Connections
Front Panel Connections
RF OUT
This is the 50
Ω
generator output. The maximum output is 500mVrms (+7dBm) into 50
Ω
. It can
tolerate a short circuit indefinitely.
Do not apply an external voltage to this output.
The Type N connector is a precision component that should be protected from excessive wear to
ensure that its RF characteristics (impedance and VSWR) are accurately maintained. If the
instrument is used in a manner that demands many connections/disconnections to and from the
RF OUT it is good practice to fit a male–to–female adaptor to the socket which can be replaced
periodically.
MOD IN
This is the external FM input. Input frequency range is 300Hz to 50kHz and input impedance is
nominally 100k
Ω
.
Do not apply external voltages exceeding ± 10V peak to this input.
Rear Panel Connections
RS232
9-pin D-connector compatible with the Thurlby Thandar ARC (Addressable RS232 Chain) system.
The pin connections are shown below:
Pin
Name Description
1 -
No
internal
Connection
2
TXD
Transmitted data from instrument
3
RXD
Received data to instrument
4 -
No
internal
connection
5 GND Signal
ground
6 -
No
internal
connection
7
RXD2
Secondary received data
(ARC use only)
8
TXD2
Secondary transmitted data
(ARC use only)
9
GND Signal
ground
(ARC
use
only)
Pins 2, 3 and 5 may be used as a conventional RS232 interface with XON/XOFF handshaking.
Pins 7,8 and 9 are additionally used when the instrument is connected to the ARC system. Signal
grounds are connected to instrument ground. The ARC address is set from the front panel using
the Utilities menu.
GPIB (IEEE-488)
The GPIB interface is an option. It is not isolated; the GPIB signal grounds are connected to the
instrument ground.
The implemented subsets are:
SH1 AH1 T6 TE0 L4 LE0 SR1 RL1 PP1 DC1 DT0 C0 E2
The GPIB address is set from the front panel using the Utilities menu.
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