manual ©2006 7. Change Input Video Standard This command selects the input video standard. The two available standards are PAL and NTSC. Command Syntax: $Va# where: a=P a=N Selects PAL video standard Selects NTSC video standard Example: Change video to PAL Change video to NTSC 8. Command $VP# $VN# Response $V# $V# Change Modulation Constellation This command selects the modulation constellation type.
Pacific Microwave Research, Inc. DT-200 User’s Manual ©2006 Example: Change FEC to ½ Change FEC to 2/3 Change FEC to ¾ Change FEC to 5/6 Change FEC to 7/8 11. Command $E0# $E1# $E2# $E3# $E4# Response $V# $V# $V# $V# $V# Change RF Power Output mode This command selects the transmitter RF power output mode. The attenuator will be set according to corresponding variable values.
Pacific Microwave Research, Inc. DT-200 User’s Manual ©2006 a=L a=S a=3 a=C Selects L Band (1200 MHz to 1900 MHz) Selects S Band (2000 MHz to 2700 MHz) Selects 3G Band (3000 MHz to 3900 MHz) Selects C Band (4000 MHz to 5000 MHz) Example: Command $QP# Change Band to P Band 3.0.0 Response $V# RS-232 Verification Commands (Must be in Remote Mode) 1. Read Local/Remote Mode condition This command returns the current communications mode.
Pacific Microwave Research, Inc. DT-200 User’s Manual ©2006 5. Read Audio 2 Level This command returns the current operational status of Audio 2 Input level. Command Syntax: $B?# where the response is: L Selects Line level M Selects Microphone level Example: Command $B?# Check Audio 2 level Response $?BL# (line) $?BM# (mic) $B?# 6. Read channel information This command returns the current number and frequency of operational RF channels programmed into the unit.
Pacific Microwave Research, Inc. DT-200 User’s Manual ©2006 9. Read Modulation constellation mode This command returns the current modulation constellation. Command Syntax: $L?# Valid responses would include: 0 = QPSK 1 = 16QAM Example: Command $L?# Read modulation mode $L?# 10. Response $?L0# (QPSK) $?L1# (16QAM) Read COFDM Guard Interval This command returns the current guard interval.
Pacific Microwave Research, Inc. DT-200 User’s Manual ©2006 Example: Command $D?# Check Modulation MODE 13. Response $?D1/2,1/16,QPSK# Read RF Output Power mode This command returns the current RF power output mode. Command Syntax: $P?# Valid responses include: 0 = Standby 1 = Low Power 2 = High Power Example: Command $P?# Check RF Output 14. Response $?P1# (low) Read Data Channel RS232 Baud Rate This command returns the current asynchronous data transmission rate of the data channel.
Pacific Microwave Research, Inc. DT-200 User’s Manual ©2006 16. Read Encryption Key Number This command returns the current operational encryption key number. Command Syntax: $K?# Valid responses are of the format: $?Knns# where: nn = Current encryption key s=D Default (hardcoded) Encryption key source s = none User (EEPROM) Encryption key source Example: Command $K?# Check Key Number 17.
Pacific Microwave Research, Inc. DT-200 User’s Manual ©2006 Examples: Program 1 channel Program 6 channels 2. Command Response $N01,4410# V $N06,4590,4870,4910,4950,5000,5000# V Write User Encryption Key This command defines the user portion (suffix) of the encryption key. There are a maximum of 16 user keys (nn), numbered 00 through 15. Changes can be made to only one user key at a time. Each user key (xxx) consists of eight numbers, ranging from 0 – 255.
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