8. COR/squelch/audio unmute: Input designed to monitor the receive status of
the host mobile radio. Ideally, it is driven by an “audio unmute” switched
ground command in the host mobile. i.e. when the radio’s speaker unmutes to
pass audio then the COR input should toggle in sync. Alternatively, it could be
driven by the radio’s unsquelch command that factors in reception of required
correct CTCSS tones, etc. An internal dip switch caters for active low or high
inputs. Where COR is not available the MWRSMs vox capability in most cases
alows satisfactory operation.
9. Ground: DC /Digital ground connection.
10. Not Used:
11. Not Used:
12. Not Used:
13. Remote PTT: This provides a remote alternative to transmit Mobile microphone
audio via the host mobile radio. You may choose to connect to a motorbike
handle bar PTT, a hidden palm or footswitch, a wireless PTT device, or even to
an output from the host mobile equipped to provide remote radio monitoring
of the Mobile microphones users audio. In such remote monitoring cases, use of
the remote PTT input causes the sensitivity of the INTERNAL Mobile
microphone to be greatly increased, so a control room operator can more easily
monitor the health or safety of the user. There is no increased audio gain when
a headset is connected to the audio port at the base of the Mobile microphone.
14. Knockdown To allow the control head to turn off, the pull down resistor needs
to be connected to the radio switched battery output.
15.3. Interface cable for SDM700 series:
(Adds X10DR to the SDM700 mobile radio)
Figure 4: X10DR- SBM700 Interface cable.
Doc Number:
TNM-U-E-0180 ISSUE 1.1
Page
33
