Owner`s manual

Zaxcom TRX900 and TRX900AA Recording Wireless™ Owner’s Manual
Chapter 1
3
Microphone
Use one of the following microphone models:
Other microphones will be added to this list when verification of their 3.3v power performance and RF
interference susceptibility has been completed.
The Zaxcom transmitter has an unbalanced microphone input accessed through a 3 pin Micro-Lemo
connector. You can use an unbalanced dynamic microphone or a powered lavaliere. It is recommended that
you use 3-wire lavalieres with separate pins for ground, audio, and power.
When using a line level input, an inline pad is required on the standard dynamic microphone input cable (3
pin XLR to 3 pin Micro-Lemo).
When using a 48V phantom powered microphone with the TRX900 and TRX900A, you must use an
external 48 Volt power supply. The MMT transmitter and TRX990 are the only Zaxcom transmitters with
a built-in 48V power supply.
Deneke 48 V power supplies may cause damage the mic preamp of the transmitter if connected to the
transmitter when the power supply is switched on. It is recommended to avoid this unit, if possible since
the Deneke puts a 48 VDC spike into the transmitter, when switched on.
On/Off Switch - Internal/External Power Switch
The On/OFF switch is intentionally set below the frame of the transmitter to prevent accidental powering
off during use.
When the Zaxcom Stereo Adapter is connected, On/Off switch becomes an Internal or External power
switch.
Switch Posiion
No Stereo Adapter
Installed
Stereo Adapter
Installed
ON ON Internal Power
OFF OFF External Power
Do not use the Gold model
Notes
Use only the Zaxcom 3.3v model
Sennheiser 3 VMKE-2 Platinum
WL50 5 VShure
3 VMiniture LAV 4063DPA
EMW 1.5 V
B6Countryman 1.5 V
VoltageModelBrand
Caution
!
Caution
Caution