User's Manual
IFBR1a, IFBR1a/E01, IFBR1a/E02
LECTROSONICS, INC.
12
Operating frequencies (MHz):
 US   E02   
  Block 470  470.100 - 495.600  779.125 - 787.875
  Block 19  486.400 - 511.900  797.125 - 805.875
  Block 20  512.000 - 537.500  806.125 - 809.750
  Block 21  537.600 - 563.100 
  Block 22  563.200 - 588.700
  Block 23  588.800 - 607.900 and 614.100 - 614.300
  Block 24  614.400 - 639.900
  Block 25  640.000 - 665.500
  Block 26  665.600 - 691.100
  Block 27  691.200 - 716.700*
  Block 28  716.800 - 742.300*
  Block 29  742.400 - 767.900*
  Block 944  944.100 - 951.900
 E01
  Block 470  470.100 - 495.600 
  Block 19  486.400 - 511.900 
  Block 20  512.000 - 537.500 
  Block 21  537.600 - 563.100 
  Block 22  563.200 - 588.700
  Block 23  588.800 - 607.900 and 614.100 - 614.300
  Block 24  614.400 - 639.900
  Block 25  640.000 - 665.500
  Block 26  665.600 - 691.100
  Block 27  691.200 - 716.700*
  Block 28  716.800 - 742.300*
  Block 29  742.400 - 767.900*
  Block 30  768.000 - 793.500
  Block 31  793.600 - 819.100   
  Block 32  819.200 - 844.700
  Block 33  844.800 - 861.900
  Block 606  606.000 - 631.500
  *Available for export only
NOTE: It’s the user’s responsibility to select the approved 
frequencies for the region where the transmitter is operating.
Specifications and Features
Number of frequencies:  256 per block (79 in block 944, 172 in block 33)
Channel spacing:  100 kHz
Frequency control:  Crystal Controlled Phase Locked Loop
Sensitivity:  1 uv (20 dB SINAD)
Signal/Noise ratio:  95 dB A-weighted
Squelch quieting:  90 dB
AM rejection:  50 dB, 10 uv to 100 mv
Modulation acceptance:  ±20 kHz
Spurious rejection:  Greater than 70 dB
Third order intercept:  0 dBm
Frequency response:  100 Hz to 10 kHz, (±1db) 
Pilot tone:  29.997 kHz, 4.5 kHz deviation 
    (fixed crystal controlled)
Audio output, headphone:  1 Volt RMS into 50 ohms minimum
Antenna:  Headphone cable 
Min. headphone impedance:  25.6 Ohms
Programmable memory:  Switches set default frequency; up to 10 additional 
    frequencies can be stored in memory
Front panel controls:  Single knob controls Audio Output Level, 
    Power on, programming and Scan Frequency Selection
Indicators:  1 tricolor LED Indicator for power on, blinks to 
    indicate channel number, blinks fast during scan, 
    and turns yellow or red for low battery
Battery Requirement:  9V alkaline battery lasts about 8 hours 
    9V lithium battery lasts about 20 hours 
Power consumption:  60 mA
Allen wrench for knob:  0.035” (Lectro part number: 35854)
Weight:    7.3 oz with battery
Size:    3.6 x 2.4 x 0.8 inches (91.44 x 60.96 x 20.32 mm)
Specifications subject to change without notice.










