15 INSTALLATION & CONNECTIONS
15.1. Interface cable for SRM9000 series:
(Adds X10DR Interface cable to an existing SRM power cable)
Figure 2: X10DR- SRM9000 Interface cable.
1. Switched B+: Used to automatically turn on/off Mobile wireless rem. spk. mic. if
connected to host radio switched B+ output, if not, the user should supply
manual on/off switch.
Note: internal speaker microphone battery will still charge when the unit is turned
off.
2. External Mic Audio: Audio from the Wireless Microphone that is to be
transmitted over the host mobile radios transmitter. Adjust VR1 so MWRSM
audio matches the level from mobile mic.
3. Radio Mic Lo: This is microphone audio ground.
4. Receive Audio: Receive audio from the host mobile radio that you wish to be
sent to the Wireless Microphone. Ideally, it should be sourced pre volume
control but can be post, as long as the host mobile radio’s speaker audio has
first been sent for a comfortable listening level in the vehicle.
5. Power: connected via a 1 amp in line fuse preferably direct to a vehicle’s 12V
battery but can be any voltage from about 6-16VDC. Current consumption is
typically 60mA/Max current 420mA@6V. (12V = <200mA)
6. Ext PTT: Switched ground output designed to cause the host mobile radio to
transmit.
Doc Number:
TNM-U-E-0180 ISSUE 1.1
Page
30
