Connections
MAIN OUT
MAIN OUT is a 50
Ω
output. To maintain waveform integrity only high quality 50
Ω
connecting
cables should be used and the receiving end should be terminated with a 50
Ω
load.
Do not short-circuit or apply external voltages to this output.
AUX OUT
The AUXiliary output provides a fixed level pulse output with the same frequency and symmetry
as MAIN OUT and capable of driving up to 4 standard TTL loads.
EXT SWEEP, AM/FM IN
An external signal applied to the EXT SWEEP input can be selected to modulate either the
frequency or amplitude of the generator output.
Do not apply external voltages exceeding ± 10V.
RS232
The RS232 interface permits remote control using the optional PC420 Windows software.
The 9-way D-type socket on the generator has the following pin-out and should be connected to
the PC’s serial port using a 9-way cable with all connections made.
Pin Name
Description
1 No
connection
2
TXD
Transmitted data from instrument
3
RXD
Received data to instrument
4 No
connection
5 GND
Signal
ground
6 No
connection
7 No
connection
8 No
connection
9 No
connection
Signal ground is connected to instrument safety ground.
To ensure compliance with EMC legislation use only screened cable assemblies with screened
connectors when connecting to other equipment.
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