User Manual

Page 7
3 Basics of Operation
3.1 External Connections
3.1.1 DC Power Input
DC power to operate and/or recharge the instrument is connected via a 1.3mm power socket
mounted on the right hand side of the instrument.
Use ONLY the power-supply/charger provided by TTi with the unit. Use of any other
power source will void the warranty.
The red lamp next to the socket flashes whilst charging is taking place and becomes continuous
once charging is complete.
3.1.2 RF Signal Input
The signal to be measured is connected via a standard (non reverse) SMA connector mounted
at the top of the instrument. The input impedance is 50 Ohms. The maximum allowable input
is +20dBm or +127dBuV of RF power (approximately 2.2 volts RMS), or 15V DC.
Applying a signal above these levels could damage the unit and such damage would not
be covered by the product warranty.
It should be noted that SMA connectors have a limited mechanical life and that, where frequent
connection and disconnection is expected, a sacrificial intermediate connector should be used.
3.1.3 Demodulated Audio Output
Demodulated audio (when in Zero Span Mode) is available via the built-in speaker, with the
volume level adjustable from within the application. The signal is also provided via a 3.5mm
stereo jack socket mounted at the top of the instrument. Maximum power output is 30 milliwatts
into 32 Ohms.
The signal is mono but connection can be made using either a mono or stereo plug. In the
latter case the signal will be present on both channels. Connecting the jack plug automatically
disconnects the internal speaker.