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2.3

RECEIVER (DTX-965)

Operating Bandwidth

Up to span of the sub-band

Sensitivity (12 dB SINAD @ 1 kHz w de-emphasis)

0.25 uV (-119.0 dBm) typical

RF Input Impedance

50 ohms nominal

Adjacent Channel Selectivity

+/- 12.5 kHz w narrow IF

60 dB min.

Spurious and Image Rejection

IF/2

100 dB min.

Image & other

70 dB min.

Intermodulation Rejection

80 dB min.

FM Hum and Noise

Very narrowband (5/6.25/7.5 kHz) operation

40 dB min.

Narrowband (12.5/15 kHz) operation

45 dB min.

Wideband (25/30 kHz) operation

50 dB min.

Conducted Spurious

-70 dBm max.

Receive Attack Time (transmit to receive)

10 ms max.

Carrier Detect Attack Time

5 ms max.

Audio Distortion

5 % max.

Audio Response (+1/-3 dB, ref 1 kHz)

Narrowband and wideband versions:

w de-emphasis

400 Hz to 2500 Hz

w/o de-emphasis

100 Hz to 3500 Hz

Very narrowband versions:

w/o de-emphasis

100 Hz to 1500 Hz

Receive Current Drain

Depends upon supply voltage options
(see chart elsewhere in manual).

AUX OUT Adjustment Range (60 % rated dev.)

w de-emphasis (@ 1 kHz)

20 to 800 mVrms open circuit

w/o de-emphasis (@1 kHz)

35 to 900mVrms open circuit

Содержание DTX-165-0

Страница 1: ...RITRON INC PRELIMINARY 08 16 RITRON MODELS DTX X65 SERIES PROGRAMMABLE FM TRANSCEIVER MODULES MAINTENANCE OPERATING MANUAL PRELIMINARY FOR USE ONLY BY AUTHORIZED SERVICE MAINTENANCE PERSONNEL...

Страница 2: ...SUPPLY VOLTAGE 5 3 DUTY CYCLE KEY DOWN LIMITATIONS 5 4 OPERATING MODES 5 5 RNET COMPATIBILITY MODE 6 PROGRAMMING 6 1 PC PROGRAMMING KIT 6 2 LOADING THE PROGRAMMING SOFTWARE 6 3 COMPUTER SOFTWARE COPY...

Страница 3: ...or 1 VHF 136 174 MHz bands 2 216 222 MHz band 3 340 400 MHz bands 4 UHF 400 430 MHz and 450 470 MHz bands 9 896 901 MHz band B is the sub band designator G 136 162 for 1 above 340 360 MHz for 3 above...

Страница 4: ...SS AND CONTROL INFORMATION AND OPERATIONAL INSTRUCTIONS TO ENSURE COMPLIANCE WITH THE FCC S AND IC S RF EXPOSURE GUIDELINES NOTICE This radio is intended for use in occupational controlled conditions...

Страница 5: ...iates measurable RF energy only while it is transmitting during talking not when it is receiving listening or in standby mode The DTX two way radio complies with the following RF energy exposure stand...

Страница 6: ...c Antennas other than those shown in Table 1 must be tested with the High Power DTX module for RF exposure compliance in the environment in which it is to be used per the FCC s OET Bulletin 65 Edition...

Страница 7: ...30 MHz DTX 465 A 420 440 MHz DTX 465 B 430 450 MHz DTX 465 0 450 470 MHz DTX 465 C 470 490 MHz DTX 465 T 490 512 MHz DTX 965 0 896 901 MHz 935 940MHz Not Available Yet Number of Channels 8 Transmit Re...

Страница 8: ...Supply Input Connector 2 Pin Molex Data Interface 15 pin subminiature D type Operating Temperature 30 to 60 C Maximum Dimensions L x W x H 6 6 x 5 0 x 2 4 including connectors Weight 35 oz...

Страница 9: ...uency Response 1 3 dB ref 1 kHz Narrowband wideband versions w pre emphasis 200 Hz to 2500 Hz w o pre emphasis 50 Hz to 2700 Hz Transmitter Attack Time 10 ms max Spurious and Harmonics 13 dBm max FM H...

