Section 4 Operation
4-18
2) Pin descriptions
2.1) Signal ground (GND)
This signal ground is the common grounding terminal of all signals using
this connector.
2.2) 12 V power output
The 12 V power output can be used for the DUT or external interface for
the DUT.
The maximum current capacity of this output is 50 mA.
2.3) BER measurement signal
The BER measurement signal is applied to this terminal to receive the data
output from the DUT when measuring TDMA reception.
CDMA does not support this terminal. Leave this terminal unconnected.
2.4) Press talk switch
The press talk switch is a control terminal for the transmission On/Off
switch used mainly for simplex communication.
Because CDMA does not use this terminal, leave it unconnected.
2.5) AF signal output
AF signal output (floating output) for analog transmitter measurement.
Output is made from AF Output (BNC connector) at the same time. The
output impedance is fixed to 600 Ω.
Connect the GND of the MT8801C to the GND of the DUT. Connect the
floating output – side to the low impedance side of DUT microphone in-
put.
Use a shielded cable for microphone input and connect the sheath to GND.
2.6) Spare input and output
Spare input and output are terminals provided for future expansion.
CDMA does not support these terminals. Leave these terminals uncon-
nected.
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