IFR2975 Digital Analog Radio Test Platform

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IFR-2975Digital / AnalogRadio Test Platform

• WWW.P25.COM
• WWW.IFRSYS.COM

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Basic System

• 33 lbs.
• Digital Architecture
• 2.7 GHz operation
• CW / FM / AM / FDMA (P25)
• Sunlight readable Color LCD
• VX Works Operating System
• Pentium Processor
• 2 GB Hard Drive
• 1.44 MB 3.5 Floppy Drive
• Download Upgrades

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2975 Basic Features

• High Stability Time Base
• 0.01 PPM
• 2.7 GHz RF Signal Generator
• 10 to -137 dBm
• FM / AM / FDMA (P25)
• IQ Modulator
• Independent of Receiver
• 1 Hz Resolution
• 2.7 GHz RF Receiver
• FM / AM / FDMA (P25)
• IQ Demodulator
• Input Protection on Antenna Input
• Independent of Generator
• 1 Hz Resolution
• Full Crossband Duplex
• 2.7 GHz split
• 1 Hz Resolution
• Signal Tracing
• Encode / Decode Simultaneously

• 2.7 GHz Spectrum Analyzer
• 10 dBm Tracking Generator
• Trace Store, Average, Compare
• 4 Function Generators
• 2 Modulation sources
• 2 Baseband Audio sources
• 600 ohm Balanced / Unbalanced
• Sine, Square, Triangle, Ramp
• Dual Channel Scope
• Channel 1 Channel 2
• Demod Audio
• External Audio
• MIC Audio
• Vocoder Output

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2975 Metering

• RF Power Meter
• 50 Watts Continuous
• 125 Watts Max
• Wide / Narrow Band
• RF Level Meter
• -10 to -100 dBm
• RF Frequency Error Meter
• RF Counter
• FM Deviation
• AM Modulation

• Audio Frequency Counter
• Distortion
• CMSG Filter
• SINAD
• CMSG Filter
• AC/DC Voltmeter
• 600 ohm Balanced / Unbalanced
• AC Volts / dBm

Meters support Upper / Lower
Limits Alarm Averaging Auto / Fixed Ranges
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P25 Features

• IMBE Vocoder
• Encode / Decode
• DES Type III (OFB) Encryption / Decryption
• P25 Data Decoder
• P25 Data Encoder
• P25 RMS Error Vector meter
• P25 Test tones
• 1011
• Calibration
• Silence
• Embedded Speech Patterns
• Function Generator or MIC audio inputs
• Demod on Scope

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I/O Features

• RS-232
• GPIB
• Ethernet
• Printer
• USB
• PS2 Keyboard
• PS2 Mouse
• VGA

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Front Panel I/O
AntennaInput
TransmitReceive
UUT TestPort
RF GeneratorOutput
Dual ChannelScope Input
Audio I/OSINAD Meter Input
MicrophoneInput
DVM Input
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Rear Panel I/O
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Flexible Operator Interface

• The operator interface allows the flexibility to
  choose display configuration.
• Spectrum Analyzer and Scope can be viewed
  simultaneously.

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Functional Test Screen Selections

• Operational Mode selections are made by pressing
  the MODE key to access a pull down selection menu.

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Selecting Function Options

• Function Option selections are made by pressing
  the SHIFT MODE keys to access a pull down
  selection menu.

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Generate (RX Test)

• Signal Generator
• CW / FM / AM / C4FM (P25)
• Receiver Stimulus
• Dual Modulation sources
• Distortion / SINAD meter
• Scope
• DVM

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Receiver Tests
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Receive (TX Test)

• Off Air Monitor
• Transmitter Test
• Power Meter
• 50 W Continuos
• 125 W 1 on / 4 off
• Cable Loss Correction
• Deviation Meter
• Distortion Meter
• Scope
• DVM
• FM / C4FM (P25)
• Off Air Measurements
• Various IF BW Filters
• 12.5 kHz, 25 kHz, 60 kHz, 200 kHz

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Alternate configuration for Receive Screen
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Transmitter Tests
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Duplex (RX / TX Test)

• Simultaneous Generate and Receive operation.
• Cross-band Repeater testing
• Signal Tracing
• All in one radio test screen
• CW / FM / AM / C4FM (P25)

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Spectrum Analyzer

• Full Span 2.7 GHz
• Independent controls
• Video Filters
• 10 dBm Tracking Generator
• Live, Average, Peak Hold
• Store Compare

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Cable Fault measurement

• The Tracking Generator level may be adjusted to
  place the dips closely to the center horizontal
  line to allow use of the grid markings.
• The Center Frequency may be adjusted to position
  one of the dips closely to a vertical grid line.

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Expanded Meters
Distortion
SINAD
Power
FM Deviation
AC Volts
AC dBm
C4FM
RF Error
AF Counter
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Project 25 Unique Features

• C4FM Modulation Analyzer
• DES OFB Type III
• Encryption / Decryption
• IMBE Vocoder (Encode / Decode)
• Embedded Voice Speech patterns
• Allows receiver testing without special test
  modes.
• Test Repeaters
• C4FM Modulation Source
• Common Air Interface Testing
• Decode Uplink Data
• Encode Downlink Data

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Common Air Interface (Uplink Data)

• Project 25 Uplink data can be decoded and
  displayed.
• Verify radio Programming.
• Verify Emergency mode without disturbing the
  system.
• Monitor for TX BER.

