Klein Blackbox+ series, User Manual, Page: 12 / 18

Optional programming:
Monitor
To turn on signaling squelch, press programmed key with a “beep” sound. Press the key again to quit with two
“beeps”. This is to monitor signals that are inaudible due to the CTCSS/CDCSS squelch.
Monitor Momentary (only can be set as long key or normal key)
Press and hold the programmed key to turn on signal squelch. Release it to quit this function. This is to monitor
signals that are inaudible due to the CTCSS/CDCSS squelch at any time.
Squelch Momentary
To turn on both squelch and signaling squelch, press programmed key with a “beep” sound. Press the key again to quit
with two “beep” sounds. This is to receive weak signals and help adjust the volume when no signals are received.
Squelch off Momentary (only can be set as long key or short key)
Press and hold the programmed key to turn on both squelch and signal squelch. Release it to quit turn off both of
them. This is to receive weak signals and help adjust the volume when no signals are received.
Emergency Alert (only can be set as long key)
Press and hold the programmed key until the radio enters emergency mode. You can choose local alarm, or sending
ENI or background noise.
VOX
VOX allows you to transmit with your normal voice without pressing PTT. VOX is turned on if you press the
programmed key and hear a “beep”. Press the key again with two “beep” sounds to turn off VOX.
Announce Battery Power
Press the programmed key, you will hear “Please charge battery”, “one”, “two”, three” to indicate the current
battery level of very low, low, satisfactory, or high respectively. “3” means the battery power is full. Charge the
battery if you hear “Please charge battery”.
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