25
MB1 User Manual
© 2016 Expert Electronics
CONNECTIONS
2.5.6
XVTR
Transverters for the VHF, SHF bands may be connected to the transceiver via the XVTR
connector.
In RX mode, the XVTR functions as the input, in TX mode the XVTR functions as the output.
In TX mode, there is a co 5V on the signal line with the HF signal. This constant voltage
may be used for automatic control of the transverter in TX mode.
VHF, SHF band Transverters may also be connected to the transceiver via the RX I N and DAC
OUT connectors.
RX I N used as the input in RX mode. DAC OUT is used as the output in the TX mode.
The DAC OUT connector does not have DC voltage for controlling TX mode, so it is necessary
to use an additional TX mode controlling line, while you use it. You could use any EXT CTRL
key connector or PA PTT line (more details in
).
XVTR input /out put paramet ers:
Intermediate Frequency: 1...70 MHz, 90...150 MHz
IF band: up to 80 MHz
Impedance: 50 Ohm
XVTR input sensitivity: -115 dBm
Signal level in TX mode: +10 dBm (max)
DC level: +5 V (in TX mode)
2.5.7
DAC OUT low power output
DAC OUT is the transceiver's low-power output, which functions in the wide frequency band.
It could be used for connection of external power amplifiers, transverters and as a source of a
measuring signal.
To work with DAC OUT choose it in the antenna switch menu (more details in
).
DAC OUT out put paramet ers:
Frequency band: 0.1...150 MHz
Transmitted signal band: 20 kHz
Impedance: 50 Ohm
Signal level: +10 dBm (max)
23
56
