UHF band three channels receiver unit
BD-URZ

Outline
  • They are micro [ for 400Mhz band ], and a three high sensitivity receiver unit for narrow-band FM.
  • Since the crystal element is used for the local oscillation circuit, there is very little phase noise and it demonstrates might to reception of minute level data.
  • It is a double superheterodyne system. The 2 steps of high frequency amplifier which carried out the internal organs of five steps of LC filter circuits, and the first intermediate frequency are 10.7Mhzes, and the 2nd intermediate frequency is 455Khzes. For the first rank, -30db and the first intermediate frequency wave are [ -40db and the 2nd intermediate frequency wave of the damping characteristic over an image wave ] -40dbs. The comprehensive characteristic in front of detection It is set to -80 or more dbs.
  • Since the voltage stabilization circuit is built in, it operates stably in 2.6V or 6V.
  • It is micro, and since it operates with low voltage and few current, a prolonged battery drive is attained as a receiver unit for [ various ] data communication.
  • Since it is micro, it is possible to be used by building in various apparatus.
  • The voice output circuit in which level adjustment is possible is also built in, and the direct drive of the speaker to 8 ohms (when power supply voltage 3V) can be carried out.
  • Since the standard article is the adjustment of three channels (398.605Mhz, 399.030Mhz, 399.455Mhz), it can only connect a power supply and can use it immediately. (Manufacture is possible in 370 ~ 450MHz) It is the internal-organs unit of a micro three channel receiver (KUR-400), a remote control transmitter (KRT-400T), (SCR-200T), a remote control receiver (KRT-400R), scramble receiver (SCR-100R),(SCR-200R) and the three channels discovery receiver (KRS-300), (KRS-300S) for pursuit. .Repeater (RP-300).
Directions


  • VOL of the above figure left is a volume adjustment knob, and ANT is an antenna terminal. ON OFF is a power supply switch. SP is a speaker terminal and EAR is an earphone jack. ABC is a channel change switch and +- is a power supply supply terminal. The right figure HF1234 is the alignment adjustment trimmer of a high frequency incoming signal. IF455K are the alignment adjustment for detection, and SQ is the adjustment of a level to which nothing is made to say. OSC is alignment adjustment of the First local source oscillation, and OS3f is alignment adjustment of the 3 times wave. OS9f is alignment adjustment of the 3 times wave further. AAdj, BAdj, and CAdj are the fine-tuning trimmers of the first local oscillation frequency of each channel. Since these are all adjustments, please do not turn them by any means.
  • When carrying out automatic recording combining the transmitter for a telephone or a sound starting hearing transmitter, and the tape recorder with a commercial voice starting recording function, it is used by connecting the recording code (option) of exclusive use with the earphone terminal of a receiver, and the external microphone terminal of a recorder. If the newest IC recorder is used, a part for 10 hours or more can be recorded continuously, and what was moreover taken in and saved in the personal computer can also be reproduced and heard.
Specification of BD-URZ
      The receiver unit for narrow-band frequency modulation
      Received frequency
        A channel 398.605Mhz
        B channel 399.455Mhz
        C channel 399.030Mhz Switch select
        A three channel setup is [ at 370 ~ 450MHz ] arbitrarily possible in less than 1MHz of zones (OEM).
      Receiving sensitivity 0.3microV (-117dbm) S/N 20db
      Voice output 250mW (speaker impedance 32 ohm, 6V consumption current 60mA)
      Power supply voltage 2.6V ~ 6V
      Consumption current About 9mA (at the time of silent) About 6mA (at the time of standby)
      Operating temperature -5 degrees C ~ 50 degree-C
        (less than +- 2 Khzes of the First Bureau frequency fluctuation)
      Antenna Impedance 50 ohms (RCA terminal)
      Outside size length 30mm long, 23mm wide, height pile of 12mm
      Weight 12g
Notes
  • Since the trimmer is an adjustment, please do not touch. The speaker is BTL system. When you build in other apparatus and you carry out a power supply in common, an audio output should cut D.C by the capacitor and should connect it with other circuits.