AVALON RF, INC.
Page 8
OTX627 Series User’s Guide & Operating Manual
b)
The input is electronically switched and protected against
reverse polarity. There is also a ‘under-voltage lockout’
mechanism which ensures that there is at least the minimum
operating voltage present to turn on the transmitter. In case the
input voltage is lower than the minimum, the transmitter will not
turn on. The user will see only a brief flash of the red led.
c)
Typical input current consumption for the basic configuration is
(with video present):
Model
Output Power
Input Current
OTX627
+27 dBm (0.5W)
Approx 600mA
OTX627
+23.5 dBm (200 mW)
Approx 450mA
OTX627
+20 dBm (100 mW)
Approx 350mA
Table 2 – Current Consumption
Addition of option 11 (WDL) will increase the current draw by a
maximum of 170mA.
2.3.2 Video Input.
a) The video input accepts RS170, CCIR, NTSC or PAL signals. The
type of video input is set through the GUI provided.
b) Input signal is composite video 1Vp.p with a negative sync tip of
0.3V.
c) The input impedance is 75
Ω
Ω
Ω
Ω
(ohm).
2.3.3 Audio 1 and Audio 2 Inputs.
The audio inputs accept balanced line level signals of 1Vp.p. and
have an input impedance of 100K
Ω
Ω
Ω
Ω
(ohm).
2.3.4 "Talk back" audio channel to the transmitter operator (optional).
The “talk back” output drives an electromagnetic earpiece (headset
speaker).