UHF band FM transmitter unit with audio frequency amplifier
BD-KAT

Outline
  • It is a micro UHF band narrow-band FM transmitter unit with built-in audio amplifier of a high impedance input and 50db amplification.
  • It is very efficient. At the time of power supply voltage 3V, consumption current is 9mA and a high frequency output is 8mW.
  • By changing power supply voltage, it can carry out variable [ of the high frequency output ].
  • The characteristic of unnecessary radiation is excellent. (-50 or less dbs) It is micro. It condenses to the size of 12x18x6mm with the newest technology.
  • Inclusion is possible to various apparatus as exciter of FM transmitter again as a feeble electric wave transmitter of various data.
  • It excels in the stability of oscillation frequency. Various remote sensing is possible in the normal temperature range (-10 ~ 50 degree C) combining less than +- 2 Khzes micro receiver unit (BD-URZ).
  • It is possible for it to be intermittent by the existence of an audio input in an electric wave output. It is the internal unit of the transmitter (KT-400, KT-400D, KTL-400, KAZ-110, KBZ-110, KCZ-110) for possible (BD-KATV) sounds, a remote control transceiver device (KRT-400T and KRT-400R), the transmitter for pursuit (KTB-400, KTB-400D, KTB-500), and the transmitter (KTT-750, KMT-950) for a telephone without change on an outside size or consumption current.
Directions

  • Above figure left Out is the output of an electric microphone (Mic) and Freq Adj is fine tuning of oscillation frequency.
  • As for the center of the above figure, in the back of the left figure, Ant becomes an antenna terminal with a high frequency output terminal. GND is a grounding terminal. DC Sup is a power supply terminal. 1stReso Adj is alignment adjustment of a 3 times as many resonance circuit as crystal oscillation frequency. 3fAdjs are 3 times as much resonance adjustments as that further. 9fAdjs are 3 times as much resonance adjustments as that further. LP Filt adjusts attenuation of the harmonics of an output electric wave. output frequency -- 27 of a crystal oscillation -- it has doubled
  • Above figure right Optin Boad is in the state which attached the option function. (BD-KATV) Since the main part is an adjustment, it only connects a battery and an antenna and can use them as a minute sound hearing transmitter immediately.
  • A built-in electronic microphone is removed, various sensors (a vibrograph, a heartbeat meter, pulse meter, etc.) are directly attached in the portion, and remote sensing becomes possible.
  • An exclusive receiver (KUR-400) is used for receiving. Or it is also possible to make a micro receiving unit (BD-URZ) build in various apparatus, and to receive. Commercial UHF belt Although it is receivable with a multi-channel receiver, tone quality is bad or a receivable distance becomes short.
  • If an option (sound starting dispatch system) function is used, prolonged automatic recording will be attained combining the recorder of a voice starting recording system. If the newest IC recorder is used, a part for 8 hour 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-KAT
        Narrow-band frequency modulation type transmitter unit
        Oscillation frequency A: 398.605Mhz B: 399.455Mhz C: 399.030Mhzes One either
          (manufacture in the range of 370Mhz ~ 430Mhz is possible for a custom-made item)
        The maximum frequency deviation +- 10Khz
        Power supply voltage 2.5 ~ 5V
        Consumption current 7 ~ 15mA
        High frequency output 3 ~ 20mW
        Audio input impedance 40kohm (change is possible to 400 kohm)
        Antenna output impedance 50ohms
        Unnecessary radiation Less than [ -50db ]
        Frequency stability Below +- 5 ppm (-10 degree-C ~ 50 degree C)
        Operating temperature range -10 degree-C ~ 50 degree C
        Outside size 12x18x6mm
        Weight About 2g
Notes
  • It may damage, if it is used by applying the voltage beyond 5V. Please do not transfer a trimmer or do not make nothing a measuring instrument (a spectrum analyzer, counter) by any means.