30
Using the CTU with a TB9100
TBA0STU/TBA0STP CTU Operation Manual
© Tait Electronics Limited September 2005
IOIOI
This is an RS-232 serial port. Connect it to a PC running the calibration
software when calibrating or tuning the base station.
POWER
The POWER LED is lit when the CTU is powered up. Power to the CTU
is supplied using the POWER socket (see
2@
below).
Note
You do not need to provide power to the CTU at all in order to
make audio level measurements, or to use the digital inputs and
outputs. Lack of power will not affect these interfaces.
Important
Do not power the CTU from a PMU fitted with a 48V
auxiliary power supply board. The maximum supply volt-
age for the CTU is 32VDC. Use either a PMU 12VDC or
24VDC auxiliary output, or an external power supply.
NOISE
The CTU’s internal, wide bandwidth noise source is available on this
output. You can connect the NOISE socket to the RF input on the reciter
and use it to tune the receiver’s front end. The adjacent switch turns the
noise on and off. The bandwidth of the noise source is approximately
50MHz to 1 GHz, and the output level is approximately –130dBm/Hz.
This output level is equivalent to – 91 dBm typical for a narrow bandwidth
receiver, – 89 dBm typical for mid bandwidth, and –88 dBm typical for wide
bandwidth.
LINE INPUT
The CTU makes audio at this input available to the TB9100 transmitter (it
connects LINE INPUT to the analog RJ45 connector).
UNBALANCED/OFF/
BALANCED
Selects which audio output is sent to the CTU speaker. Select
“BALANCED” to direct the audio on LINE OUTPUT to the speaker. If
you select “OFF”, no audio is present on the speaker.
UB INPUT
Not used with TB9100.
UB OUTPUT
Not used with TB9100.
LINE OUTPUT
The CTU makes audio from the TB9100 receiver available on this
connector (it connects LINE OUTPUT to the balanced line output on the
analog RJ45 system interface connector). LINE OUTPUT is connected
directly to pins 1 & 2 (i.e. it is not grounded). The audio on LINE
OUTPUT can also be monitored on the CTU speaker.
b
c
d
e
f
g
h
i
