Rev. 02 CST38 User Manual
7
TECHNICAL
SPECIFICATIONS
Switchable channels
:
16, preset in the 140 ÷ 250 MHz range (other upon request).
Switching-window
:
10 MHz (other upon request).
Frequencies
:
microprocessor controlled PLL synthesizer circuit, with 25 kHz
minimum step
[1]
.
They are easily PC reprogrammable by the optional “UPK 32
Programming kit”.
Channel spacing : 25KHz standard (
Other on request
)
Frequency error
:
< ±5 ppm, in the rated temperature range.
Temperature range
:
-10 ÷ +55 °C.
RF output power
:
300 ÷ 10 mW (
1 dB)
[1]
.
RF output impedance
:
50 ohm (type N-F connector).
Spurious emissions
:
< 2 nW.
Transmission activation
:
remote PTT (Push To Talk) circuit, wired to ¼” (6.3 mm) mono
jack connector.
The transmission is allowed when the central pin (hot) is
connected to external ring (ground). See
Note #1
on front
page.
Modulation
:
FM (peak deviation = ±5 kHz).
Mod. audio input
:
transformer balanced, floating.
Mod. audio input level
:
Micro
/
Line
switchable, and externally adjustable between:
Micro
= -64 ÷ -34 dBu (0.5 ÷ 15 mV)
-
Input impedance = > 2 Kohm
Line
= -22 ÷ +8 dBu (60 ÷ 1,950 mV)
-
Input impedance = > 10 kohm.
Peak-limiter
:
automatic, with dynamic-range > 30 dB over the level set for
the nominal modulation.
NR system
:
compressor circuit with noise-gate, specially adapted to the
MicroEar
receivers.
AF bandwidth
:
200 Hz ÷ 5 kHz (-3 dB).
Distortion
:
< 0.5 % (0.25% typ.).
SND/N ratio
:
> 80 dB (83 dB typ.), CCITT measured.
Led indications
:
Transmitter On (red LED)
Limiter On (yellow LED).
Powering
:
10.5 ÷ 16 Vdc, 300 mA max. (negative ground).
Dimensions
:
40 x 120 x 175 mm.
Weight
:
700 g ca.
NOTE [1]:
according to local regulations
