Daniels MT-3 Manuale di istruzioni - Pagina 5
Sfoglia online o scarica il pdf Manuale di istruzioni per Ricevitore Daniels MT-3. Daniels MT-3 20. 132-174 mhz 406-470 mhz low current front end
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The MT-3 Front End is a highly integrated,
frequency selective, down converter used in
Daniels Electronics standard MT-3 FM receiver
product line. RF signals at the antenna input
are filtered by a 5 pole helical filter, amplified
through a low noise amplifier, filtered again
by a seven pole low pass or high pass filter,
and then mixed, with an externally supplied
local oscillator, to produce an IF frequency of
21.4 MHz. The Front End's two main bands of
operation are 132 to 174 MHz and 406 to 470
MHz. Power for the Front End is supplied from
the receiver's regulated +9.5 volts at a typical
current consumption of 8 mA. All Front End ports
(antenna input, local oscillator input, and IF
output) are designed for 50 Ω terminations.
PER FO R MA N C E SP EC I F I C AT I O N S
Frequency Range:
Bandwidth (3 dB):
Conversion Gain:
IF Frequency:
Local Oscillator Injection:
Impedance:
Power Requirements:
132 MHz - 174 MHz (VHF)
406 MHz - 470 MHz (UHF)
greater than 5 MHz (VHF Preselector Filter)
greater than 7 MHz (UHF Preselector Filter)
typically 12 dB (VHF)
typically 6 dB (UHF)
21.4 MHz
+7 dBm maximum, high or low side injection
depending on frequency band
50 Ω at all ports
8 mA at +9.5 Vdc
Printed Copy Not Controlled
GENERAL
INFORMATION
MT-3 Low Current Front End Instruction Manual
1
IM11-FE3