User's Manual

Telex ST-300 Transmitter Page 4
Power Lock: To lock the power button ON, Press the set and the up and the down
buttons at the same time until a small “lock” icon near the channel icon flashs two
times. The lock icon will then disappear. Pressing the power button while in lock
mode will cause the lock icon to flash. To de-select the lock function, Press the set
and up and down buttons again until the icon flashes one time. The power button
will then be unlocked.
RF Power: RF Power is normally set to “High”. The display will show RF Power:
High. For multiple frequency installations and re-use of frequencies, Low power
output may be desired. In no case is the power raised beyond approved levels. To
select Low power, Press set and down buttons at the same time. To select High
power, press the set and up buttons at the same time.
SW Revision: Press and hold the down button. The Revision Number will be
Displayed in the Balanced and Unbalanced gain digits.
Specifications:
Audio Input……………………………………….Female XLR
Level, MICrophone selected…………………….. 0.5 to 70mV
Impedance, Microphone selected……………….. 2 K Ohm
Level, 600 Ohm selected………………………... 70 mV to 7.0 V
Impedance, 600 Ohm selected………………….. 300 K Ohm
Level, 70 V selected…………………………….. 7.0 to 70 V
Impedance, 70 V selected………………………... 150 K Ohm
Audio Input………………………………………..Female ¼ inch
Level…………………………………..10 mV to 1.0 VRMS Un-balanced
Impedance………………………………………...10 K Ohm
Signal To Noise Ratio………………...56 dB Un-companded, 77dB companded
Pre-emphasis………………………………….….115 uSeconds
Maximum Deviation……………………………..25 KHz
Number of Channels……………………………..17, user selectable
Frequency Range…………………………………72.1-75.9 MHz (in selected steps/channels)
See Channel/Frequency Chart.
RF Power Output……………………………….80,000 uV/M @ 3 M.