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Common Air Interface (Downlink)

• P25 Downlink information can be specified and
  Encoded.
• Verify new radio software loads prior to allowing
  onto the system.
• Test unusual situations to verify the radio
  responds correctly.

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P25 Test Signals

• Some common Test Signals have been defined for
  P25 measurements.
• Test Signals have been defined with a TGID of 1,
  SID of 1, and a NAC of 293.
• 1011
• When decoded, the 1011 pattern sounds like the
  traditional 1 kHz tone used to test analog
  systems.
• Calibration
• When decoded, the Calibration pattern sounds like
  an unstable 1 kHz tone. The Calibration pattern
  is a 1011 tone with a 5 Bit Error added.
• SILENCE
• When decoded, there should be no sound from the
  P25 receiver.

The IFR 2975 provides a SPEECH encoder with
defined messages to test the vocoder at any TGID,
SID or NAC configuration.
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P25 Digital Receiver Sensitivity

• The term used to quantify a digital receivers
  performance is BER (Bit Error Rate).
• The test must be conducted with a known test
  signal such as the 1011 pattern.
• Radio specific software and a computer may be
  required to evaluate a decoded 1011 tone. The
  radio is placed into a special test mode for this
  test.
• Another method is to listen to the decoded audio.
• A digital signal will stop decoding abruptly when
  the BER becomes high.

The IFR 2975 provides a SPEECH encoder with
defined messages to test the vocoder at any TGID,
SID or NAC configuration.
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C4FM Modulation Analyzer

• The Deviation level of each symbol is measured
  and the average error is displayed.
• Allows modulator accuracy testing without special
  test modes.
• High readings indicate potential reduced range or
  intermittent communications in Digital mode.

01
10
00
11
1.8
-1.8
-0.6
0.6
1.8
0.6
-0.6
-1.8
C4FM Deviation
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New Features for Version 1.30

• AM Generate / Receive
• Audio Filters
• Tone Encoding
• Store / Recall Setups
• RS-232 / GPIB / RCI
• Smartnet / Smartzone
• Meter Panel
• Synchronized Settings
• Independent Modulation Modes
• All-ON-Always

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AM Generate / Receive (New Feature)

• Receive AM Demodulation.
• Generate AM Modulation.
• AM Modulation Meter.

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Post Detection Audio Filters (New Feature)

• A variety of filters are provided for selective
  tone processing.
• 300 Hz HP/LP, 4 kHz Bessel Butterworth LP, 15
  kHz LP, 20 kHz LP, 4 kHz HP, 300 - 4 kHz
  Bandpass

• 4 kHz BESSEL filter provides sharp cutoff
• 4 kHz BUTTERWORTH provides flat response

LP
HP
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Tone Encoding (New Feature)

• Tone signaling formats for Encoding
• Tone, Tone Remote, DTMF, CTCSS codes, DCS
  Norm/Invert, Tone Signaling - 5/6 Tone, CCIR,
  CCIRH, CCIRH4, DDZVEI, DZVEI, EEA, EIA, EURO SIG,
  MODAT, NATEL, ZVEI, USER Defined

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Store / Recall Setups (New Feature)

• New storage operation allows storage of entire
  instrument states.
• Range from 0 to 10,000.
• Text Labels.
• Store setups.
• Store Screen configurations.
• Store internal or to Floppy.
• Clone setups from 1 instrument to another.
• Recall setups
• Frequency is optionally restored.
• Flexible
• Setups on floppy can be edited, emailed, copied
  or sent to the instrument through RS-232, GPIB or
  Telnet.

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RS-232 / GPIB / RCI (New Feature)

• In addition to the ETHERNET connection, the
  following interface ports and functions have been
  added
• RS-232
• GPIB
• RCI (Remote Command Interface)

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Smartnet / Smartzone (New OPTION)

• Repeater Simulator
• Analog - P25 Digital handover
• Monitor
• Control Channel Scanner

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Meter Panel (New Feature)

• Available in Generate, Receive and Duplex screens
• Allows viewing of more features simultaneously
  I.e. scope, analyzer meter panel and function
  generators all at once.
• Meters can be expanded to full size window.

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Synchronized Settings (New Feature)

• Setups for the Generator are same as for the
  Duplex Generator reducing setup time and
  providing quick display variations when switching
  from Generate to Duplex
• Setups for the Receiver are the same as for the
  Duplex Receiver reducing setup time and providing
  quick display variations when switching from
  Receive to Duplex

Click to change scope input without expanding the
scope
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Independent Modulation Modes (New Feature)

• Independent Modulation modes allow generation of
  FM / AM or P25 signals while receiving FM / AM or
  P25 signals.
• When receiving P25, both FM Deviation and C4FM
  Vector Error can be monitored.

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All-ON-Always (New Feature)

• Full time Duplex.
• Remote displays can be different.
• Multiple instruments may be running.

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IFR 2975 Radio Test Set