COMTEK BST-75 - Manual (Page 14)

Page 12
Audio Inputs:
Line level balanced input
0 dBm for 80% modulation
(+20 dBm max, XLR-3F)
Unbalanced input (+5 dBm Max)
or two wire electret microphone
with bias voltage for electret
microphone (-35 dBv at 5 K ohms)
with 1/4” phone jack.
Connectors:
XLR-3F Combo with 1/4”
phone jack
Barrel type 5.5mm X 2.1mm
power jack AC or DC
BNC type RF output
Operation Indicators:
LED bargraph VU meter
LED antenna load and coaxial
cable condition indicator
LED DC power indicator
Antenna:
19” Telescopic antenna mounts
directly into top of transmitter
BNC RF output connector for
optional external antenna
FCC Compliance:
Type Accepted under FCC
Part 90
Power Requirements:
12 Volts AC or DC, 200 mA max
Frequency Response:
80 Hz to 10 kHz
Audio Distortion:
Less than 0.5% at 80% modulation
Modulation Limiter:
Peak compressor type with
high linear overload protection
(25 dB). Attack time less than
1 ms, recovery time 10 ms
Audio Processing:
Companded and non-companded
to accommodate a variety of
receivers
Audio Gain Control:
Limited to 20 dB
Frequency Modulation:
10 kHz deviation for
narrow band companded
RF Output Power:
Maximum power output for
FCC Part 90 (120mW)
Frequency Stability:
Better than 0.002% digitally
synthesized, crystal controlled
Operating Frequency:
72.020 to 75.980 MHz
88 “Flash Memory”
programmable channels
Harmonic and Spurious Emissions:
Better than 50 dB below carrier
Dimensions:
3 3/4" X 1 5/8" X 5 1/4" deep
Weight:
15 1/4 oz.
BST-75 SPECIFICATIONS
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NOTE: Specifications subject to
change without notice