Midian IS-1, Руководство пользователя

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6
HARDWARE ALIGNMENT
The IS-1 can use VOX or COR from one radio to act as a PTT to key the other radio. COR is the preferred
method if the radio offers this connection as it will not drop out if the user stops talking momentarily. When using
COR turn off the VOX dip-switch.
There is a dip-switch that can drop the audio output level from about 1.3 Vpp to 650 mVpp so as not to over drive
the opposite radio’s modulator. There is another dip-switch that can set the impedance of the mic input. Turning
the impedance switch to low will allow you to drive an old two way radio or military man pack that uses the old
carbon mic or carbon mic equivalent (amplified mic).
After connecting the cables to the radios, turn on the radios and set the volume control to a low level of say one
quarter to one half off the low end. The AGC will provide a constant level for ranges of 50 mVpp to 20 Vpp. Most
portable radios, if turned to max volume, will distort the audio wave form at the speaker.
DIP-SWITCH SETTINGS
The following table shows the default jumper settings and their function:
Dip-Switch
Number
Default
Position
Description
SW1-1 Off Radio 1 Hang Time Switch (on = ~600 msec - off = ~900 msec)
SW1-2 Off Radio 2 VOX Enable Switch (on = VOX - off = COR)
SW1-3 Off Radio 1 Output Audio Impedance (on = 1 K Ohm - off = 47 K Ohm)
SW1-4 Off Radio 1 Output Audio Level (on = 650 mV p-p - off = 1.3 V p-p)
SW1-5 Off Radio 2 Output Audio Level (on = 650 mV p-p - off = 1.3 V p-p)
SW1-6 Off Radio 2 Output Audio Impedance (on = 1 K Ohm - off = 47 K Ohm)
SW1-7 Off Radio 1 VOX Enable Switch (on = VOX - off = COR)
SW1-8 Off Radio 2 Hang Time Switch (on = ~600 msec - off = ~900 msec)