User's Manual

PAGE 14 DESCRIPTION
Duty Cycle
100%
Audio Distortion
<5% at 1kHz, 60% deviation
Audio
Frequency
Response
+1db to –3db of pre-emphasised 300 to 3000Hz on 25kHz channel,
300 to 2550Hz on 12.5kHz channel
Hum and Noise
>40db (12.5kHz), 45db (25kHz)
Transmit Rise
Time
<25ms
3.3.3 Receiver
Sensitivity
Voice: ≥12db SINAD for 0.3µV
pd
(typically >20db) for 25kHz channel.
Data: typical FFSK performance for <10
-2
BER (<20%MER):
0.3µV
pd
– 1200 baud in 12.5kHz & 1200/2400 baud in 25 kHz,
0.5µV
pd
– 2400 baud in 12.5kHz channel. [Ref: EN300-113-1:9.1]
Rx Current
Consumption
Typical: 1.0A (20°C)
Max: 1.55A (fans & audio on maximum)
Selectivity
>73db (25kHz), >63db (12.5kHz)
Intermodulation
>70db (ETSI method)
Audio Response
±3dB of de-emphasised 300 to 3000Hz with CTCSS
Audio Output
2W
rms
internal monitor speaker
Blocking
>95dB at ±1Mhz
Hum and Noise
>40dB (12.5kHz) – CCITT weighted
3.4 FRONT PANEL CONTROLS
3.4.1 LED Indicators
On the front of the Blade there are the following 5 LED indicators (from left to right):
Legend Colour Description
Power Green Indicates presence of 3.3V DC
Tx Red Indicates unit is keyed up
Rx Yellow Indicates RF signal received
CC Orange Control Channel Activity
Alm Red Alarm indicator – access LCD ‘alarms’ menu or connect
PC to diagnose
3.4.2 LCD
On the left side of the front panel is an LCD (Liquid Crystal Display) 2-by-20 Character
Display. It indicates channel (control/traffic) and network status (master/slave). It also
indicates volume level for the internal monitor speaker and presents a menu system. See
the LCD Menu Operation section later in the manual.