Страница 10: ...15 kHz operation 45 dB min Wideband 25 30 kHz operation 50 dB min Conducted Spurious 70 dBm max Receive Attack Time transmit to receive 10 ms max Carrier Detect Attack Time 5 ms max Audio Distortion 5...

Страница 11: ...tput for data 9 PGN IN OUT Programming I O External programmer connects here 10 CTS Clear to Send Asserted when transmitter can accept modulation 11 RX MON Monitor Breaks squelch in receive 12 AUDIO O...

Страница 12: ...r filter 8 AUX OUT This is the broadband output of the receiver The gain from the receiver to the output is programmable as is the use of de emphasis The choice of AC or DC coupling from the RF board...

Страница 13: ...an internal 10 k pull up to 5 volts It can source up to 10 mA when low 14 PTT RTS Push to Talk Request to Send This input commands the unit to transmit Input levels are TTL CMOS polarity may be progra...

Страница 14: ...ked upon a push to talk activation Changes in channel during transmit will not change the transmit operating channel of the unit until the unit is cycled from transmit to receive and back to transmit...

Страница 15: ...CLE KEY DOWN LIMITATIONS DTX 965 The major heat generating component within the modules is the RF power amplifier which has a maximum temperature limit that should not be exceeded In addition the temp...

Страница 16: ...acing the PTT RTS Push To Talk Request To Send input in its asserted state This state is programmable If the unit is to operate in simplex transmitter and receiver on the same frequency one should che...

Страница 17: ...cted directly to the module s BNC connector unless the RF output power is set for less than 5 watts or the module is placed within another RF tight enclosure 5 6 RNET COMPATIBILITY MODE The DTX module...

Страница 18: ...The RITRON Inc products described in this manual include copyrighted RITRON Inc computer programs Laws in the United States and other countries grant to RITRON Inc certain exclusive rights in its copy...

Страница 19: ...rmal this button is performs the same as the update radio button below 4 Update Radio This button is used to update the radio with all of the changes that have been made via the programmer Although th...

Страница 20: ...ve RX Discriminator Coupling Selects whether the coupling from the discriminator output on the RF board is AC or DC coupled to the control loader board Since the audio outputs of the control loader bo...

Страница 21: ...ALIGNMENT The alignment page is used for setting the values of the digital gain settings which are used for aligning the unit and setting the gains of the audio paths The unit leaves the factory alre...

Страница 22: ...ed that the power levels be set different values for different channels the desired power levels can be inserted into the box at the bottom of the page Note however if a change is made in the TX Low P...

Страница 23: ...the radio CMOS circuit must be grounded before handling the radio Normally the technician wears a conductive wrist strap in series with a 100 k resistor to ground 3 Clothing Do not wear nylon clothin...

Страница 24: ...criminator The resonator for the discriminator is Y103 2nd Local Oscillator The two mixers in this radio act to produce an output signal whose frequency is equal to the difference between the frequenc...

Страница 25: ...ilter and T R Switch When driven by 17 dBm the PA module U201 is capable of producing full rated power at the antenna connector Pin 2 of the module is used for power control The output power level can...

Страница 26: ...DC and 3 3 VDC for the control loader board 9 HARDWARE OPTIONS The DTX is setup at the factory in a configuration that should be acceptable for most users The most common changes required are effected...

Страница 27: ...of 7 Ampere minimum current RF Signal Generator capable of operating at the carrier frequency of the module with an output level adjustment and able to be frequency modulated FM Demodulator Deviation...

Страница 28: ...y squelch threshold which may have been set 70 dBm should be sufficient If not squelch can be disabled via the settings menu of the programmer for this procedure With an oscilloscope connected to the...

Страница 29: ...mitting unless it has been allowed to cool to the correct temperature Likewise the adjustment itself should be made as quickly as possible The unit should be set to a channel which is at an output pow...

Страница 30: ...modulated waveform on the oscilloscope begin increasing the audio oscillator s output level or the Aux In setting The waveform should begin as a sinewave and at some point show clipping The clipped po...

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