Product Manual

291, 292, 294
Users Manual
Caution
Do not apply an external voltage exceeding ±10 V.
ARB CLOCK IN/OUT
Set to an input, this is the input for a user-supplied ARB clock in the frequency range dc
to 50 MHz.
Set to an output, it outputs the system clock at TTL/CMOS compatible logic levels.
Caution
Do not apply an external voltage exceeding + 5 V or –1 V.
MAIN OUT (1 per channel)
These plugged panel positions are provided for the user to fit a 50 Ω BNC as an
alternative to each front panel
MAIN OUT socket where rear panel connections are
required in a rack-mounted system. The front panel
MAIN OUT connection must be
carefully disconnected from the pcb and the pcb then rewired, using high quality 50 Ω
coax, to the new rear panel connector.
Caution
Do not apply external voltages to these outputs.
RS232
9 pin D-connector compatible with addressable RS232 use. 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
8 TXD2 Secondary transmitted data
9 GND Signal ground
Pin 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 used in
addressable RS232 mode. Signal grounds are connected to instrument ground. The
RS232 address is set from the remote menu on the
UTILITY screen; see "System
Operations from the Utility Menu".
3-4