134 Appendix E Testing with the TBA0STU Calibration Test Unit TB9300 Installation and Operation Manual
© Tait International Limited April 2024
Note 1 The TB9300 reciter provides +5.2V on pin 13 of the system interface. This
is insufficient for correct operation of the CTU’s audio amplifier. The
supplied power cable should be connected to the PMU auxiliary 12V or
24V power supply.
Do not power the CTU from a PMU fitted with a 48V auxiliary power
supply board.
If you are not using the LED indicators or built-in audio amplifier, it is not
necessary to connect a power supply.
Note 2 The noise source in the reciter itself should be used for receiver tuning and
sensitivity measurements. See Receiver test at the bottom of the Diagnose
> RF interface > Receiver tab WebUI page.
A signal level graph that can be used to tune the receiver with the reciter
built-in noise source can be accessed from the Diagnose > RF interface >
Signal level tab, check the calibrated noise source check box.
Note 3 The antenna relay is supported by P25 version 2.60 (and later) and DMR
version 3.20.01 (and later) base station firmware.
TaskBuilder can operate this output as Digital output 13 in version 3.25
(and later) base station firmware.
Connecting the CTU to the Reciter DB25 System Interface
Use the DB25 ribbon cable to connect the DB25 system interface
connector,
1! on the CTU, to the system interface connector on the back of
the reciter.
Connect the power input to the PMU auxiliary output if required.
Connecting the CTU to the RJ45 from a TBC101A E&M Isolation Adaptor
Connect the power input of the CTU to the PMU auxiliary output.
Connect the RJ45 patch cable to the E&M isolation adaptor and the RJ45
connector on the CTU
1).
2@
DC input Supported (see Note 1) Connect a 10 to 32VDC power
supply to this input. This supply
powers the speaker and LEDs.
2#
System control bus connector Not supported
Function Supported by TB9300 Information
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